WL50 Wheel Loader Manual

WL50 Wheel Loader Manual
Operator’s Manual
Wheel Loader WL 50
www.wackerneuson.com
December 08 Edition
You have opted for a Wacker Neuson loader – thank you very much for putting your trust in us.
Your Wacker Neuson loader is a powerful product with robust technology and a wide range of applications to aid you in
your day-to-day work. In order to familiarize yourself with your loader in a quick, comprehensive manner, please read
this Operator’s Manual attentively.
In addition to the information regarding operation, this Operator’s Manual also contains important maintenance and operating instructions for conserving the value of your loader. Furthermore, we will show you how to operate your loader in
an environmentally sound manner.
Should you have any questions or problems relating to your loader, please contact your Wacker Neuson partner or importer. They will be happy to respond to your questions, suggestions or criticisms at any time.
We are confident that you will be very satisfied with your new Wacker Neuson loader.
Wacker Neuson Construction Equipment AG
2
CONTENTS
TABLE OF CONTENTS
PREFACE................................................................................................................................................................ 7
1
BASIC INFORMATION...................................................................................................................................... 8
1.1
Notes about this Operator’s Manual........................................................................................................ 9
1.2
Explanation of the symbols used in this Operator’s Manual.................................................................. 10
1.3
Warranty and liability............................................................................................................................. 11
1.4
Intended use.......................................................................................................................................... 12
2
BASIC SAFETY INSTRUCTIONS................................................................................................................... 14
2.1
Organizational measures....................................................................................................................... 15
2.2
Selection and qualification of personnel / basic duties.......................................................................... 17
2.3
Safety instructions for certain operating phases................................................................................... 18
2.3.1
Safety instructions for normal operation................................................................................................ 18
2.3.2
Safety instructions for other operating modes....................................................................................... 20
2.4
Safety instructions for particular hazards.............................................................................................. 23
2.4.1
Forklift attachment................................................................................................................................. 23
2.4.2
Working near overhead power lines...................................................................................................... 24
2.4.3
Electrical power..................................................................................................................................... 25
2.4.4
Flying sparks / fire danger...................................................................................................................... 25
2.4.5
Gas, dust, steam, smoke....................................................................................................................... 26
2.4.6
Hydraulics, pneumatics.......................................................................................................................... 26
2.4.7
Tip-overs................................................................................................................................................ 27
2.4.8
Noise...................................................................................................................................................... 27
2.4.9
Oils, grease and other chemical substances......................................................................................... 27
2.5
Transporting and towing / restarting...................................................................................................... 28
CONTENTS
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2.6
2.7
2.8
2.8.1
2.8.2
2.8.3
2.8.4
2.8.5
2.8.6
2.8.7
Final decommissioning / dismantling..................................................................................................... 28
Safety labels used.................................................................................................................................. 29
Safety devices........................................................................................................................................ 34
Fire extinguisher.................................................................................................................................... 34
Rotating beacon..................................................................................................................................... 34
Seat belt................................................................................................................................................. 35
Emergency exit...................................................................................................................................... 36
Backup alarm for reverse drive.............................................................................................................. 36
Battery disconnect switch...................................................................................................................... 37
Loader lift arm locking system............................................................................................................... 38
3
TECHNICAL DATA........................................................................................................................................... 39
3.1
Technical description............................................................................................................................. 39
3.2
Loader data............................................................................................................................................ 41
3.3
Product identification number plates...................................................................................................... 43
3.4
Dimensions............................................................................................................................................ 44
4
DESCRIPTION OF THE INDICATOR, WARNING AND CONTROL ELEMENTS.......................................... 46
4.1
Operating elements and instruments..................................................................................................... 46
4.2
Control and warning lights..................................................................................................................... 48
4.3
Indicator devices.................................................................................................................................... 52
4.4
Switches / rotary switches..................................................................................................................... 53
4.5
Rocker switches..................................................................................................................................... 54
5
OPERATING AND OPERATION..................................................................................................................... 58
3
4
CONTENTS
5.1
5.1.1
5.1.2
5.1.3
5.1.4
5.1.5
5.1.6
5.2
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.2.6
5.3
5.3.1
5.3.2
5.3.3
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
5.4.7
Before starting up.................................................................................................................................. 58
Fueling................................................................................................................................................... 58
Operation............................................................................................................................................... 60
Doors and windows............................................................................................................................... 62
Adjusting the operator’s seat................................................................................................................. 65
Adjusting the steering column................................................................................................................ 68
Seat belt................................................................................................................................................. 69
Starting up............................................................................................................................................. 72
Lighting system and forward warning device......................................................................................... 72
Wipers and windshield washer system.................................................................................................. 74
Headlights and rotating beacon............................................................................................................. 76
Ventilation and heating of the cab.......................................................................................................... 78
Before starting the engine...................................................................................................................... 80
Starting the engine................................................................................................................................. 81
Propulsion operation.............................................................................................................................. 84
Preparation for travel in public traffic..................................................................................................... 84
Travel speed........................................................................................................................................... 85
Stopping and parking............................................................................................................................. 89
Work operation....................................................................................................................................... 90
Operating lever for Loader lift arms....................................................................................................... 92
Loader lift arms locking system............................................................................................................. 94
Activating the optional hydraulics........................................................................................................... 95
Differential lock.................................................................................................................................... 100
Changing attachments......................................................................................................................... 102
Bucket.................................................................................................................................................. 109
Tip-overs...............................................................................................................................................115
CONTENTS
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5.4.8
5.5
Precaution measures for various temperature conditions....................................................................116
Optional equipment...............................................................................................................................118
6
TOWING AND TRANSPORTING.................................................................................................................. 122
6.1
Towing.................................................................................................................................................. 122
6.2
Transporting......................................................................................................................................... 126
7
Lowering loader arms........................................................................................................................ 133
8
Relieving RESIDUAL PRESSURE IN THE HYDRAULIC SYSTEM......................................................... 134
9
SECURING THE LOADER............................................................................................................................ 137
10
SERVICING AND INSPECTION.................................................................................................................... 138
10.1
Basic safety instructions for servicing and inspection......................................................................... 138
10.2
Servicing and inspection intervals....................................................................................................... 146
10.3
Lubrication schedule............................................................................................................................ 158
10.4
Cleaning the loader.............................................................................................................................. 160
10.5
General safety check........................................................................................................................... 162
10.6
Specifications and filling quantities...................................................................................................... 163
10.7
Maintenance and inspection work....................................................................................................... 164
10.7.1 Preparation for maintenance and inspection work.............................................................................. 164
10.7.2 Servicing the engine............................................................................................................................ 169
10.7.3 Servicing the fuel system..................................................................................................................... 175
10.7.4 Servicing the air filter system............................................................................................................... 179
10.7.5 Servicing the cooling system............................................................................................................... 182
5
6
CONTENTS
10.7.6
10.7.7
10.7.8
10.7.9
10.7.10
10.7.11
10.7.12
10.8
10.9
Servicing the hydraulic system............................................................................................................ 188
Servicing the axles.............................................................................................................................. 197
Servicing the brakes............................................................................................................................ 201
Servicing the tires and wheels............................................................................................................. 204
Servicing the cab vent filter.................................................................................................................. 208
Servicing the air conditioning system.................................................................................................. 209
Servicing the electrical system............................................................................................................ 210
Jump-starting / emergency starting..................................................................................................... 218
Loader storage..................................................................................................................................... 221
11
Troubleshooting and emergency maintenance....................................................................... 224
12
Safety instructions for repairs.................................................................................................... 228
12.1
General safety regulations for repairs.................................................................................................. 228
12.2
Engine.................................................................................................................................................. 231
12.3
Welding work....................................................................................................................................... 231
12.4
Hydraulic system.................................................................................................................................. 233
12.5
Brakes.................................................................................................................................................. 233
13
FINAL SHUTDOWN OF THE LOADER / DECOMMISSIONING.................................................................. 234
14
Appendix..................................................................................................................................................... 236
14.1
Ordering replacement parts................................................................................................................. 236
14.2
Inspection verification.......................................................................................................................... 238
Index
............................................................................................................................................................. 242
List of figures....................................................................................................................................................... 246
WL50
P R E FA C E
PREFACE
This Operator’s Manual describes how to operate and
service the loader. It provides operating and maintenance
personnel with the necessary knowledge of the loader‘s
functional characteristics in order to allow them to operate,
diagnose, maintain and repair the loader safely.
Observing the specifications in this Operator’s Manual assures:
• proper, safe, professional operation of the loader
• professional service, cleaning and care of the loader
Observe the applicable OSHA 1910 and 1926 safety regulations when they apply to the user.
If required, the user/operator should supplement the Operator’s Manual with instructions and regulations regarding
environmental protection and national regulations relating
to accident prevention.
The Operator’s Manual must always be located in
the loader or at the place where it is being used.
All persons involved in work on or with the loader must
read and apply this Operator’s Manual, for example with
regard to:
• operation, including setup, maintenance during operation, care, disposal of auxiliary materials and operating
materials as well as disposal of the entire loader.
• maintenance (inspection, servicing, care).
• transport.
This Operator’s Manual is not designed for purposes of extensive maintenance work. Such work
must be performed by approved professionals.
Should you have questions about this Operator’s Manual, please contact your dealer or visit us at www.wackerneuson.
com.
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8
B A S I C I N F O R M AT I O N
1
BASIC INFORMATION
Each new user must be instructed before using the loader
for the first time.
Instructions for using the Operator’s Manual:
• Read the Operator’s Manual carefully before starting
up the loader
• Observe all the safety instructions
• Follow the regulations and laws applicable at the place
of use
• Keep the Operator’s Manual in the protected compartment provided in the operator station/cab.
If it is not possible to rule out hazards to persons or material
during work according to the loader‘s intended use, these
hazards will be indicated by means of safety labels.
Instructions relate to the direction of travel of the loader;
this means that, when directional information is given, it
can be assumed that this refers to the direction of travel
of the loader.
B A S I C I N F O R M AT I O N
WL50
1.1
9
Notes about this Operator’s Manual
The specifications, illustrations, weight information and
technical data are not binding and correspond to the state
of the art at the time of printing. We must reserve the right
to make changes without prior notice in the area of design,
configuration, appearance and technology on account of
the ongoing further development of the products.
Contact your dealer for clarification of use and/or instructions concerning intended use and attachments identified
in this Operator’s Manual.
Always strictly observe the safety instructions in this Operator’s Manual and the legal and trade association regulations
at the usage location.
This Manual provides information and procedures to safely
operate and maintain this Wheel Loader. For your own safety
and to reduce the risk of injury, carefully read, understand,
and observe all instructions described in this Manual.
Wacker Neuson Corporation expressly reserves the right
to make technical modifications, even without notice, which
improve the performance or safety standards of its machines. The information contained in this manual is based
on machines manufactured up until the time of publication.
Wacker Neuson Corporation reserves the right to change
any portion of this information without notice.
10
B A S I C I N F O R M AT I O N
1.2 Explanation of the symbols used in this Operator’s Manual
To ensure safe operation and maintenance of the wheel
loader, it is necessary that you follow all the instructions in
this Operator’s Manual.
The following symbols and the signal words DANGER,
WARNING, CAUTION, NOTICE, and NOTE, and the adjacent text, indicate hazards and instructions.
This is the safety alert symbol. It is used to alert you
to potential personal hazards.
►► Obey all safety messages that follow this symbol.
DANGER
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
►► Obey all safety messages that follow this symbol to
avoid injury or death.
WARNING
WARNING indicates a hazardous situation which, if
not avoided, could result in death or serious injury.
►► Obey all safety messages that follow this symbol to
avoid possible injury or death.
CAUTION
CAUTION indicates a hazardous situation which, if
not avoided, could result in minor or moderate injury.
►► Obey all safety messages that follow this symbol to
avoid possible minor or moderate injury.
NOTICE: Used without the safety alert symbol, NOTICE indicates a situation which, if not avoided, could
result in property damage.
Note: Contains additional information important to a
procedure.
Important general instructions
ENVIRONMENTAL NOTE
Important general instructions for environmental
protection
B A S I C I N F O R M AT I O N
WL50
1.3 Warranty and liability
The manufacturer/supplier is not liable for damage
resulting from unintended use. The operator/user
is the sole bearer of this risk.
The Operator’s Manual must always be located in
the loader or at the place where it is being used.
Place the Operator’s Manual in the document pocket at the rear of the operator‘s platform.
Observe the following points:
• Do not make any changes to the wheel loader.
• Use only Wacker Neuson- approved attachments for
your loader.
• The loader many only be started up, operated and serviced as described in the Operator’s Manual.
• Use the loader only if all the safety and protection devices are intact.
• Observe the monitoring systems during operation.
• Repairs may only be performed by trained professionals.
• Follow the Operator’s Manual exactly.
Fig. 1
Document pocket
11
12
B A S I C I N F O R M AT I O N
1.4 Intended use
Unintended use can endanger the lives of operating
personnel or other persons and cause injuries or
extensive material damage.
The loader has been built according to applicable standards
and regulations. Operation by inexperienced persons, or in
an unintended manner, can result in hazards that can lead
to personal risk and subsequent harm to the operator and
persons in the operating area of the wheel loader. Improper
use can damage the wheel loader as well as property in the
vicinity of operation.
Read and understand the operating instructions in this Manual before operating this wheel loader. Before performing
production work, the operator should find a remote site to
become familiar with the controls and machine response.
The machine shall be in serviceable condition before attempting to use it as described in the operating instructions.
If the wheel loader is determined not to be in serviceable
condition, notify the site or machine supervisor to have it
repaired before use.
The loader is used to dislodge and load material by moving
the loader forward, taking into account the safety instructions
/ regulations and time periods listed by Wacker Neuson in
the Operator’s Manual. One work cycle consists of picking
up, lifting, transporting and unloading the material.
Similar uses of the loader with alternative attachments which
do not change the safety requirements for the loader but
modify the way in which it is used are only acceptable when
attachments that have been expressly approved by Wacker
Neuson are employed. Special conditions apply if you use
optional Wacker Neuson attachments.
The intended operation is described in this Operator’s
Manual. The instructions describe how to operate, maintain, inspect and adjust the wheel loader safely. The repair
manual provides additional instruction for safely diagnosing
malfunctions and repairing the wheel loader to maintain
service and performance levels.
WL50
The wheel loader shall not be employed for any of the following work activities:
• lifting or transporting people
• using it as a working platform
• using it to lift or transport loads without providing work
equipment for it
• pulling trailer loads
• operating after the machine has received unauthorized
repairs
• operating with unauthorized modifications
B A S I C I N F O R M AT I O N
13
14
BASIC SAFET Y INSTRUCTIONS
2
BASIC SAFETY INSTRUCTIONS
This Wheel Loader is equipped with a Starter Lock
/ Drive Lock which must be kept operational.
• Use the loader and attachments only as intended and
in serviceable condition.
• Observe the operating instructions described in this
Operator’s Manual and all applicable work site safety
regulations.
• Observe the permissible payloads.
• Wheel Loaders may only be used on suitable terrain.
WL50
BASIC SAFET Y INSTRUCTIONS
15
2.1 Organizational measures
The following safety instructions are directed at the operator
/ user of the loader.
• Always keep the Operator’s Manual in the compartment
provided for it.
• As a supplement to the Operator’s Manual, universally
valid legal and other binding regulations relating to road
traffic, compulsory coverage, accident prevention and
environmental protection must be observed, and users
must be instructed to observe them. This applies in particular to the maximum speed, depending on the model
and the permissible total weight of the loader.
• If required, instruct that personal protective equipment be
worn. This applies particularly to the handling of harmful
substances at the location of use.
• Supplement the Operator’s Manual with instructions,
including supervisory and reporting requirements, taking
into account differences between various companies,
e.g. with regard to the organization of work, work processes or personnel used.
• Personnel who have been assigned to operate the loader
must have read the Operator’s Manual before operating
the wheel loader especially the chapter Basic Safety
Instructions.
• Observe all safety messages on the loader and in the
Operator’s Manual.
• Make sure that all safety messages on the machine
are legible.
• If the loader becomes unserviceable, stop operating and
inform the supervisor that the wheel loader is not functioning normally. Alternately, contact a trained technician
to diagnose and correct the condition before resuming
operation.
• No modifications shall be made to the wheel loader.
Contact your Wacker Neuson dealer for specific advice
regarding the use of the wheel loader and approved
attachments.
16
BASIC SAFET Y INSTRUCTIONS
• If worn or damaged parts need replacement, use only
Wacker Neuson replacement parts to ensure optimum
performance and safety.
• Inspect hydraulic hoses and fittings prior to the start of
each work shift. Correct any observed leaks or abrasion
issues before operating the machine. Extended environmental exposure can cause undetectable damage.
Replace hose assemblies periodically as advised in the
maintenance schedule.
• Thoroughly inspect the wheel loader before each operating shift.
• The Wheel Loader Repair Manual describes the special
tools, diagnosis techniques, repair sequence procedures, lifting and supporting devices needed to repair this
machine. To avoid unnecessary hazards and possible
damage to the Wheel Loader, do not attempt to repair
this machine without complying with the instructions in
the Repair Manual.
• Make the location and means of operation of the fire
extinguishers known, and consider the options for fire
detection and fighting.
• A Falling Object Protection System (FOPS) is available
for the Wheel Loader Operator Protection System. OSHA
and MSHA require this protection when operating with
overhead hazards. Contact your Wacker Neuson dealer
for advice and availability of a certified FOPS.
BASIC SAFET Y INSTRUCTIONS
WL50
17
2.2 Selection and qualification of personnel / basic duties
• The operator of the wheel loader must be qualified to
operate the machine through demonstration of comprehension of the operating instructions. No one shall
operate the wheel loader if impaired due to intoxication
or drug reaction.
• Diagnosis and repair of the wheel loader shall be performed by trained competent technicians unimpaired by
intoxication or drug reaction.
• Prohibit unauthorized and untrained people from access
to the starting key and operation of the wheel loader.
• The wheel loader operator is responsible for visually
monitoring the work area of the wheel loader and preventing anyone from entering the area without permission. If a person enters the area while the wheel loader
is in operation, the operator shall stop the wheel loader
and instruct the person to leave the work area until the
wheel loader has been stopped in a safe mode. The
person may then approach the machine in full view of
the operator.
• Personnel being trained, educated, instructed or participating in a general training program may only work on
or with the machine under constant supervision of an
experienced, authorized supervisor.
• Work on the machine‘s electrical equipment may only be
performed by an electrician or by trained persons under
the direction and supervision of an electrician.
• Work on the chassis, brakes and steering system may
only be performed by trained, specialized personnel.
• Only trained, specialized personnel with specific knowledge of and experience in hydraulics may work on hydraulic units.
18
BASIC SAFET Y INSTRUCTIONS
2.3 Safety instructions for certain operating phases
The safety instructions are directed at all persons involved
in work on or with the loader.
2.3.1 Safety instructions for normal operation
• Refrain from any measures that could put safety into
question.
• Before starting work, familiarize yourself with the working
environment in which you will be using the loader. The
working environment includes, for example, obstacles in
the working and traffic area, the bearing capacity of the
ground and the necessary safeguarding of the location
to allow it to be used as a public traffic area.
• Take precautions to ensure that the loader is operated
only in a safe, serviceable state.
• Only operate the loader if all the protection devices and
safety devices, e.g. detachable protection devices, sound
absorbers and exhaust equipment, are serviceable and
operational.
• Check the loader at least once a day for visible defects.
• If the wheel loader does not respond as expected to the
operator command or exhibits a malfunction, stop the
machine, contact the supervisor and restore the machine
to serviceable condition before resuming operation.
• Start and operate the loader only from the operator’s
seat.
• When switching on and off, observe the indicator displays in accordance with the Operator’s Manual.
• Make sure no one is located in the operating area of the
loader before starting the engine.
• After starting the engine and confirming that the indicators are responding correctly, activate the steering,
brakes, lights, signals and loader/accessory functions
to confirm that these devices are responding correctly
to the control command.
• To avoid damage to the wheel loader, position the loader
bucket or accessories before moving the machine. Reconfirm that there are no people in the work or travel
area before moving the machine.
WL50
• When driving on public roads, lanes and squares, observe the valid road traffic regulations and put the loader
into a condition permissible for the road beforehand.
• As a matter of principle, turn on the lights when traveling on public roads to increase awareness for road
traffic..
• When driving through underpasses, gates, bridges, tunnels, overhead lines, etc., always make sure that you
have enough clearance above and on both sides and a
sufficient safety margin.
• Always keep sufficient distance away from excavations,
embankments and the edges of piled up material.
• Refrain from any method of operation that could adversely affect the loader‘s stability. This also includes
the duty to pass on information regarding the approved
carrying capacity (=payload) for the relevant loader attachments. (carrying capacity / approved payload are
specified in the Operator’s Manual)
BASIC SAFET Y INSTRUCTIONS
19
• Do not drive transversely on slopes; always keep work
equipment and load near the ground, especially when
driving down slopes.
• When driving down a slope, always adjust your driving speed to take account of the respective conditions.
Always reduce your speed before reaching a downhill
slope, and not after you have reached it.
• The load must be located on the uphill side during driving on downhill or uphill slopes.
• As a matter of principle, always secure the loader from
accidentally rolling away and against unauthorized use.
Turn off the engine, put on the parking brake, lower the
work equipment, remove the starting key and, if necessary, employ a wheel chock.
20
BASIC SAFET Y INSTRUCTIONS
2.3.2 Safety instructions for other operating modes
These safety instructions refer to special tasks relating to the
use of the loader and servicing tasks - as well as emergency
maintenance during operation or work concerning disposal
of the auxiliary and operating materials.
• The Operator’s Manual provides adjustment, maintenance and inspection information and schedules in
subsequent sections. This information is essential to
ensuring peak performance satisfaction and safety over
the life of the wheel loader.
• This Operator’s Manual provides routine adjustment
and maintenance procedures in addition to operating
instructions. Diagnosis and repair of the wheel loader
requires special skill, training and tools. Your Wacker
Neuson dealer has the trained technicians to perform
such work safely and effectively.
• Maintenance and repair work shall be performed by
operators and technicians trained and knowledgeable
of the wheel loader function and attachments.
• Do not attempt to perform maintenance or repair on the
wheel loader until the machine and engine is stopped and
all attachments are in a stable position. Do not attempt to
perform maintenance or repair work on hot surfaces or
components of the machine. Read and understand the
procedure for maintenance and repair in the Operator’s
and Repair Manuals for this wheel loader.
• Secure the maintenance area, allowing as large a space
as required.
• If the loader is being completely shut off during servicing
and maintenance work, please observe the following
(see the chapter »Securing the Loader«):
--Secure the loader from being accidentally turned back
on by removing the starting key.
--Attach a warning note to indicate that the loader is being worked on.
--Only perform servicing and maintenance work if the
loader is parked on an even, hard surface and secured
from rolling away and articulating at the steering swivel
point..
--Before performing work with the loader arms raised,
install the support provided to prevent the loader arms
from lowering suddenly and inadvertently.
--This device shall conform to ISO 10533.
WL50
• Use lifting devices to raise and support parts and assemblies exceeding 10 kg (22 lbs) weight during repair
and replacement activity. Use only OSHA approved
devices to perform the lifting operation and verify that
the lifting devices are in serviceable condition.
• The use of a crane to lift heavy assemblies or components requires that the operator is certified by OSHA.
The person attaching the load and signaling the operator
must be trained in proper techniques as well as voice
and hand signals to instruct the crane operator.
• For assembly above head height, use only climbing aids
and working platforms which are intended for this purpose, or which are safe for use in this situation. Do not
use machine parts as climbing aids. Keep all handles,
steps, pedestals, platforms and ladders free of dirt, snow
and ice.
BASIC SAFET Y INSTRUCTIONS
21
• Clean the entire loader, especially the connections
and threaded connections, with oil, fuel or care products when beginning maintenance and servicing work.
Use lint-free cleaning rags and no aggressive cleaning
agents.
• Before cleaning the loader with water or by steam jet
(high-pressure cleaner) or with other cleaning agents,
cover up / seal off all the openings into which water,
steam and cleaning agents are not permitted to enter.
Electrical components, inlets and outlets for the engine‘s
combustion air and reservoir openings are particularly
at risk. Completely remove the covers / seals after you
have finished cleaning.
• Before restarting, retighten any threaded connections
loosened during servicing and repairs, in particular for oil
or fuel lines. When performing maintenance and servicing work, check all the lines and threaded connections
for leaks and tight fit.
22
BASIC SAFET Y INSTRUCTIONS
• Should it be necessary to remove safety devices during
setup, servicing or repairs, reinstall and check the safety
devices immediately after finishing the work and verify
that the devices perform correctly.
• Replace the ROPS (Roll Over Protective Structure) or
FOPS structure if it is permanently deflected, a member
is deformed, it has become corroded, and/or it has been
modified. If the mounting structure, base, or mounting
hardware is damaged, consult your Wacker Neuson
dealer for assistance. Do not attempt to repair, straighten
or reuse a damaged ROPS or FOPS.
• Responsibly dispose of the unwanted materials and
fluids resulting from the repair. Hazardous material shall
be disposed in a hazardous material container(s). Parts
and assemblies can be recycled.
ROPS / FOPS - protective structures
WARNING
Never use the machine without the ROPS/FOPS
properly installed.
►► Do not drill, weld, straighten, or bend the ROPS
/ FOPS protective structures.
►► Allow only trained authorized personnel to install
new ROPS / FOPS structures.
BASIC SAFET Y INSTRUCTIONS
WL50
2.4 Safety instructions for particular hazards
2.4.1 Forklift attachment
WARNING
Personal injury hazard.
Falling objects can strike the operator.
►► Do not transport large bales or packaged goods
without a FOPS (operator canopy or cabin).
►► Ensure that large loads are properly secured
and supported. See ANSI B56.1, OSHA1910
and OSHA1926 for regulations on carrying material.
►► Do not stack load higher than fork restraint.
Fig. 2
Transport of large
bales or packaged
goods
23
24
BASIC SAFET Y INSTRUCTIONS
2.4.2 Working near overhead power lines
WARNING
Electric shock hazard.
