U48-4 Operator Manual
OPERATOR'S MANUAL
U.S.A.
: KUBOTA TRACTOR CORPORATION
3401 Del Amo Blvd., Torrance, CA 90503, U.S.A.
Telephone : (310)370-3370
Western Division : 1175 S. Guild Avc., Lodi, CA 95240
Telephone : (209)334-9910
Central Division
: 14855 FAA Blvd., Fort Worth, TX 76155
Telephone : (817)571-0900
Northern Division : 6300 at One Kubota Way, Groveport, OH 43125
Telephone : (614)835-1100
Southeast Division : 1025 Northbrook Parkway, Suwanee, GA 30024
Telephone : (770)995-8855
Canada
: KUBOTA CANADA LTD.
5900 14th Avenue, Markham, Ontario, L3S 4K4, Canada
Telephone : (905)294-7477
France
: KUBOTA EUROPE S.A.S
19-25, Rue Jules Vercruysse, Z.I. BP88, 95101 Ar㷅enteuil Cedex, France
Telephone : (33)1-3426-3434
Italy
: KUBOTA EUROPE S.A.S Italy Branch
Via Grandi, 29 20068 Peschiera Borrome (MI) Italy
Telephone : (39)02-51650377
Germany : KUBOTA (DEUTSCHLAND) GmbH
Senefelder Str. 3-5 63110 Rod㷅au /Nieder-Roden, Germany
Telephone : (49)6106-873-0
U.K.
: KUBOTA (U.K.) LTD.
Dormer Road, Thame, Oxfordshire, OX9 3UN, U.K.
Telephone : (44)1844-214500
Spain
: KUBOTA ESPAÑA S.A.
Avenida Recomba No.5, Poli㷅no Industrial la La㷅una, Le㷅anes, 28914 (Madrid) Spain
Telephone : (34)91-508-6442
Australia : KUBOTA TRACTOR AUSTRALIA PTY LTD.
25-29 Permas Way, Tru㷅anina, VIC 3029, Australia
Telephone : (61)-3-9394-4400
Malaysia : SIME KUBOTA SDN. BHD.
No.3 Jalan Sepadu 25/123 Taman Perindustrian Axis,
Seksyen 25, 40400 Shah Alam, Selan㷅or Darul Ehsan Malaysia
Telephone : (60)3-736-1388
Philippines : KUBOTA PHILIPPINES, INC.
155 Panay Avenue, South Trian㷅le Homes, 1103 Quezon City, Philippines
Telephone : (63)2-9201071
Taiwan
: SHIN TAIWAN AGRICULTURAL MACHINERY CO., LTD.
16, Fen㷅pin㷅 2nd Rd, Taliao Shian㷅 Kaohsiun㷅 83107, Taiwan R.O.C.
Telephone : (886)7-702-2333
Indonesia : PT. KUBOTA MACHINERY INDONESIA
Tower A at Ei㷅htyEi㷅[email protected] Lantai 16
Jalan Raya Casablanka Kav. 88, Jakarta 12870 Indonesia
Telephone : (62)-21-29568-720
Thailand : SIAM KUBOTA CORPORATION CO., LTD.
101/19-24 Moo 20, Navanakorn Industrial Estate, Tambon Khlon㷅nuen㷅, Amphur Khlon㷅luan㷅,
Pathumthani 12120, THAILAND
Telephone : (66)2-909-0300
Korea
: KUBOTA KOREA CO., LTD.
106-24 Mon㷅san-Ri, Mankyun㷅-Up, Kimje-City, Chonrapuk-Do, KOREA
Telephone : (82)-63-544-5822
India
: KUBOTA AGRICULTURAL MACHINERY INDIA PVT. LTD.
Re㷅us, Level 2 Altius, Olympia Tech Park, No.1 SIDCO Industrial Estate, Guindy, Chennai 600032, TN, India
Telephone : (91)-44-4299-4237
Vietnam
: KUBOTA VIETNAM CO., LTD.
Lot B-3A2-CN, My Phuoc 3 Industrial Park, Ben Cat District, Binh Duon㷅 Province, Vietnam
Telephone : (84)-650-3577-507
KUBOTA Corporation
MODEL
U
4
8
4
-
English (Australia)
Code No. RD458-8131-2
KUBOTA
EXCAVATOR
1BAAABYAP2340
U48-4
1BAAABYAP2350
READ AND SAVE THIS MANUAL
PRINTED IN JAPAN
© KUBOTA Corporation 2013
1306-0457
ABBREVIATION LIST
Abbreviations
API
Definitions
American Petroleum Institute
ASTM
American Society for Testing and Materials, USA
CECE
Committee for European Construction Equipment
DIN
German Institute for Standards, Federal Republic of Germany
EN
European Standard
FOPS
FRONT
Hi
Falling Object Protective Structures
"Front" means the front view towards the boom and dozer
High speed
ISO
International Standardization Organization
JIS
Japanese Industrial Standard
L
L/min
Volume (Liter)
Liter per minute
Lo
Low speed
MIL
Military Standards
rpm
Revolutions per minute
ROPS
SAE
TPSS
AI
Roll-Over Protective Structures
Society of Automotive Engineers, USA
Two Pattern Selection System
Auto Idle
U48-4
AR. G. 2-2. 0. K
1306-0457
GENERAL SYMBOLS
The instruments and operation elements have been marked with a series of symbols in order to simplify the operation of your excavator. These symbols are listed below with the respective descriptions.
Safety alert Symbol
Boom swing (Left)
Warning lamp “Fuel level too low”
Boom swing (Right)
System lamp
Dozer raise
Warning lamp “Engine Oil pressure “
Dozer lower
Warning lamp “Battery charge”
Operation direction of control lever
Warning lamp “Auto Idle (AI) Lamp”
Operation direction of control lever
Indicator lamp “Glow”
Read operator’s manual
Working light switch
Lock
Horn
Unlock
Wiper/Washer switch
Engine stop control lamp
Diesel
Hydraulic fluid
Gear oil
Grease
Fast
Slow
Excavator - Overhead view, movement toward
the front
Excavator - Overhead view, movement toward
the rear
Boom raise
Boom lower
Arm out
Arm in
Bucket crowd
Bucket dump
FOREWORD
You are now the proud owner of a KUBOTA excavator. This excavator is a
product of KUBOTA quality engineering and manufacturing. It is made of
excellent materials and under rigid quality control systems. It will give you
long, satisfactory service. To obtain the best use of your excavator, please
read this manual carefully. It will help you become familiar with the operation
of the excavator and contains many helpful hints about excavator
maintenance. It is KUBOTA's policy to utilize as quickly as possible every
advance in our research. The immediate use of new techniques in the
manufacture of products may cause sections of this manual to become
outdated. KUBOTA distributors and dealers will have the most up-to-date
information. Please do not hesitate to consult with them.
SAFETY FIRST
This symbol, the industry's "Safety Alert Symbol", is used throughout
this manual and on labels on the machine itself to warn of the
possibility of personal injury. Read these instructions carefully. It is
essential that you read the instructions and safety regulations before
you attempt to assemble or use this unit.
DANGER :
Indicates an imminently hazardous situation
which, if not avoided, will result in death or serious
injury.
WARNING :
Indicates a potentially hazardous situation which,
if not avoided, could result in death or serious
injury.
CAUTION :
Indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate
injury.
IMPORTANT :
Indicates that equipment or property damage
could result if instructions are not followed.
NOTE :
Gives helpful information.
CONTENTS
SAFE OPERATION ............................................................................................