The operator of the Wheel Loader can be killed if
the Wheel Loader comes in contact with electrical
wires.
►► Keep the loader and attachment tools at a sufficient distance from overhead power lines and
other electrical lines of more than 50 V (see
table below).
Nominal voltage
Clearance distance
up to 1000 V
1m
3.3 ft
over 1 kV up to 110 kV
3m
9.8 ft
over 110 kV up to 220 kV
4m
13 ft
over 220 kV up to 380 kV
5m
16.4 ft
Unknown nominal voltage
5m
16.4 ft
If inadvertent contact with a live electric source occurs:
• Do not leave the loader until the electricity has been
disconnected and a qualified technician directs the operator to leave the machine..
• If feasible, drive the loader away from the danger
area!
• Warn any people around the loader not to get any nearer
and not to touch the machine.
• Arrange to have the power turned off.
WL50
2.4.3 Electrical power
• Regularly check the loader‘s electrical equipment. Defects, such as loose plug connections or cables with
burnt insulation, shall be replaced before resuming operation.
• If an electrical malfunction is discovered, stop the wheel
loader in a safe location, lower the loader arms and attachment to the ground and stop the engine. Contact
the supervisor for diagnosis and repair by a qualified
technician before resuming operation.
• Replacement fuses shall be of the same type and capacity as specified by the manufacturer in the Operator’s
and Repair Manuals. Do not attempt to bypass a fused
system to resume operation.
BASIC SAFET Y INSTRUCTIONS
2.4.4 Flying sparks / fire danger
WARNING
Fire hazard.
Sparks from the exhaust, or electrical equipment,
or hot machine parts can ignite explosions and
fires.
►► Do not work in enclosed spaces where flammable materials, explosive vapors, or combustible dust are found.
►► Stay clear of flammable materials such as hay
and straw.
►► Park the Wheel Loader only in areas free of
flammable materials.
25
26
BASIC SAFET Y INSTRUCTIONS
2.4.5 Gas, dust, steam, smoke
2.4.6 Hydraulics, pneumatics
• Diesel engine exhaust emissions are toxic in concentrated amounts. Do not operate the wheel loader in enclosed spaces or inadequately ventilated spaces.
• Determine and follow regulations regarding safe operation at the specific work site.
• When detected, oil leaks shall be repaired to avoid:
--Do not operate the wheel loader near open flames.
--Do not perform welding repairs in explosive atmospheres.
--Do not weld fuel reservoirs or fuel system components.
--Do not perform any welding operation unless qualified
to do so.
• Wear appropriate personal protective equipment (breathing filter, protective suit) for protection against specific
dangers, e.g. poisonous gases, corrosive steam, poisonous (i.e. containing toxins) surroundings, etc.
--environmental hazards
--fire hazards
--slip hazards
--explosion hazards
--personal injury hazards.
• Do not attempt to repair a hydraulic system or component
until the hydraulic pressure has been relieved. Relieve
the pressure by activating controls as advised in this
Operator’s Manual or the Repair Manual.
• Replace hydraulic lines and fittings with original equipment parts from your Wacker Neuson dealer to assure
original performance and safety. The reinstalled hydraulic line routing and attachment shall conform to the
original routing. Confirm that the replacement routing
is not interfering with other parts, chafing across sharp
surfaces or resting on or near hot surfaces.
BASIC SAFET Y INSTRUCTIONS
WL50
2.4.7 Tip-overs
WARNING
Personal injury hazard.
Falling Loader can strike or crush the operator.
►► Do not operate the wheel loader without fastening the seat belt.
►► Keep the loader lift arms and attachment as low
as practical when traveling.
If the machine tips over, or in the event of an extreme slope condition, take the following steps to
avoid engine damage:
►► Stop the engine as quickly as practical to avoid
damage from lubrication starvation.
►► Do not operate the engine or machine after an
incident until a technician has inspected and
corrected any damage resulting from the incident.
2.4.8 Noise
• All the loader‘s sound-proofing devices must be in their
protection position during operation.
• If necessary, the operator must wear personal hearing
protection.
2.4.9 Oils, grease and other chemical substances
• Observe the valid safety regulations for the respective
product when handling oil, grease and other chemical
substances.
• Do not service the wheel loader immediately after operation. Wait until hot surfaces have cooled and can be
touched comfortably.
• Smoking and open flames are prohibited during fueling.
Danger of fire or explosion!
NOTICE
Use the appropriate fuel for climate temperature
ranges to avoid engine stoppage from fuel gelling.
27
28
BASIC SAFET Y INSTRUCTIONS
2.5 Transporting and towing / restarting
2.6 Final decommissioning / dismantling
• Instructions are provided in this Operator’s Manual for
towing, loading and transporting the wheel loader safely
without machine damage.
• The towing machine shall be capable of towing the wheel
loader.
• The loading and transport equipment shall be appropriate to safely complete the sequence of operation. If the
wheel loader is to be lifted by a crane device, consult
the machine specifications to select the correct crane
capacity and OSHA lifting devices to safely complete
the lifting operation.
• Only restart the loader according to the Operator’s
Manual.
• See Chapter 6 for complete transporting and towing
instructions.
• Drain and dispose of all fluids in suitable containers and
dispose of the fluids in an environmentally responsible
manner. Do not dispose in sewers, streams, lakes or
on the ground.
• Remove the battery and dispose of it at an authorized
recycling center. Remove the starting motor to disable
the engine.
• Dismantle and recycle the components according to the
material instructions on the individual parts. Tires and
rubber based parts can be recycled separately.
BASIC SAFET Y INSTRUCTIONS
WL50
2.7 Safety labels used
Maintain all safety message labels on the machine
in a legible manner. If a safety label becomes damaged or illegible, replace it with a new label available from your Wacker Neuson dealer or at www.
wackerneuson.com.
6
13
8
1
5
16
2
7
12
11
15
3
9
14
10
Fig. 3
Location of the
Safety labels
29
30
BASIC SAFET Y INSTRUCTIONS
Safety label 1
Safety label 3
Warning
Warning
Do not stand near the loader during
operation.
Do not go under the loader lift arms
when raised.
Personal injury hazard from falling
equipment.
Never stand in the unsecured danger
area.
Use the safety supports.
Safety label 2
Safety label 4
Shearing hazard
Warning
Shearing hazard from rotating fan. Stop
the engine before entering the area.
Personal injury hazard. The rollover bar
should always be locked in protection
position, insofar as this is possible given
the working conditions.
BASIC SAFET Y INSTRUCTIONS
WL50
Safety label 5
Safety label 7
Important
Warning
Remove the starting key and read the
Repair Manual before proceeding with
any work activity on the wheel loader.
Hot surfaces can cause burns.
Do not touch hot surfaces.
Safety label 6
Safety label 8
Important
Warning
Lubricate the center joint daily before
beginning work. Refer to your Operator’s Manual for more information.
Personal injury hazard.
Never lift or transport people with the
lifting attachment.
31
32
BASIC SAFET Y INSTRUCTIONS
Safety label 9
Safety label 11
Warning
Warning
Personal injury hazard. Always wear
the seat belt while operating the wheel
loader.
Pinching/crushing hazard. Avoid the articulation area while the Wheel Loader
is in operation. Before working in the
articulation area and before transporting, secure the articulation pivot. Refer
to Operator’s Manual.
Safety label 10
Safety label 12
Warning
Warning
Personal injury hazard.
Never transport passengers on the
Wheel Loader.
Personal injury hazard.
The Wheel Loader can injure people
on the work site who are in the danger
zone.
Keep personnel away from the Wheel
Loader during operation!
BASIC SAFET Y INSTRUCTIONS
WL50
Safety label 13
Label 15
Warning
Possibility of equipment
damage
If the ROPS / FOPS protective structures are damaged,
they can not serve their protective function.
Never drill or weld the ROPS / FOPS protective structures.
Refer to Operator’s Manual.
15 PSI
1 BAR
Close both doors before tilting the cab.
Safety label 14
Safety label 16
Warning
Warning
Hot liquids or steam escaping under pressure can cause burns.
Do not open radiator when it is hot. Refer to Operator’s Manual.
33
NICHT UNTER LAST schalten
Do not operate under load
Ne pas changer de vitesse sous charge
Quitar la presión antes de cambiar
Personal injury hazard.
Falling attachments can
strike people in the dangerous area.
Always switch the three-way
valve to hydraulic connection as soon as the attachment is locked.
34
BASIC SAFET Y INSTRUCTIONS
2.8 Safety devices
2.8.1 Fire extinguisher
A fire extinguisher can be installed to operator cab rail to
the right of the operator ‘s seat. (Fig. 4).
Fig. 4
Fire extinguisher
2.8.2 Rotating beacon
(Optional equipment)
Use the yellow rotating beacon according to local
regulations.
The receptacle for the rotating beacon can be attached to
the operator cab roof in the back (Fig. 5).
To switch the rotating beacon on and off, see the chapter
»Switches / rocker switches«.
Fig. 5
Attaching the rotating beacon
BASIC SAFET Y INSTRUCTIONS
WL50
2.8.3 Seat belt
Before starting the engine:
• adjust the seat to provide comfortable access
to all control ranges.
• examine the seat belt webbing for any mechanical or chemical damage and replace if necessary.
• inspect all seat belt hardware for functionality and serviceability, repairing or replacing if
necessary.
• fasten the seat belt and adjust to contact the
lower torso firmly.
When not in use:
• store the seat belt by placing it across the seat
pad.
• ensure that the seat belt retractors work freely.
Fig. 6
Seat belt
35
36
BASIC SAFET Y INSTRUCTIONS
2.8.4 Emergency exit
The cab door on the left side of the machine facing the forward direction of travel is the primary
access system to the operator station. The right
hand access is a secondary opening intended for
emergency use only.
2.8.5 Backup alarm for reverse drive
(Optional equipment)
A backup alarm sounds when reverse gear is engaged.
The sound is to warn persons who are in the vicinity of the
loader that the loader is going into reverse.
Fig. 7
Emergency exit
BASIC SAFET Y INSTRUCTIONS
WL50
2.8.6 Battery disconnect switch
After removing the disconnect switch key, place the
attached cover over the key opening to prevent dirt
and water from entering the switch.
To connect the battery to the electrical system,
remove the cover, insert the key and rotate the key
clockwise. To avoid inadvertent control behavior,
do not disconnect the battery from the electrical
system with the engine running or any electrical
systems activated.
Disconnect the battery from the electrical system by rotating
the key counter-clockwise. In an emergency, the disconnect switch can be used to disconnect the battery from
the electrical system. Disconnecting the battery from the
electrical system will reduce the possibility of discharge
before the next use. Also, disconnecting the battery from
the electrical system and removing the key is a means of
resisting machine theft.
Fig. 8
Battery disconnect
switch
• Turn the switch lever counter-clockwise:
–– The battery is disconnected from the electrical system
• Turn the switch lever clockwise:
–– The battery is connected to the electrical system.
37
38
BASIC SAFET Y INSTRUCTIONS
2.8.7 Loader lift arm locking system
CAUTION
Possibility of inadvertent loader lift arm activation.
Inadvertent activation can result in the loader arms
dropping causing the bucket or attachment to engage the road surface. This can result in loss of
machine control with possible injury to the operator
and other work site persons.
►► Always lock the loader lift arm control to prevent
inadvertent activation during travel.
►► The operator shall not leave the operator seat
until the loader arms and attachment have been
lowered to and are resting on the ground.
The loader lift arms can be secured against unintentional operation with an arrest.
When the arrest is switched on, the control lamp in
the switch lights up (Fig. 9), and the loader lift arms
will not move if the loader controls are moved.
Fig. 9
Switch for loader lift
arms lock
Activate the loader lift arms locking system by switching the
rocker switch (Fig. 9).
• Switch the rocker switch (Fig. 9) to position 1:
–– The locking system is switched on.
• Switch the rocker switch (Fig. 9) to position 0:
–– The locking system is switched off.
TECHNICAL DATA
WL50
3
39
TECHNICAL DATA
3.1 Technical description
Brakes
The loader consists of the vehicle frame, the drive and the
axles. The vehicle frame contains all the drive and control
units for the standard configuration. The vehicle frame consists of the front carriage with the loader lift arms, and the
rear carriage, in which the drive unit is situated. They are
connected by an articulated swivel joint.
Service braking is provided by the propulsion hydraulic
system through the transfer gearbox and driveshaft to both
axles. The braking-inching pedal provides a secondary service brake by contacting a hub-mounted differential in the
transfer gear box. A separate parking brake with separate
control is provided that engages the differential hub in the
transfer gear box.
Drive
The loader is driven by a diesel engine, which powers the
steering and working hydraulics and the driving hydraulics.
The propulsion hydraulics provide power to the transfer
gear box by a directly attached hydraulic motor. The rear
axle is integral with the transfer gear box. The front axle is
powered by a driveshaft connecting the transfer gear box
to the front axle.
The axles are designed as rigid axles.
Steering
The fully hydraulic articulated swivel steering system operates via a dual action cylinder.
40
TECHNICAL DATA
Hydraulics
The loader has two hydraulic systems supplied by a hydraulic fluid reservoir:
- hydrostatic drive
- steering and working hydraulics
The hydrostatic drive consists of an axial piston variable
displacement pump, which drives an axial piston motor. The
axial piston variable displacement pump is rigid coupled
directly to the diesel engine, while the axial piston motor is
directly coupled to the transfer case.
Displacement is automatic and continuous, but depends on
speed and load. The travel speed depends on the engine
speed and the machine load. Operating speed is set by
the accelerator pedal position, engine speed and torque
demand of the loading operation. Depending on load, the
variable displacement pump automatically adjusts pump
displacement to balance torque and speed requirements
within the power capability of the diesel engine. Since the
input power is limited to the diesel engine output, increased
demands from traversing a grade or loading the bucket will
result in speed reduction which increases the torque to meet
the performance demand. This adjustment control allows
the entire range of performance to be utilized optimally.
Actuating the inching pedal is an override control that can
reduce wheel loader speed as operation demands. Depressing the pedal to the full range will stop the travel motion
of the wheel loader. The inching pedal permits an infinite
number of control positions. The inching pedal provides the
service brake function by destroking the pump until no fluid
is transmitted between the pump and motor.
A gear hydraulic pump supplies the steering and working
hydraulics with oil. The gear pump is rigid coupled to the
drive‘s variable displacement pump. Pump flow output is
directly proportional to the diesel engine speed.
The hydraulic system is equipped with relief valves, filters
and oil coolers.
TECHNICAL DATA
WL50
Electrical system
3.2 Loader data
The electrical system operates at 12 volts and the electrical
circuits are protected by fuses to prevent overload damage
to the system and its components.
Engine
Equipment
The loading equipment consists of the loader lift arms with
an integrated mechanical or hydraulic quick-change receptacle, lifting and tipping cylinders and the appropriate
attachments.
The loader is equipped with a rollover protective structure
(ROPS).
Manufacturer
Deutz
Model
4-cylinder turbo diesel engine
Type
TD 2011 L04 w
Capacity
3619 cm³ (221 inch³)
Cooling
Water-cooled
Output
58 kW / 78 hp at 2300 rpm
SAE rating according to ISO9249
Steering
Fully hydraulic center-pivot steering
Rotating angle
12°
Turn angle
44°
Drive (driving speed)
1. gear
0 – 7 km/h
0 – 4.35 mph
2. gear
0 – 20 km/h
0 – 12.43 mph
41
42
TECHNICAL DATA
Hydraulics
Vibrations (weighted effective value)
Driving hydraulics
Upper extremities
no more than
2.50 m/s²
8.19 ft/s²
Feet or seat surface
no more than
0.80 m/s²
2.64 ft/s²
Flow rate
129 l/min
34 gallons/min
Working pressure
445 bar
6454 psi
Flow rate
64 l/min
17 gallons/min
Average LwA measured at the operator‘s ear
98.9 dB(A)
Working pressure
230 bar
3336 psi
Guaranteed LwA measured at the operator‘s
ear
100 dB(A)
Flow rate
64 l/min
17 gallons/min
Specified LpA measured at the operator‘s ear
75 dB(A)
Working pressure
190 bar
2756 psi
Working hydraulics
Noise values
Steering hydraulics
Electrical system
Weight specifications
Operating weight
4835 kg
10659 lb
Permissible total weight
5680 kg
12522 lb
Working voltage
12 volts
Permissible axle load per axle
4260 kg
9391 lb
Battery
77 Ah
Permissible payload with shovel
1263 kg
2784 lb
Permissible payload with pallet fork
1270 kg
2800 lb
TECHNICAL DATA
WL50
3.3 Product identification number plates
A product identification number plate is attached to the
loader on the right side of the front carriage (Fig. 10).
Fig. 10
Vehicle ID
It lists the following information:
•
•
•
•
•
•
•
•
Manufacturer
Year built
Vehicle ID
Type
Engine power
Axle loads
Operating weight
Permissible total weight
In addition, the vehicle ID is engraved on the right side of
the rear end near the entry area (Fig. 10/1).
1
Furthermore, the following loader components each have
their own rating plate:
• The diesel engine
• The axial piston variable displacement pump (hydraulic
transmission pump)
• The oil engines (hydraulic traction motor)
• The axles.
43
44
TECHNICAL DATA
3.4 Dimensions
Fig. 11
Dimensions
TECHNICAL DATA
WL50
Dimensions with 405/70 R18 EM tires
Item Designation
Value
A
Overall length with standard
shovel
5417 mm
213.3 inch
A‘
Overall length without shovel
4545 mm
178.9 inch
B
Axle center to shovel pivotpoint
1030 mm
40.6 inch
C
Wheelbase
2005 mm
78.9 inch
D
Rear overhang
1445 mm
56.9 inch
E
Overhead loading height*
3094 mm
121.8 inch
F
Max. height of shovel pivot
point*
3336 mm
131.3 inch
G
Height of seat*
1563 mm
61.5 inch
H
Max. dumping height*
2569 mm
101.1 inch
I
Scraping depth*
50 mm
1.97 inch
K
Reach at H*
723 mm
28.5 inch
L
Height to top of cab*
2602 mm
102.4 inch
Item Designation
Value
M
Total working height*
4090 mm
N
Max. dumping angle at max.
lift height
38°
O
Reverse roll angle on ground
43°
161.0 inch
P
Reverse roll angle at max. lift
Q
Inside turning radius*
1546 mm
60.9 inch
R
Overall width*
1840 mm
72.4 inch
S
Radius at outer edge*
3449 mm
135.8 inch
T
Ground clearance*
377 mm
14.8 inch
U
Turn angle
V
Width across cab
W Track width*
Z
Maximum turning radius
(depends on shovel width)
*In the event of deviating tires or reversed wheel rims the dimensions will change
45°
44°
1251 mm
49.3 inch
1400 mm
55.1 inch
3908 mm
153.9 inch
45
46
Description of the indicator , warning and control elements
4
DESCRIPTION OF THE INDICATOR, WARNING AND CONTROL ELEMENTS
4.1 Operating elements and instruments
Fig. 12
Operating elements
1
11
2
3
4
10
9
8
7
5
6
Description of the indicator , warning and control elements
WL50
Item Designation
1
Steering wheel turning knob
2
Instrument panel
3
Steering wheel
4
Accelerator
5
Operating lever for load arm / drive
6
Operating lever for optional hydraulics
7
Operating lever for parking brake
8
Operator’s seat
9
Braking-inching pedal
10
Operating lever for adjusting the steering column
11
Operating lever for lighting, turn signals and signal horn
47
48
Description of the indicator , warning and control elements
4.2 Control and warning indicator lights
• If the indicator lights do not illuminate properly
at the starting sequence, repair the malfunction
before operating the machine.
• If an indicator light illuminates during operation,
move the machine to a safe place, lower the
loader arms and stop the engine.
• Do not operate the wheel loader until the reason
for the illuminated indicator is determined and
corrective action has been completed.
1
2
3
4
1
Immediately turn off the engine if a light marked with
this * symbol is illuminated in the adjacent table.
Fig. 13
Control and warning lights
5
6
7
8
Description of the indicator , warning and control elements
WL50
Item Designation
Function
1
Heater indicator light
Illuminates during preheating
2
Indicator light for electrical connection on loader lift
arms (optional equipment)
Illuminates when electrical connection is switched on.
3
Warning light for return filter
Illuminates if the pressure at the return filter is too high
4
No function
Available for optional equipment
5
Indicator for fuel display
Illuminates when the fuel quantity falls to approx. 5 l (1.6
gallons)
6 *
Warning light for engine temperature / hydraulic oil
temperature
Illuminates when engine temperature / hydraulic oil
temperature is too high
7
Warning light for alternator
Is illuminated if the battery is not accepting an electrical
charge
8
Indicator light for turn signal
Illuminates when a turn signal is on
Symbol
1
49
50
Description of the indicator , warning and control elements
Control and warning indicator lights
• If the indicator lights do not illuminate properly
at the starting sequence, repair the malfunction
before operating the machine.
• If an indicator light illuminates during operation,
move the machine to a safe place, lower the
loader arms and stop the engine.
• Do not operate the wheel loader until the reason
for the illuminated indicator is determined and
1
corrective action has been completed.
9
10 11 12 13 14 15 16
Immediately turn off the engine if a light marked with
this * symbol is illuminated in the adjacent table.
Fig. 13 Control and warning lights
0
1
2 3
Description of the indicator , warning and control elements
WL50
Item Designation
Function
9
Indicator light for main beam
Illuminates when the main beam is switched on
10*
Warning light for engine oil pressure
Illuminates when engine oil pressure is too low
11
Indicator light for parking brake
Illuminates when the parking brake is on
12
Air filter indicator light
Illuminates when the air filter is contaminated.
13
Indicator light for overdrive
Illuminates when overdrive is engaged
14
Indicator light for crawler gear
Illuminates when crawler gear is engaged
15
Indicator light for forward drive
Illuminates when gear is set to forward drive
16
Indicator light for reverse drive
Illuminates when gear is set to reverse drive
Symbol
51
52
Description of the indicator , warning and control elements
4.3 Indicator devices
Fig. 14
Indicator devices
Item Designation
1
Engine temperature
Shows the diesel engine‘s temperature
2
Tachometer
Shows the diesel engine‘s rpm
3
Hour meter
Adds up the loader‘s operating time.
Plan your service work and inspection
work according to the meter reading
4
Fuel gauge
Shows the fuel quantity
1
0
1
2
3
4
1
Function
2 3
Description of the indicator , warning and control elements
WL50
4.4 Switches / rotary switches
Fig. 15
Rotary switches
1
0
1
2
1
Item Designation
Function
1
Combination switch
Switches lighting and signal
horn ON/OFF
2
Rotary switch, temperature control
To adjust the temperature of
the heater fan
3
Rotary switch, heater
fan control
Switches the heater fan on/off
2 3
3
53
54
Description of the indicator , warning and control elements
4.5 Rocker switches
Fig. 16
Rocker switches 1
1
0
1
Fig. 17
Rocker switches 2
2 3
5
1 2
3 4
6
7
8
9
10
Description of the indicator , warning and control elements
WL50
Item Designation
Function
1
No function
Available for optional equipment
2
Rocker switch for hazard warning lights
Switches hazard warning lights on/off
3
Rocker switch, air conditioning system
Switches the air conditioning system on/off
(optional equipment)
4
Rocker switch, illumination system
Switches the lights for street driving on/off
5
Rocker switch, pressure relief for optional hydraulics
Switch to relieve pressure on the optional hydraulics
6
Rocker switch, float position / emergency lowering of the Switches on/off the float position of the loader lift arms
loader lift arms (needed if the loader is equipped with
for loaders with electrically unlockable lowering brake
electrically unlockable lowering brake valves)
valves
Rocker switch, special equipment for load swing dampening (second switch level)
On/off switch for the load-swing dampening
7
Rocker switch, loader lift arms arrest
Switches the loader lift arms arrest on/off
8
No function
Available for optional equipment
9
No function
Available for optional equipment
10 No function
Available for optional equipment
Symbol
55
56
Description of the indicator , warning and control elements
Rocker switches
Fig. 18
Rocker switches 3
11 12
13
14
15
16
Description of the indicator , warning and control elements
WL50
Item Designation
Function
11 Rocker switch for front headlights
Switches front headlights on/off
12 Rocker switch for rear headlights
Switches rear headlights on/off
13
Rocker switch, rear-window wiper / back washer system
(second switch level)
Switches rear window wipers and back washer system
on/off
14 Rocker switch rear window heating
Switches the rear window heater on/off
15 Rocker switch for rotating beacon
Switches rotating beacon on/off
16 No function
Available for optional equipment
Symbol
57
58
O perating and operation
5
OPERATING AND OPERATION
5.1 Before starting up
Read the Operator’s Manual before starting up the
loader.
• Only operate the loader from the operator’s
seat.
• Observe OSHA safety regulations.
• Arrange for training with an experienced operator. Practice operating the wheel loader in a
remote flat area to become familiar with control
response.
• Using this Manual as a reference, conduct
an inspection before operating the wheel
loader.
• After prolonged storage or inactivity, refer to the
procedure for preparing to operate the loader.
5.1.1
Fueling
• Lower the loader lift arms and attachment to the
ground and stop the engine to fuel the loader.
• Fire hazard – diesel fuel is flammable! Do not
smoke and avoid fire and open flames when
fueling.
• Do not use gasoline. Use only diesel fuel. Do
not add gasoline to diesel fuel.
• Diesel fuel is hazardous to your health. Wear
appropriate gloves.
• If an inadvertent incident occurs during fueling, take immediate appropriate measures to
avoid hazards. Inform the supervisor or person
responsible for the fueling operation.
O perating and operation
WL50
NOTICE
Use only clean, conventional high-grade diesel fuel
to operate the loader.
If at all possible, use a fine filter in the filling line.
ENVIRONMENTAL NOTE
Diesel fuel is hazardous to the environment.
Do not allow it to be released uncontrollably into
the environment.
Immediately soak up with binding material any fuel
that has leaked, overflowed or been spilled, and
dispose of it in an ecologically sound manner.
Immediately inform the persons responsible if fuel
has been released into the environment.