-1
DEALER SERVICE...................................................................................................... 1
TECHNICAL DATA...................................................................................................... 2
DESCRIPTION OF MACHINE PARTS........................................................................ 3
INSTRUMENT PANEL AND CONTROL ELEMENTS................................................. 4
CHECKS BEFORE START ......................................................................................... 6
DAILY CHECKS....................................................................................................... 6
CHECKING THE DEVICES ..................................................................................... 6
Starter Switch ................................................................................................................... 6
Display Selector Switch .................................................................................................... 7
LCD Display for Normal Operation ................................................................................... 7
Warning Lamp ................................................................................................................ 10
LCD Display for Warning ................................................................................................ 10
Setting the Clock............................................................................................................. 12
Reordering the year/month/day and Changing the AM/PM System to the 24-hour One 13
Log Record ..................................................................................................................... 14
Periodic Check................................................................................................................ 15
If All the Check Points are not Displayed at a Glance on a Single Screen..................... 15
When the Check-up is Completed .................................................................................. 17
Horn Switch .................................................................................................................... 17
Working Light Switch ...................................................................................................... 17
AUX Port Flow Rate Limit Switch ................................................................................... 17
Auto Idle Switch .............................................................................................................. 18
Throttle Potentiometer .................................................................................................... 18
Travel Speed Switch....................................................................................................... 18
CAB TYPE MACHINES ......................................................................................... 19
Wiper/Washer Switch ..................................................................................................... 19
Interior Lamp................................................................................................................... 19
Cab Light Switch............................................................................................................. 20
Heater Switch ................................................................................................................. 20
Opening/Closing of CAB Door ........................................................................................ 20
Opening/Closing of Front CAB Window.......................................................................... 21
Opening/Closing of Side CAB Window........................................................................... 21
Emergency Hammer....................................................................................................... 21
AIR CONDITIONER ............................................................................................... 22
Air Flow........................................................................................................................... 22
Air Control Vent .............................................................................................................. 23
Control Panel .................................................................................................................. 23
Operation ........................................................................................................................ 23
HANDLING THE SAFETY DEVICES..................................................................... 23
Pilot Control Lock Lever.................................................................................................. 23
OPERATION OF THE ENGINE................................................................................. 24
STARTING THE ENGINE ...................................................................................... 24
STARTING THE ENGINE UNDER COLD CONDITIONS...................................... 25
CONTENTS
STARTING WITH AN AUXILIARY BATTERY ....................................................... 26
Observe Following Guidelines when Starting with an Auxiliary Battery.......................... 26
CHECK POINTS AFTER STARTING THE ENGINE ............................................. 27
STOPPING THE ENGINE...................................................................................... 27
Engine Stop Button......................................................................................................... 27
Precautions in case of Overheat..................................................................................... 27
EXCAVATOR OPERATION ...................................................................................... 28
RUNNING-IN OF THE NEW EXCAVATOR........................................................... 28
Do not Work with Full Engine Rpm's or Full Loads during the First 50 Working Hours.. 28
Oil Change in the Run-in Stage ...................................................................................... 28
Adjusting the Operator's Seat......................................................................................... 28
Seat Belt ......................................................................................................................... 29
STARTING ............................................................................................................. 29
Pilot Control Lock Lever.................................................................................................. 29
DRIVING ................................................................................................................ 30
Drive Levers(Right,Left).................................................................................................. 31
TURNS................................................................................................................... 31
Pivot Turn ....................................................................................................................... 31
Spin Turn ........................................................................................................................ 32
UP AND DOWNHILL DRIVING.............................................................................. 33
PARKING ON A SLOPE ........................................................................................ 33
OPERATION OF THE DOZER .............................................................................. 33
TWO PATTERN SELECTION SYSTEM(TPSS) .................................................... 34
Pattern Change............................................................................................................... 34
OPERATION OF THE BOOM................................................................................ 35
OPERATION OF THE ARM................................................................................... 35
OPERATION OF THE BUCKET ............................................................................ 36
UNIT SWING AND BOOM SWING OPERATION.................................................. 36
Unit Swing Operation...................................................................................................... 36
Boom Swing Operation................................................................................................... 36
AUXILIARY PORT OPERATION ........................................................................... 37
Selecting the Action Modes ............................................................................................ 37
AUX Port Handling Procedure ........................................................................................ 38
Setting the Maximum Flow Volume ................................................................................ 40
HOW TO RELEASE PRESSURE TRAPPED IN THE HYDRAULIC SYSTEM...... 45
1-way or 2-way CIRCUIT SELECTION VALVE OPERATION ............................... 46
AUTO IDLE (AI) OPERATION ............................................................................... 47
IMPORTANT INFORMATION ON EXCAVATOR OPERATION ............................ 47
TRANSPORTING THE EXCAVATOR ON A VEHICLE............................................. 48
LIFTING OF THE EXCAVATOR................................................................................ 50
MAINTENANCE......................................................................................................... 52
MAINTENANCE INTERVALS ................................................................................ 52
OPENING AND CLOSING OF COVERS............................................................... 55
Opening/Closing of the Engine Hood ............................................................................. 55
Opening/Closing of the Side Cover ................................................................................ 55
Where to store the Tool .................................................................................................. 56
Where to store the Grease Gun...................................................................................... 56
Where to keep Operator's Manual.................................................................................. 57
CONTENTS
Cup Holder...................................................................................................................... 57
DAILY CHECKS..................................................................................................... 57
Checking Coolant Level.................................................................................................. 57
Checking Fuel Level ....................................................................................................... 58
Checking Engine Oil Level.............................................................................................. 58
Checking Hydraulic Oil Level.......................................................................................... 59
Checking V-belt .............................................................................................................. 59
Checking Radiator and Oil Cooler .................................................................................. 60
Checking Washer Liquid................................................................................................. 61
Cleaning Pre-Cleaner ..................................................................................................... 61
Checking and Cleaning Engine and Electrical Wiring..................................................... 61
Greasing Boom Swing Fulcrum ...................................................................................... 61
Washing Whole Machine ................................................................................................ 61
Greasing Front Attachments (without Bucket Pin and Boom Swing Fulcrum)................ 62
Greasing Bucket Pin and Bucket Link Pin ...................................................................... 62
REGULAR CHECKS AND MAINTENANCE WORK ................................................. 63
EVERY 50 SERVICE HOURS ............................................................................... 63
Draining the Water from the Fuel Tank........................................................................... 63
Draining Water Separator ............................................................................................... 63
Battery ............................................................................................................................ 64
Battery Charging............................................................................................................. 65
Greasing Swing Bearing Teeth....................................................................................... 65
EVERY 200 SERVICE HOURS ............................................................................. 66
Adjusting V-belt Tension................................................................................................. 66
Checking Radiator Hoses and Clamps........................................................................... 67
Inspection and Cleaning Air Filter Element..................................................................... 67
Air Filter Maintenance..................................................................................................... 68
Greasing Swing Ball Bearing .......................................................................................... 68
Checking Fuel Line and Intake Air Line .......................................................................... 69
AIR CONDITIONER ............................................................................................... 69
Cleaning Air Filter ........................................................................................................... 69
Checking Air-Conditioner Condenser ............................................................................. 70
EVERY 250 SERVICE HOURS ............................................................................. 70
Changing Engine Oil (First Engine Oil Change after 50 Service Hours) ........................ 70
Replacing Engine Oil Filter ............................................................................................. 71
EVERY 500 SERVICE HOURS ............................................................................. 71
Drive unit Oil Change(First Oil Change of the 50 hours) ................................................ 71
Replacing Fuel Filter Cartridge ....................................................................................... 72
Replacing Breather Filter ................................................................................................ 72
EVERY 1000 SERVICE HOURS ........................................................................... 72
Replacing the Hydraulic Pilot Filter Element................................................................... 72
Replacing Hydraulic Return Filter Element..................................................................... 73
Hydraulic Oil Change (Including Replacing of the Suction Filter in the Hydraulic Tank) 73
Hydraulic Oil Check with Hydraulic Hammers ................................................................ 74
EVERY 1000 SERVICE HOURS OR ONCE A YEAR ........................................... 75
Replacing Air Filter Element ........................................................................................... 75
EVERY 1500 SERVICE HOURS ........................................................................... 75
Checking Fuel Injection Nozzle(Injection Pressure) ....................................................... 75
EVERY 2000 SERVICE HOURS ........................................................................... 75
Changing Front Idler and Track Roller Oil ...................................................................... 75
Checking the Alternator and Starter Motor ..................................................................... 75
CONTENTS
EVERY 3000 SERVICE HOURS ........................................................................... 75
Checking Injection Pump ................................................................................................ 75
ANNUAL SERVICING............................................................................................ 75
Electrical Wiring and Fuses ............................................................................................ 75
Checking the Electrical Circuit ........................................................................................ 75
Checking Air-Conditioner Pipes and Hoses.................................................................... 75
BIENNIAL SERVICING .......................................................................................... 76
Replacing Air-Conditioner Pipes and Hoses................................................................... 76
Replacement of Radiator Hoses and Hose Clamps ....................................................... 76
Changing Radiator Coolant ............................................................................................ 76
Replacing Fuel Hoses and Clamps ................................................................................ 77
Replacing Intake Air line ................................................................................................. 78
SERVICING AS REQUIRED.................................................................................. 78
Checking Amount of Refrigerant (gas) ........................................................................... 78
OTHER ADJUSTMENTS AND REPLACEMENTS.................................................... 79
PURGING OF THE FUEL SYSTEM ...................................................................... 79
ADJUSTMENT OF TRACKS ................................................................................. 79
Special Information when Using Rubber Tracks............................................................. 80
CHANGING THE BUCKET .................................................................................... 81
FUSES ................................................................................................................... 81
Replacing Fuses ............................................................................................................. 81
Fuse Capacities and Circuits .......................................................................................... 82
Auxiliary Electric ............................................................................................................. 83
Slow Blow Fuse .............................................................................................................. 83
TROUBLESHOOTING............................................................................................... 84
OPERATION UNDER COLD WEATHER CONDITIONS .......................................... 86
PREPARATION FOR OPERATION IN COLD WEATHER .................................... 86
PROCEDURE AFTER DONE WORK.................................................................... 86
LONG STORAGE ...................................................................................................... 87
RECOMMENDED OILS............................................................................................. 89
APPENDICES............................................................................................................ 90
MAIN DIMENSIONS .............................................................................................. 90
LIFTING CAPACITY .................................................................................................. 91
LIST OF SCREENS................................................................................................... 96
LIST OF NORMAL SCREENS............................................................................... 96
NAVIGATION LIST OF SCREENS ........................................................................ 97
SAFE OPERATION
-1
SAFE OPERATION
Careful operation is your best insurance against an
accident.
Read and understand this manual carefully, before
operating the excavator.
Every user, however experienced, should carefully read
and understand this manual and those of the attachments
and accessories before operating the excavator. The
owner is obliged to inform all operators of these
instructions in detail.
Keep this manual in the storage location. (See "Where to
keep Operator's Manual" in "MAINTENANCE" section.)
1.
5. The seat belt must be inspected regularly and
replaced if frayed or damaged.
BEFORE OPERATION
1. Know your equipment and its limitations. Read and
understand this entire manual before attempting to
start and operate the excavator.
2. Obey the danger, warning and caution labels on the
machine.
3. For your safety, a ROPS/FOPS (Roll-Over Protective
Structure, Falling Objects Protective Structure.) with a
seat belt is installed by KUBOTA. Always use the seat
belt when the machine is equipped with a ROPS/
FOPS as this combination will reduce the risk of
serious injury or death, should the excavator be upset
or falling objects occur.
Do not modify any structural members of the ROPS/
FOPS by welding, drilling, bending, grinding or cutting,
as this may weaken the structure. If any component is
damaged, replace it. Do not attempt repairs. If the
ROPS/FOPS is loosened or removed for any reason,
make sure all parts are reinstalled correctly. Tighten
mounting bolts to proper torque.