Fig. 19
Fuel filler neck
L O W S U LF U R F U EL
O R U LT R A L O W
S U LF U R F UEL O N LY
390199390
The diesel reservoir is located on the left side of the rear
of the loader. Access the reservoir‘s filler neck by opening
the engine enclosure (Fig. 19).
• Unscrew the cap from the filler neck.
• Fuel the loader‘s reservoir through the filler neck.
• Carefully replace the fuel cap on the filler neck after
fuelling.
59
60
O perating and operation
5.1.2 Operation
WARNING
Personal injury hazard.
►► Do not operate the loader if it is not in serviceable condition or responding correctly to control
commands.
►► Park the machine in a safe place, lower the
loader arms and attachment, stop the engine
and notify your supervisor.
►► Do not operate the machine until the problem
has been corrected.
►► Check that the safety devices are present and
operative each time before you start up the
loader.
►► Replace damaged tires to avoid loss of production and stability due to sudden deflation.
►► Maintain a neat uncluttered operator space to
prevent slipping, tripping and potential impediments to control movement.
►► Keep the operating elements clean.
►► Follow the daily servicing schedule.
Before entering the cab
• Check that the loader is clean and undamaged.
• Check that the handles and steps are in good condition
and clean.
• Check that the cab windows are in good condition and
clean.
• Check that all safety components are present and fully
functional.
• Check that the rods, cylinders, hinge pins and coolers
are clean.
• Check that all the fasteners, joints and hinge pins fit
tightly.
• Check that all the safety messages and instructional
labels are present and in good condition.
• Check the loader for oil, fuel and coolant leaks.
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Operator station access
Check:
•
•
•
•
•
Engine oil level
Hydraulic fluid level
Coolant level
Fuel level
Check the condition of the tires, looking for abrasion,
cuts or wear. Check the tire pressure! Ensure that the
tires are inflated to the proper pressure (see tire pressure table).
• Ensure that the engine enclosures and the caps for the
fuel reservoir and hydraulic fluid reservoir are present
and have been tightened.
WARNING
Slipping hazard.
►► Check that the handles and steps are in good
condition and clean before entering and exiting
the wheel loader control station..
►► Use the attached handles and steps.
►► Always get in and out with your face turned toward the loader.
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5.1.3 Doors and windows
CAUTION
Possibility of injury or equipment damage from unlatched cab doors.
►► Close and latch the cab doors during operation.
►► The cab doors may be latched open during operation if circumstances require.
►► Always latch both doors before operating the
wheel loader in the open or closed position.
Fig. 20
Cab door locking
mechanism
Illustration 1
outside
The cab has one door on the left and one on the right. The
right-hand door is intended for use as an emergency exit.
• Open the cab door from the outside by pulling the door
opener (Fig. 20/1).
• Open the door from the inside by pulling the unlocking
lever upwards (Fig. 20/2).
Illustration 2
inside
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Fig. 21
Window locking
mechanism
Fig. 22
Window arrest
1
The side windows can be opened and locked in this position. Open and close the side windows using the lever
(Fig. 21).
• Arrest the side window by locking it in the holder (Fig.
22).
• Activate lever Item 1 to release the window arrest (Fig.
22).
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Fig. 23
Door arrest
Fig. 24
Release door arrest
1
The doors can also be opened together with the side window
and locked in this position.
• Arrest the door by locking it in the holder (Fig. 23).
• Activate lever Item 1 to release the door arrest (Fig.
24).
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65
5.1.4 Adjusting the operator’s seat
Fig. 25
Door put-up hinges
WARNING
Personal injury or property damage hazard.
Adjusting the operator seat while the wheel loader
is in operation can cause inadvertent control movements.
►► Do not adjust the operator seat while the wheel
loader is in operation.
►► Stop the machine first and then adjust the
seat.
The doors can also be locked in a slightly open position. To
do this, flip the locking lever (Fig. 25) over.
You can adjust the operator’s seat to fit your height and
posture. This keeps your muscles relaxed and prevents
you from tiring while working.
Always check that the cab doors and windows are closed
before leaving the loader.
Adjust the seat so that you can comfortably reach the levers
and pedals with your back against the backrest.
You can adjust the seat in the following ways (Fig. 26):
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Fig. 26
Adjusting the operator’s seat
1
high
middle
low
2
1. Height adjustment:
The seat height can be adjusted to three different positions.
Lift the seat out of its lowest position until it engages in the
middle position. Lift the seat further in order to reach the
highest position. Lift the seat until it reaches the upper stop,
at which point it will return to its lowest position.
2. Armrest adjustment:
3
Adjust the inclination of the armrest when there is no load
on it by turning the adjustment wheel on its lower side.
4
5
6
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3. Lengthwise adjustment of the seat separately
from the steering console:
Adjust the seat in the lengthwise direction by pushing the
locking lever upwards. After the adjustment, the locking
lever must click into place in the desired position. The operator’s seat should not move again after it has been locked
in place.
4. Lengthwise adjustment of the seat together
with the steering console:
Adjust the seat in the lengthwise direction, together with
the steering console, by pushing the locking bar upwards.
After the adjustment, the locking bar must click into place in
the desired position. The operator’s seat should not move
again after it has been locked in place.
67
5. Weight adjustment:
Adjust the weight while sitting in the seat, by turning the
weight adjustment knob. The viewing window Fig. 26 (magnification) allows you to read off the weight set.
6. Backrest adjustment:
Use the locking lever to adjust the degree of tilt of the backrest. The locking lever should lock in the desired position.
The backrest should not move again after it has been locked
in place.
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5.1.5 Adjusting the steering column
WARNING
Personal injury or property damage hazard.
Adjusting the steering column while the wheel loader is in operation can cause inadvertent machine
movement.
►► Do not adjust the steering column while the
wheel loader is in operation.
►► Stop the machine first and then adjust the steering column.
You can adjust the position of the steering column lengthwise
so that it fits your height and posture.
1. Operate the adjustment lever (Fig. 27).
2. Adjust the steering column as needed.
3. Let go of the adjustment lever.
Fig. 27
Adjusting the steering column
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5.1.6 Seat belt
WARNING
Personal injury hazard.
Not wearing the seat belt, or operating with a damaged seat belt, can result in injury to the operator.
►► Make sure seat belt and buckle stay clean.
►► Before operation check function of seat belt
and buckle.
►► Replace the belt or buckle immediately if they
are damaged.
►► Do not operate the machine if the seat belt is
damaged or not functioning correctly.
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Buckling the seat belt
1. Sit back in the operator seat, so that your entire back is
touching the seat.
2. Place the seat belt over your lap.
3. Seat belt must not be twisted.
4. Insert the seat belt tab Item 1 into the opening in belt
buckle Item 3 until it clicks.
5. If necessary, adjust the seat belt to your body size. See
section »Adjusting the seat belt« (page 71).
Fig. 28
Buckling the seat
belt
Releasing the seat belt
1. Press the red button Item 2 on the belt buckle.
1
2
3
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Adjusting the seat belt
WARNING
Personal injury or property damage hazard.
Adjusting the seat belt while the wheel loader is
in operation can cause inadvertent control movements.
►► Do not adjust the seat belt while the wheel
loader is in operation.
►► Stop the machine first and then adjust the seat
belt.
Fig. 29
Adjusting the seat
belt
Lengthening
Adjust your seat belt so that it fits snugly.
Lengthening the seat belt:
1. Pull the tongue clasp to draw the seat belt out to the
required length.
Shortening the seat belt:
1. When seat belt is buckled, pull at the free end of the seat
belt until it lies snugly across your lower lap.
2. Secure the excess seat belt by pushing it through the
plastic clasp Item 1 (Fig. 29).
Shortening
1
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5.2 Starting up
WARNING
Possibility of injury or equipment damage from inoperable lights or individual functions.
►► Do not drive the loader if the entire lighting system or individual functions are not working.
The warning and indicator lights display fault messages from the equipment.
All the rocker switches are switched on by moving
them to the down position.
5.2.1 Lighting system and forward warning device
Check the lighting, turn signal, and forward warning
device each time before driving.
Switch the lighting on by activating the rocker switch item
S (Fig. 30/1). The rocker switch can be switched in two
levels:
• Bring the rocker switch to position 1:
–– Parking light is switched on.
• Bring the rocker switch to position 2:
–– Driving light is switched on.
• Bring the rocker switch to position 0:
–– The light is switched off.
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Fig. 30
Lighting / forward
warning device
Illustration 1
S
Switch the lighting, turn signal and forward warning device
functions on and off with the lever (Fig. 30/2).
1. Push the lever away from the operator:
–– The right turn signal is activated.
2. Pull the lever towards the operator:
–– The left turn signal is activated.
3. Push the lever upwards:
–– Main beam is switched on.
5
3
4. Push the lever downwards:
–– Low beam is switched on.
1
Illustration 2
4
2
5. Push the horn symbol on the button:
–– The forward warning device is activated.
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5.2.2 Wipers and windshield washer system
Fig. 31
Switches for windshield wipers
Front window
1
2
Switch the front windshield wiper and windshield washer
system on/off with the lever Item 1 (Fig. 31) to the left of
the steering wheel.
•
––
•
––
•
––
•
––
•
––
13
Rear window
a
Twist the rotary switch to position 1:
The windshield wiper switches on in level 1.
Twist the rotary switch to position II:
The windshield wiper switches on in level 2.
Twist the rotary switch to position J:
The front windshield wiper switches on in intermittent
mode.
Twist the rotary switch to position 0:
The windshield wiper switches off.
Item 2 (Fig. 31):
Press the button with the symbol
The washer system switches on.
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Switch the rear windshield wiper and windshield washer
system on/off with the rocker switch Item 13 (Fig. 31).
• Move the switch Item 13 into position 1:
–– The rear windshield wiper switches on.
• With your finger, move the interlock Item a in the switch
Item 13 downwards. Now you can move the switch Item
13 into position 2.
–– The back washer system switches on.
• Move the switch Item 13 into position 0:
–– The rear windshield wiper switches off.
Fig. 32
Location of the
windshield washer
container
75
Filling the container for the windshield washer
system
The container for the windshield washer system is located
on the rear side of the cab to the left. Access it by opening
the engine enclosure (Fig. 32).
WARNING
Burn and cutting/shearing hazards from hot or moving engine parts.
►► Do not open the engine enclosure until the engine has stopped.
►► Do not attempt to service the wheel loader until
the hot surfaces are comfortable to the touch.
For best cleaning performance, use a formulated
windshield fluid that enhances cleaning and protects the system from freezing
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5.2.3 Headlights and rotating beacon
WARNING
Personal injury or property damage hazard. Working and driving lights can blind passing motorists.
►► Do not drive on public roads with working lights
illuminated.
►► Confirm that the driving lights are aimed to avoid
blinding oncoming traffic.
The loader is equipped with headlights and taillights.
11 12
Fig. 33
Headlight and rotating beacon switches
14 15
0 Position
1 Position
The switches for switching on the headlights are located
in the cab to the right above the operator‘s seat (Fig. 33).
Switch the headlights on/off with the rocker switches Items
11 and 12.
Front headlights:
•
––
•
––
Put the rocker switch Item 11 in position 1:
The headlights switch on.
Put the rocker switch Item 11 in position 0:
The headlights switch off.
Rear headlights:
Operate the taillights using the rocker switch Item
12 (Fig. 33) the same way you would the front
headlights.
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The rotating beacon
(optional equipment)
Use the yellow rotating beacon according to local
regulations.
If you want to use a rotating beacon, mount it on the fastener
provided (Fig. 5).
The switch for operating the rotating beacon is located in
the cab above the operator’s seat (Fig. 33).
• Put the rocker switch Item 15 in position 1:
–– The rotating beacon switches on.
• Put the rocker switch Item 15 in position 0:
–– The rotating beacon switches off.
77
Rear window heating
The loader has a heated rear window. With this heater, you
can keep the rear window free of ice in cold weather.
The switch for switching on the rear window heater is located
in the cab above the operator‘s seat (Fig. 33). Switch the
rear window heater on/off with the rocker switch Item 14.
• Move the rocker switch Item 14 into position 1:
–– The rear window heater is switched on.
• Move the rocker switch Item 14 into position 0:
–– The rear window heater is switched off.
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5.2.4 Ventilation and heating of the cab
Heating
Ventilation
Temperature
Ventilate the cab by means of the fan with the heating
switched off, or by means of the doors and windows. The
doors and windows must be locked in open condition (Fig.
22 and 23):
Use the left regulator Item W to adjust the temperature
continuously (Fig. 34):
•
––
•
––
Turn the left regulator Item W to the left:
The temperature rises.
Turn the left regulator Item W to the left:
The temperature decreases.
Fan
Fig. 34
Heating controller
W
G
Adjust the fan by turning the right regulator Item G (Fig. 34).
The fan speed can be switched to three levels:
•
•
•
•
Level »0«
Level »1«
Level »2«
Level »3«
– Fan »OFF«
– Low speed.
– Medium speed.
– High speed.
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Ventilation outlets
You can use the outlets (Fig. 35) to control air flow into cab.
In cold weather, warm air supply keeps the windows free of
ice and heats the cab in the process.
Air conditioning system
(optional equipment)
NOTICE
Place the air conditioning system into operation at
least once per month to maintain its functioning.
The air conditioning system is switched on and off using
the rocker switch adjacent to the steering wheel on the
right (Fig. 36).
Fig. 35
Ventilation outlets
Fig. 36
Rocker switch for
air conditioning
system
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5.2.5 Before starting the engine
Before starting the engine:
• Make sure that no one is on or near the loader.
• Keep the operating elements clean and dry.
• Remove or tighten all loose objects in the
cab.
• Make sure that the cab windows and exterior
mirrors are clean.
• While in the operator’s seat, position the exterior
mirrors so that you have a good view of the area
immediately behind the loader.
• Make sure that all safety devices are fitted, all
tools have been removed after repairs, and the
enclosure is closed.
1. Perform the »Before entering the cab« checks prior to
starting the engine (see the chapter »Operation«).
2. Adjust the operator’s seat and the steering column as
needed.
3. Adjust the rear view mirror / exterior mirror.
4. Put on your seat belt.
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5.2.6 Starting the engine
• Check that no one is in the loader‘s danger
area.
• Do not use ether as a starting aid.
• Do not use the loader if the »starter inhibitor«
does not function.
• Only start the loader from the operator’s seat.
• Due to the high viscosity in the hydraulic system at temperatures below 0°C (32°F), major
machine damage can occur when the speed is
increased immediately.
• Let the engine run at a low speed at temperatures below 0°C (32°F) until the hydraulic fluid
is warm enough to permit smooth responsive
operation.
• The lower the outside temperature, the longer
the warm-up phase.
• Observe the hydrofilter‘s pressure display.
• Do not under any circumstances tow-start the
loader to start the engine. This could damage
the hydraulic system.
• Turn off the engine immediately if the warning
lights do not go out when the engine is running.
• Have the malfunction rectified immediately. Do
not use the loader again until the malfunction
has been rectified.
• Do not suddenly turn off the engine from full
load, but rather allow it to idle for 3 minutes
before turning it off it to equalize the temperature.
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Description of the starting process
Use the starting key to start the loader‘s engine (Fig. 37).
0
I
1.
2.
•
•
•
•
II
III
•
3.
Fig. 37
Starting switch
Push the foot accelerator.
Starting:
Put in the key - level 0 = no operating voltage.
Turn the key to the right - level I = operating voltage;
The indicator lights (oil pressure, alternator) must be
illuminated
Turn the key to the right against spring pressure.
Level II = Preheating
Turn the key further to the right against spring pressure
- level III = start.
Let go of the key as soon as the engine starts - the
key will return to level I - and the indicator lights will go
out.
Check if all the indicator lights have gone out, correct
any possible malfunctions before driving off with the
loader.
WL50
Preheating
You can preheat the engine to make the starting process
at lower temperatures easier.
1. The heating process is automatically activated when
level I is switched on.
2. The heater indicator light Item 1 (Fig. 13) lights up.
3. Start the engine at level III as soon as the heater indicator light goes out.
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83
If the engine does not start
It is absolutely not possible to start the engine by
tow-starting the loader. This could damage the hydraulic system.
• Attempt to start the loader for a maximum of 20 seconds.
• Wait one minute.
• Repeat the starting process.
• If the engine will not start after two attempts, look for
the cause in the malfunction table (»Troubleshooting
and emergency maintenance«) or contact a specialist
garage.
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5.3 Propulsion operation
Description of the propulsion hydraulics
See »Hydraulics« section of 3.1 Technical Description on
page 40.
5.3.1 Preparation for travel in public traffic
• Before you start travel, make sure that the machine complies with the relevant local regulations.
• Fork prongs of pallet forks must be dismantled
before undertaking trips in public traffic.
1. Secure the attachment:
–– Ensure that the bucket has been emptied and has been
lowered to transport position.
–– Put the tooth guard on the bucket.
2. Check the lighting system, and if applicable, the function
of the rotating beacon.
Switch on the headlights.
3. Adjust the attachment height for clearance with the road
surface, but not more than necessary for safe transport
to avoid visibility restrictions and reduced stability.
4. Do not travel with the loader arms completely raised to
avoid collision with overhead objects such as viaducts
and electrical power lines.
5. After adjusting the loader arm height, engage the travel
lock to prevent unintentional control activation.
6. Confirm that the seat belt is properly adjusted.
7. Survey the surrounding area to ensure that moving into
traffic can be done safely.
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5.3.2 Travel speed
WARNING
Personal injury hazard from tipping or roll-over
incidents.
To avoid tipping and roll-over incidents:
►► Keep the loader lift arms and bucket load as
low as practical
►► Keep the loading site level.
►► match the speed to working conditions to maintain control of the machine
►► Constantly survey the work area for obstructions, vehicles and people to avoid collisions
and runover incidents.
All functions of the multi-function lever only works
if the operator has attached the seat belt firmly and
comfortably around the lower torso.
Indicator lights will indicate the travel directions
and gears selected.
When the parking brake is engaged the loader‘s
drive is switched off (driving lock). This is shown
by the illuminated parking brake indicator. It is not
possible to travel until the parking brake has been
released and the indicator light has gone out.
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Changing travel directions
WARNING
Personal injury and machine damage hazards from
abrupt directional changes. Actuating the direction
switch when the loader is moving will cause the
moving loader to change direction abruptly.
►► Do not change the travel direction switch position when the loader is moving in either forward
or reverse.
►► Before and after changing direction with the
loader stopped, confirm that the indicator lights
are in agreement with the intended direction
selected.
►► If the direction control does not respond or the
indicator light does not illuminate, move the machine to a safe location, lower the loader arms
until the attachment is resting on the ground,
stop the engine and inform the supervisor of a
service need.
►► Do not operate the loader until a technician
has restored the function before operating the
machine.
Be careful when traveling in snowy and icy conditions. Reduce your travel speed considerably in
the event of bad weather.
If the loader is equipped with the optional equipment »Backup alarm for reverse drive«, a backup
alarm sounds when reverse gear is engaged. The
sound is to warn persons who are in the vicinity of
the loader that the loader is going into reverse.
Use the slide switch Item 1 (Fig. 38) to change the loader‘s
travel direction. After the engine has been started, the gear
changer is in neutral position.
•
––
•
––
Travel direction switch in middle position:
Gear changer in Neutral
Push the travel direction switch forward:
The indicator light »15« (Fig. 13, page 50) is illuminated.
The loader travels forward.
• Push the travel direction switch back:
–– The indicator light »16« (Fig. 13, page 50) is illuminated.
The loader travels in reverse.
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Changing speeds
Fig. 38
Changing direction
1
The loader has an overdrive and a crawler gear. Use the
button item 2 (Fig. 38) to shift the loader‘s gears. After starting the engine, overdrive is automatically activated.
•
––
•
––
2
1
12V
2
Press the button:
The loader shifts from overdrive to crawler gear.
Indicator light »14« (Fig. 13 ,page 50) lights up.
Press the button again:
The loader shifts from crawler gear to overdrive.
Indicator light »13« (Fig. 13 ,page 50) lights up.
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Loader travel
Braking and stopping
• Release the parking brake after the engine has warmed
up.
–– The handbrake indicator light will go off. The loader is
ready to travel.
• Select the travel direction by actuating the travel direction switch.
–– The indicator light shows the travel direction selected.
You can travel.
• Push the accelerator.
–– The loader will be brought up to speed smoothly.
To change the traveling speed independently of the engine speed, you can push the braking-inching pedal on the
operator’s platform next to the steering column. The first
part of the pedal‘s path adjusts the travel back down, then
the brake system is actuated. Pushing the braking-inching
pedal allows you to continuously reduce the pump flow
rate until the loader has come to a halt without wearing out
the material. This allows you to also travel very slowly at a
high engine speed.
The loader‘s traveling speed is proportional to the accelerator‘s displacement.
• low engine speed = low traveling speed
• high engine speed = high traveling speed
• Reduce the loader‘s traveling speed by decreasing the
engine speed.
• To brake the loader, step on the braking-inching pedal.
• To stop, step on the braking-inching pedal until the loader
has come to a stop.
• Shift to neutral.
• Pull the lever for the parking brake.
P
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Changing the travel direction
WARNING
Personal injury and machine damage hazards from
abrupt directional changes. Actuating the direction
switch when the loader is moving will cause the
moving loader to change direction abruptly.
►► Do not change the travel direction switch position when the loader is moving in either forward
or reverse.
It is not necessary to depress the inching pedal to
the end of the movement every time you change
direction.
1. Reduce the travel speed until the loader has come to
a halt.
2. Move the travel direction switch in the other direction.
3. Push the accelerator so that the loader starts moving.
5.3.3 Stopping and parking
• Stop the machine in a safe location out of the
traffic flow pattern and on firm ground.
• Lower the loader arms with bucket or attachment until resting on the ground.
• Remove the starting key before leaving the operator seat.
Bring the loader smoothly to a halt by easing up
on the accelerator or actuating the braking-inching
pedal and secure it as described in section 9 page
137 »Securing the loader«.
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5.4 Work operation
Before starting to work with the loader:
• Survey the work area to determine if people,
vehicles and obstacles are in the immediate
work area. Do not start work until the work area
is clear.
• Constantly survey the area during working operation to avoid collision with people, vehicles
and obstacles that may inadvertently enter the
loader work area.
• Verify that all controls are working correctly and
the indicator lights are functioning. Move the
lift arm and attachment hydraulics to assure
smooth control response.
• Jerky, spongy or delayed control response may
indicate that air has entered the hydraulic system. Cycle the hydraulic system a few times. If
the controls become smooth, the air has been
eliminated from the system. If the problem persists, do not operate the machine in this condition. Advise the supervisor and have a technician determine the source of air entrainment.
• Inspect attachments to confirm they are in serviceable condition and are properly connected
to the loader arms.
In the event of power loss (failure of the engine and/
or driving or working hydraulics), lower the loader lift
arms to the ground immediately and relieve the control circuits and hydraulic lines of pressure. Read
section 7 page 133 »Lowering loader arms«.
WL50
Each time before starting work
• Examine the loader for visible defects prior to each work
shift.
• Check the functioning of the operating equipment.
• Check the functioning of the brakes and warning devices.
• Report any defects to the supervisor and, when changing
shifts, to the operator taking your place.
• Perform the checks described in sections 5.1 (page 58)
and 5.2.5 (page 80).
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5.4.1 Operating lever for Loader lift arms
• Keep the loader lift arms and attachment as low
as practical when traveling. This improves visibility and stability, and reduces the risk of striking overhead objects such as power lines.
• Do not activate float control of the loader arms
until the bucket or attachment is in contact with
the ground or surface to be back dragged. Engaging float with the lift arms raised will cause
rapid descent of the lift arms.
• Do not engage the loader controls unless
seated in the operator seat with the seat belt
fastened.
• Operate the loader with smooth steady control
motion. Rapid and jerky control motion is inefficient and will cause operator fatigue and cause
potential harm to the loader.
• Do not leave the operator seat until the loader
lift arms and attachment have been lowered to
the ground.
The loader lift arms float position is located on the
»Lower« and »Tilting out« function. When
the multi-function lever is released, it automatically returns to the neutral position (except when
in float position).
Use the multi-function lever to control the movements of the
loader lift arms Item A (Fig. 39). The multi-function lever is
located on the right next to the operator’s seat.
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Float position (
)
• Press the multi-function lever Item A (Fig. 39) forward
across the resistance until it engages:
–– The float position engages.
• Pull back the multi-function lever Item A across the resistance:
–– The float position disengages.
Loader lift arms
•
––
•
––
Pull the multi-function lever Item A rearwards:
The loader lift arms are raised.
Pull the multi-function lever Item A forwards:
The loader lift arms are lowered.
Attachment
•
––
•
––
Pull the multi-function lever Item A to the left:
The attachment curls upward for loading.
Pull the multi-function lever Item A to the right:
The attachment curls downward to dump.
Fig. 39
Operating lever for
loader lift arms
A
93
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O perating and operation
5.4.2 Loader lift arms locking system
• Before traveling from worksite to worksite over
extended distances, engage the loader lift arm
lock after selecting the height for the travel arms
for the travel segment.
• Do not release the loader lift arm lock until starting the work cycle, or after parking the loader
and prior to lowering the lift arms to the ground
with the attachment.
The loader lift arm can be secured against unintentional operation by means of a locking mechanism.
If you have switched on the locking mechanism,
the loader lift arms will not move if the loader controls are moved. When the locking mechanism is
switched on, the control lamp in the switch lights
up (Fig. 40), and it is impossible to activate the
loader lift arm.
Fig. 40
Switch for the locking mechanism of
the loader lift arms
Activate the loader lift arms locking system by switching the
rocker switch (Fig. 40).
• Switch the rocker switch (Fig. 40) to position 1:
–– The locking system is switched on.
• Switch the rocker switch (Fig. 40) to position 0:
–– The locking system is switched off.
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5.4.3 Activating the optional hydraulics
Activating the optional hydraulics using the
control lever
Place the optional hydraulic control in neutral when
the system is not required. This is necessary to
avoid over­heating the hydraulic system and improve
fuel economy.
Clean the quick connecting fittings carefully before
connecting the optional hydraulic system fittings
together. This will avoid introducing contaminants
into the system that can cause damage to the hy­
draulic components. Keep connections covered
when not in use.
Avoid damage to the three-way valve (Fig. 42). Do
not switch this valve when it is under pressure.
Depressurize attached optional hydraulics before
switching the valve.
Fig. 41
Operating lever
for the optional
hydraulics
R
Z
L
You can activate the loader lift arms hydraulic connections
(Fig.43) using the control lever for the optional hydraulics
item Z (Fig.41).
You can also activate the hydraulic locking mechanism of
the quick-change system for the attachments with the control
lever for the optional hydraulics (Fig. 41).
A three-way valve (Item H) is on the loader lift arms for
toggling between the functions (Fig. 42).
95
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O perating and operation
If the valve lever is set at »Hydraulic locking mechanism«,
you can actuate the hydraulic locking mechanism via the
control lever for the optional hydraulics Item Z (Fig. 41):
Fig. 42
Three-way valve
H
• Move the control lever for the optional hydraulics backwards (L):
–– The tool attachment is unlocked.
• Move the control lever for the optional hydraulics forwards (R):
–– The tool attachment is unlocked.
If the valve lever is set to »Hydraulic locking mechanism«,
you can actuate the loader lift arms‘s hydraulic connections
(Fig. 43) via the control lever for the optional hydraulics
Item Z (Fig. 41).
• Move the control lever for the optional hydraulics backwards:
–– The connection on the left is the pressure side, the one
on the right is for return flow.
• Move the control lever for the optional hydraulics forwards:
–– The connection on the right is the pressure side, the
one on the left is for return flow.
L
R
Fig. 43
Hydraulic connections
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Detent mechanism for the optional hydraulics
NOTICE
Overheated hydraulic oil can damage the machine.
Make sure that the control lever for the optional
hydraulics is always in »zero position« when the
detent mechanism is not required.
This function allows you to operate the optional hydraulic
connections in continuous use. This function is necessary
for certain attachments powered by a hydraulic motor that
necessitates continuous use (e.g. broom). Then you do not
have to constantly hold the control lever for the optional
hydraulics.
• Move the control lever for the optional hydraulics forwards past normal operation position:
–– The lever will be locked, providing continuous hydraulic
pressure and flow.
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O perating and operation
Activating the optional hydraulics using the button
If the detent mechanism of the optional control lever
is engaged, it is not possible to activate the optional
hydraulics with the button.
You can activate the hydraulic connections on the loader lift
arms (Fig. 43) using the buttons for the optional hydraulics
Item 1 and Item 2 (Fig. 44).
You can also activate the hydraulic locking mechanism of
the quick-change system for the attachments with the buttons for the optional hydraulics (Fig. 44).
A three-way valve, item H, is located on the loader lift arms
to allow toggling between the functions (Fig. 42).
If the lever of the valve is set to »Hydraulic locking mechanism«, you can activate the hydraulic locking mechanism
via the buttons for the optional hydraulics, Item 1 and Item
2 (Fig. 44):
• Activate the button for optional hydraulics Item 1 (Fig.
44):
–– The tool attachment is locked.
• Activate the button for optional hydraulics Item 2 (Fig.
44):
–– The tool attachment is unlocked.
If the valve lever is set to »Hydraulic locking mechanism«,
you can actuate the loader lift arms‘s hydraulic connections
via the buttons for the optional hydraulics (Fig. 44).
• Activate the button for optional hydraulics Item 1:
–– The left-hand connection is for the pressure side, the
right-hand is for the return line.
• Activate the button for optional hydraulics Item 2:
–– The right-hand connection is for the pressure side, the
left-hand is for the return line.
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99
Depressurized return line
Fig. 44
Button for optional
hydraulics
1
For some attachments, a depressurized return line is required. The connection for the depressurized return line
is located on the front left of the load arm (Fig. 45). The
connection is designed in such a way that it is not possible
to confuse it with the normal connections for the optional
hydraulics.
2
1
Fig. 45
Depressurized
return line
2
12V
100
O perating and operation
5.4.4 Differential lock
Avoid damage to the transmission!
Only switch on the differential lock if the wheels
are not moving.
Only use the differential lock for loading work on
loose or slippery surfaces!
After releasing the button (item 1, Fig. 46), the differential can be locked occasionally. This is noticeable by more effort for steering. Try to release the
differential lock by slight right / left steering movements or by changing the direction of travel.
Activate the differential lock using the button, item 1, on
the multi-function lever (Fig. 46). With the differential lock
engaged, both wheels on the axle can transmit torque increasing traction on slippery surfaces.
• Depress the button item 1 (Fig. 46):
–– The differential lock switches on.
• Release the button item 1 (Fig.46):
–– The differential lock switches off.
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1
Fig. 46
Switch for differential lock
12V
1
101
102
O perating and operation
5.4.5 Changing attachments
This Operator’s Manual describes only the use of the following attachments:
• Light cargo buckets
• Earth buckets
• Earth buckets with digging teeth
If you wish to use optional attachments with your loader,
please observe the following:
Contact your Wacker Neuson dealer before using any attachment not in the approved list. The dealer and Wacker
Neuson technical staff can determine the compatibility of
the proposed attachment.
Wacker Neuson is not liable for changes made
without its approval.
• Use only Wacker Neuson -approved attachments for your loader. Wacker Neuson is not
liable in the event of other attachments being
used.
• Do not exceed the rated load capacity of the
wheel loader as stated in the specifications.
Exceeding the rated capacity can create unintended hazards and reduce the operating life
of the loader.
• Replace the hoses on the loader with original
equipment hose assemblies supplied by your
Wacker Neuson dealer. These assemblies meet
the exacting standards of performance of the
new machine.
• Make sure to match the SAE designations when
ordering replacement hoses and/or fittings. Contact your Wacker Neuson dealer for assistance
in obtaining replacement parts.
• Observe the safety instructions for changing
attachments.
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NOTICE
Unapproved attachments could overload the loader.
This can result in damage to the loader.
1. Before assembly, start-up or maintenance, read the
Operator’s Manual for the relevant attachment.
2. Practice using the attachment before working with it the
first time. Familiarize yourself ahead of time with all the
functions and control elements.
The loader is equipped with a hydraulic quick-change system for various attachments. The operator can thus couple
and uncouple attachments in a quick and uncomplicated
manner, from the operator‘s seat.
• When loading, adjust your driving speed to the
material being loaded and traction conditions.
• Avoid contact with hydraulic fluid in the event of
pressurized leakage. In the event high pressure
fluid comes in contact with skin, or if hydraulic
fluid enters the eye, seek immediate treatment
in an emergency room.
• Do not use an attachment unless it is in serviceable condition.
• Before attempting to uncouple an attachment,
read the instructions for the uncoupling process.
Confirm that the attachment will not move when
removed from the loader lift arms.
• To avoid personal hazards and potential machine damage, confirm that the attachment is
properly and firmly connected to the loader lift
arms before use.
• Do not perform service or repairs on the attachment unless the loader and loader lift arms are
secured as described in section 9 page 137
»Securing the Loader«.
103
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O perating and operation
Coupling of attachments
WARNING
Personal injury hazard.
Falling attachments can strike people.
►► Always switch the three-way valve (Fig. 47) to
hydraulic connection as soon as the attachment
is locked.
►► Check the locking pins items 1 & 4 (Fig. 48) to
avoid unintentional disconnection of the attachment. Confirm that the hydraulic couplings are
correctly matched to operate the attachment.
Pressurized hydraulic oil can penetrate the skin,
causing infections.
►► If this occurs, seek immediate emergency room
treatment.
►► Oil entering the eyes must also be treated immediately in an emergency room.
NOTICE
Avoid dirt. Make sure that the hydraulic connections are clean.
Avoid damage to the three-way valve (Fig. 42). Do
not switch the valve when the attachments are under pressure. Depressurize the optional hydraulics
before switching the valve.
ENVIRONMENTAL NOTE
Hydraulic oil is hazardous to the environment. Do
not allow it to be released uncontrollably into the
environment.
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Hydraulic connection
Hydraulic locking mechanism
Fig. 47
Switching the threeway valve
NICHT UNTER LAST schalten
Do not operate under load
Ne pas changer de vitesse sous charge
Quitar la presión antes de cambiar
105
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O perating and operation
1. Drive the loader up to the attachment (Fig. 48).
2. Bring the locating pins Item 1 under the mounting hook
Item 2.
3. Raise the loader lift arms and curl the attachment bracket
to mate the coupler surface together.
4. Extend the locking pins Item 4 with the control lever for
the optional hydraulics.
5. Check that both pins are engaged in the locking holes
Item 3.
6. Press the »Relieve pressure« button (Fig. 48) to depressurize the lines for the optional hydraulics.
7. Switch the three-way valve to »hydraulic connection«
(Fig. 47).
For hydraulically activated attachments:
8. Screw the attachment‘s quick couplers to the appropriate connections of the attachment hydraulic lines on
the loader lift arms.
9. Check that there are no leaks in the attachment‘s hydraulic system and the quick couplers of the attachment
hydraulic lines. Slowly actuate the attachment control
to confirm the controls are working correctly and the
couplers and hydraulic lines are not leaking.
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Uncoupling attachments
1
2
3
Fig. 48
Coupling the
hydraulic locking
mechanism
• Lower the attachment until it is firmly resting on
a hard surface.
• Close attachments with movable components
such as clamshells.
• Actuate the attachment controls through the full
range of motion to release residual hydraulic
pressure.
• If the attachment is equipped with integral supports, extend them to the support position.
• Place the attachment only on a hard, even foundation.
Rocker switch for
relieving pressure
in the optional
hydraulics
ENVIRONMENTAL NOTE
When uncoupling the hydraulic connections, hold
a pan under the optional hydraulics‘ quick couplers
to catch any oil that might run out. Dispose of it in
an ecologically sound way.
4
107
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O perating and operation
WARNING
Personal injury hazard.
Falling attachments can strike people.
►► Always switch the three-way valve (Fig. 47) to
hydraulic connection as soon as the attachment
is locked.
►► Check the locking pins items 1 & 4 (Fig. 48) to
avoid unintentional disconnection of the attachment. Confirm that the hydraulic couplings are
correctly matched to operate the attachment.
Pressurized hydraulic oil can penetrate the skin,
causing infections.
►► If this occurs, seek immediate emergency room
treatment.
►► Oil entering the eyes must also be treated immediately in an emergency room.
1. Lower the attachment.
2. Press the »Relieve pressure« button (Fig. 48) to depressurize the lines for the attachment hydraulics.
3. Disconnect the hydraulic couplers and place covers over
the exposed ends to exclude foreign material.
4. Place the hydraulic hoses over the attachment.
5. Switch the three-way valve to »hydraulic locking mechanism« (Fig. 47).
6. Retract the locking pins Item 4 with the control lever for
the optional hydraulics.
7. Slightly lower the loader lift arms to disengage the upper
attachment support coupler halves. Activate the bucket
curl, rotating the lower portion of the loader frame coupler away from the attachment coupler.
8. Back the loader away from the attachment if the receptacle frame is free.
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5.4.6 Bucket
109
Function
NOTICE
Avoid overloading. Observe the maximum permissible payload.
Operate the control lever carefully.
The light cargo bucket / earth bucket attachments are intended for loosening, picking up, transporting and dumping
materials.
The light cargo bucket is used for light materials
such as grain, maize and pellets.
The earth bucket is used for heavy materials such
as gravel, sand, soil and stone.
Read the chapter »Changing attachments« (Section 5.4.5,
page 102).
Attaching the bucket
Operating element
Operate the bucket using the control lever for the loader
lift arms. Read the chapter »Operating lever for Loader lift
arms« (Section 5.4.1, page 92).
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O perating and operation
Operation
Before performing work for the first time, practice
handling the bucket.
When dumping the bucket and loading vehicles, you can
perform two work movements at the same time if necessary,
e.g. lifting and dumping or lowering and curling to load. To
do so it is necessary to overlay the movement on the control
lever (Fig. 49).
The float position facilitates stripping during resurfacing
work. To do so, lower the bucket with the tip to the ground.
Then engage the control lever in position 2a. The bucket
now lies on the ground, free to move and burdened only
by its own weight.
0= Neutral position
1= Lift
2= Lower
2a= Float position
3= Tilt in
4= Tilt out
2a
2
0
3
1
Fig. 49
Control lever movements
4
O perating and operation
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Level indicator
With the attachment in a horizontal position, mark
the place on the tipping cylinder on which the level
indicator is located with a colored line. Item 1 (Fig.
50).
Use the level indicator (Fig. 50) in order to assess more
effectively the curl position of the attachment from the operator’s seat.
Fig. 50
Level indicator
111
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O perating and operation
Working with the bucket
WARNING
Tipping hazards. Improper use of the loader lift
arms and bucket may cause the loader to tip, possibly causing injury or equipment damage.
►► Operate the loader with the bucket as close as
practical to the working surface or ground to
reduce the risk of tipping the wheel loader.
►► To reduce the risk of tipping the wheel loader,
do not raise the loader lift arms and fully loaded
bucket unless the ground or operating surface
is firm and flat.
►► Do not drive across slopes with the loader arms
raised.
►► Do not travel up or down slopes with the loader
arms raised.
Adjust your driving speed when driving into the
loading material, according to the type of material
and the respective conditions.
Make sure that no excessive wheel slip occurs.
Tire wear and fuel consumption will increase unnecessarily and the loader‘s performance will not
be fully utilized.
Loading work
Fig. 51
Loading work 1
Lower the bucket to pick up loose material so that it is parallel to the ground and move it into the material to be loaded.
Here the driving speed should correspond to the type of
material and the respective working conditions (Fig. 51).
WL50
Now raise the loader lift arms slightly so that the weight is
on the loader‘s front axle. This is to avoid excess wheel slip.
You can also manually restrict wheel slip by inching.
O perating and operation
Fig. 52
Loading work 2
To fill the bucket, curl the bucket as shown in Fig. 52 as the
loader arms are slowly raised. Carry the loaded bucket in
this position to the location or truck where the material in
the bucket is to be deposited.
Carry the loaded bucket low until necessary to lift it to the
necessary loading height.
If material is to be loaded which the bucket cannot easily
penetrate, you can create an up-and-down movement of
the bucket cutting edge by alternately curling the bucket
slightly upward and downward while penetrating into the
material. This makes it easy for the bucket to penetrate the
material (Fig. 53).
Fig. 53
Loading work 3
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O perating and operation
Excavation work
Soft material:
Lower the bucket to the ground to lift out soft material and
tilt the bucket forward until you have a digging angle. If you
start driving the loader forward now, the bucket‘s digging
edge will break into the ground. Now make the tilting angle
flat to remove as even a layer as possible and to avoid a
large amount of wheel slip (Fig. 54).
Resistant material:
Lower the bucket to the ground to lift out resistant material
and tilt the bucket forwards until you have a digging angle.
When you drive the loader forwards now, slightly press the
bucket downwards so that it can break into the ground.
Should the bucket‘s digging angle penetrate the ground,
make the tilting angle flatter. Use the bucket curl control
lever to produce an up-and-down movement of the digging
edge of the bucket (Fig. 55).
Fig. 54
Excavation work 4
Fig. 55
Excavation work 5
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5.4.7 Tip-overs
If the machine tips over, or in the event of an extreme slope condition, take the following steps to
avoid engine damage:
• Stop the engine as quickly as practical to avoid
damage from lubrication starvation.
• Do not operate the engine or machine after an
incident until a technician has inspected and
corrected any damage resulting from the incident.
ENVIRONMENTAL NOTE
Right the loader as soon as possible so that oil and
fuel cannot escape.
Immediately soak up with binding material any oil
or fuel that has leaked, and dispose of it separately from other waste in an ecologically sound
manner.
115
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O perating and operation
5.4.8 Precaution measures for various temperature conditions
At high outside temperatures
Take the following precautions at high temperatures to prevent the loader from being damaged:
• Regularly check the cooling system:
--Keep the engine coolant and oil coolers clean
--Make sure that the coolant level is always correct
--Use the proper coolant mix.
--Regularly check the cooling system for leaks
--Regularly check the condition and tension of the fan
pulley
• Use engine lubricating oil of the proper viscosity
class.
• Regularly check the engine air filter.
At low outside temperatures
• Do not use starting aids such as ether. The
manifold heating system can ignite the ether,
causing an explosion.
• Snow, mud and freezing rain reduce traction.
Reduce speed and avoid slopes under these
conditions.
• Maintain the windshield cleaning fluid system
and keep all windows clean. Visibility is a basic
necessity for safe operation.
Additional starting aids may be required if the temperature is –18°C (0°F) or less. Typically, these aids
are auxiliary engine oil and coolant heaters along
with additional battery cranking capacity.
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Hydraulic and lubricating fluids are more viscous
when cold. When ambient temperatures are at or
near the freezing point of 0°C (32°F), permit the
engine, drivetrain and hydraulic system to warm up
at idle speed until the temperature indicator for the
system indicates warming has progressed.
• Operate the wheel loader slowly and smoothly
to accelerate the warming process.
• Observe the hydraulic system filter pressure
display to determine if pressure is excessive.
• Do not connect two 12V batteries in series (+
to –) and then connect the remaining battery
poles to the starter or starter solenoid. This will
damage the electrical system
117
Take the following precautions at low temperatures to prevent the loader from being damaged and to make the loader
easier to start:
• Use the proper coolant mix.
• Use engine lubricating oil of the proper viscosity
class.
• Use diesel fuel for low temperatures.
• Fill the fuel reservoir at the end of the work shift.
• Make sure the battery is always fully charged.
• Install the cold starting aid (see note above!).
118
O perating and operation
5.5 Optional equipment
Loader lift arm damping
Activate the loader lift arm damper control to improve ride quality and stability during travel with the
loader. Disengage the damper control before attempting to use the loader for loading operations.
Before engaging the damper feature, verify that the
loader bucket or attachment has sufficient clearance with the ground to avoid contact while traveling. The loader lift arms will drop when the damper
function is activated.
To negate pitching motion of the loader chassis
when traveling, raise the bucket or attachment
approximately 30 cm (12”) to compensate for the
vertical movement of the bucket or attachment as
the feature moves.
Engaging the feature reduces the effect of uneven ground
on the attitude of the machine when traveling at higher
speeds. It reduces pitching by use of the loader arm mass
and hydraulic system to act as a damper. This reduces the
stress on the wheel loader and the motion imparted to the
operator through the seat. This feature reduces the effect,
but does not replace the operator’s responsibility for observing the terrain and making speed reductions to avoid
extreme motion over undulating surfaces.
The loader lift arm damping is engaged in the 2nd level
using the rocker switch for the float position to the right of
the operator‘s seat, Item 2 (Fig. 56).
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Loader lift arm damper activation
• Move the rocker switch Item 2 into position 2:
The indicator light in the switch is illuminated
–– Damping is engaged. Do not actuate the loader lift arm,
bucket or attachment control.
• Move the rocker switch Item 2 into position 0:
The indicator light in the switch is goes off
–– Damping is disengaged. Loader controls can be actuated.
Fig. 56
Switch for loader lift
arm damping
2
119
120
O perating and operation
Electrical connector on the loader lift arms
2
Activate the electrical connector on the lift arms (Fig 57) by
depressing the switch 2 designated in Fig 58.
Fig. 58
Switch for the electrical connector on
the loader lift arms
The electrical connector on the loader lift arm is used to
connect attachments for which certain functions must be
activated electrically.
Fig. 57
Electrical connector
on the loader lift
arms
2
12V
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122
T owing and transporting
6
TOWING AND TRANSPORTING
6.1 Towing
WARNING
Personal injury or equipment damage hazards from improper towing.
►► Do not attempt to tow the machine if the steering system or brake system is not serviceable. Loss of control
during towing can occur. Load the wheel loader and transport it to a repair facility with trained technicians.
►► A tow bar is preferred for towing the wheel loader. Towing straps, cables or chains must be of sufficient capacity to withstand the energy imparted to the towed machine by the towing source. Inspect the towing device
to confirm that it is serviceable and will perform to OSHA ratings for the device.
►► The towing machine must be sufficiently powerful and massive enough to control the towing event.
►► Develop a coordinated plan between the towed machine operator and the towing machine operator before
attempting to start towing. Agree on visual signals if verbal communication is not feasible.
►► Do not begin the tow until all other people are safely away from the towing area in the event an unforeseen
incident occurs.
T owing and transporting
WL50
Towing equipment
NOTICE
Towing the wheel loader can damage the hydrostatic propulsion system unless the following conditions are met:
Do not tow the wheel loader more than 500 meters
(0.3 miles).
Do not exceed 2 km/h (1.2 mph) during the towing
operation.
Transporting the wheel loader farther than 500 meters (0.3 miles) requires that it be loaded on suitable
transport to the repair destination.
Do not use the towing equipment to pull trailer
loads.
Fig. 59
Towing equipment
123
124
T owing and transporting
Disconnecting the drive (Bypass- switching)
WARNING
Possibility of personal injury or equipment damage. An unsecured operator station can move or
tip unexpectedly during a towing operation.
►► Do not attempt towing the wheel loader until the
operator cab/platform has been secured.
Fig. 60
Disconnecting the
drive
1
2
SW 4
SW 13
Activating the bypass
Deactivating the bypass
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To tow the loader, it is necessary that you disconnect the
drive. In this case the travel transmission is switched on to
free wheeling. For this purpose the variable displacement
pump has incorporated high pressure relief valves with
bypass function.
1. Tilt the operator cab/platform upward from the left side
for access to the high pressure relief valves (refer to
Section 10.7.1, pages 164-168).
2. Loosen hex nut Item 2 (Fig. 60).
3. Screw in the stud Item 1 (Fig. 60) until it is level with the hex nut.
Note: Turn the studs Item. 1 (Fig. 60) no further than
described, otherwise parts of the valve become damaged.
4. Return the operator cab/platform to operating position
and follow instructions provided in Section 10.7.1, pages
164-168 to securely fasten the operator cab/platform in
the normal operating position.
5. The Wheel Loader can be towed.
After towing:
1. Tilt the operator cab/platform upward from the left side
for access to the high pressure relief valves (refer to
Section 10.7.1, pages 164-168).
2. Screw back stud Item 1 (Fig. 60) to stopper.
3. Tighten hex nut Item 2 (Fig 60) to a torque of 22 Nm
(16 ft.lbs.).
125
126
T owing and transporting
6.2 Transporting
Load and transport the loader only according to
DOT safety regulations.
Only experienced, trained specialized personnel
may load and transport the loader.
Articulation frame lock
Personal injury hazard. Install the articulation frame
lock slowly and carefully to reduce the risk of injury.
The articulation frame lock is stored on the front
frame of the wheel loader as illustrated in Fig 61. It
is secured by two pins which are retained by spring
pins. To install the articulation frame lock, remove
the spring pin from the front locking pin, pivot the
articulation frame lock down, and fit over the rear
locking pin. Secure with spring pin.
An articulation frame lock is provided as illustrated
in Fig 61 for preventing unintended frame articulation during transport.
After securely tying the wheel loader to the platform of the transport vehicle with OSHA or DOT
rated devices for the wheel loader mass, install the
articulation joint lock as shown in Fig 61.
Reverse the procedure at the point the wheel loader
is to be unloaded from the transport.
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Fig. 61
Articulation frame
lock
Articulation frame
lock storage position
1
Articulation frame
lock installed
127
128
T owing and transporting
Loading on a transport vehicle
Clean the wheel loader to reduce the hazard of
dirt and debris falling from the machine during
transport.
Clean the wheel loader tires, loading ramp and
transport vehicle load deck to reduce the slipping
hazard during loading.
Use a transport vehicle rated to carry the mass of
the wheel loader and attachments.
Confirm that the transport vehicle is serviceable
for the transport task.
Move the loader slowly and follow directions from
people assisting with loading and alignment on the
transport vehicle.
Install the frame articulation lock.
Secure the wheel loader to the transport per the
instructions in Section 9 »Securing the Loader«
on page 137.
Loading with crane
WARNING
Possibility of equipment damage or personal injury
from improper lifting.
►► Confirm that the lifting device has adequate
lifting capacity and reach to perform the lifting
operation.
►► Confirm that the lifting devices (slings, cables
or chains) are OSHA rated for the wheel loader
and attachment mass.
►► Confirm that the lifting devices are in serviceable condition according to the rating.
►► Install the frame articulation lock.
►► After completing the lift and correctly positioning
the wheel loader on the transport, secure the
loader using instructions in Section 9 »Securing
the Loader« on page 137.
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Use the attachment points (Fig. 63) that are marked with
labels (Fig. 62) indicating the lifting points. Rotate the eyelets
on the rear attachment points by loosening the mounting
screws. Retighten the mounting screws after rotating the
eyelets into lifting position.
Fig. 63
Attachment points
front
Fig. 62
Attachment point
label
rear
129
130
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Independent driving onto the transport device
Clean the wheel loader to reduce the hazard of
dirt and debris falling from the machine during
transport.
Clean the wheel loader tires, loading ramp and
transport vehicle load deck to reduce the slipping
hazard during loading.
Use a transport vehicle rated to carry the mass of
the wheel loader and attachments.
Confirm that the transport vehicle is serviceable
for the transport task.
Move the loader slowly and follow directions from
people assisting with loading and alignment on the
transport vehicle.
Install the frame articulation lock.
Secure the wheel loader to the transport per the
instructions in Section 9 »Securing the Loader«
on page 137.
Loader Tie-Down
NOTICE
Failure to securely bind the loader to the transport
can cause the loader to shift. This can lead to instability in the behavior of the transport or the wheel
loader being lost from the transport.
Confirm that the articulation frame lock is correctly
installed.
Use wheel chocks to prevent the loader from slipping or rolling away.
Tie down the loader only to the special attachment
points as depicted in Fig. 66.
Use tie down devices with OSHA or DOT ratings for
the mass of the wheel loader and attachment.
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Use the attachment points (Fig. 65) marked with labels (Fig.
64) to tie down the loader.
Fig. 64
Tie down point label
Fig. 65
Tie down points
front
rear
131
132
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Fig. 66
Tying down the
loader
L owering loader arms
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7
133
Lowering loader arms
Warning
Personal injury or equipment damage hazards.