4. ROPS/FOPS structure complies with ISO 3471, ISO
3449 and OSHA regulations.
(1) Seat belt
6. Always sit in the operator's seat when starting engine
or operating levers or controls.
7. Study control lever pattern A and pattern B. Then
choose the one which is most familiar.
Familiarize yourself with the pattern selected by
operating the unit slowly and at low engine speed.
A Engage the lever lock to prevent accidental pattern
change.
(1) Pattern selector lever
(Two Pattern Selection System:TPSS)
(2) Lever lock
(A) "Pattern A"
(B) "Pattern B"
8. Do not operate the excavator while under the influence
of alcohol, medication, controlled substances or while
fatigued.
-2
SAFE OPERATION
9. Check the surroundings carefully before using the
excavator or when attachments are being attached.
A Pay attention to the overhead clearance with electric
wires.
11. Do not wear baggy, torn or oversized clothing when
working with the excavator as such clothing can get
caught in rotating parts or control elements which can
cause accidents or injuries. Wear adequate safety
clothing, e.g. safety helmet, safety shoes, eye
protection, ear protection, working gloves, etc., as
necessary and as prescribed by law or statutes.
A Check for pipes and buried cables before digging.
A Check for hidden holes, obstacles, soft underground,
and overhangs.
(1) Helmet
(2) Clothing fit for work
(3) Tight seams
(4) Good grip footwear
(5) Well fitting cuffs
(6) Working gloves
A Do not allow any persons within the working range of
the excavator during operation.
A Check local regulations before digging and call
diggers
hotline
before
working,
www.diggershotline.com or 811 (WI) and www.nediggers.com or 1-800-331-5666 (NE).
10. Do not allow anyone to use the excavator until they
have been advised of the work to be performed and
they have indicated that they have read and
understood the operator's manual.
(7) Straw hat
(8) Towel
(9) Baggy trousers
(10) Loose cuffs of the shirt
(11) Baggy shirt
(12) Rubber sandals
12. Do not allow passengers to ride on any part of the
excavator at anytime. The operator must remain in the
excavator seat during operation.
13. Check levers, pedals and all mechanical parts for
correct adjustment and wear. Replace worn or
damaged parts immediately. Check nuts and bolts
regularly for correct torque.
14. Keep your excavator clean. Heavy soiling, grease,
dust and grass can cause fires, accidents or injuries.
15. Use only KUBOTA authorized attachments.
16. Before starting the excavator, be absolutely sure that
the excavator has been filled with fuel, lubricated,
greased and undergone all necessary maintenance.
17. Do not modify the excavator, as such it could lead to
unforeseen safety problems.
18. Do not operate a hydraulic hammer on anything that is
above the operator's seat level as objects may fall into
the operator station.
19. Make sure attachments, particularly those utilizing
quick attach systems, are securely mounted.
20. Install protective guards on the excavator when
working in areas where objects may fall or be thrown.
SAFE OPERATION
2.
OPERATING THE EXCAVATOR
1. Mount and dismount the machine safely. Always face
the machine. Always use handrails and available
steps and keep yourself well balanced. Do not grab or
hold any of the control levers and switches. Do not
jump on or off the machine, whether stationary or in
motion.
2. Start and control the excavator only from the
operator's seat. The driver should not lean out of his
seat when the engine is running.
3. Before starting the engine, make sure that the lock
levers are in the "Lock" position and all control levers
and pedals are in their neutral positions and the seat
belt is fastened correctly.
4. Before operating the excavator, make sure that the
dozer blade is in front of you. If the levers are activated
with the dozer blade at the rear, the tracks will move in
the opposite direction of the drive levers.
5. Do not operate or idle engine in a non-ventilated area.
Carbon monoxide gas is colorless, odorless, and
deadly.
6. Keep all safety equipment and covers in place.
Replace damaged or missing safety devices.
-3
7. When operating, keep hands and body inside of the
ROPS / FOPS protective envelope.
Do not touch or depress the control levers or the
pedals from outside the cab while the engine is
running.
8. Take precautions against tipping over. Stay away from
steep slopes and embankments. Do not swing the
bucket downhill. Lower the dozer blade when digging.
Keep the bucket as low as possible while driving uphill.
Turn slowly on slopes (at reduced speed). Do not
place the excavator near the edges of trenches and
banks, as the earth can give away due to the weight of
the excavator.
ALLOWABLE CLIMBING ANGLE : 36 % (20 deg.)
ALLOWABLE ANGLE CROSS : 27 % (15 deg.)
9. Watch where you are going at all times.
Watch for and avoid obstacles. Remain alert for trees,
wires and other obstructions.
C Safety for children
Tragedy can occur if the operator is not alert to the
presence of children. Children generally are attracted to
machines and the work they do.
1. Never assume that children will remain where you last
saw them.
2. Keep children out of the work area and under the
watchful eye of another responsible adult.
3. Be alert and shut your machine down if children enter
the work area.
4. Never carry children on your machine. There is not a
safe place for them to ride. They may fall off and be run
over or interfere with your control of the machine.
5. Never allow children to operate the machine even
under adult supervision.
6. Never allow children to play on the machine or on the
attachments.
7. Use extra caution when backing up. Look behind and
down to make sure the area clear before moving.
8. When parking your machine, if at all possible, park on
a firm, flat and level surface; if not, park across a slope.
Lower the bucket and dozer to the ground, stop the
engine, release pressure in the hydraulic system,
place the pilot control lock lever in the locked position,
remove the key and lock the cab door (if equipped),
before you leave.
-4
3.
SAFE OPERATION
AFTER OPERATION
Before leaving the machine,
A Park the excavator on a firm, flat and level surface. If
this is not possible, park across the slope.
A Lower the attachments and the dozer blade to the
ground.
A Stop the engine.
A Release pressure in the hydraulic system.
A Lock all control levers.
A Remove the key.
A Lock the cab door (if equipped)
4.
SAFE LOADING AND TRANSPORT OF
THE EXCAVATOR
1. Observe all regulations concerning the transport of
excavators on public roads.
2. Use adequately long and robust ramps when loading
on the machine. (for details see "TRANSPORTING
THE EXCAVATOR ON A VEHICLE")
3. Do not change the running direction and to avoid
tipping over, do not try to swing the attachment
crosswise to the loading ramps.
4. Lower the attachment on the loading bed and release
the pressure from the hydraulic system.
After loading the excavator on the truck, block the
tracks with blocks and tie down the excavator at the
appropriate locations.
(1) Chain
(2) Block
5. Avoid abrupt braking of the vehicle with the excavator
loaded. Sudden braking cause the excavator to move
and may cause a serious accident.
6. When towing the excavator or pulling a load, the load
must be less than the strength of the towing line
attached to excavator. The towing eye should not be
used for tie down or lifting of the machine.
(1) Pilot control lock lever
(A) "Unlock"
(B) "Locked"
(1) Tow line
SAFE OPERATION
Max. drawbar pull at
coupling hook
116.9 kN (11920 kgf)
Max. vertical load at
coupling hook
12.1 kN (1234 kgf)
-5
7. Do not open the radiator cap before the radiator has
cooled down sufficiently
First loosen the cap to the first stop and allow the
system enough time to release the remaining
pressure. Then loosen the cap completely.
7. Do not use the hooks on the roof of CAB for lifting the
excavator.
5.
MAINTENANCE
Before doing maintenance work on the excavator, place
the machine on a firm, flat and level surface, lower the
attachments to the ground, stop the engine, release
pressure trapped in the hydraulic system, lock all control
levers and remove the key. When dismantling hydraulic
parts, make sure that the hydraulic oil has cooled down
sufficiently to avoid burns.
Start maintenance work carefully, e.g. loosen plug slowly
so that oil will not squirt out.
1. Before doing work on the engine, the exhaust system,
the radiator and the hydraulics, let the excavator cool
down sufficiently.
2. Always turn off the engine when filling the fuel tank.
Avoid spilling and over-filling of fuel.
3. Smoking is prohibited while refueling or handling the
battery. Keep sparks and fire away from the fuel tank
and battery. Flammable gases escape from the
battery, especially during charging.
4. Do not use or charge a refillable type battery if the fluid
level is below the LOWER (lower limit level) mark.
Otherwise, the battery component parts may
prematurely deteriorate, which may shorten the
battery's service life or cause an explosion. Check the
fluid level regularly and add distilled water as required
so that the fluid level is between the UPPER and
LOWER levels.
5. Read and follow the directions "STARTING WITH AN
AUXILIARY BATTERY" in "OPERATION OF THE
ENGINE", when starting with an auxiliary battery.
6. Keep a first-aid box and a fire extinguisher at hand at
all times.
8. To avoid short-circuiting the battery, always remove
the ground cable first and attach the positive cable
first.
9. Oil under high pressure can penetrate the skin and
may be harmful to your health if not treated
immediately.
10. Leaking hydraulic fluid has enough pressure to
penetrate the skin and cause serious injuries.
Leakages from pin holes can be totally invisible. Do
not use hands for checking for leaks. Always use a
piece of wood or cardboard. It is strongly
recommended that you use a face mask or eye
protection.
Should injuries occur with leaking hydraulic fluid,
contact a doctor immediately. This fluid can cause
gangrene or serious allergic reactions.
11. To avoid environmental damage from acid and heavy
metals, dispose of the battery appropriately.
12. Observe all laws and regulations concerning the
disposal of used oil, coolants, solvents, hydraulic
fluids, battery acids and batteries.
-6
SAFE OPERATION
13. To avoid fire, do not heat the hydraulic components
(tanks, pipes, hoses, cylinders) before they have been
drained and washed.
14. Use eye protection or a face mask to protect the eyes
and respiratory system against dust and other foreign
particles.