In the event the engine stops and can not be restarted
with the loader lift arms elevated:
• Lower the loader lift arms and attachment until they
rest on the ground or work surface.
The same procedure shall be used if the hydrostatic
propulsion system stops responding.
In the event of a working hydraulic system failure:
• Lower the loader lift arms and attachment as quickly
and safely as possible.
If a hydraulic hose fails:
• Avoid contact with the oil stream. Working hydraulic
oil can exceed 93°C (200°F) causing severe burns.
High pressure oil streams can penetrate the skin
causing serious injury.
• Relieve working circuit pressure by activating the
control through the full stroke range several times.
Loaders equipped with a load holding control device in
compliance with ISO8643 will stop the loader lift arms
from falling more than 15cm (6”) before stopping if a
hose or hydraulic line suffers a rupture and rapid leak.
Refer to Section 8 »Relieving residual pressure in the
hydraulic system« on page 134.
Emergency lowering for loaders with electrically unlockable lowering brake valves if the
engine fails:
1. Switch the starting key on (indicator lights must illuminate).
2. Activate the switch for float position item 1 (Fig. 67).
3. Lower the loader lift arms and the attachment by actuating the control lever.
Fig. 67
Emergency lowering
of the loader lift arms
1
134
Relieving residual pressure in the hydraulic system
8
Relieving RESIDUAL PRESSURE IN THE HYDRAULIC SYSTEM
WARNING
Personal injury hazard.
A fine jet of hydraulic fluid under high pressure
can pierce the skin. Seek medical assistance immediately if you get hydraulic fluid in your eyes or
on your skin.
►► Open only unpressurized hydraulic systems.
Residual hydraulic pressure can still be present in
the working hydraulic circuits after the loader lift
arms and attachment are resting on the ground
or working surface.
►► Do not attempt repair work on hydraulic circuits until the temperature of the components
is comfortable to touch (typically less than 49°C
(120°F)).
Since the loader lift arms and the attachment can
only be actuated within a limited time of the engine
failing, you must lower the loader lift arms as far as
it will go and relieve the pressure in the hydraulic
circuits immediately upon discovering that the engine or the hydraulic system has failed.
Proceed as follows to reduce the residual pressure in the
hydraulic circuits (adhere to the order of the individual work
steps):
1. Lower the loader lift arms as far as they will go.
2. Stop the engine.
3. Immediately after turning off the engine, actuate all the
control levers and pedals for the hydraulic system several
times in all directions.
4. Relieve the hydraulic reservoir by opening the filler neck,
illustration 1 (Fig. 68).
5. Remove the preload from the drive‘s system by opening
the return filter, illustration 2 (Fig. 68).
Relieving residual pressure in the hydraulic system
WL50
Opening the load holding control valves
Fig. 68
Reducing residual
pressure
WARNING
Personal injury hazard.
A fine jet of hydraulic fluid under high pressure can
pierce the skin.
►► Seek medical assistance immediately if you get
hydraulic fluid in your eyes or on your skin.
Illustration 1
Only trained personnel may open the load holding
control valves.
After maintenance/repairs, close the load holding control valves again and return them to their
original state.
Illustration 2
135
136
Relieving residual pressure in the hydraulic system
Fig. 69
Load holding control
valve
1
2
For loaders with load holding control valves on the lifting
and attachment cylinder, open the valves (Fig. 69).
1. Unscrew the nuts Item 1
2. Unscrew the screw Item 2 until the loader lift arms slowly
lowers.
• Should the loader lift arms not lower due to friction or
insufficient mass, you will have to augment the process
using a control cable or ratchet straps.
3. Screw the screw Item 2 back in as soon as the loader
lift arms is completely lowered and retighten the nuts
Item 1.
For machines with load holding control valves on the lifting
and attachment cylinder which can be electrically unblocked,
the engine starter must be turned on and the switch for
unblocking actuated so that the work equipment can be
lowered to the ground.
SECURING THE LOADER
WL50
9
137
SECURING THE LOADER
The following instructions apply to stopping and
parking the loader after daily operation, transporting the loader and to all servicing, inspection and
repair work.
• Place the loader on an even, dry surface that can support sufficient weight.
• Lower the loader lift arms.
• Engage the parking brake and stop the engine.
• Switch off all electrical switches.
• Relieve the pressure in all hydraulic circuits by cycling
the controls after the engine has stopped.
• Secure the loader with the wheel chock.
• Clean dirt off the loader.
• Perform a visual inspection to make sure there are no
leaks:
--in the hydraulic system
--in the cooling system
--in the fuel system
• Perform a visual inspection for damage to the loader,
especially on the tires, attachments and locking mechanism for the attachments.
• Fill the fuel reservoir and check the operating level of
the other fluid reservoirs after the temperature has been
reduced to a level that is comfortable to touch.
• Secure the loader against unauthorized use:
--Remove the starting key
--Close the windows, doors, reservoir lid and engine enclosure.
138
SERVICING AND INSPECTION
10
SERVICING AND INSPECTION
10.1 Basic safety instructions for servicing and inspection
Operator’s Manual
Personnel
• Perform servicing and inspection work only if you have
read and understood the Operator’s Manual.
• Observe the basic safety instructions and all the warning
signs attached to the loader.
• The Operator’s Manual describes the work to be performed. However, the descriptions of work processes
provide the necessary instructions only for experienced
specialized technicians.
• Keep the Operator’s Manual with the loader at all
times.
• Maintenance and inspection personnel must have specialized knowledge of servicing and inspection work
on the loader. The specialized knowledge required can
be obtained at training sessions from Wacker Neuson
Service.
• Perform servicing and inspection work only with suitable
work clothing and personal protective equipment.
• Wear hearing protection should there be noise exceeding 90 dbA.
SERVICING AND INSPECTION
WL50
Securing the loader and attachment
• Perform servicing and inspection work only if the loader is secured as described in the chapter »Securing
the loader«.
• Crushing hazard. An improperly supported loader lift arm may fall unexpectedly.
• Do not perform maintenance or service tasks under raised loader lift arms until the loader lift arm support
device (ISO10533) has been inserted and locked between the hydraulic lift cylinder end and the loader lift
arm to prevent any movement of the loader lift arms during maintenance and service.
• Extensive repair information is provided in the separate Repair Manual.
• Position the attachments on the ground so that no movements can occur when mechanical or hydraulic connections are released.
• Do not attempt any service repair requiring the technician to perform the work standing in the articulated
steering crush zone. Do not repair the hydraulic steering cylinders or remove the hydraulic lines until the
articulated frame lock has been installed to prevent inadvertent steering movement.
• Secure equipment or components that are to be attached or removed, or whose installation position is to be
changed, to prevent them from unintentionally moving, slipping or falling, by means of suitable lifting gear, or
suspension or support equipment.
• Clean dirt from steps and handles and keep them ready for use.
139
140
SERVICING AND INSPECTION
Handling combustible fluids
Tools
• Use diagnostic and repair tools that are in serviceable
condition and have been calibrated regularly to ensure
accuracy. Consult the Repair Manual for recommended
special tools necessary to safely complete the repair
task.
Cleaning
• Clean the machine before attempting to diagnose or repair the wheel loader.
• Do not use flammable solvents.
• Do not use cleaning agents that create harmful
vapors.
• Avoid any contact with electrical or rubber products when using water or steam.
• High pressure washers are not recommended
for cleaning the inside of the cab or the operator station.
• Wear appropriate protective clothing such as
goggles and gloves to supplement protective
clothing for the rest of the body.
Fire Hazard.
• Do not smoke when handling combustible fluids
and avoid fire or open flames.
• Do not use water to extinguish fires on the loader or burning fluids. Use suitable extinguishing
agents, such as powder, carbon dioxide or foam
extinguishers.
• Always call the fire department in the event of
a fire.
SERVICING AND INSPECTION
WL50
Residual pressure in the hydraulic system
Personal injury hazard.
• Pressurized jets of fluid can penetrate human skin.
• In the event that oil penetrates the skin, seek immediate medical attention to reduce the risk of infection and
complications from infection.
• Confirm that the hydraulic system pressure has been relieved before attempting to repair the system or
component.
• Even for a loader parked on a horizontal surface with its loader lift arms completely lowered and engine turned
off, there can still be considerable residual pressure in parts of the hydraulic system.
• Residual pressure reduces gradually at first. If a hydraulic system is to be opened immediately after being
shut down, the system shall be relieved before repairs are attempted. Do not attempt to work on the system
if the components are not comfortable to touch. Hot surfaces and liquids can cause severe burns.
• For loaders with load holding control devices on the lifting and/or tipping cylinder, you must open the valves
as described in Section 8, page 134 »Relieving residual pressure in the hydraulic system« in order to lower
the loader lift arms.
141
142
SERVICING AND INSPECTION
Handling fuel, oil and grease
Burn hazard.
• The operating temperature of the engine and
hydraulic system fluids exceeds 93°C (200°F).
Contact with human skin will cause severe
burns.
• Do not touch hot fluid.
• In the event of contact with hot fluid seek emergency room treatment immediately.
• Avoid skin and eye contact with oils and greases.
Wear protective gloves and safety goggles.
• Do not use fuel or solvents to clean your skin.
• Eliminate any oil or fuel leaks immediately.
• Avoid environmental damage. Do not allow oil
and oil-containing waste to spill on the ground
or get into bodies of water!
• Immediately soak up with binding material any
oil or fuel that has leaked, and dispose of it
separately from other waste in an ecologically
sound manner.
• Even biodegradable »environmentally friendly«
oil must be disposed of separately, just like other
oil.
Threaded connections, pipes, hydraulic hoses
WARNING
Personal injury hazard.
• Pressurized jets of fluid can penetrate human
skin.
• In the event that oil penetrates the skin, seek
immediate medical attention to reduce the risk
of infection and complications from infection.
• Do not use your hands to look for leaks. To look
for leaks, use a piece of cardboard or paper on
which you can identify oil which has escaped.
• Eliminate any leaks in the hydraulic fittings, hoses or
steel conduits immediately.
• Do not repair damaged pipes and hydraulic hoses; rather,
replace them immediately with new ones available from
your Wacker Neuson dealer even if only moisture penetration is visible.
SERVICING AND INSPECTION
WL50
Batteries
Personal injury hazard. Battery acid is corrosive to
metallic surfaces and harmful to human skin.
• Wear protective clothing, goggles and gloves
when working near batteries.
• If battery acid contacts the skin, wash immediately in clear water.
• Seek the advice of a doctor for treatment of
skin burns.
• In the event acid contacts eyes, rinse immediately with clear water and seek immediate
medical attention.
Explosion hazard.
A rapidly discharged battery vents explosive gases.
• Do not use open flames or smoke near batteries. -Use particular caution to vent the battery
storage area well to avoid gas accumulation.
• Follow jump start procedures to reduce the potential for arcing when the cables are connected
and disconnected.
• Do not place metallic objects on or near the
battery terminals to avoid short circuits from
contact with both poles of the battery. This will
generate extreme heat and potentially ignite
explosive battery gases.
• Always take off jewelry and metal watches before working on the battery or the electrical system.
• Dispose of old batteries in an ecologically sound way,
separate from other waste.
143
144
SERVICING AND INSPECTION
Engine exhaust fumes
• Diesel engine exhaust fumes are harmful. Do
not inhale exhaust gas. Do not operate the
wheel loader in a closed space.
• For servicing and inspection work performed
in a closed space, extract the exhaust fumes
using an extraction system and ventilate the
space well.
Electrical system
• Always observe the correct order when disconnecting
the battery.
--Disconnecting: First the negative pole and then the positive pole.
--Connecting: First the positive pole and then the negative pole.
• Always disconnect the battery before working on the
electrical system if tools, spare parts, etc. with electrical
components or contacts could touch it.
• Always disconnect the battery before welding.
WL50
After maintenance
• After completing maintenance and inspection work, always reattach all the safety devices.
• Do not start the engine until the loader is no longer being
worked on and everyone has left the danger area.
• Only start the engine from the operator’s seat.
• Perform a functional test with the loader after completing
servicing and inspection work.
SERVICING AND INSPECTION
145
146
SERVICING AND INSPECTION
10.2 Servicing and inspection intervals
Daily servicing
Perform the following tasks:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Clean the machine
Clean the air filter
Check for general damage
Check the coolant level/condition
Check the engine oil level/condition
Check the engine leakage
Check the hydraulic fluid level
Check the hydraulic system
Check the brake fluid level
Check the condition of the tires and the tire pressure
Make sure all fasteners are tight
Check the wheel bolts
Check that the brake system is functional
Check the windshield washer system
• Check the seat belt
• Check the instruments, indicator lights and audible warning devices
• Check the electrical system
• Check the foot brake
• Check the hydraulic steering
• Check that the hydraulic power units are functional
• Check the attachments
• Check the exhaust pipe for defects or excessive smoke
emission
• Grease lubrication according to lubrication drawing
• Grease the tools
• Check ROPS structure (all mounting bolts must be present and tightened)
WL50
SERVICING AND INSPECTION
Weekly servicing
Perform the following tasks:
• Clean fuel filter for the presettling reservoir (if present)
• Check axles for leaks
• Check hydraulic fluid cooler and water radiator for leaks
and dirt
• Check exterior condition of the radiators, i.e. the hoses
• Check the tension and condition of the fan belt
• Check the acid level of the battery
• Check the attachments
• Check the piston rods for the hydraulic cylinders
• Check the routing of the hoses and pipes
• Check the air filter hose
• Check the routing of the electrical wiring (rubbing/damage)
• Oil lubrication for all the levers
• Oil lubrication for all the cables and hinges
• Retighten all the screws
• Observe in particular the engine suspension and the
axle mounting
• Perform the general safety check
147
148
SERVICING AND INSPECTION
First inspection after 50 operating hours
Maintenance and inspection personnel must have
specialized knowledge of servicing and inspection
work on the loader.
Follow the Operator’s Manual for the engine.
To assure proper functioning of the machine, it is
required that the first inspection be performed after
50 operating hours, but at the latest 3 months after
initial start-up, by a Wacker Neuson dealer or a
mechanic at a Wacker Neuson factory agent.
Tasks to be performed (check)
Check the transmission, engine and hydraulic system for leaks
Check the hydraulic, engine coolant and engine oil coolers for dirt
Check the coolant level and antifreeze
Check the tension and condition of the V-belt
Make sure all hoses and pipes fit tightly
Check the routing of the hoses and pipes
Check the piston rods for the hydraulic cylinders for damage or dirt
Check the routing of the bowden cables and electrical wiring
Retighten all the fasteners. Observe in particular the engine suspension, axle mounting and drive shaft
Check: Instruments + audible warning devices
50 hours inspection
WL50
Tasks to be performed (check)
Check the electrical system
Check the foot brake and parking brake, adjust if necessary
Check the hydraulic steering
Check the lighting system (if present)
Check the idle speed
Check the valve clearance, adjust if necessary (only Perkins 1004-4)
Check the functioning of the door and engine enclosure mechanisms
Check ROPS / cab
Check the condition of the tires
Change the engine oil and filter
Clean the air filter, replace if necessary
Change the hydro return filter
Have all the grease nipples been lubricated? Lubricate if necessary
Lubricate the drive shafts (universal joint)
Lubricate all the levers, cables and hinges with oil
Check all oil levels, also the transmission and axles.
SERVICING AND INSPECTION
50 hours inspection
149
150
SERVICING AND INSPECTION
Inspection after 500 operating hours
Maintenance and inspection personnel must have
specialized knowledge of servicing and inspection
work on the loader.
Follow the Operator’s Manual for the engine.
This inspection is performed once after the first
500 operating hours. Should the loader not reach
500 operating hours during the first year of operation, perform this inspection once 12 months after
starting up the loader.
Tasks to be performed (check)
Check transmission, engine and hydraulic system for leaks
Check the hydraulics, water and hydraulic fluid radiators for dirt
Check the coolant level and antifreeze
Check the tension and condition of the V-belt
Check the routing of hoses and pipes
Check the piston rods for the hydraulic cylinders
Check the air filter hose
Check routing of bowden cables and electrical wiring
Retighten all the fasteners. Observe in particular the engine suspension, axle mounting and drive shaft
Check the engine suspension‘s rubber pad
500 hours inspection
WL50
Tasks to be performed (check)
Check the acid level of the battery
Check: Instruments, indicators + audible warning devices
Check the electrical system
Check the foot brake and parking brake, adjust if necessary
Check the hydraulic steering
Check the lighting system – (if present)
Check the exhaust system
Check the hinge pins and joint bushings
Check the center pivot bolts and bearings
Check the idle speed
Check the functioning of the engine enclosure and door locking mechanisms, adjust if necessary
Check the condition of the tires and the tire pressure
Change the engine oil and filter
Change the fuel filter – clean the pre-filter
Clean the fuel feed pump (Deutz engines only)
Clean the air filter, replace if necessary
SERVICING AND INSPECTION
500 hours inspection
151
152
SERVICING AND INSPECTION
Tasks to be performed (check)
Set the valve clearance
Change the hydraulic fluid
Change the hydro return filter
Change the hydro pressure filter
Change the oil in the transfer case
Change the oil in the axles
Are all the grease nipples lubricated? Lubricate if necessary
Lubricate the drive shafts
Lubricate all the levers, cables and hinges with oil
Check all the oil levels
The following inspection intervals apply after this inspection:
500 hours inspection
SERVICING AND INSPECTION
WL50
Inspection intervals
Maintenance and inspection personnel must have
specialized knowledge of servicing and inspection
work on the loader.
Follow the Operator’s Manual for the engine.
Perform the maintenance work listed in the inspection schedule depending on which interval has been
reached first, that is, if either the number of operating hours have been reached or the time specified
in the schedule has elapsed.
At the end of the Operator’s Manual you will find the
form »Inspection verification«, in which the inspections to be performed must be recorded.
153
154
SERVICING AND INSPECTION
Operating hours:
250, 750, 1000,
1250, 1750,
2000, 2250,
2750, 3000, etc.
Operating
hours: 1500,
2500, 3500,
4500, etc.
Check transmission, engine and hydraulic system for leaks
X
X
X
X
Check the hydraulic and water radiators for dirt
X
X
X
X
Work to be performed
monthly
annually
Check the coolant level and antifreeze
X
X
X
X
Check the tension and condition of the V-belt
X
X
X
X
Check the routing of hoses and pipes
X
X
Check the piston rods for the hydraulic cylinders
X
X
Check the air filter hose
X
X
X
X
Check routing of bowden cables and electrical wiring
X
X
Retighten all screws, observing in particular the engine suspension, the
axle mounting and the drive shaft
X
X
Check the acid level of the battery
X
Clean the battery terminals/check the acid density
Check: Instruments, indicators + audible warning devices
X
X
X
X
X
X
X
X
X
Check the electrical system
X
X
X
X
Check the foot brake and parking brake, adjust if necessary
X
X
X
X
Check the hydraulic steering
X
X
X
X
SERVICING AND INSPECTION
WL50
Work to be performed
Check the lighting system – (if present)
Operating hours:
250, 750, 1000,
1250, 1750,
2000, 2250,
2750, 3000, etc.
Operating
hours: 1500,
2500, 3500,
4500, etc.
X
X
monthly
X
annually
X
Check the exhaust system
X
X
Check the hinge pins and joint bushings
X
X
Check the center pivot bolts and bearings
X
X
Check the pressure relief valves in the hydraulic system
Check the idle speed
X
X
X
X
X
X
Check max. speed when loaded and unloaded
X
X
Check the starter and alternator (engine manual)
X
X
Check the heater plugs and fuel injectors (engine manual)
X
X
Check the valve clearance, adjust if necessary
X
For Deutz engines: Check the timing belt for engine timing and, if available, for auxiliary drive system (do not retighten, change every 5 years or
after 4500 op. hours)
X
X
Check the fuel injectors (every 3000 operating hours)
Check the functioning of the engine enclosure locking mechanism, adjust
if necessary
X
X
X
X
155
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SERVICING AND INSPECTION
Work to be performed
Operating hours:
250, 750, 1000,
1250, 1750,
2000, 2250,
2750, 3000, etc.
Check ROPS/FOPS structures
Operating
hours: 1500,
2500, 3500,
4500, etc.
monthly
X
annually
X
Check the condition of the tires and the tire pressure
X
X
Change the engine oil and filter
X
X
X
X
X
Change the fuel filter – clean the pre-filter
Clean the fuel feed pump (for Deutz engines)
Clean the air filter, replace if necessary
X
X
X
X
X
X
X
X
Change the hydraulic fluid
X
X
Change the hydro return filter
X
X
Change the oil in the transfer case
X
X
Change the oil in the axles
X
X
Pressure filter (first change after 500 op. hours, further changes as
needed)
Change the coolant – every 2 years
Are all the grease nipples lubricated? Lubricate if necessary
X
X
X
X
Lubricate the drive shafts (universal and slip joint)
X
X
X
X
Lubricate all the levers, cables and hinges with oil
X
X
X
X
SERVICING AND INSPECTION
WL50
Work to be performed
Operating hours:
250, 750, 1000,
1250, 1750,
2000, 2250,
2750, 3000, etc.
Check all the oil levels
X
Inspect according to the accident prevention regulations
Operating
hours: 1500,
2500, 3500,
4500, etc.
monthly
annually
X
X
Valve clearance for Perkins 400 series: 0.2 mm (0.008”) inlet and outlet for a cold engine
Valve clearance for Perkins 1000 series: 0.2 mm (0.008”) inlet and 0.45 mm (0.04”) outlet for a cold engine
Valve clearance for Deutz 2011 series: 0.3 mm (0.012”) inlet and 0.5 mm (0.04”) outlet for a cold engine
X
157
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SERVICING AND INSPECTION
10.3 Lubrication schedule
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Fig. 70
Points of lubrication
15
16
17
18
19
20
21
22
23
24
SERVICING AND INSPECTION
WL50
Item Point of lubrication
Nipples
Item Point of lubrication
159
Nipples
1
Engine enclosure hinges
[2]
13 Bearing for reversing lever
[1]
2
Cab tilting hinge, rear
[1]
14 Tie rod, front
[1]
3
Door hinges
[4]
15 Cab tipping cylinder (under the cab)
[2]
4
Brake pedal bearing (in the cab)
[1]
16 Drive shaft, rear
[1]
Brake lever bearing (under the cab)
[1]
17 Center pivot bearing, top (remote lubrication)
[1]
5
Accelerator (in the cab)
[1]
18 Steering cylinder, rear (remote lubrication)
[1]
6
Cab tilting hinge, front
[1]
19 Center pivot lager, bottom
[1]
7
Center pivot bearing, top
[1]
20 Steering cylinder, front
[1]
8
Lifting cylinder, rear
[2]
21 Drive shaft, front
[1]
9
Arm, top
[2]
22 Tie rod, rear
[1]
10 Tipping cylinder, rear
[1]
23 Pivot point of tool attachment
[2]
11 Lifting cylinder, front
[2]
24 Tool locking bolts
[2]
12 Tipping cylinder, front
[1]
Lubricate all the points of lubrication daily with water-resistant multi-purpose grease. Lubricate all other moving parts
such as the handbrake lever, foot pedals, cables, etc. using the oil can.
160
SERVICING AND INSPECTION
10.4 Cleaning the loader
WARNING
Burn hazard.
High pressure water at the maximum recommended
temperature (80°C (176°F)) will cause severe burns
and is extremely hazardous if contact is made with
the eyes.
►► Wear protective clothing and safety goggles
while cleaning the machine.
Clean the wheel loader frequently, particularly the
access systems, to prevent slips and falls when
entering and leaving the operator station.
To avoid potential fires, remove flammable debris
and dust from the hot surfaces in the engine enclosure and hydraulic system.
NOTICE
• When cleaning the loader, pay particular attention to its underside. Do not allow mud to collect
on the engine and transmission.
• Make sure that the radiator is thoroughly clean
all over.
• Do not damage the radiator fins when cleaning
the radiator with a high-pressure cleaner.
• Always cover up the suction connection of the
air filter before washing the engine.
• Do not clean sensitive electrical components
(instrument panel, alternator, compact plug,
multi-function lever, etc.) with a high-pressure
cleaner.
SERVICING AND INSPECTION
WL50
When the loader is new (in the first three months),
only clean it with a sponge.
As the paintwork on the underside is not fully hardened, the paintwork can be damaged if cleaned
with a high-pressure cleaner.
Please note when cleaning the loader with a highpressure cleaner:
Maximum water pressure 130 bar (1885 psi).
Maximum water temperature 80°C (176°F).
When cleaning, do not hold the jets of the highpressure cleaner too close to the labels and other
sensitive parts, so that nothing gets damaged.
ENVIRONMENTAL NOTE
Avoid environmental damage.
Clean the loader only in a suitable place where the
waste water can be collected in an ecologically
sound manner.
Collect contaminated waste water and dispose of
it in an ecologically sound manner.
161
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SERVICING AND INSPECTION
10.5 General safety check
Immediately rectify any damage detected during
the safety check. Damaged parts must be immediately repaired or replaced. Do not use the loader
again until the damage has been rectified professionally.
Check:
• all steel parts for damaged and loose screws/bolts, particularly the ROPS structure,
• the condition of the seat belt,
• the quick-change system for the attachments,
• that all the hinge pins are in the correct position and are
secured by their locking devices,
• that the step and handles are in good condition, clean
and fit well,
• cab windows for cracks and fractures,
• the condition of the reflectors and the lighting, including
the work lights,
• the tires for damage and any sharp-edged objects that
have penetrated them,
• the condition of all warning and message labels.
SERVICING AND INSPECTION
WL50
10.6 Specifications and filling quantities
When filling oil, the oil level must correspond to the
dip stick or control screw markings.