15. Securely support excavator with stands or suitable
blocking before working underneath. For your safety,
do not work under any hydraulically supported
devices. They can settle, suddenly leak down, or be
accidentally lowered.
16. Do not dismantle the spring of the track tensioner. If
dismantling is necessary, contact your KUBOTA
dealer where the machine was purchased, or
competent service shop. The assembly must be done
according to the KUBOTA work shop manual (W.S.M.)
for the product involved.
17. When lifting the machine itself with an attachment,
place a safety block or safety post to prevent the
machine from rolling over. Keep the lock lever for
attachment control in the "LOCK" position.
18. Inspect ROPS / FOPS for damage and if damage is
found contact your KUBOTA dealer for repair.
19. KUBOTA does not use asbestos containing
components and recommends against the use of such
components.
Components containing asbestos should be handled
in accordance with applicable regulations and industry
practice.
20. Fire prevention
Excavator and some attachments have components
that are at high temperatures under normal operating
conditions. The primary source of high temperatures is
the engine and exhaust system. The electrical system,
if damaged or incorrectly maintained, can be a source
of arcing or sparks.
The following fire prevention guidelines will help to
keep your equipment up and running efficiently and
keep the risk of fire to a minimum.
A Blow off all accumulated debris near hot engine
exhaust components such as turbocharger and
exhaust manifold as well as exhaust pipes and muffler
more frequently when working in severe conditions.
A Clean out all accumulated flammable debris such as
leaves, straw, pine needles, branches, bark, small
wood chips and any other combustible materials from
inside the machine belly pans or lower unit structures
as well as from area in proximity to the engine.
A Inspect all fuel lines and hydraulic hoses for wear or for
deterioration. Replace them immediately if they begin
to leak.
A Examine electrical wiring and connectors frequently
for damage. Repair any wires that are loose or frayed
before operating the machine. Clean all electrical
connections and tighten all electrical connections as
necessary.
A Inspect the exhaust system daily for any signs of
leakage. Check for broken pipes and muffler and also
for loose or missing bolts, nuts and clamps. If any
exhaust leaks or fractured parts are found, repairs
must be completed prior to operation.
A Always keep a multipurpose fire extinguisher on or
near the machine. Be familiar with the operation of the
fire extinguisher.
SAFE OPERATION
6. DANGER, WARNING AND CAUTION LABELS
-7
-8
SAFE OPERATION
SAFE OPERATION
-9
-10
SAFE OPERATION
SAFE OPERATION
-11
-12
SAFE OPERATION
SAFE OPERATION
7.
1.
2.
3.
4.
-13
CARE OF DANGER, WARNING AND CAUTION LABELS
Keep danger, warning and caution labels, clean and free from obstructing material.
Clean danger, warning and caution labels with soap and water, dry with a soft cloth.
Replace damaged or missing danger, warning and caution labels with new labels from your KUBOTA dealer.
If a component with danger, warning and caution label(s) affixed is replaced with new part, make sure new label(s) is
(are) attached in the same location(s) as the replaced component.
5. Mount new danger, warning and caution labels by applying on a clean dry surface and pressing any bubbles to outside
edge.
DEALER SERVICE
DEALER SERVICE
Your KUBOTA dealer is always ready to help so that your
excavator offers the best performance. After having
carefully read these instructions, you will realize that
much of the routine maintenance can be done by yourself.
Your KUBOTA dealer is responsible for servicing and the
delivery of spare parts. When ordering spare parts from
your KUBOTA dealer, always mention the serial number
of the excavator and the engine.
Note these numbers right away in the supplied lines.
Model
Serial No.
Excavator
Engine
Dealer's name
(To be filled in through the owner)
(1) Serial No.
(1) Engine serial No.
1
2
TECHNICAL DATA
TECHNICAL DATA
KUBOTA EXCAVATOR
U48-4
Model name
Type
Operating weight
(including operator's)
kg
Canopy
CAB
4685
4775
Water cooled 4 cycle diesel
engine with 4 cylinder
Type
(No air conditioner type)
V2607-DI-E3-BH-6
(Air conditioner type)
V2607-DI-E3-BH-4
Model name
Engine
Total displacement
cc
2615
Engine power SAE
J1955 gross
Rated speed
kW
31.2
rpm
2200
Low idling speed
rpm
1050 to 1200
Unit swing speed
rpm
9.3
Fast
km/h
4.9
Slow
km/h
2.8
Travel
speed
Performance Ground pressure
(With operator)
Max. climbing angle
kPa
(kgf/cm )
% (deg)
Angle in case of
crossing slope
Dozer
Width x Height
Left
Boom swing angle
Right
Max.
Pressure
displacement
connection
% (deg)
*27 (15)
mm
rad (deg)
rad (deg)
1960 x 410
1.20 (70)
0.96 (55)
for
attachments
Max. pressure
Fuel tank capacity
A
A
D
D
D
D
A
L / min
MPa
(kgf/cm )
L
27.3
(0.278)
27.9
(0.285)
*36 (20)
65 (AUX 1 port)
37 (AUX 2 port)
[AUX1 port] 20.6
(210)
[AUX 2] 17.2
(175)
68
Above dimensions are based on the machine with rubber track.
Specifications subject to change without notice.
With unloaded digging bucket. (JPN STD Bucket)
Firm compacted soil.
Operators must exercise extra caution and follow instructions in the operator's manual.
Worse condition or heavier attachment to the above will decrease climbing angle.
ROPS/FORS structure complies with standards ISO 3471, ISO 3449 and OSHA regulations
DESCRIPTION OF MACHINE PARTS
DESCRIPTION OF MACHINE PARTS
DEPICTED CONTENTS
(1) Bucket cylinder
(2) Arm
(3) Bucket link 2 and 3
(4) Bucket link 1
(5) Bucket
(6) Swing bracket
(7) Arm cylinder
(8) Canopy
(9) Seat
(10) Swing frame
(11) Boom cylinder
(12) Dozer cylinder
(13) Dozer blade
(14) Boom
(15) Cab
(16) Drive sprocket
(17) Track roller
(18) Front idler
3
4
INSTRUMENT PANEL AND CONTROL ELEMENTS
INSTRUMENT PANEL AND CONTROL ELEMENTS
B Instrument Panel, Switch
(1) LCD display
(2) Horn switch
(3) Travel speed switch
(4) Starter switch
(9) User setting switch (Switch 1)
(10)
(Switch 2)
(11) AUX port enable switch (Switch 3)
(12) Information switch (Switch 4)
(13) Display selector switch (Switch 5)
(5) Throttle potentiometer
(6) Working light switch
(7) Auto idle control switch
(8) Beacon light switch
Ref. page
Starter switch............................................................. 6
LCD display................................................................ 7
Fuel gauge
Water temperature gauge
Hour meter
Engine tachometer
Glow lamp
User setting switch
Overload warning switch
AUX port enable switch
Information switch
Display selector switch............................................... 7
Warning lamp............................................................. 10
Horn switch................................................................ 17
Working light switch................................................... 17
Auto idle control switch............................................... 18
Throttle potentiometer................................................ 18
Travel speed switch................................................... 18
INSTRUMENT PANEL AND CONTROL ELEMENTS
5
B Control Pedals and Levers
(1) Drive lever (left)
(2) Attachment control lever (left)
(3) Boom swing pedal
(4) Drive lever (right)
(5) Attachment control lever (right)
(6) Dozer control lever
(7) Drive pedal (left)
(8) Drive pedal (right)
Ref. page
Drive lever (left) ............................................... 31
Attachment control lever (left) .......................... 35, 36
Boom swing pedal ........................................... 36
Drive lever (right) ............................................. 31
Attachment control lever (right) ....................... 35, 36
Dozer control lever .......................................... 33
6
CHECKS BEFORE START
CHECKS BEFORE START
DAILY CHECKS
In order to avoid damage, it is important to check the
condition of the excavator before starting.
To avoid personal injury:
A Do maintenance work on the excavator only on
level ground with the engine off and the lock
lever in the "Lock" position.
Checks
Go around the excavator and check for visual damage
and wear.
Check coolant level. (See "DAILY CHECKS" in
"MAINTENANCE" section.)
Check fuel level.
Check engine oil level.
Check hydraulic fluid level.
Check air filter for clogging.
Check all grease points.
Check all control lamps, indicators, tachometer and hour
meter.
Check the light system.
Check the seat belt and the ROPS/FOPS safety device.
Check the condition of the safety and warning labels.
(See "DANGER, WARNING AND CAUTION LABELS" in
"SAFE OPERATION" section.)
Inspect ROPS / FOPS for damage and if damage is found
contact your KUBOTA dealer for repair.
CHECKING THE DEVICES
BStarter Switch
A [STOP]
The key can be inserted at the "STOP" position.
A [RUN]
Turn the key one click from the "STOP" position to the
"RUN" position. All the circuitry gets energized to start
preheating. The glow indicator is displayed.
To check for any lamp breakage, however, the lamp
lights up and stays on for about 1 second.
A [START]
Move the pilot control lock lever to the "LOCKED"
position. Turn the key from the "RUN" position another
click to the "START" position. The starter motor is then
activated to get the engine started.
Release your hand from the key, and the key returns
itself to the "RUN" position. In other words, once the
engine has started, be sure to free the key.
(1) Starter switch
(A) STOP
(B) RUN
(C) START
A If the key is repositioned from "RUN" to "STOP" but not
pulled out, the message "pull out key" appears
onscreen.
A With the key off and pulled out, nothing appears
onscreen.
[Status with the key off but not pulled out]
CHECKS BEFORE START
BDisplay Selector Switch
BLCD Display for Normal Operation
Press the display selector switch while the engine is
running. The LCD meter display will change from one
indication mode to the other.
Change the two-mode display according to your jobs.