Item
Capacity in liters / gallons Fluid / grease nipple
Specification
Fuel reservoir
90
23.78
Diesel fuel
#1 or #2, see engine manual
Engine oil with filter
10,5
2.77
Engine oil SAE 10 W 40 Ambient temperature -20°C to +40°C (-4°F to +104°F)
API CG-4 / API CH-4
See engine manual
Cooling system contents
10
2.64
Water with conventional HD coolant /
antifreeze
HD coolant / antifreeze: ASTN
D4985
Front axle
Rear axle
4.2
4.9
1.11
1.29
Transmission oil SAE 90 GL 5
Complete hydraulic system
100
26.42
Hydraulic fluid HLP
ISO VG 46
Hydraulic reservoir
80
21.13
Hydraulic fluid HLP
ISO VG 46
Multi-purpose grease
water-resistant
Points of lubrication
Brake system
Air conditioning system
(optional equipment)
1
0.26
ATF oil
Coolant R134a
163
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SERVICING AND INSPECTION
10.7 Maintenance and inspection work
Perform maintenance and inspection work only if
the loader is secured as described in Section 9,
page 137 »Securing the loader«.
The operator cab/platform can be tilted for access
to the wheel loader systems for inspection, maintenance and repair. Refer to section 10.7.1. pages
164-168 for detailed instructions on how to tilt the
operator cab/platform.
10.7.1 Preparation for maintenance and inspection
work
Opening the engine enclosure
WARNING
Crushing/shearing hazard.
Moving engine parts can crush and cut.
►► Do not open the engine enclosure unless the
engine is stopped to avoid hazards from moving
objects (cooling fan and drive belts for the fan
and alternator).
WARNING
Burn hazard.
Engine components can get very hot during operation.
►► Do not touch the engine mass, exhaust system,
or cooling system immediately after stopping
the engine.
►► Wait until the stopped engine has cooled to the
point that the exhaust system, engine mass and
cooling system are comfortable to touch.
SERVICING AND INSPECTION
WL50
If the engine stops and can not be restarted from the operator position, check to determine if there is fuel in the fuel
reservoir. If fuel is not the problem, notify the supervisor
and wait for a qualified technician to diagnose and repair
the problem.
Fig. 71
Opening the engine
enclosure
Remove all tools and objects from the engine and
the engine compartment before closing the engine
enclosure.
–– Unlock the engine enclosure lock by pulling the opener
on the left behind the operator‘s seat Item 1 (Fig. 71).
–– Lift the engine enclosure. For lifting, use the handle to
the right or the left of the engine enclosure Item 2 (Fig.
71).
The engine enclosure lock automatically engages when the
engine enclosure is closed.
1
2
165
166
SERVICING AND INSPECTION
Tilting the operator’s platform
WARNING
Improperly tilting the cab can cause personal injury
or damage to equipment.
►► Before tilting the cab remove loose objects from
the cab to avoid control/indicator damage.
►► Close and confirm that the doors are latched
►► Do not attempt to tilt the cab until the wheel loader has cooled to the point that the engine and
hydraulic system are comfortable to touch.
►► Do not remove the bearing plate from the loader
rear frame member.
►► Do not operate the wheel loader until the cab
has been rigidly bolted to the main frame.
►► Tilt the cab slowly and keep hands and arms
clear of pinch points.
NOTICE:
Avoid damage to the cab doors.
Either close the doors or remove them.
1. Remove any loose objects from the operator’s platform.
2. Make sure there is sufficient room to the right of the
loader.
3. Remove the two mounting bolts from the support bracket
on the left of the operator’s platform (Fig. 72).
4. Close the cab doors.
5. Open the engine enclosure.
6. Remove the pump lever Item 1 (Fig. 73) from the holder
and insert it in the opening in the hand pump Item 2
(Fig. 73).
7. Move the switch lever for the pump Item 3 (Fig. 73) to
the right (arrow pointing upwards).
8. Now pump in order to tilt the operator’s platform.
SERVICING AND INSPECTION
WL50
Fig. 72
Position of the cab
mounting bolts
1
Fig. 73
Tilting the cab
2
3
167
168
SERVICING AND INSPECTION
Fig. 74
Cab safety support
1
Lowering the operator’s platform:
1. Move the switch lever for the pump Item 3 (Fig. 73) to
the left (arrow pointing downwards).
2. Put the pump lever Item 1 (Fig. 73) into the intended
opening in the hand pump Item 2 (Fig. 73).
3. Release the locking of the operator’s platform safety
supports by pulling the loop Item 1 (Fig. 74).
4. Now pump in order to lower the operator’s platform.
5. Re-install in the mounting bolts immediately after lowering the operator’s platform back in place.
SERVICING AND INSPECTION
WL50
10.7.2 Servicing the engine
WARNING
Shearing, pinching, and crushing hazards exist
when the engine is running.
►► Do not open the engine enclosure until the engine has stopped.
Burn hazard.
The engine, engine exhaust and cooling system
exceed 93°C (200°F) at operating temperature.
Touching the engine compartment components
can cause severe burns.
►► Stop the engine and wait until the engine compartment components are cool enough to touch
before performing service work.
Checking the engine oil level
The engine lubricating oil dipstick is located on
the left side of the engine facing the direction of
machine travel.
Check the oil level (Fig. 75, location 1) according to the maintenance schedule and confirm that
the level is between the minimum and maximum
marks.
If the level is at or below the minimum level add the
specified oil (Fig. 75, location 2) before operating
the engine.
Do not exceed the maximum engine oil level when
adding lubricating oil to the engine. Excessive oil
levels can cause engine damage.
169
170
SERVICING AND INSPECTION
2
1. Stop the loader on a horizontal surface and set the parking brake.
2. Lower the loader lift arms and attachment to the ground
or working surface.
3. Stop the engine.
4. Wait until the engine has cooled and the dipstick is comfortable to touch.
5. Open the engine enclosure.
6. Pull out the dip stick (left side of the engine; Item 1 Fig.
75).
7. Wipe the dip stick with a clean, lint-free cleaning rag.
8. Put the dip stick back in.
9. Pull the dip stick out again.
10.Check the oil level. The oil level must be between the
»minimum« and »maximum« marks.
11.Put the dip stick back in after checking the oil level.
Fig. 75
Checking the
engine oil / filling
the oil
1
SERVICING AND INSPECTION
WL50
Adding engine oil
Use the correct oil grade (see Section 10.6, page
163 »Specifications and filling quantities«).
Use a funnel with tube extension as aid for filling.
If the fluid level is under the »Maximum« mark, the fluid
must be added:
1.
2.
3.
4.
Open the oil filler neck Item 2 (Fig. 75).
Add the engine oil.
Check the oil level.
Add engine oil until the oil level is at the »Maximum«
mark.
5. Close the oil filler neck Item 2 (Fig. 75).
Changing the engine oil
WARNING
Burn hazard.
The operating oil temperature in the diesel engine
is more than 93°C (200°F). Skin contact with hot
oil will result in severe burns.
►► Stop the engine and wait until the engine oil
drain plug is comfortable to touch before draining the oil.
Refer to Section 10.6, page 163 »Specifications and
filling quantities« for replacing the drained engine
lubricating oil.
ENVIRONMENTAL NOTE
Avoid environmental damage.
Collect old engine oil in a large enough container
to avoid spillage and dispose of it in an ecologically
sound manner.
171
172
SERVICING AND INSPECTION
1. Bring the engine to operating temperature and allow to
cool until the drain plug is comfortable to touch.
2. Stop the loader on a horizontal surface and set the parking brake.
3. Lower the loader lift arm and attachment to the ground
or working surface.
4. Stop the engine.
5. Place a container with sufficient volume to avoid spillage
under the drain opening.
6. Remove the sealing plug Item 1 and attach the supplied hose Item 2 (Fig. 76). The oil will now flow out of
the engine.
Fig. 76
Engine oil drain
opening
Engine oil drainage
hose
1
2
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SERVICING AND INSPECTION
Changing the engine oil filter
Once the engine oil has been drained:
1. Change the engine oil filter (see the section »Changing
the engine oil filter«).
2. Unscrew the supplied hose Item 2 (Fig. 76) and screw
the sealing plug back in.
3. Open the oil filler neck Item 2 (Fig. 75):
4. Add engine oil until the oil level has reached the »Maximum« mark.
5. Start the engine and let it idle until the engine oil indicator light goes out.
6. Check the oil level and, if necessary, fill to the »Maximum« mark.
7. Close the oil filler neck Item 2 (Fig. 75):
8. Dispose of the old engine oil in an ecologically sound
manner.
WARNING
Burn hazard.
The operating oil temperature in the diesel engine
is more than 93°C (200°F). Skin contact with hot
oil will result in severe burns.
►► Stop the engine and wait until the engine oil
drain plug is comfortable to touch before draining the oil.
The engine oil filter contains a bypass valve that
opens when the filter is clogged.
ENVIRONMENTAL NOTE
Avoid environmental damage.
Collect old engine oil and dispose of it in an ecologically sound manner.
173
174
SERVICING AND INSPECTION
The engine oil filter is located on the left side of the engine
(Fig. 77).
1. Put a receptacle for draining oil under the engine oil
filter.
2. Unscrew the engine oil filter item 1 (Fig. 77):
3. Clean the sealing surface of the filter holder Item 2 (Fig.
77).
4. Lightly oil the rubber seal of the new engine oil filter
item 3 (Fig. 77).
5. Screw on the new engine oil filter until it stops against
the rubber seal.
6. Tighten the new engine oil filter by hand by another half
rotation.
7. Check the oil level and, if necessary, fill to the »Maximum« mark.
8. Dispose of the old engine oil filter in an ecologically
sound manner.
Fig. 77
Location of the
engine oil filter
2
1
3
SERVICING AND INSPECTION
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10.7.3 Servicing the fuel system
WARNING
Personal injury hazard.
Moving engine components can crush or cut. Hot
engine components can cause serious burns.
►► Do not open the engine enclosure until the engine stops.
►► Do not touch engine components until they have
cooled.
Fire/explosion hazard.
Fuel and fumes can explode or catch fire.
►► Do not smoke or change the fuel filter near an
open flame.
►► Do not mix gasoline with diesel fuel.
Service the fuel system according to the inspection
intervals specified in this Operator’s Manual.
Use only clean, high-grade diesel fuel. Do not use
gasoline.
After working on the fuel system, clean the engine
and engine bearings thoroughly from any fuel that
may stick.
Always replace all the fuel filters at the same
time.
ENVIRONMENTAL NOTE
Avoid environmental damage.
Collect leaking fuel and dispose of it in an ecologically sound manner.
175
176
SERVICING AND INSPECTION
Fuel system
Servicing the water separator
The fuel filtration system consists of a pre-filter (2) and a
main filter (3). The fuel is pumped by means of a feed pump
(F), which is flanged to the engine block. The fuel filter as
well as the pre-filter and the feed pump are located on the
left-hand side of the engine.
1. Place a receptacle under the water separator Item 1
(Fig. 79).
2. Unscrew the drain plug from the inspection glass Item
a (Fig. 79).
3. The collected water now runs out.
4. Retighten the drain plug when the collected water has
run out.
5. Venting the fuel system.
3
Fig. 78
Position of the fuel
filters
F
Fig. 79
Water separator
1
2
a
SERVICING AND INSPECTION
WL50
Changing the fuel pre-filter
The fuel pre-filter Item 2 (Fig. 78) can only be replaced in conjunction with the entire housing.
1.
2.
3.
4.
5.
6.
7.
Place a receptacle under the fuel pre-filter.
Remove the hose clamps from the fuel pre-filter.
Disconnect the fuel hoses.
Replace the fuel pre-filter.
Connect the fuel hoses.
Attach the hose clamps for the fuel pre-filter.
Venting the fuel system.
177
Changing the main fuel filter
1. Place a receptacle under the main fuel filter Item 3 (Fig.
78).
2. Unscrew the main fuel filter.
3. Clean the sealing surfaces of the filter base Item a (Fig.
80).
4. Wet the seal of the new filter cartridge with diesel fuel
Item b (Fig. 80).
5. Screw on the new filter cartridge.
6. Venting the fuel system.
Fig. 80
Main fuel filter
a
b
3
178
SERVICING AND INSPECTION
Venting the fuel system
1. Fill the fuel reservoir.
2. Open the engine enclosure.
3. Pump with the hand-feed pump (Fig. 81) until you feel
resistance. Then pump 3 or 4 more times.
4. The engine can now be started.
Fig. 81
Fuel hand-feed
pump
SERVICING AND INSPECTION
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10.7.4 Servicing the air filter system
The loader is equipped with a dry air filter for filtering the
engine intake air. The dry air filter consists of a main filter
and a safety filter element. To access the dry air filter, open
the engine enclosure.
WARNING
Crushing/shearing hazard.
Moving engine parts can crush and cut.
►► Do not open the engine enclosure unless the
engine is stopped to avoid hazards from moving
objects (cooling fan and drive belts for the fan
and alternator).
Burn hazard.
Engine components can get very hot during operation.
►► Do not touch the engine mass, exhaust system,
or cooling system immediately after stopping
the engine.
►► Wait until the stopped engine has cooled to the
point that the exhaust system, engine mass and
cooling system are comfortable to touch
Service the air filter according to the inspection
intervals specified in this Operator’s Manual.
Dirty, contaminated air entering the engine will
cause damage and reduce performance.
Never let the engine run if parts of the air intake
system are removed.
Replace damaged air filters immediately.
179
180
SERVICING AND INSPECTION
Air filter dust valve
Check main air filter element / clean / replace
Check if the outlet slot on the dust valve Item 1 (Fig. 82) is
clear. Remove dust accumulation by pinching the valve.
Clean or replace the main filter element Item 1
(Fig. 83) during inspections or if the indicator light
for the air filter on the instrument panel is illuminated between inspection intervals Item 12 (Fig.
13, page 50).
2
Fig. 82
Location of the air
filter
Fig. 83
Air filter elements
2
1
1
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SERVICING AND INSPECTION
181
Checking / changing the safety filter
1. Remove the fasteners on the cover Item 2 (Fig. 82) and
take off the cover.
2. Remove the main filter element Item 1 (Fig. 83). Do not
remove the safety filter element in the process.
3. Perform a visual inspection of the intake manifold between the filter and the engine for leaks and tight fit. The
intake manifold must not display any exterior damage.
4. Clean the main filter element (knock off lightly and blow
out with compressed air from the inside to the outside).
Should the main filter element be too dirty or damaged,
replace it.
Install a new or cleaned main filter element, repeating the
steps in the reverse order.
After a new or a cleaned main filter element has been installed, the indicator light in the instrument panel Item 12
(Fig. 13) should no longer light when the engine is running.
Should this nevertheless be the case, replace the safety
filter.
Replace the safety filter if necessary, and at least
after cleaning the main filter for the fifth time.
Should it be apparent while servicing the dry air filter that
a maintenance fault was present or that the main filter element is damaged, replace the safety filter element Item 2
(Fig. 83).
1. Remove the three fasteners on the cover Item 2 (Fig.
82).
2. Remove the cover Item 2 (Fig. 82):
3. Pull out the main filter element Item 1 (Fig. 83).
4. Pull out the safety filter element Item 2 (Fig. 83).
5. Insert a new safety filter element..
Assembly takes place in the reverse order.
182
SERVICING AND INSPECTION
10.7.5 Servicing the cooling system
The radiator is installed behind the diesel engine (Fig. 86).
One part cools the hydraulic fluid, while the other part cools
the engine.
WARNING
Crushing/shearing hazard.
Moving engine parts can crush and cut.
►► Do not open the engine enclosure unless the
engine is stopped to avoid hazards from moving
objects (cooling fan and drive belts for the fan
and alternator).
Burn hazard.
Engine components can get very hot during operation.
►► Do not touch the engine mass, exhaust system,
or cooling system immediately after stopping
the engine.
►► Wait until the stopped engine has cooled to the
point that the exhaust system, engine mass and
cooling system are comfortable to touch.
Service the cooling system according to the inspection intervals specified in this Operator’s Manual.
Stop the engine immediately if the temperature
indicator in the instrument panel Item 6 (Fig. 13,
page 48) is illuminated.
If the temperature indicator is illuminated, either
the engine or the hydraulic oil or both have become
too hot.
WL50
The temperature indicator light Item 6 (Fig. 13, page 48) is
connected to two temperature sensors. One is located on
the engine (Fig. 84), the other on the hydraulic oil reservoir
(Fig. 85). To ascertain whether the engine or hydraulic oil
(or both) have become too hot, disconnect the cable on one
of the two temperature sensors.
SERVICING AND INSPECTION
Fig. 84
Engine temperature
sensor
In the event of cooling system overheating, check the following:
• Is there enough coolant in the radiator and is it the correct coolant mix?
• Is the fan‘s V-belt taut and in good condition?
• Is the radiator air flow restricted?
Fig. 85
Hydraulic oil temperature sensor
183
184
SERVICING AND INSPECTION
Checking the coolant level / refilling the coolant
WARNING
Burn hazard.
Hot fluid (exceeding 93°C (200°F)) will spray under pressure. Contact with skin will cause severe
burns.
►► Do not remove the radiator cap if the engine is
at operating temperature.
Poison hazard.
Coolant can be harmful or fatal if swallowed.
►► If hot coolant makes contact with the skin or
eyes, rinse immediately with clear water and
seek immediate medical attention.
►► If coolant is swallowed, seek immediate medical attention.
ENVIRONMENTAL NOTE
Avoid environmental damage.
Do not allow antifreeze and coolant to be released
uncontrollably into the environment.
Collect antifreeze and coolant and dispose of it in
an ecologically sound manner.
The coolant must consist of equal parts of water
and antifreeze. This mix guarantees an optimal ratio
of cooling performance and corrosion protection.
Do not pour in the coolant too quickly if the full
amount is to be poured in, e.g. when changing the
coolant.
Do not exceed a refill rate of 5 l/min (1.3 gpm) to
reduce the potential for air entrapment during filling.
Use the capacity guide on page 163. Fill until the
coolant is below the neck of the radiator cap spout.
Replace the cap and run the engine briefly.
Stop the engine and check the level. Add coolant
if the level has dropped.
SERVICING AND INSPECTION
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185
Checking the antifreeze mix
Check the coolant level at regular intervals. If you look into
the radiator opening (Fig. 86) from above, the radiator fins
should be covered with coolant.
Make sure that enough antifreeze is always present in the
coolant, even in summer, as antifreeze also prevents internal
corrosion of the radiator and the engine.
Fig. 86
Radiator opening
Antifreeze prevents the coolant from freezing at temperatures below zero and protects the engine block and the
radiator from internal corrosion. Under normal conditions,
the antifreeze concentration is sufficient for protection down
to between –20°C (–4°F) and –30°C (–22°F). You can determine the antifreeze concentration by using a conventional
antifreeze tester (Fig. 87).
Fig. 87
Checking the antifreeze mix
186
SERVICING AND INSPECTION
Changing the coolant
NOTICE
Replace the coolant after two years of use.
The coolant must consist of equal parts of water and
antifreeze. This mix guarantees an optimal ratio of
cooling performance and corrosion protection.
Do not exceed a refill rate of 5 l/min (1.3 gpm) to reduce the potential for air entrapment during filling.
Use the capacity guide on page 163. Fill until the
coolant is below the neck of the radiator cap spout.
Replace the cap and run the engine briefly.
Stop the engine and check the level. Add coolant if
the level has dropped.
1. Stop the loader on a horizontal surface and set the parking brake.
2. Lower the loader lift arms and attachment to the ground
or the work surface..
3. Stop the engine.
4. Refer to Section 10.6, page 163 for the volume of coolant and select a drain container of sufficient capacity
to avoid spillage.
5. Remove the radiator cap.
6. Remove the lower radiator hose (remove the hose clamp
and remove the hose).
After the coolant has drained completely, flush the system
with clear water and making certain to capture the drained
liquid in a container.
1. Correctly reattach the lower radiator hose.
2. Mix new coolant using equal parts of clean tap water
and new antifreeze.
3. Pour the new coolant into the radiator opening until the
radiator fins are covered with coolant. Do not add the
new coolant at a rate faster than 5 l/min (1.3 gpm) to
reduce the risk of air pockets in the cooling system.
4. Install the radiator cap.
5. Check the coolant level once again after half an hour
of operation.
SERVICING AND INSPECTION
WL50
187
Cleaning the cooling system
The greater the amount of dust in the air, the
more frequently the radiator has to be checked
and cleaned.
Always cover up the suction connection of the air
filter before cleaning the radiator.
Do not damage the radiator fins when cleaning
the radiator. Straighten any twisted radiator fins
carefully.
ENVIRONMENTAL NOTE
Avoid environmental damage
Clean the loader only in a suitable place where the
waste water can be collected in an ecologically
sound manner.
Collect contaminated waste water and dispose of
it in an ecologically sound manner.
Clean the dirty radiator with compressed air (Fig. 88). You
can also clean heavily contaminated radiators with water
under high pressure.
Clean
• the engine‘s radiator
• the hydraulic fluid cooler
• the alternator (with compressed air only!)
Fig. 88
Cleaning the cooling system
188
SERVICING AND INSPECTION
10.7.6 Servicing the hydraulic system
WARNING
Crushing/shearing hazard.
Moving engine parts can crush and cut.
►► Do not open the engine enclosure unless the
engine is stopped to avoid hazards from moving
objects (cooling fan and drive belts for the fan
and alternator).
Burn hazard.
The operating temperature of the hydraulic system is 93°C (200°F). Contact with skin will cause
severe burns.
►► Rinse with water immediately and seek medical
treatment.
Injury hazard.
High pressure hydraulic streams can penetrate
skin, resulting in infections.
►► If oil penetrates the skin, seek medical treatment
immediately.
►► If hydraulic fluid enters an eye, seek medical
attention immediately.
►► Use a piece of cardboard or heavy paper to
search for hydraulic system leaks
Open hydraulic systems only if they have been relieved of
pressure. Even if a loader is parked on a horizontal surface with its loader lift arms completely lowered and engine
turned off, there can still be considerable residual pressure
in parts of the hydraulic system. Residual pressure reduces
gradually at first. Should a hydraulic system be opened
immediately after shutting down, the system has to be depressurized as described in Section 8, page 134 »Relieving
residual pressure in the hydraulic system«.
Service the hydraulic system according to the
inspection intervals specified in this Operator’s
Manual.
Exercise extreme cleanliness when performing
service work on the hydraulic system. Impurities
in the hydraulic fluid in the form of dirt or water
can result in premature wear or failure of the entire
system.
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SERVICING AND INSPECTION
Hydraulic fluid cooler
The oil radiator is installed behind the diesel engine (Fig.
89). One part cools the hydraulic fluid, while the other part
cools the engine. Should the loader get too hot during long
drives on the road or at high outside temperatures, check
whether the fan‘s V-belt is taut and in good condition and
whether the radiator air flow is blocked.
Fig. 89
Hydraulic fluid
cooler
189
190
SERVICING AND INSPECTION
Ventilation filter / hydraulic fluid filler neck
Replace the ventilation filter after 1000 operating
hours.
The ventilation filter is located on the hydraulic fluid reservoir item 1 (Fig. 90). It ensures that the hydraulic reservoir
is ventilated and exhausted when the hydraulic fluid level
fluctuates. The air filter contains a filter element which prevents dust and dirt from penetrating and oil spillings from
escaping. The air filter has a valve that keeps the reservoir
pressure at approx. 0.5 bar (7 psi). This pressure will escape
if the hydraulic fluid filler neck is opened.
Checking the hydraulic fluid level
The hydraulic oil reservoir is located on the left side of the
rear frame. To access it, open the engine enclosure (reference Section 10.7.1, pages 164-168).
Never let the oil level drop below the »Minimum«
mark on the dip stick.
When adding oil, never let the »Maximum« mark
on the dip stick be exceeded.
Oil cloudiness means that water or air is in the
system, which could damage the hydraulic pump.
Contact trained specialized personnel to eliminate
the fault. Do not drive the loader until the fault has
been eliminated.
SERVICING AND INSPECTION
WL50
1. Stop the loader on a horizontal surface and set the parking brake.
2. Lower the loader lift arms and attachment to the ground
or work surface.
3. Stop the engine.
4. Remove the hydraulic oil filler neck Item 1 (Fig. 90) slightly so that the pressure can escape from the reservoir
before removing the cap completely.
5. The dip stick is located on the underside of the air filter.
Remove the dip stick (Fig. 91).
6. Wipe the dip stick with a clean, lint-free cleaning rag.
7. Put the dip stick back in.
8. Pull the dip stick out again.
9. Check the oil level. The oil level must be between the
»minimum« and »maximum« marks.
10.Put the dip stick back in after checking the oil level.
11.Close the hydraulic fluid filler neck item 1 (Fig. 90).
Fig. 90
Ventilation filter
1
Fig. 91
Hydraulic fluid dip
stick
191
192
SERVICING AND INSPECTION
Adding hydraulic fluid
Use the correct oil grade (reference Section 10.6,
page 163 »Specifications and filling quantities«).
Open the hydraulic oil filler neck cap Item 1 (Fig.
90) carefully so that the pressure can escape from
the reservoir.
If the fluid level is under the »Maximum« mark, add hydraulic
fluid until the maximum level is reached.
1. Open the hydraulic fluid filler neck cap Item 1 (Fig.
90).
2. Add hydraulic fluid.
3. Check the hydraulic fluid level.
4. Add hydraulic fluid until the fluid level is at the »Maximum« mark.
5. Close the hydraulic oil filler neck cap Item 1 (Fig. 90).
Changing the hydraulic fluid
WARNING
Burn hazard.
The operating temperature of the hydraulic system is 93°C (200°F). Contact with skin will cause
severe burns.
►► Wear protective clothing.
►► Rinse affected areas with water immediately
and seek medical treatment.
Refer to Section 10.6, page 163 »Specifications
and filling quantities« to determine the necessary
container volume to avoid spillage.
ENVIRONMENTAL NOTE
Avoid environmental damage.
Collect old hydraulic fluid and dispose of it in an
ecologically sound manner.
SERVICING AND INSPECTION
WL50
Fig. 92
Hydraulic fluid drain
plugs
1. Stop the loader on a horizontal surface and set the parking brake.
2. Lower the loader lift arms and attachment to the ground
or work surface.
3. Stop the engine.
4. Relieve residual hydraulic system pressure using the
procedure described in Section 8, page 134.
5. Refer to Section 10.6, page 163 »Specifications and
filling quantities« to determine the necessary container
volume to avoid spillage.
6. Remove the sealing plug (Fig. 92).
193
Once the hydraulic fluid has been drained:
1. Remove the filter insert Item b (Fig. 94).
2. Clean the reservoir bottom and reservoir interior with
hydraulic or detergent oil through the opening.
3. Replace the filter element of the return filter (see the
section »Changing the return filter element«).
4. Install the plug (Fig. 92).
5. Add hydraulic oil into the hydraulic oil filler neck Item 1
(Fig. 90) until the oil level has reached the »Maximum«
mark.
6. Close the hydraulic fluid filler neck cap.
7. Vent the hydraulic system (see the section »Venting the
hydraulic system«).
8. Check the hydraulic fluid level and add hydraulic fluid
if necessary.
9. Dispose of the old hydraulic fluid in an ecologically sound
manner.
194
SERVICING AND INSPECTION
Changing the return filter element
The hydraulic system is equipped with a return filter Item 2
(Fig. 93). It is connected to an indicator light. An installed
bypass valve secures the return valve against positive pressure.
Replace the filter element of the return filter Item b.
(Fig. 94) during inspections or if the indicator light
for the return filter Item 3 (Fig. 13, page 48) on the
instrument panel is illuminated between inspection
intervals.
After installing a new filter element, the indicator
light on the instrument panel should no longer be
illuminated.
Replace the filter element in a timely manner, as
the filter‘s effect is overridden when the bypass
valve is open.
ENVIRONMENTAL NOTE
Let the pressure from the hydraulic fluid reservoir
escape by opening the hydraulic fluid filler neck
cap Item 1 (Fig. 90) before you unscrew the cover
of the filter housing Item a (Fig. 94). Otherwise,
hydraulic fluid will be forced out of the filter housing
and could get into the environment.
Dispose of the old filter element and any leaking
hydraulic fluid in an ecologically sound manner.
SERVICING AND INSPECTION
WL50
1. Stop the loader on a horizontal surface and set the parking brake.
2. Lower the loader lift arms and attachment to the ground
or work surface.
3. Stop the engine.
4. Relieve the residual hydraulic pressure using the procedure described in Section 8, page 134.
5. Remove the cover of the filter housing Item a (Fig.
94).
6. Remove the filter element item b (Fig. 94).
7. Insert a new filter element.
8. Check the gasket Item c (Fig. 94): Replace the gasket
if it is damaged.
9. Screw on the cover of the filter housing Item a (Fig.
94):
10.Close the hydraulic oil filler neck Item 1 (Fig. 90).
11.Vent the hydraulic system (see the section 10.7.6, page
196 »Venting the hydraulic system«).
12.Check the hydraulic fluid level and add hydraulic fluid
if necessary.
Fig. 93
Return filter
2
Fig. 94
Filter insert
b
a
c
195
196
SERVICING AND INSPECTION
Venting the hydraulic system
WARNING
Possibility of injury or equipment damage.
Trapped air in the hydraulic system will cause erratic
or inadvertent movement of the loader arms.
►► Before returning the loader to work after servicing, it is necessary to purge any air trapped in
the hydraulic system.
1. Check the fluid level in the hydraulic fluid reservoir. If
necessary, add hydraulic fluid until the fluid level is at
the »Maximum« mark.
2. Start the engine and let it idle for a few minutes.
3. To purge air from the cylinders, slowly actuate each
cylinder several times through its complete stroke.
4. With the engine running, turn the steering wheel to
its maximum angle of turn in both directions until the
steering can be actuated faultlessly and without any
noises.
5. Check the oil level in the hydraulic fluid reservoir after exhausting has been completed. If necessary, add
hydraulic fluid until the fluid level is at the »Maximum«
mark.
SERVICING AND INSPECTION
WL50
10.7.7 Servicing the axles
Service the transmission and the axles according
to the inspection intervals specified in this Operator’s Manual.
Checking / filling and draining screws can be found
in the same place on the front and rear axles.
The axial piston oil motor of the loader‘s drive hydraulics is
mounted on the transfer case. The transfer case is connected to the rear axle of the loader. The front axle is powered
via the drive shaft. The wheels are driven via two reduction
gears on each axle.
Checking the axle oil level
The complete axle (transfer case, differential, axle
tube, wheel drives) shares a common oil supply.
You can check the oil level on the differential housing, the transfer case and on the wheel reduction
gears.
Fig. 95
Differential
a
b
197
198
SERVICING AND INSPECTION
Fig. 96
Transfer case
c
d
Fig. 97
Wheel reduction
e
1. Stop the loader on a horizontal surface and set the parking brake.
2. Lower the loader lift arms and attachment to the ground
or work surface.
3. Stop the engine.
4. Remove the hex socket screws items a, c, e (Fig.
95/96/97). For the wheel reduction gears raise the wheel
with a jack first and turn it so that the hex socket screw
Item e (Fig. 97) is horizontal.
5. The transmission oil must be at or below the bottom
edge of the filler neck.
6. If necessary, add transmission oil.
7. Replace the hex socket screws items a, c, e (Fig.
95/96/97).
SERVICING AND INSPECTION
WL50
Changing the axle oil
WARNING
Burn hazard.
The transmission oil operating temperature can
cause serious burns if contact is made with skin.
►► If hot oil contacts the skin, seek medical attention immediately for burn treatment.
The complete axle (transfer case, differential, axle
tube, wheel drives) shares a common oil supply. If
some of the oil must be changed, then afterwards,
all oil levels must be checked to ensure that sufficient oil is in the axle.
Refer to section 10.6, page 163 to determine the
correct size container to avoid spillage of the
drained lubricant.
The transmission oil is viscous. Change the axle
oil while the oil is warm and open the filler plugs,
so that the oil runs out more quickly.
ENVIRONMENTAL NOTE
Avoid environmental damage.
Do not allow oil and waste containing oil to enter
the ground or bodies of water.
Collect leaking transmission oil and dispose of it
in an ecologically sound manner.
199
200
SERVICING AND INSPECTION
1. Stop the loader on a horizontal surface and set the parking brake.
2. Lower the loader lift arms and attachment to the ground
or work surface.
3. Stop the engine.
4. Place a sufficiently large receptacle under the drain
opening of the differential housing item b (Fig. 95).
5. Remove the hex socket plug Item a (Fig. 95); the transmission oil will now drain more quickly.
6. Remove the hex socket plug Item b (Fig. 95).
7. The transmission oil drains off.
8. Lift the wheels with a jack and turn them so that the
sealing plugs Item e (Fig. 97) are down.
9. Place a receptacle under the sealing plugs Item e (Fig.
97) and remove them.
Once the transmission oil has been drained:
1. First fill the wheel reduction transmission, after you have
aligned the wheels as illustrated in (Fig. 97).
2. The transmission oil must be at or below the bottom
edge of the opening.
3. Insert the sealing plug Item e.
4. Install the hex socket screw on the differential housing
Item b (Fig. 95) back in.
5. Pour new transmission oil through the filler neck into the
axle Item a (Fig. 95).
6. The transmission oil must be at or below the bottom
edge of the filler neck.
7. Install the hex socket plug Item b (Fig. 95) on the differential housing back in.
8. Check the axle oil level once again after half an hour of
operation on the transfer case housing, the differential
housing, and the wheel reduction gears, and add transmission oil if necessary.
WL50
SERVICING AND INSPECTION
10.7.8 Servicing the brakes
The hydrostatic drive is used as an operating brake and
operates equally without wear resistance on all four wheels.
In addition, the loader has a foot brake and parking brake.
The foot brake and parking brake consists of a hub brake on
the differential. The parking brake is actuated via a bowden
cable, by means of the handbrake lever. The foot brake
is activated hydraulically via brake lines and main brake
cylinders by means of the braking-inching pedal.
WARNING
Personal injury hazard.
The service and parking brakes are essential for
safe operation of the wheel loader. Loss of control
is hazardous to the operator as well as other people
on the work site or public roads.
►► Always check brake performance at the start
of each work shift and stay alert to changes
in response or capacity. A loss in response or
capacity must be corrected.
►► Stop the wheel loader in a safe place and lower the loader lift arms and attachment to the
ground.
►► Stop the engine and notify the supervisor or a
technician to diagnose the brake system and
make any needed repairs before resuming
work.
201
202
SERVICING AND INSPECTION
Checking the brake fluid level / adding brake fluid
WARNING
Health hazard.
Brake fluid can be absorbed into the skin or cause
infections.
►► Avoid contact with skin and eyes.
►► Wear protective gloves and eye protection.
Using the wrong brake fluid damages the brake
system.
Only use brake fluid approved by Wacker Neuson
for the braking system (see section 10.6, page 163
»Specifications and fill quantities«).
If you are frequently adding brake fluid between
inspections, then there is a system leak. Do not
work with the loader again until the faults have
been eliminated.
ENVIRONMENTAL NOTE
Avoid environmental damage.
Do not allow oil and waste containing oil to spill on
the ground or get into bodies of water.
Collect leaking transmission oil and dispose of it
in an ecologically sound manner.
WL50
The brake fluid reservoir is on the left at the back, underneath the engine enclosure (Fig. 98). The control marks
»MAX« and »MIN« are on the side of the container.
If the brake oil level in the brake fluid container falls below
the »MIN« mark, fill with prescribed brake fluid up to the
»MAX« mark and have the brake system checked by a
trained specialist.
SERVICING AND INSPECTION
Fig. 98
Brake fluid container
203
204
SERVICING AND INSPECTION
10.7.9 Servicing the tires and wheels
WARNING
Injury or explosion hazards.
►► Do not attempt to remove or install tires on the
rims. Special tools and training are required
to dismount and mount tires safely. Contact a
qualified technician for tire repair service.
►► Do not weld or attempt to use any type of flame
to heat the rim with the tire mounted on the rim.
Tires can release gas with age creating an explosive atmosphere internally. Heat or flames
can cause an explosion.
NOTICE
Different wheel or tire sizes can result in damage
to the loader‘s differentials.
Install only wheels or tires from the same manufacturer which are the same size and have the same
wear.
Inflating the tires
WARNING
Explosion hazard.
Overinflating tires can cause them to explode.
►► Use only filling devices with a calibrated pressure gauge to pump up tires.
►► Make sure that no one is in the danger area
when you pump up tires.
These instructions refer to inflating in the event
of loss of air pressure. Observe the air pressure
specified for the loader‘s tire size (see air pressure
table for tires).
In the case of complete air pressure loss, this work
may only be performed by trained, experienced specialized personnel with appropriate equipment.
SERVICING AND INSPECTION
WL50
Air pressure table for tires
1. Stop the loader on a horizontal surface and set the parking brake.
2. Lower the loader lift arms and attachment to the ground
or work surface.
3. Stop the engine.
4. Remove the valve stem cap on the tire valve.
5. Place the pneumatic chuck of the filling device on the
tire valve so that it stays in place.
6. Inflate the tires to the specified pressure.
7. Remove the pneumatic chuck of the filling device from
the tire valve.
8. Replace the valve stem cap back on the tire valve.
Tires
PR
Air pressure
7.00-12 AS
6
3,2 bar
47 psi
27x8.50-15 EM
8
4,2 bar
62 psi
27x10.50-15 EM
8
4,2 bar
62 psi
31x15.50-15 AS
8
3,1 bar
45 psi
10.0/75-15,3 AS
8
3,1 bar
45 psi
10
4,5 bar
66 psi
8
3 bar
44 psi
10.5/80-18 AS
10
3,7 bar
54 psi
12.5/80-18 AS
12
4,7 bar
69 psi
10x16.5 EM
8
3,6 bar
53 psi
12x16,5 EM
10
4,5 bar
66 psi
15.5/55-18 EM
14
4,0 bar
60 psi
4,0 bar
60 psi
3,5 bar
50 psi
3,5 bar
50 psi
11.5/80-15,3 AS
405/70 R18 EM
15.0/55-17 AS
405/70 R20 AS
10
205
206
SERVICING AND INSPECTION
Changing wheels
WARNING
Injury hazard.
An improperly secured machine can move or fall
unexpectedly while changing wheels.
To remove a wheel for service:
►► stop the loader on a flat surface
►► lower the loader lift arms and attachment to the
ground or work surface
►► engage the parking brake
►► chock a wheel
►► Determine the mass of the wheel loader and
use a lifting device rated for the mass.
Observe the direction of the tread of the tires so
that the greatest force of the loader is achieved
during forward travel.
Always tighten the wheel bolts with a torque wrench
to the specified tightening torque.
Always alternately tighten the wheel bolts opposite
each other.
After changing tires, check the tightening torque of
the wheel bolts every two hours until they do not
change anymore.
You will find the tightening torque in the table below:
Wheel bolts M18 x1,5
Front wheels
Rear wheels
285 Nm
285 Nm
(210 ft.lbs.)
(210 ft.lbs.)
WL50
1. Stop the loader on a horizontal surface with a hard foundation and set the parking brake.
2. Lower the Loader lift arms and attachment to the ground
or work surface.
3. Stop the engine.
4. Position the jack under the axle next to the wheel to
be changed. Make sure that the loader cannot slip off
the jack.
5. Loosen the wheel bolts.
6. Raise the jack just high enough so that the wheel does
not touch the ground.
7. Remove the wheel bolts and the wheel.
8. Install the new wheel and the wheel bolts.
9. Tighten the wheel bolts.
10.Lower the jack.
11.Alternately tighten the wheel bolts opposite each other
to the specified tightening torque.
SERVICING AND INSPECTION
207
208
SERVICING AND INSPECTION
10.7.10Servicing the cab vent filter
Change the cab air filter annually, or more frequently under dusty conditions.
The loader is equipped with a dry air filter for filtering the
engine intake air for cab ventilation. The filter is located
on the front of the cab above the middle joint of the loader
(Fig. 99).
1.
2.
3.
4.
Remove the lid of the filter housing.
Remove the filter.
Insert a new filter.
Replace the lid of the filter housing.
Fig. 99
Cab vent filter
SERVICING AND INSPECTION
WL50
10.7.11Servicing the air conditioning system
(Optional equipment)
WARNING
Burn hazard.
Coolant can contain alkali which may cause chemical burns.
Poison hazard.
Coolant can be harmful or fatal if swallowed.
►► Avoid any contact with fluid coolant.
►► Rinse skin and eyes immediately with clean
water if they have been exposed to coolant.
Service and repair work require particular specialised skills and may only be performed in an authorized Wacker Neuson service center.
Do not do any welding work on components of the
coolant circuit or in their immediate vicinity.
209
210
SERVICING AND INSPECTION
10.7.12Servicing the electrical system
WARNING
Electric shock hazard.
►► Always disconnect the battery before working
on the electrical system if tools, spare parts, etc.
with electrical components or contacts could
touch it.
Electric shock and burn hazards.
►► Do not clean sensitive electrical components
(instrument panel, alternator, compact plug,
multi-function lever, etc.) with a high-pressure
cleaner.
►► Do not touch incandescent lamps and headlight
reflectors with your fingers if the bulbs have
been illuminated.
Have malfunctions in the electrical system corrected by trained specialized personnel.
Fuse allocation
The electrical circuits of the wheel loader are fused to prevent damage from short circuits and malfunctions. The fuses
are located in box 1 and 2 near the starting key receptacle
on the right side of the steering column. The second location is on the right hand side of the cab next to operator‘s
seat (Fig. 101).
NOTICE:
If an electrical device fails to respond to a control
movement, stop the wheel loader as if stopping at
the end of a work shift and check the fuse for that
circuit. If the fuse has failed, determine the cause
of failure and repair the cause.
Insert a new fuse of the specified rating and return
to work.
Do not continue work with a failed fuse.
Do not install a fuse with a higher rated capacity
than the failed fuse. This can result in serious damage to the electrical circuit.
SERVICING AND INSPECTION
WL50
There are two 40 ampere fuses in the battery box
(Fig. 100). One is the main fuse for the cab, while
the other is the main fuse for the lights and controls.
For loaders with Deutz engine, there are also two
50 ampere fuses that protect the preheating system.
If one of these fuses is burnt through, there is major
damage to the electrical system. Contact your local
Wacker Neuson service center..
Fig. 101
Fuse boxes
Box 1
Box 2
Fig. 100
Master fuses
Box 3
211
212
SERVICING AND INSPECTION
Fig. 102 Fuse allocation
Box 1
Box 2
Box 3
1
9
17
2
10
18
3
11
19
4
12
20
5
13
21
6
14
22
7
15
23
8
16
24
Item Fused function for Box 1
Rating (A)
1
Available
7,5
2
Turn signal
7,5
3
Warning flasher
7,5
4
Brake light
15
5
Side lamp left
10
6
Side lamp right
7,5
7
Low beam light
7,5
8
Main beam
7,5
SERVICING AND INSPECTION
WL50
Item Fused function for Box 2
Rating (A)
Item Fused function for Box 3
Rating (A)
9
Engine
10
17
Pressure relief, Loader lift arms locking system
15
10
Cab
7,5
18
Control unit, electrical connection
15
11
Instruments, indicator lights
7,5
19
Front headlights
15
12
Front windshield wiper, Forward warning device
15
20
Rear work lights, back-up lights, switch lights
15
13
Heater fan
15
21
Rear window heating
15
14
Stability indicator
3
22
15
15
Available
10
Forward warning device, air filter contamination
switch
16
Available
7,5
23
Rotating beacon, radio
15
24
Cab inside light, radio
10
213
214
SERVICING AND INSPECTION
Battery
WARNING
Explosion and burn hazard.
Batteries produce and vent gases that can be explosive if concentrated in an unventilated space.
►► Do not smoke or use open flames near a storage battery.
►► Do not place objects on the battery. If a metallic object such as a wrench contacts both the
positive and negative post on the battery, it will
cause a direct short and a possible explosion.
Severe burns can result .
►► Cover the battery with protective insulation, or
remove the battery entirely, if service work is
to be conducted near the battery.
WARNING
Battery fluid is poisonous and corrosive.
►► Prevent battery fluid from coming into contact
with your skin, eyes, mouth, or clothing.
►► Wear protective gloves and safety goggles.
►► If battery fluid contacts skin, immediately rinse
the contaminated area with plenty of clean water
and seek medical treatment.
ENVIRONMENTAL NOTE
Avoid environmental damage.
Dispose of old batteries in an ecologically sound
way, separate from other waste.
The battery has a nominal voltage of 12 volts; the battery
capacity is 77 Ah. The battery is located on the left side of
the loader in the engine compartment Item 1 (Fig. 103). To
access it, open the engine enclosure.
SERVICING AND INSPECTION
WL50
215
Servicing the battery
(-)
1
(+)
3
Fig. 103
Location of the
battery
• Maintain a clean battery cable connection at both the
positive and negative posts. Seal the joints with special
sealant for electrical connections. Dirt and moisture can
cause a trickle loss of electricity when the wheel loader
is not in operation.
• Check the acid level of the battery on a weekly basis.
• Add distilled water to the battery manufacturer’s specified level if the level is low.
• A cover is provided to insulate the positive pole from
inadvertent contact with the frame of the loader or from
a dropped metallic object. Always confirm that the cover is in place and serviceable. Replace if damaged or
cracked.
216
SERVICING AND INSPECTION
Checking the battery acid level
WARNING
Personal injury hazards.
Do not open the engine enclosure or attempt to tilt
the operator cab/platform if the engine is running.
Follow the instructions in Section 10.7.1, pages
164-168, for opening the hood and tilting the cab.
Check the acid level of the battery on a weekly
basis.
Refill the battery with distilled water only.
1. Stop the loader on a horizontal surface and set the parking brake.
2. Lower the loader lift arms and attachment to the ground
or work surface.
3. Stop the engine.
4. Open the engine enclosure (Ref. section 10.7.1, page
164).
5. The acid level is visible through the battery housing.
MIN/MAX marks have been affixed on the outside of the
battery housing. The acid level must always be between
these marks.
6. If the battery solution is below the MIN mark add distilled
water until the level is at the MAX mark.
Adding distilled water
1. Clean the top of the battery to prevent dirt spillage into
the open cells of the battery.
2. Open the filling cover for each battery cell (there are 6
for this 12 volt battery).
3. Add distilled water through the openings up to the MAX
mark in each of the six battery cells.
4. Replace each battery cell cover.
SERVICING AND INSPECTION
WL50
217
Disconnecting and connecting the battery / changing the battery
WARNING
Personal injury hazards.
Do not open the engine enclosure or attempt to tilt
the operator cab/platform if the engine is running.
Follow the instructions in Section 10.7.1, pages
164-168, for opening the engine enclosure and
tilting the cab.
Always follow the correct sequence when disconnecting the battery.
– Disconnecting:
First the negative pole and then the positive pole.
– Connecting:
First the positive pole and then the negative pole.
Removing the battery:
1. Stop the loader on a horizontal surface and set the parking brake.
2. Lower the loader lift arms and attachment to the ground
or work surface.
3. Stop the engine.
4. Before disconnecting the battery, switch off all electrical
controls (and the battery disconnect switch) and remove
the starting key.
5. Open the engine enclosure (Ref. section 10.7.1, page
164).
6. Loosen the negative battery cable clamp and remove the
clamp from the post. Position the cable so it is not touching the machine. Wrap an insulating material around the
conducting part of the cable clamp to eliminate the risk
of electrical shock (Fig. 103).
7. Remove the protective cover to gain access to the cable
clamp bolt. Loosen the positive battery cable clamp and
remove the clamp from the post. Position the cable so
it is not touching the machine. Wrap an insulating material around the conducting part of the cable clamp to
eliminate the risk of electrical shock (Fig. 103).
8. Remove the battery support retaining bolts.
9. Remove the battery with the lifting aid incorporated in
the battery identified as item 3, Fig 103. If the battery
does not have an integral lifting aid, use a special strap
that fits over each pole and provides a means to remove
the battery.
Install the battery following the steps in the reverse order.
218
SERVICING AND INSPECTION
10.8 Jump-starting / emergency starting
WARNING
Explosion and burn hazard.
Batteries produce and vent gases that can be explosive if concentrated in an unventilated space.
►► Do not smoke or use open flames near a storage battery.
►► Do not place objects on the battery. If a metallic object such as a wrench contacts both the positive and negative post on the battery, it will cause a direct short and a possible explosion. Severe burns can result .
►► Cover the battery with protective insulation, or remove the battery entirely, if service work is to be conducted
near the battery.
►► If a second machine or vehicle is used as the jump start battery source, ensure that the vehicles/machines
do not touch.
►► Do not attempt to jump start a frozen or defective battery. A short circuit or rapid increase in heat within the
battery can cause an explosion.
►► Do not connect two batteries in series (negative post to positive post) because the voltage output will be 24
volts and damage the electrical system of the wheel loader.
►► Use only jump-starting batteries with the same voltage.
►► Use serviceable jumper cables with a heavy duty 12 volt rating.
►► Lay out the jumper cables so that they cannot be struck by rotating engine parts.
SERVICING AND INSPECTION
WL50
Before jump-starting, check if the loader‘s dead battery is
functional:
1. Switch off all the loader‘s electrical controls.
2. Switch the starting key to position 1 (operation). The
warning lights must light up now!
3. If the warning lights do not light up, the battery is defective. In that case, the loader must not be started! Install
a new replacement battery.
r
2
V
1
L
3
s
4
Fig. 104
Connecting the
jumper cables
219
220
SERVICING AND INSPECTION
Getting ready
Starting the engines
1. Switch off all the loader‘s electrical controls.
2. Switch the starting key to position 0.
3. Drive the vehicle with the good battery (charged battery)
near but not touching the loader.
4. Switch off all electrical controls on the vehicle with the
good battery and stop the engine.
1. Start the engine of the vehicle with the good battery and
let it run at an increased speed.
2. Attempt to start the loader engine.
3. If the engine does not start after 15 seconds, wait one
minute before trying again.
4. Once the engine has started, let both engines continue
to idle with the jumper cables connected for about another two minutes.
Connect the jumper cables
(The correct sequence must be adhered to)
1. Connect the red jumper cable Item r (Fig. 104) to the
positive pole of the dead battery Item L.
2. Connect the red jumper cable to the positive pole of the
charged battery Item V (Fig. 104).
3. Connect the black jumper cable Item s to the negative
pole of the charged battery.
4. Connect the black jumper cable to the negative pole of
the dead battery.
Detach the jumper cables
(As with connecting, follow the correct sequence):
1. Disconnect the black jumper cable first from the negative pole of the dead battery and then from the negative
pole of the charged battery.
2. Disconnect the red jumper cable first from the positive
pole of the charged battery and then from the positive
pole of the dead battery.
SERVICING AND INSPECTION
WL50
221
10.9 Loader storage
The specified measures refer to shutting down and re-starting the loader over longer periods of time.
Follow the Operator’s Manual for the engine.
Note:
Before beginning the shutdown procedures, drive the
Wheel Loader to its storage location.
Shutting down the loader
1. Park the loader as described in section 9, page 137
»Securing the loader«.
2. Engage the articulated frame lock (Ref. Section 6.2,
page 126).
3. Raise the loader so that the tires no longer touch the
ground.
4. Release the parking brake.
5. Lower the loader lift arms and attachment to the
ground.
6. Relieve residual hydraulic pressure, ref. Section 8, page
134 »Relieving residual pressure in the hydraulic system«. Move all hydraulic controls to the neutral position.
7. Spray bare metal parts of the loader (e.g.: the piston
rods of the hydraulic cylinders if they are not retracted)
with an anti-corrosion agent.
8. Preserve the engine.
222
SERVICING AND INSPECTION
Preserving the engine
Storing the battery:
1. Clean the engine in a suitable place using a high-pressure cleaner.
2. Bring the engine to operating temperature.
3. Drain the engine oil and dispose of it in an ecologically
sound manner.
4. Pour anti-corrosion oil into the engine.
5. Drain the fuel from the reservoir.
6. Produce a mixture of 90% fuel and 10% anti-corrosion
oil and pour it into the fuel reservoir.
7. Let the engine idle for 10 minutes before turning it off.
8. To preserve the cylinders and combustion chamber,
crank the engine by hand several times.
9. Remove the fan belt and pack it for storage so that it is
airtight and light-proof.
10.Spray the belt pulley contact surface with anti-corrosion
agent.
11.Close the intake and exhaust opening of the engine.
1.
2.
3.
4.
Remove the battery.
Clean the battery.
Charge the battery.
Store the battery in a dry, well-ventilated room at approx. 20°C (68°F).