C Fuel gauge
7
To avoid personal injury:
A Before adding fuel, be sure to stop the engine.
A Be sure to keep open flame away from the
machine. Otherwise a fire may result.
With the starter key at the "RUN" position, the fuel
remaining in the fuel tank is indicated in the block.
(1) Display selector switch
C AUX port in use
(1) Fuel gauge
If the fuel runs short, open the cap and refuel the tank.
(1) Display selector switch
A Even with the starter key not yet inserted, press the
electronic meter's user setting switch or the display
selector switch, and the LCD display shows the hour
meter, fuel gauge, water temperature gauge and clock
for 10 seconds.
(1) Fuel cap
(2) Fuel level audible indication switch
A If the fuel gauge indicator is near the "E" or the
"FUEL" message appears, add fuel as soon as
possible. If the indicator is near "E" and the machine
is operated on a slope, the engine may run out of fuel.
A To open the fuel cap, keep the key inserted.
8
CHECKS BEFORE START
C Fuel level audible indication switch (when
refueling)
1. With the starter key at the "OFF" position, press the
fuel level audible indication switch, and the fuel level
can be checked by the buzzer.
2. Start refueling the machine. The buzzer beeping
intervals vary according to how much fuel is poured
into the tank. As the fuel tank is filled up, the buzzer
will sound almost continuously.
3. While refueling the machine, listen to the buzzer to
know how much the fuel tank is filled.
4. If fuel is poured too slowly, the buzzer will stop
beeping. When resumed normally, the buzzer will start
beeping.
5. To stop refueling halfway (before filling up), press the
fuel level audible indication switch or simply stop
refueling for a while. The buzzer will stop sounding.
C Coolant Temperature Gauge
To avoid personal injury:
A Do not open the radiator cap during or just after
operation. Hot coolant may gush out and scald
you. Wait for the coolant to cool down before
opening the cap.
With the starter key at the "RUN" position, the coolant
temperature is indicated.
(1) Coolant temperature gauge
If the coolant temperature indicator is near "H", take the
steps below.
Depending on the coolant temperature, the warning
message "Water temp. is rising" or "Overheat Engine
to idle for cooling" appears. In either case too, follow the
same procedure below.
1. Discontinue the job.
2. Reduce engine rpm's to idle and keep it at idle for 5
minutes.
3. Stop the engine and check the following points (1)-(4).
(1) Low coolant level or leak
(2) Fan belt tension
(3) Mud or dust deposits on radiator
(4) Hydraulic oil leak
CHECKS BEFORE START
C Overheat warning
1. If the coolant temperature becomes too high, the
message "Water temp. is Rising" appears onscreen
for a certain period of time. The LCD display then gets
back to normal, but the coolant temperature sensor
marker " " starts blinking at 1-second intervals.
C Hour-meter
Indicates the total operating hours of the machine.
How the indicator works
A The meter advances one hour after an hour of
operation regardless of the engine rpm.
(1) Hour-meter
C Engine tachometer
(1) Coolant temperature sensor marker
Indicates the current rpm of the engine.
2. The overheat warning appears onscreen. Also the
following message shows up on the LCD display, and
the engine automatically starts idling. (Acceleration is
not operative.)
If the above message appears, take corrective measures,
referring to the "Precautions in case of Overheat"
section.
(1) Engine tachometer
A When the coolant temperature has dropped,
acceleration can be automatically enabled.
9
10
CHECKS BEFORE START
C Glow indicator
The indicator is displayed when the starter key is turned
to the "RUN" position but the engine requires preheating.
Wait until the indicator goes out, and then start the engine.
BLCD Display for Warning
C Remaining fuel warning
When the fuel level is very low, the
lamp (yellow) starts
flashing and the following message appears in the
display.
(1) Glow indicator
BWarning Lamp
The warning lamp is used to indicate broken wire, shortcircuit, fuel shortage and other problems.
The warning lamp starts flashing in red if any problem
occurs. If the system senses a in warning signal, the
warning lamp starts flashing in yellow.
A If the warning illuminates, do not just look at the meter;
carry out the appropriate inspection and correction
accordingly.
(See "REGULAR CHECKS AND MAINTENANCE
WORK" section)
A After a short period of time, the display comes back to
normal.
A After a short period of time, the message shows up
again.
A Even while in the normal display mode, the warning
lamp keeps on blinking.
A To see what warning is being given out, press the
display selector switch. The current warning can then
be identified.
C Battery charge warning
If the starter key is turned to the "RUN" position without
starting the engine, and the charging lamp stays off, the
charging system has failed. If such occurs, immediately
contact your local dealer for repair.
A If any warnings and problems are displayed, an alarm
buzzer will beep. (See "LIST OF SCREENS" section
for detail.)
A See your KUBOTA dealer from details concerning
care and maintenance.
(1) Charging lamp
(1) Warning lamp (red, yellow)
CHECKS BEFORE START
C Engine oil pressure low warning
11
Information
When the engine oil pressure drops too low, the
lamp
(red) starts flashing and the following message appears in
the display.
Immediately stop the engine and check the engine oil
level.
(1) Information switch
(1) Oil lamp
A If the starter key is turned to the "RUN" position
without running the engine and the oil lamp stays off,
then the hydraulic system may have failed.
If such occurs, immediately contact your local dealer
for repair.
A "
mark" may appear together with a warning
message.
If such occurs, the details can be checked by pressing the
information switch.
When contacting your local dealer for repair, notify them
of the information provided.
Example;
Press the information switch, and a detail such as shown
below appears.
C Various error warnings
If any components are detected to be in trouble, the
following message appears onscreen.
(See "LIST OF SCREENS" section)
A Press the information switch again, and the display
goes back to the previous screen.
12
CHECKS BEFORE START
User settings
A If you have any question, consult your KUBOTA
Dealer.
3. Press the switch 2 twice to move the cursor into
position. Then press the save switch 5 to make the
following screen appear. By pressing the switch 4, the
year, month, day, hour and minute will be selected in
this order. Select an item to readjust.
BSetting the Clock
1. Turn the starter key to the "RUN" position.
(1) Switch 5
(2) Switch 2
(1) Starter switch
(A) STOP
(B) RUN
(C) START
2. Press the switch 1 to make the log record/periodic
check/clock set screen appear.
(1) Switch 1
(2) Switch 5
(3) Cursor
(4) Switch 2 and 3
(5) Switch 4
(3) Switch 3
(4) Switch 4
Press the switch (Switch 2) and the numeric setting will
be smaller.
Press the switch (Switch 3) and the numeric setting will
be larger.
Hold down the or switch, and the numeric setting will
change quickly.
Press the switch (Switch 2), and the year, month, day,
hour and minute will be selected in this order.
CHECKS BEFORE START
13
4. Save the new setting with the
switch (Switch 5).
Press this switch 5 again to set the clock.
(1) Switch 5
(1) Switch 5
[Status after setting the clock]
BReordering the year/month/day and
Changing the AM/PM System to the 24hour One
1. On the user
Settings".
setting
screen,
select
(1) Switch 5
A Be careful not to accidentally press the switch 5 on
the clock setting screen. Otherwise the seconds
will be set to "00" and the clock will show the
wrong time.
A When the user setting switch (Switch 1) is pressed on
the clock setting screen, the clock is not readjusted
and returns to the pervious menu screen.
A If the clock is interrupted, for example when the battery
is disconnected, the following message appears
onscreen. Press the switch 5 to set the clock again.
2. Select "Calendar/Clock Set" menu screen.
"Various
14
CHECKS BEFORE START
3. Press the switch 5 and the following detailed screen
shows up.
(1) Switch 2 and 3
(2) Switch 4
(3) Switch 5
2. Press the switch 1 to make the menu appear
onscreen.
3. Press the switch 2 and 3 to select the log record. Fix
this choice with the
switch (Switch 5).
(A) Year/month/day display
(B) Clock display
(1) Using the switch 2 and 3, move up and down the
items. The year/month/day on Side (A) will be
reordered.
(2) Using the switch 4, move the cursor to Side (B).
Select the "AM/PM" system or the "24-hour"
system.
(3) Press the switch 5, and the new settings will be
made.
If the switch 1 is pressed, the previous settings will
remain.
(1) Switch 1
(2) Switch 5
(3) Cursor
(4) Switch 2 and 3
(5) Switch 4
4. Press the switch 5 to make the calendar appear
onscreen.
Press the switch 2, and the log records (machine's
operating days) for the last month and the month
before last (90 days ago) can be reviewed.
The highlighted days indicate when the machine was
operated.
A Consult your KUBOTA dealer for details.
BLog Record
The log record helps you check the last 3-month operating
record of the machine. Take the following steps.
1. Set the starter key to the "RUN" position.
(1) Switch 5
(2) Switch 2 and 3
A Some days may appear marked with [-] when the log
record is unknown because of a new setting of the
clock, a disconnection of the battery or other factors.
(1) Starter switch
(A) "STOP"
(B) "RUN"
(C) "START"
CHECKS BEFORE START
BPeriodic Check
The following message appears on the LCD display 10
hours before a periodic check.
BIf All the Check Points are not Displayed at
a Glance on a Single Screen
1. Press the switch 4.
2. Each time the switch 2 or 3 is pressed, the check
points scrolled up or down.
Press the switch 4 to see the check results.
(1) Switch 4
(2) Switch 2
(1) Switch 4
Do the following servicing listed below.
A When the servicing has been completed, turn the key
switch ON and OFF 10 times or more and the check
screen automatically disappears.
A When the periodic check interval has passed, the
message "Periodic Check Passed" shows up.
Immediately perform the specified servicing.
A The periodic check screen can also be preset to be
made to disappear manually only. To do this, it is
necessary to select "Periodic Check" on the user
setting menu.
For make this setting, contact your local dealer.
15
(3) Switch 3
16
CHECKS BEFORE START
C Service hour meter
When the hour meter reaches the hours circled in the maintenance list below, a message appears. The message shows
up as follows.
No.
Check points
1
Engine oil (CF-4)
2
Hydraulic oil
3
Air filter
element
Measures
change
Outer
element
Inner
element
Hour meter indicator
50
100
250
300
500
550
750
800
1000
Intervals
every 250 hrs
every 1000 hrs
every 1000 hrs
replace
every 1000 hrs
4
Fuel filter
every 500 hrs
5
Engine oil filter
every 250 hrs
6
Drive unit oil
7
Hydraulic return filter
element
change
every 500 hrs
every 1000 hrs
replace
8
Hydraulic suction
filter element
9
Pilot filter
replace
every 1000 hrs
10
Idlor, Track roller,
grease
-
every 2000 hrs
11
Breather filter
replace
every 500 hrs
every 1000 hrs
First operation
CHECKS BEFORE START
17
BWhen the Check-up is Completed
When the check-up is completed, perform the following
procedure to make the Periodic Check disappear from the
screen.
1. The message below appears onscreen to prompt the
completion of the check-up.
2. To take a look at the check points, press the
information switch. The check points appear
onscreen.
3. When the check-up has been completed, press the
switch 5. If not, press the switch 1 to go back to the
previous screen.
BWorking Light Switch
When the starter switch is in position "RUN", the light(s)
will be switched on by pressing the switch.
(1) Working light switch
C Night operation
(1) Switch 4
(2) Switch 1
(3) Switch 5
BHorn Switch
To avoid personal injury:
A When the working light and CAB light alone do
not provide sufficient visibility, prepare
additional stationary artificial lighting and
observe safety rules for night work.
BAUX Port Flow Rate Limit Switch
It is possible to freely readjust the actuator's maximum
flow rate in the AUX operating mode.
(See "AUX PORT OPERATION" section for detail.)
(1) Horn switch
(1) AUX port flow rate limit switch
18
CHECKS BEFORE START
BAuto Idle Switch
BTravel Speed Switch
The switch is used to enable and disable the Auto Idle
control.
Travel speed will increase when this switch is pushed
down.
Switching the dual travel speed:
1. Press the travel speed switch. The buzzer beeps twice
and the travel speed changes from low to high. The
symbol lights up.
2. Press the travel speed switch again, and the buzzer
beeps once and the travel speed changes from high
speed to low. The
symbol goes out.
A Enable:
Press the Auto Idle switch. When the
Auto Idle control is on, the Auto Idle lamp
stays on.
A Disable:
Press the Auto Idle switch once again.
Now the Auto Idle control is deactivated
(The Auto Idle lamp goes out.)
(1) Auto idle switch
(2) Auto idle lamp
BThrottle Potentiometer
1. Sit down on the operator's seat and turn the throttle
potentiometer clockwise (toward the high speed), and
the engine revs up.
2. To stop the engine, turn the throttle potentiometer fully
toward the low speed and keep the engine at the idling
speed. Then set the starter key to the "STOP"
position.
(1) Travel speed switch
(2) Speed indicator light
A When activating the travel speed switch, it must be
pushed down completely.
A Each time the travel speed switch is pressed, the
travel speed is switched between low and high.
(1) Throttle potentiometer
CHECKS BEFORE START
A The travel speed automatically changes into first
speed (low speed) when the drive resistance
increases while traveling second speed (high speed).
Thereafter, when the resistance decreases, it returns
to second speed.
A If the tracks are clogged with sand or gravel while
working on soft ground, lift up the track with the help of
the boom, arm and bucket and dozer blade, and let the
track rotate to remove the sand and gravel.
19
CAB TYPE MACHINES
BWiper/Washer Switch
To engage the wiper, turn on the switch for the wiper when
the starter key is in the "RUN" position. A further push on
the switch will activate the washer system. Even when the
wiper switch is in the "OFF" position, the washer switch
functions if it is pressed.
A Do not activate the washer switch if the tank for the
cleaning fluid is empty; the pump can be damaged.
A Do not activate the wiper switch if the window is dry. In
this case, make sure that cleaning fluid is applied to
the pane before activating the wiper.
A In frosty conditions, make sure that the wiper blade is
not frozen to the glass before switching-on. The motor
can be damaged if the wiper system is used under
such conditions.
(A) "Rotate to remove sand
and gravel"
A Do not push the dozer control lever into the float
position as this will cause the machine to
suddenly drop.
To avoid serious injury or death:
A Do not work under the machine in this
condition.
(1) Wiper switch
BInterior Lamp
To turn on the interior lamp, set the interior lamp switch to
the "ON" positions.
(1) Interior lamp
(2) Interior lamp switch
(A) "ON"
(B) "OFF"
20
CHECKS BEFORE START
BCab Light Switch
BOpening/Closing of CAB Door
To turn on the cab light, set the starter switch to the "RUN"
position and then the cab light switch to the "ON" position,
respectively.
1. Unlock the CAB door and pull the knob. Open the CAB
door fully until fixed into place.
2. To close the CAB door, push the release lever down
and close the door.
(1) Cab light switch
(1) Door knob (outside)
BHeater Switch
Turn the starter switch to the "RUN" position and turn the
heater switch clockwise, the heater fan will be activated
and the cabin will start to warm up. The heater has three
position.
(1) Release lever
(2) Door knob (inside)
3. When leaving the excavator, always lock the door.
(1) Heater switch
(2) Temperature control dial
A During summer, turn the heater valve clockwise to
close the valve.
CHECKS BEFORE START
BOpening/Closing of Front CAB Window
To avoid personal injury:
A Keep hands and feet away from the area
between front window and CAB frame.
Otherwise the operator risks serious pinching
or crushing injuries.
A Other persons should stay clear when opening
the window.
To open and close the front window, take the steps below.
1. Push the lock levers beside grip.
21
BOpening/Closing of Side CAB Window
1. Pull the grip to release the lock and pull side window
open to the rear or to the front.
2. To close the side window, slide it forward or backward
until the lock snaps in at the window frame.
(1) Grip
BEmergency Hammer
(1) Grip
(2) Lock lever
2. Hold the grips tightly with both hands. Pull the grip
slightly upward and toward yourself to let the
windshield slide inward.
3. Pull the windshield all the way to the lock at the back
of CAB.
4. To close the window, take the reverse steps 3, 2 and 1.
To avoid personal injury:
A When breaking the window pane, close your
eyes and cover them with an arm.
The emergency hammer is for breaking a window pane in
order to quick escape from the cab, should the window not
open.
(1) Emergency hammer
22
CHECKS BEFORE START
AIR CONDITIONER
Position the inlet selector lever to the desired position.
BAir Flow
Air in the CAB and fresh air introduced into the CAB flow
as shown in the figure. Adjust the five air outlet ports to
obtain the desired condition.
(1) Inlet selector lever (A) "FRESH AIR INLET" position
(B) "INNER AIR RECIRCULATION" position
(A) "FRONT WINDOW"
(B) "CHEST AREA"
(C) "FOOT AREA"
(D) "SIDE WINDOW"
(E) "BACKWARD"
(C) "FRESH AIR INLET"
A Do not allow water to enter the fresh air port while
washing the excavator.
CHECKS BEFORE START
BAir Control Vent
C Front air outlet
The front air outlets can be independently adjusted as
required. To defrost the windshield, rotate the outlets
toward the windshield.
23
BOperation
C Heating
1. Adjust the blower (1/2/3) switch and the temperature
control dial to achieve the desired temperature level.
C Dehumidifying-heating
1. Press and turn on the air-conditioner switch.
2. Turn on the blower (1/2/3) switch.
3. Adjust the temperature control dial to the "COOL" or
an intermediate position to achieve the desired
temperature level.
A Be sure to close the door while the air conditioner is
ON otherwise, you may overload the compressor.
Cooling
Press and turn on the air-conditioner switch.
Turn on the blower (1/2/3) switch.
Adjust the temperature control dial to the "COOL" or
an intermediate position to achieve the desired
temperature level.
C Defrosting or demisting
To defrost or demist the windshield, take the following
steps.
1. Open the front air outlet and direct it to the windshield.
2. Set the blower switch and the temperature control dial
to the "3" and "WARM" (leftmost) positions,
respectively.
C
1.
2.
3.
(1) Front air outlet
(A) "FRONT WINDOW"
(B) "CLOSED"
(C) "FOOT AREA"
BControl Panel
HANDLING THE SAFETY DEVICES
BPilot Control Lock Lever
A When the excavator is not used or left unattended,
be sure to place the pilot control lock lever in
position "Locked".
The pilot control lock lever is located on the left side.
(1) Air conditioner switch
(2) Indicator light
(3) Temperature control dial
(4) Blower switch
C Air Conditioner Switch and Indicator Light
Push this switch to activate the air conditioner. An
indicator light will light up when the switch is set to "ON".
Push switch again to turn air conditioner off, the indicator
light will go off.
C Temperature Control Dial
Set this dial at the desired position to obtain the desired
air temperature. Turn the dial to the right to obtain cooler
air. Turn it to the left to obtain warmer air.
C Blower Switch
Air volume can be changed in three steps. At the "3"
position, the largest air volume is obtained.
(1) Pilot control lock lever
(A) "Unlock"
(B) "Locked"
24
OPERATION OF THE ENGINE
OPERATION OF THE ENGINE
To avoid personal injury:
A Read "SAFE OPERATION" at the beginning of
this operator's manual.
A Obey the danger, warning and caution labels
on the excavator.
A To avoid the danger of exhaust fume
poisoning, do not operate the machine in a
closed building without proper ventilation.