5. Check the acid level once a month.
6. Recharge the battery before installing it again.
WL50
SERVICING AND INSPECTION
Restarting the loader
Remove preservatives from the engine
1.
2.
3.
4.
1. Remove the closures from the intake and exhaust opening of the engine.
2. Remove the anti-corrosion agent from the pulley.
3. Install the fan belt.
4. Drain the preservative oil and pour in engine oil.
5. Start up the engine.
6. Check the V-belt tension after the first two operating
hours.
Remove the engine preservative.
Install the battery.
Check the air pressure of the tires.
Remove the preservative for the hydraulic cylinders‘
piston rods.
5. Lower the loader.
6. Check the functioning of the electrical system.
7. Unblock the articulated joint.
8. Vent the hydraulic system.
9. Check the functioning of the steering and the brakes.
223
224
T roubleshooting and emergency maintenance
11
Troubleshooting and emergency maintenance
Fault / malfunction
Possible cause
Remedy
Engine does not start
Handbrake not set, drive direction switched
Set the handbrake, shift to neutral
Fuel reservoir empty
Fill up the reservoir and vent the fuel system if
necessary
Fuel filter clogged, paraffin separation in winter
Change the fuel filter, use winter diesel
Release solenoid on the engine does not attract
Check the fuses
Fuel line is leaky
Retighten all the threaded connections and
clamps
Starting speed too low
Check and charge the battery, check that battery terminals fit tightly
Set the handbrake
Release the handbrake
Handbrake switch is defective
Replace the handbrake switch
Inch cartridge is not in neutral position
Check and, if necessary, repair the inch cartridge and brake shoe return spring
The solenoids on the transmission pump are
not getting any power
Check the fuses, and have the multi-function
lever and the electronics checked at the garage
Engine is running but loader
will not drive
T roubleshooting and emergency maintenance
WL50
Fault / malfunction
Possible cause
Remedy
The engine is getting too hot
The engine radiator / oil cooler air flow is restricted by debris
Clean it
Coolant level is too low
Fill it up
The thermostat is jammed
Have the thermostat replaced at the garage
V-belt loosened from the fan blade
Tighten the V-belt
Oil level is too low or too high
Adjust the oil level
Hydraulic oil cooler is dirty
Clean it
V-belt loosened from the fan blade
Tighten the V-belt
Hydraulic fluid level is too low
Top up the hydraulic fluid
Load too high
Reduce the machine load, take breaks
Air filter is dirty
Replace it
Wrong fuel grade
Change the fuel
Inching is stuck
Check, repair
Engine speed is too low
Adjust it
The hydraulic system is getting too hot
Machine performance is too
low
225
T roubleshooting and emergency maintenance
226
»S«
Transmission pump
Suction hose
Rotary direction
Filter
Reservoir Oil
Wear
Cooler
System
Oil motor
Auxiliary pump
Scavenging valve
Scavenging needle
»G«
Transmission pump
Oil grade
Temperature
Troubleshooting for transmission pump / oil engine
Suction
pressure
Measuring point
Cause
Supply pressure
Measuring point
Accessories
Brake / accumulator
Cooler
Cooler
not blocked
Clutch
Brake
Waste oil-leakage
Oil temperature
Connecting wire
Supply pressure valve
Wear
Oil temperature
Oil motor
Oil motor
Choke
Pressure cut-off
Control unit / Solenoid
DA Pressure cut-off for control valve/inching/
rotary choke
Bypass valve
Oil temperature
Speed
Connection (coupling) Drive engine pump
X1/X2 Transmission pump
Suction pressure
Cause
Control pressure
Suction pressure
Supply pressure
Measuring point
Cause
Cooler
High-pressure valves
Cut-off
Transposition
Wear
Oil temperature
High pressure MA/MB Transmission pump
Supply pressure
Control pressure
Measuring point
Cause
Diesel engine
Speed max./min.
Diesel filter
Air filter
General performance
Cause
Driving speed is not
reached
Cause
Diesel engine
Speed
Control pressure
Inching
Transmission pump
Diesel engine
Speed
Loader
Loader
Gear ratio
Tires
Tire diameter
Diesel engine
Fuel-injection pump
Fuel filter
Transposition
Control pressure
Pressure cut-off
Not enough driving power Transmission pump
Cause
High-pressure valves
Wear
Transposition
Transmission pump
Engine is pressed hard
Cause
Transmission pump
Choke
Suction pressure
Control pressure
Commencement of control
Inching
Drive direction switch
Commencement of control
Mechanical zero position
Transmission pump
Vehicle starts driving
too late
Cause
Diesel engine spins Vehicle does not stand still
Troubleshooting for the loader
Oil motor
Oil motor
Oil motor
Commencement of control
Solenoid
Pivoting angle
Commencement of control
Connecting wire X1/X2
Solenoid
Pivoting angle
Commencement of control
Pivoting angle
WL50
T roubleshooting and emergency maintenance
227
228
S afety instructions for repairs
12
Safety instructions for repairs
The »Safety instructions for repairs« section does
not consist of instructions for repairs, but rather of
safety instructions which, in addition to the generally valid safety regulations for repair work, refer to
hazards that could occur during repair work, and
of notes which should prevent the machine from
being damaged during repairs.
Specific repair instructions are not included in this
Operator’s Manual.
Observe in particular:
12.1 General safety regulations for repairs
• The basic safety instructions.
• The basic safety instructions for servicing and inspection.
• All warning signs and instructions attached to the loader.
• That the descriptions of work processes provide the
necessary instructions only for experienced specialized
personnel.
• That the Operator’s Manual is always kept with the
loader
Operator’s Manual:
Repair personnel:
• Perform repairs only if you have read and understood
the Operator’s Manual.
• Repair personnel must have specialized knowledge and
experience in repairing this or comparable loaders.
• Should knowledge be lacking, training by experienced
repair, e.g. Wacker Neuson Service, should be performed.
WL50
Articulated frame lock
• Always install the articulating joint lock when performing
repair work in the articulation crush zone.
• Remove the articulated joint lock and store it properly
(Ref. Section 6.2, page 126) after completing the repair
work.
Accumulators:
• Do not attempt to repair accumulators. These are pressurized devices requiring special technical skill and tools
to repair. Replace the entire assembly.
S afety instructions for repairs
229
Removing components:
WARNING
Burn hazard.
Engine components and fluids can get very hot
during operation.
►► Do not remove components when the loader
is warm from operation.
• Relieve hydraulic pressure in hydraulic lines and hose
assemblies, cylinders, coolers, the hydraulic reservoir,
pressure reservoirs and other systems or accumulators
before beginning work.
• Replace defective components before using the wheel
loader.
• Clean components carefully before removing them.
• Mark the parts removed in the correct order so that you
do not make mistakes when installing them.
• When removing a component, plug the cleared connections, open holes and housing carefully so that no
dirt can infiltrate.
230
S afety instructions for repairs
Do not remove seals or sealing wax:
After completing the repair:
• Changing rated pressures for relief valves is prohibited
without the express consent of Wacker Neuson.
• Do not damage or remove seals and sealing wax on
the engine, the pressure limiting valves and accumulators.
• If an area is repainted and a safety label is damaged or
obliterated, replace the label before using the machine.
If a removed component or assembly had a safety message label, replace the label with the replacement part.
Your Wacker Neuson dealer can help you to get replacement labels for your machine
• Put protective paint on all uncoated machine parts to
prevent corrosion damage.
• Install the cab mounting screws again after the repair
work has been completed.
• Reattach all safety devices, covers and noise/vibration
insulation after repair work has been completed.
• Check the functioning of the loader, in particular the
parts repaired in trial operation. Make sure that no one
is in the loader‘s danger area.
• Do not approve the loader for operation until all the
loader‘s areas function properly.
WL50
12.2 Engine
• Perform repair work only if the loader is secured as described in Section 9, page 137 »Securing the loader«.
S afety instructions for repairs
231
12.3 Welding work
WARNING
Improper handling of the ROPS/FOPS can compromise its integrity.
►► Do not drill, weld, straighten, or bend the ROPS
/ FOPS protective structures.
►► Allow only trained authorized personnel to install
new ROPS / FOPS structures.
• Only a certified trained welder shall perform welding
work.
• Only certain authorized individuals under the supervision of a competent person may weld containers which
contain or have contained substances that are combustible, promote combustion, are explosive, or can,
during welding, produce vapor, gas, mist or dust that
are hazardous to health. Should you have problems or
questions, it is imperative that you consult the Wacker
Neuson Service.
232
S afety instructions for repairs
Before performing welding work on the loader
After welding has been completed:
• Disconnect the battery as described in this Operator’s
Manual.
• Disconnect the positive pole (terminal B+) on the generator.
• Switch OFF the battery disconnect switch (if present).
• Protect bare terminals and connections against shortcircuiting.
• Attach the welding grounding terminal in the immediate vicinity of the welding site. Do not allow the welding
current to pass through gears, bolts, articulated joints
or hydraulic cylinders.
• Reconnect all the electrical connections and check that
they function.
• Connect the battery as described in this Operator’s
Manual.
S afety instructions for repairs
WL50
233
12.4 Hydraulic system
12.5 Brakes
• Before performing repair work, relieve the pressure in
the hydraulic system as described in Section 8, page 134
»Relieving residual pressure in the hydraulic system«.
• Replace damaged and leaky hydraulic lines and hoses
with new ones. Do not use used hoses.
• Replace hydraulic hoses after six years of use.
• Dispose of any leaking oil and waste containing oil in
an ecologically sound manner.
• Observe the »Basic safety instructions for servicing and
inspection«, page 138.
• Repair work on brakes may only be performed by qualified technicians.
• Using a brake fluid other than the one specified by the
manufacturer is prohibited.
• Observe the notes on health hazards and environmental
protection when working with brake fluid.
• Perform repair work on the brakes only if the loader is
secured as described in Section 9. page 137 »Securing
the loader«.
234
F i n a l s h u t d o w n o f t h e l oa d e r / d e c o m m i s s i o n i n g
13
FINAL SHUTDOWN OF THE LOADER / DECOMMISSIONING
ENVIRONMENTAL NOTE
Avoid environmental damage. Do not allow oil and
waste containing oil to spill on the ground or get
into bodies of water!
Dispose of different materials and operating fluids/
auxiliary materials separately and in an ecologically
sound manner.
Should you no longer plan to use the loader as intended,
make sure that it is shut down, i.e. decommissioned, and
disposed of according to the valid regulations.
Before disposing of the loader:
• Observe all safety procedures regarding shutdown of
the loader.
• Make sure that the loader cannot be operated from the
time of shutdown to further disposal.
• Make sure that no environmentally hazardous operating
fluids or fuel escape and that the machine poses no other
dangers in the place where it is standing.
• Protect the loader against unauthorized use. Close all
openings (doors, windows, engine enclosure) and secure
the loader as described in Section 9, page 137 »Securing the loader«.
• Attach all the safety devices.
• Eliminate leaks on the engine, reservoirs and hydraulic
system.
• Remove the battery.
• Store the loader in a place protected against access by
unauthorized persons.
WL50
Disposing of the loader:
• Subsequent recycling of the loader must take place in
accordance with the current state of the art at the time
of recycling, taking into account the accident prevention
regulations.
• Dispose of all parts at the sites provided for them, depending on the material.
• Take care to separate the materials when recycling.
• Make sure that operating and auxiliary aids are disposed
of in an ecologically sound manner.
F inal shutdown of the loader / decommissioning
235
236
A ppendi x
14
Appendix
14.1 Ordering replacement parts
Use only »original Wacker Neuson replacement
parts« for your loader.
This is especially necessary in the case of hydraulic
hoses. Use only original hydraulic hoses or hydraulic hoses of comparable quality.
Always provide the following data for ordering replacement parts. This is the only way we can assure
smooth processing of your order and delivery of
the replacement parts.
• Wacker Neuson- machine type
• Specify the serial number of the machine (see rating
plate) For the engine, specify the respective engine
number
• Item number and designation of the replacement part
• Address with telephone number (in the event of questions)
• Customer number (if available)
• Name of the orderer
We reserve the right to change the replacement parts list.
A ppendi x
WL50
Enter the most important data for your loader on
this page. In this way, you can quickly access the
vehicle ID no. and other important data when ordering replacement parts.
Loader type:
Vehicle ID no.:
Engine type:
Engine no.:
Delivery date:
Importer (name; address):
Service garage (name; address):
237
238
A ppendi x
14.2 Inspection verification
Enter the inspections as they are performed.
2nd Inspection
Performed on:
Operating hours:
1st Inspection
Performed on:
Stamp / signature of the garage
Operating hours:
3rd Inspection
Performed on:
Stamp / signature of the garage
Operating hours:
Stamp / signature of the garage
A ppendi x
WL50
4th Inspection
6th Inspection
Performed on:
Performed on:
Operating hours:
Operating hours:
Stamp / signature of the garage
Stamp / signature of the garage
5th Inspection
7th Inspection
Performed on:
Performed on:
Operating hours:
Operating hours:
Stamp / signature of the garage
Stamp / signature of the garage
239
240
A ppendi x
8th Inspection
10th Inspection
Performed on:
Performed on:
Operating hours:
Operating hours:
Stamp / signature of the garage
Stamp / signature of the garage
9th Inspection
11th Inspection
Performed on:
Performed on:
Operating hours:
Operating hours:
Stamp / signature of the garage
Stamp / signature of the garage
WL50
For personal notes
A ppendi x
241
242
I nde x
Index
Activating the optional hydraulics.......................................................................................................................... 95
Activating the optional hydraulics using the button............................................................................................... 98
Activating the optional hydraulics using the control lever...................................................................................... 95
Adding engine oil..................................................................................................................................................171
Adding hydraulic fluid.......................................................................................................................................... 192
Adjusting the operator’s seat................................................................................................................................. 65
Adjusting the steering column............................................................................................................................... 68
Air conditioning system......................................................................................................................................... 79
Air filter dust valve............................................................................................................................................... 180
Air pressure table for tires................................................................................................................................... 205
Articulation frame lock......................................................................................................................................... 126
Battery ............................................................................................................................................................. 214
Braking and stopping............................................................................................................................................ 88
Changing attachments........................................................................................................................................ 102
Changing speeds.................................................................................................................................................. 87
Changing the axle oil........................................................................................................................................... 199
Changing the coolant.......................................................................................................................................... 186
Changing the engine oil.......................................................................................................................................171
Changing the engine oil filter............................................................................................................................... 173
Changing the fuel pre-filter.................................................................................................................................. 177
Changing the hydraulic fluid................................................................................................................................ 192
Changing the main fuel filter............................................................................................................................... 177
Changing the return filter element....................................................................................................................... 194
Changing the travel direction................................................................................................................................ 89
Changing travel directions..................................................................................................................................... 86
WL50
I nde x
Changing wheels................................................................................................................................................. 206
Checking / changing the safety filter................................................................................................................... 181
Checking the antifreeze mix................................................................................................................................ 185
Checking the axle oil level................................................................................................................................... 197
Checking the battery acid level........................................................................................................................... 216
Checking the brake fluid level / adding brake fluid.............................................................................................. 202
Checking the coolant level / refilling the coolant................................................................................................. 184
Checking the engine oil level.............................................................................................................................. 169
Checking the hydraulic fluid level........................................................................................................................ 190
Check main air filter element / clean / replace.................................................................................................... 180
Cleaning the cooling system............................................................................................................................... 187
Coupling of attachments..................................................................................................................................... 104
Daily servicing..................................................................................................................................................... 146
Depressurized return line...................................................................................................................................... 99
Description of the indicator, warning and control elements.................................................................................. 46
Detent mechanism for the optional hydraulics...................................................................................................... 97
Differential lock................................................................................................................................................... 100
Dimensions........................................................................................................................................................... 44
Disconnecting the drive (Bypass- switching)....................................................................................................... 124
Each time before starting work............................................................................................................................. 91
Electrical connector on the loader lift arms......................................................................................................... 120
Filling the container for the windshield washer system......................................................................................... 75
First inspection after 50 operating hours............................................................................................................. 148
Fueling ................................................................................................................................................................................. 58
Fuel system......................................................................................................................................................... 176
243
244
I nde x
Fuse allocation.................................................................................................................................................... 210
Headlights and rotating beacon............................................................................................................................ 76
Hydraulic fluid cooler........................................................................................................................................... 189
If the engine does not start................................................................................................................................... 83
Independent driving onto the transport device.................................................................................................... 130
Inflating the tires.................................................................................................................................................. 204
Inspection after 500 operating hours.................................................................................................................. 150
Inspection intervals............................................................................................................................................. 153
Jump-starting / emergency starting.................................................................................................................... 218
Lighting system and forward warning device........................................................................................................ 72
Loader data........................................................................................................................................................... 41
Loader lift arm damping.......................................................................................................................................118
Loader lift arms locking system............................................................................................................................. 94
Loader Tie-Down................................................................................................................................................ 130
Loader travel......................................................................................................................................................... 88
Loading on a transport vehicle............................................................................................................................ 128
Loading with crane.............................................................................................................................................. 128
Lubrication schedule........................................................................................................................................... 158
Operating lever for Loader lift arms....................................................................................................................... 92
Preheating............................................................................................................................................................. 83
Rear window heating............................................................................................................................................. 77
ROPS / FOPS - protective structures.................................................................................................................... 22
Safety belt............................................................................................................................................................. 69
Servicing the air filter system.............................................................................................................................. 179
Servicing the axles.............................................................................................................................................. 197
WL50
I nde x
Servicing the battery........................................................................................................................................... 215
Servicing the brakes............................................................................................................................................ 201
Servicing the electrical system........................................................................................................................... 210
Servicing the engine........................................................................................................................................... 169
Servicing the fuel system.................................................................................................................................... 175
Servicing the hydraulic system............................................................................................................................ 188
Servicing the tires and wheels............................................................................................................................ 204
Servicing the water separator............................................................................................................................. 176
Specifications and filling quantities..................................................................................................................... 163
Starting the engine................................................................................................................................................ 81
Technical descriptions........................................................................................................................................... 39
The rotating beacon.............................................................................................................................................. 77
Tilting the operator’s platform............................................................................................................................. 166
Tip-overs115
Towing equipment............................................................................................................................................... 123
Troubleshooting and emergency maintenance................................................................................................... 224
Troubleshooting for the loader............................................................................................................................ 227
Troubleshooting for transmission pump / oil engine............................................................................................ 226
Uncoupling attachments..................................................................................................................................... 107
Ventilation filter / hydraulic fluid filler neck........................................................................................................... 190
Venting the fuel system....................................................................................................................................... 178
Venting the hydraulic system............................................................................................................................... 196
Weekly servicing................................................................................................................................................. 147
Wipers and windshield washer system................................................................................................................. 74
Working with the bucket.......................................................................................................................................112
245
246
L ist of figures
List of figures
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15
Fig. 16
Fig. 17
Fig. 18
Fig. 19
Fig. 20
Fig. 21
Fig. 22
Fig. 23
Fig. 24
Document pocket................................................................................................................................... 11
Transport of large bales or packaged goods......................................................................................... 23
Location of the Safety labels.................................................................................................................. 29
Fire extinguisher.................................................................................................................................... 34
Attaching the rotating beacon................................................................................................................ 34
Seat belt................................................................................................................................................. 35
Emergency exit...................................................................................................................................... 36
Battery disconnect switch...................................................................................................................... 37
Switch for loader lift arms lock............................................................................................................... 38
Vehicle ID............................................................................................................................................... 43
Dimensions............................................................................................................................................ 44
Operating elements................................................................................................................................ 46
Control and warning lights..................................................................................................................... 48
Indicator devices.................................................................................................................................... 52
Rotary switches..................................................................................................................................... 53
Rocker switches 1.................................................................................................................................. 54
Rocker switches 2.................................................................................................................................. 54
Rocker switches 3.................................................................................................................................. 56
Fuel filler neck........................................................................................................................................ 59
Cab door locking mechanism................................................................................................................ 62
Window locking mechanism.................................................................................................................. 63
Window arrest........................................................................................................................................ 63
Door arrest............................................................................................................................................. 64
Release door arrest............................................................................................................................... 64
WL50
Fig. 25
Fig. 26
Fig. 27
Fig. 28
Fig. 29
Fig. 30
Fig. 31
Fig. 32
Fig. 33
Fig. 34
Fig. 35
Fig. 36
Fig. 37
Fig. 38
Fig. 39
Fig. 40
Fig. 41
Fig. 42
Fig. 43
Fig. 44
Fig. 45
Fig. 46
Fig. 47
Fig. 48
L ist of figures
Door put-up hinges................................................................................................................................ 65
Adjusting the operator’s seat................................................................................................................. 66
Adjusting the steering column................................................................................................................ 68
Buckling the seat belt............................................................................................................................. 70
Adjusting the seat belt............................................................................................................................ 71
Lighting / forward warning device.......................................................................................................... 73
Switches for windshield wipers.............................................................................................................. 74
Location of the windshield washer container......................................................................................... 75
Headlight and rotating beacon switches................................................................................................ 76
Heating controller................................................................................................................................... 78
Ventilation jets........................................................................................................................................ 79
Rocker switch for air conditioning system.............................................................................................. 79
Starting switch....................................................................................................................................... 82
Changing direction................................................................................................................................. 87
Operating lever for loader lift arms........................................................................................................ 93
Switch for the locking mechanism of the loader lift arms...................................................................... 94
Operating lever for the optional hydraulics ........................................................................................... 95
Three-way valve..................................................................................................................................... 96
Hydraulic connections............................................................................................................................ 96
Button for optional hydraulics................................................................................................................ 99
Depressurized return line....................................................................................................................... 99
Switch for differential lock.................................................................................................................... 101
Switching the three-way valve............................................................................................................. 105
Coupling the hydraulic locking mechanism.......................................................................................... 107
247
248
L ist of figures
Fig. 49
Fig. 50
Fig. 51
Fig. 52
Fig. 53
Fig. 54
Fig. 55
Fig. 56
Fig. 57
Fig. 58
Fig. 59
Fig. 60
Fig. 61
Fig. 62
Fig. 63
Fig. 64
Fig. 65
Fig. 66
Fig. 67
Fig. 68
Fig. 69
Fig. 70
Fig. 71
Fig. 72
Control lever movements......................................................................................................................110
Level indicator.......................................................................................................................................111
Loading work 1......................................................................................................................................112
Loading work 2......................................................................................................................................113
Loading work 3......................................................................................................................................113
Excavation work 4.................................................................................................................................114
Excavation work 5.................................................................................................................................114
Switch for loader lift arm damping........................................................................................................119
Electrical connector on the loader lift arms......................................................................................... 120
Switch for the electrical connector on the loader lift arms................................................................... 120
Towing equipment................................................................................................................................ 123
Disconnecting the drive....................................................................................................................... 124
Articulation frame lock......................................................................................................................... 127
Attachment point label......................................................................................................................... 129
Attachment points................................................................................................................................ 129
Tie down point label............................................................................................................................. 131
Tie down points.................................................................................................................................... 131
Tying down the loader.......................................................................................................................... 132
Emergency lowering of the loader lift arms......................................................................................... 133
Reducing residual pressure................................................................................................................. 135
Load holding control valve................................................................................................................... 136
Points of lubrication.............................................................................................................................. 158
Opening the engine enclosure............................................................................................................. 165
Position of the cab mounting bolts....................................................................................................... 167
WL50
Fig. 73
Fig. 74
Fig. 75
Fig. 76
Fig. 77
Fig. 78
Fig. 79
Fig. 80
Fig. 81
Fig. 82
Fig. 83
Fig. 84
Fig. 85
Fig. 86
Fig. 87
Fig. 88
Fig. 89
Fig. 90
Fig. 91
Fig. 92
Fig. 93
Fig. 94
Fig. 95
Fig. 96
L ist of figures
Tilting the cab....................................................................................................................................... 167
Cab safety support............................................................................................................................... 168
Checking the engine oil / filling the oil.................................................................................................. 170
Engine oil drain opening...................................................................................................................... 172
Location of the engine oil filter..............................................................................................................174
Position of the fuel filters...................................................................................................................... 176
Water separator................................................................................................................................... 176
Main fuel filter....................................................................................................................................... 177
Fuel hand-feed pump........................................................................................................................... 178
Location of the air filter......................................................................................................................... 180
Air filter elements................................................................................................................................. 180
Engine temperature sensor.................................................................................................................. 183
Hydraulic oil temperature sensor......................................................................................................... 183
Radiator opening.................................................................................................................................. 185
Checking the antifreeze mix................................................................................................................ 185
Cleaning the cooling system................................................................................................................ 187
Hydraulic fluid cooler............................................................................................................................ 189
Ventilation filter..................................................................................................................................... 191
Hydraulic fluid dip stick........................................................................................................................ 191
Hydraulic fluid drain plugs.................................................................................................................... 193
Return filter.......................................................................................................................................... 195
Filter insert........................................................................................................................................... 195
Differential............................................................................................................................................ 197
Transfer case....................................................................................................................................... 198
249
250
L ist of figures
Fig. 97
Fig. 98
Fig. 99
Fig. 100
Fig. 101
Fig. 102
Fig. 103
Fig. 104
Wheel reduction................................................................................................................................... 198
Brake fluid container............................................................................................................................ 203
Cab vent filter....................................................................................................................................... 208
Master fuses.........................................................................................................................................211
Fuse boxes............................................................................................................................................211
Fuse allocation..................................................................................................................................... 212
Location of the battery......................................................................................................................... 215
Connecting the jumper cables............................................................................................................. 219
WL50
L ist of figures
251
Wacker Construction Equipment AG
Preußenstraße 41
80809 München
Tel. +49 89 35402-0
Fax +49 89 35402-390
Wacker Neuson Corporation
P.O. Box 9007
Menomonee Falls, WI 53052-9007
Tel. +1 262 255-0500
Fax +1 262 255-0550
Tel.: 800 770-0957
Wacker Machinery (HK) Ltd.
Skyline Tower, Suite 2303, 23/F
39 Wang Kwong Road, Kwoloon Bay
Hong Kong
Tel.: +852 3188 5506
Fax: +852 2406 6021
Art.-Nr.: 2846724
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