A Always start the engine from the operator's
seat. Do not start the engine while standing
next to the excavator. Before starting the
engine, sound the horn to get the attention of
persons standing nearby.
Start the engine in the following manner:
1. Before starting the engine, make sure that all control
levers are in the neutral positions.
(1) Attachment control lever (left)
(2) Drive lever (left)
(3) Drive lever (right)
(4) Attachment control lever (right)
(5) Throttle potentiometer
2. Pull the lock lever all the way back. (lock position)
3. Put the throttle potentiometer in the middle between
"
" and "
" symbols. The switch for Auto Idle
control is in the OFF position.
(See "AUTO IDLE (AI) OPERATION" in the Excavator
operation.)
(1) Horn switch
A Do not use starting fluid or ether.
A In order not to overload the battery and starter, avoid
engaging the starter for more than 10 sec.
A If the engine does not start in 10 sec., please wait 20
sec. or more, before attempting to restart.
STARTING THE ENGINE
To avoid personal injury:
A The operator should not depend solely on the
warning lamps, but should always conduct the
routine checks (see "MAINTENANCE").
(1) Throttle potentiometer
(2) Switch for Auto Idle control
OPERATION OF THE ENGINE
4. Set the starter key to the "RUN" position. Hold the key
at this position until the " " mark on the display panel
disappears.
25
A If you keep the pilot control lock lever at "UNLOCK"
and try to start the engine, "Up Lever Lock" appears
on the meter panel and the engine cannot be started.
Before staring the engine, make sure the pilot control
lock lever is set at the "LOCK" position.
A When the engine starts, the meter may momentarily
turn off and a beep may sound. This is not a problem.
STARTING THE ENGINE UNDER COLD
CONDITIONS
(1) Starter switch
(A) "STOP"
(B) "RUN"
(C) "START"
5. Now make sure the "
" and "
" marks appear
onscreen. If not, the system has malfunctioned.
Contact your local dealer for repairs.
6. Turn the key to the position "START" and release
after the engine has started.
7. Check if all warning lamps have gone out. Should a
warning lamp still be lit up, stop the engine then
remove the key and check for the cause.
A The starter motor draws a large current. Avoid running
it longer than 10 seconds continuously.
If the engine fails to start within 10 seconds, set the
key to the "STOP" position, wait for 20 seconds or
longer, and repeat the above steps 5 thru 7.
A If the battery is dead and must be connected to
another battery with jumper cable, be sure to use a
12V battery. Never use a 24V batteries.
To avoid personal injury:
A Make sure that the lock lever is in the lock
position during warm up.
Start the engine in the following manner;
1. Make sure the auto idle switch is at the "OFF" position
(lamp off).
2. Pull the lock lever all the way back. (Lock position)
3. Insert the starter key into the starter switch.
4. Turn the throttle potentiometer toward "
" (high
speed) position.
5. Set the starter key to the "RUN" position. Hold the key
at this position until the "
" mark on the display
panel disappears.
6. Turn the starter key to the "START" position.
7. Once the engine starts, release your hand from the
key. The key will return back to the "RUN" position.
8. If the engine fails to start, set the starter key to the
"STOP" position, and repeat the above steps 5 thru 7.
A Let the engine warm up after start-up for approx. 10
minutes under no load conditions. If the hydraulic fluid
temperature is too low, the operation will be affected.
Do not operate the excavator under full load until the
engine has sufficiently warmed up.
26
OPERATION OF THE ENGINE
STARTING WITH AN AUXILIARY BATTERY
12. Remove the cloth and replace the vent caps.
To avoid personal injury:
A Battery gases can explode.
Do not smoke and keep sparks and flames
away.
A Do not start the engine with an auxiliary battery
if excavator battery is frozen.
A Do not connect the black jumper cable to the
negative (-) terminal of the excavator battery.
BObserve Following Guidelines when
Starting with an Auxiliary Battery
1. Bring the helping machine with the same battery
voltage as near as possible to the excavator.
THE MACHINES MUST NOT COME IN CONTACT
WITH EACH OTHER.
2. Bring the levers and pedal of both vehicles in the
neutral position and put the lock lever in the "Lock"
position.
3. Wear eye protection and rubber gloves.
4. Open the side cover. (See "Opening / closing of the
Side Cover" in "MAINTENANCE" section.)
5. Ensure the vent caps are securely in place (if
equipped).
6. Cover the battery opening with a cloth. Make sure that
the cloth does not touch the battery terminals.
7. Connect the terminal of the red jumper cable with the
plus (+) terminal of the low battery and connect the
other end of the cable to the plus (+) terminal of the
auxiliary battery.
8. Connect the black negative cable to the minus (-)
terminal of the auxiliary battery.
9. Connect the other end of the black cable (coming from
the auxiliary battery) to the excavator frame as far
away as possible from the low battery.
10. Start the engine of the helping machine and let it run
for a while. Start the excavator with the low battery.
11. Disconnect the jumper cables in the reverse sequence
(Steps 8, 7, 6).
(1) Lay a damp rag over the vent caps
(2) Low battery
(3) Put a cloth over the battery openings
(4) Jumper cables
(5) Auxiliary battery
A This excavator has a negative (-) ground 12 Volt
starting system.
A Use only the same voltage when using an auxiliary
battery.
A Using a higher voltage will cause serious damage to
the electrical system. When using an auxiliary battery,
only the compatible (same) voltage is permissible.
OPERATION OF THE ENGINE
CHECK POINTS AFTER STARTING THE
ENGINE
After starting the engine, but before starting operation,
check the following points:
1. Put the throttle potentiometer in the middle between
"
" and "
" symbols and let the engine idle for
approx. five minutes. This allows the engine lubricant
to warm up and penetrate every part of the engine.
2. Once the engine has warmed up, check:
A the warning lamp "Engine oil pressure" has gone
out.
A the warning lamp "Battery charge" goes out when
engine speed is increased.
A the color of the exhaust is normal and no abnormal
noises or vibrations are heard or felt.
A no fluid is leaking from pipes or hoses.
27
BEngine Stop Button
To avoid personal injury:
A Keep hands away from rotating parts.
A Be sure to return the stop button to former position
after the engine stops.
The engine stops when the starter key is turned off. If the
engine does not stop, pull the stop button to stop the
engine.
C Should any following conditions occur, stop the
engine immediately.
A The engine rpm's increases or decreases suddenly.
A Sudden abnormal noises are heard.
A Exhaust is black.
A Warning lamp for engine oil lights up during operation.
A In these cases, the excavator must be checked and
serviced by your local the KUBOTA dealer.
STOPPING THE ENGINE
To avoid personal injury or death:
A Do not keep the bucket or dozer in an elevated
position, as a person could accidentally touch
the levers and cause serious accidents.
1.
Place the bucket and dozer on the
ground.
2.
After slowing the engine to idle, turn
the key to "STOP".
3.
Remove the key.
4.
Pull the lock lever to "LOCK" position.
(1) Stop button
(2) Starter key
BPrecautions in case of Overheat
To avoid personal injury:
A Do not open the radiator cap during operation
or just after shut-down. Otherwise, steam or
very hot coolant may gush out, getting you
scalded. Make sure the radiator has cooled
down enough before opening its cap.
If by any chance the coolant temperature rises close to or
above the boiling point ("H" on the water temperature
gauge) (overheat condition), take the following steps.
1. Stop operating the machine.
(Relieve the engine of any load.)
2. Do not shut off the engine suddenly. Before shutting
off the engine, keep it idling under no load for about 5
minutes.
3. Stay away from the engine or overflow for 10 minutes
or until the steam overflow stops.
4. Be sure that there is no danger of getting scalded.
Pinpoint and remove the cause of overheat, referring
to the "TROUBLESHOOTING" section. Once the
issue is resolved, the engine may be restarted.
28
EXCAVATOR OPERATION
EXCAVATOR OPERATION
RUNNING-IN OF THE NEW EXCAVATOR
The operation and care of the new excavator influences
its life span. Your new excavator has been carefully
checked and tested before leaving the factory. In spite of
this, all movable components must run-in during the first
50 work hours. Do not work with full rpm's and full loads
during this period. It is very important to run-in your
excavator properly in order to achieve its full performance
and longevity. During the running-in, the following points
should be adhered to in all cases.
BAdjusting the Operator's Seat
To avoid personal injury:
A Make sure that the seat is completely secured
after each adjustment.
BDo not Work with Full Engine Rpm's or
Full Loads during the First 50 Working
Hours
A Let the engine warm up sufficiently in the cold season.
A Do not let the engine rev-up more than necessary.
BOil Change in the Run-in Stage
The lubrication oil plays a specific and important role
during the run-in phase of the excavator. The numerous
movable parts are not yet run-in, so many fine metal
particles are generated, which can cause damage and
shorten the life of many components. Pay attention to the
oil-change intervals and complete them sooner than later.
See "REGULAR CHECKS AND MAINTENANCE WORK"
section for more details on the oil-change intervals.
(1) Backrest tilt adjust lever
(2) Travel adjust lever
(3) Weight adjust lever
(A) "UNLOCK"
(B) "UNLOCK"
(C) "TO INCREASE TENSION"
(D) "TO DECREASE TENSION"
C Tilt adjustment
Pull the backrest tilt adjust lever in the direction of [A]
and move the backrest to the desired angle.
C Travel adjustment
Pull the travel adjust lever in the direction of [B] and
slide the seat backward or forward, as required. The
seat will lock in position when the lever is released.
C Weight adjustment
Turn the weight adjust lever to achieve the optimum
suspension setting.
C Height adjustment
Lift the seat to the desired height of the three available
positions. Adjust the seat to the desired position after
lifting the seat to the highest position in the case of
lowering the seat.
EXCAVATOR OPERATION
BSeat Belt
To avoid personal injury or death:
A Always use the seat belt with a ROPS/FOPS
protection structure. Adjust the seat to the
optimal position and buckle up.
29
BPilot Control Lock Lever
To avoid personal injury:
A To avoid injuries, check safety aspects all
around the excavator.
A If the pilot control lock lever is pulled down, the engine
will fail to start.
Don't attempt to start the machine with the Pilot Control
Lock Lever in the down position (A), if attempt is made the
following message appears on the LCD display.
(1) Seat belt
STARTING
To avoid personal injury:
A No persons, other than those who have read
and understand this manual and who are
familiar with the excavator, should be allowed
to use the excavator.
A Do not allow any person other than the
operator to ride on the excavator.
A When operating, keep hands and body inside
of the ROPS/FOPS protective.
A Do not touch the control levers and the pedals
from outside the cab while the engine running.
(1) Pilot control lock lever
(A) "Unlock"
(B) "Locked"
A Always pull pilot control lock lever up to "Locked"
position (B) when you stop the engine or leave the
operating structure.
30
EXCAVATOR OPERATION
DRIVING
A Recommended technique for working on a
slope.
To avoid personal injury or death:
A Before starting the engine, make sure that no
one is near the excavator.
A Before operating the excavator, check the track
direction. (Front idler and dozer blade to the
front of the excavator).
1. Adjust the engine speed from idling to an intermediate
speed.
2. Unlock the pilot control lock lever and pull in the bucket
and hold the bucket about 20 to 40 cm above the
ground.
(A) "Front of the excavator"
A Use extra caution when traveling across a
slope or working sideways on a slope.
(1) Pilot control lock lever
(A) "Unlock"
(B) "Locked"
(A) 20 to 40 cm
EXCAVATOR OPERATION
3. Activate the dozer control lever to raise the dozer.
31
TURNS
To avoid personal injury:
A Do not change direction on steep slopes, or the
excavator could tip over.
A Before changing direction, beware of people in
the work area.
BPivot Turn
A Movement as illustrated is done with the dozer blade
in front of the operator.
(1) Dozer control lever
(2) Dozer
(A) "Raise"
(B) "Lower"
BDrive Levers(Right,Left)
C Change of Direction while Travelling
1. While travelling forward, bring the left drive lever into
the neutral position;
the excavator will turn in the direction of the arrow of
the illustration below.
To avoid personal injury or death:
A When driving the excavator keep the dozer
blade in front. To move the excavator forward,
move the drive levers to (A) and to move in
reverse, move the drive levers to (B) with dozer
blade in front. If the dozer blade is behind
operator station, then the controls are
reversed, moving the excavator forward will
require (B) and moving the excavator
backwards will require (A), but this is not
recommended.
Pushing the drive levers forward, moves the excavator
forwards, and vice-versa. The front of the excavator is the
side where the dozer is located; the drive sprocket is in the
rear of the excavator.
(1) Drive lever (left)
(2) Drive lever (right)
(A) "Forward"
(B) "Backward"
(C) "Straight"
(A) "Travelling forward"
(N) "Neutral position"
2. While travelling backward, bring the left drive lever into
the neutral position;
the excavator will turn in the direction of the arrow of
the illustration below.
(B) "Travelling backward"
(N) "Neutral position"
32
EXCAVATOR OPERATION
C Change of Direction while Stationary
1. Push the left drive lever forward;
the excavator will turn in the direction of the arrow of
the illustration below.
2. Pull the left drive lever backward;
the excavator will turn in the direction of the arrow of
the illustration below.
BSpin Turn
When both drive levers are activated in the opposite
directions, both tracks will rotate with the same speed but
in opposite directions. The center of rotation is the center
of the excavator.
(A) "Left spin turn"
(A) "Right spin turn"
EXCAVATOR OPERATION
UP AND DOWNHILL DRIVING
To avoid personal injury:
A When travelling up or down a slope, use extra
caution and follow the instructions below.
While traveling uphill, keep the lower edge of the bucket
approx. 20 to 40cm above the ground. Although the
KUBOTA excavator will not slip easily because of the
tracks, it is safer to let the bucket slide over the ground
while traveling downhill. Always choose slow speed for
uphill and downhill traveling.
33
PARKING ON A SLOPE
To avoid personal injury or death:
A When the excavator is parked or left
unattended on a slope, be sure to put the
bucket on the ground and place all control
levers in neutral position, then brace the tracks
with chocks.
[UPHILL TRAVELING]
(1) Chock
OPERATION OF THE DOZER
1. To raise the dozer, pull back the control lever. To lower
the dozer, push the control lever forward.
(A) 20 to 40 cm
To float the dozer, push the control lever more forward
to the locked position.
[DOWNHILL TRAVELING]
(1) Dozer control lever
(2) Dozer
(A) "Raise"
(B) "Lower"
(C) "Float" (Locked position)
2. While undertaking earth moving work, control both
drive levers with the left hand and the dozer control
lever with the right hand.
34
EXCAVATOR OPERATION
TWO PATTERN SELECTION
SYSTEM(TPSS)
To avoid personal injury:
A Study control lever pattern A and pattern B.
Then choose the one which is most familiar.
A Position the pattern selector lever (located on
the right side of operator's seat) in either the
lower position (Pattern A) or the upper position
(Pattern B).
A Engage the lever lock to prevent accidental
pattern change.
A Familiarize yourself with the pattern selected
by operating slowly.
BPattern Change
1. Disengage the lever lock to open the cover and
position the pattern selector lever to the desired
position.
2. Close the cover and engage the lever lock.
(1) Pattern selector lever
(Two Pattern Selection System:TPSS)
(2) Lever lock
(A) "Pattern A"
(B) "Pattern B"
Lever Position
Attachment
Control Lever
(Left)
Attachment
Control Lever
(Right)
Pattern A
A
B
C
D
Pattern B
Boom down
Boom up
Swing left
Swing right
Arm up
Arm crowd
Swing left
Swing right
Arm up
Arm crowd
Bucket crowd
Bucket dump
Boom down
Boom up
Bucket crowd
Bucket dump
EXCAVATOR OPERATION
OPERATION OF THE BOOM
To raise the boom, pull the attachment control lever back.
The boom is equipped with a cushion cylinder which helps
prevent excavated material in the bucket from falling out.
At low hydraulic oil temperature, (e.g. after starting the
engine in cold weather) the cushioning function will be
effected for a short period of time (approx. 3 to 5
seconds). This condition results from the viscosity of the
hydraulic oil and is not a sign of malfunction.
The cushion cylinder will operate normally as the oil
warms up.
To lower the boom, push the attachment control lever
forward.
A When lowering the boom, make sure that it does not
hit the dozer and that the bucket teeth do not touch the
dozer.
35
OPERATION OF THE ARM
Pull back the attachment control lever and the arm will be
pulled in. To move the arm out, push the control lever
towards the front.
A When pulling in the arm, the movement may stop for a
short moment when the arm is in its vertical position.
This is caused by the combined load of the arm and
bucket moving the cylinder piston away from the
hydraulic flow causing a delay in the cylinder action,
until the flow catches up with cylinder piston. This is a
characteristic of the hydraulic system and is not a sign
of malfunction.
36
EXCAVATOR OPERATION
OPERATION OF THE BUCKET
To dig using the bucket, move the right attachment control
lever from the neutral position, left. Moving the control
lever right, moves the bucket outwards and empties its
contents.
BUnit Swing Operation
1. Move the control lever to the left and the upper
structure will turn to the left.
2. Move the control lever to the right and the upper
structure will turn to the right.
BBoom Swing Operation
1. Flip the pedal lock up to unlock the pedal.
2. Step on the left side of the pedal to swing the boom to
the left.
3. Step on the right side of the pedal to swing the boom
to the right.
UNIT SWING AND BOOM SWING
OPERATION
To avoid personal injury:
A When working in groups, always let the others
know what you are going to do before you do it.
A Keep others away from the machine working
area.
A Be sure to lock the boom swing pedal when the
boom swing function is not used.
(1) Boom swing pedal
(2) Pedal lock
A Do not operate the left attachment control lever
abruptly from right to left (or vice versa), because the
inertia may cause high impact loads on the swing gear
and the swing motor, shortening the life of the
excavator.
EXCAVATOR OPERATION
37
AUXILIARY PORT OPERATION
The auxiliary port enable switch is used to operate hydraulic attachment such as hammers.
BSelecting the Action Modes
The AUX port has been factory-set to three action modes. You can select one of them. Up to five action modes can be
preset.
Each time the AUX port enable switch (switch 3) is pressed, the action modes change over one after another. And the icon
and action mode number on the screen change accordingly.
A When turning the starter key to the "RUN" position, the action mode will return to the last action mode used.
38
EXCAVATOR OPERATION
C Checking the settings of each action mode
When an action mode is selected and the " " mark
appears at the lower right of the icon, the flow volume
setting gets displayed by pressing the switch 4.
BAUX Port Handling Procedure
(1) Icon
(2) Information mark
(3) Information switch (Switch 4)
(1) Starter switch
1. Turn the starter key to the "RUN" position.
Let the engine warm up after start-up for approx. 10
minutes under no load conditions.
[Display in AUX 1 and 2 modes]
(A) "STOP"
(B) "RUN"
(C) "START"
2. Lower the pilot control lock lever (UNLOCK).
(1) AUX Port 1
(2) AUX Port 2
(3) AUX Port 3
(4) AUX Port 4
(1) Pilot control lever
(A) "Unlock"
(B) "Locked"
EXCAVATOR OPERATION
3. Push the AUX port enable switch (switch 3).
39
4. If the machine is equipped with the AUX 1 port, move
the AUX port knob of the right attachment control lever
to the right to send oil to the AUX port 1.
Move the AUX port knob of the right attachment
control lever to the left to send oil to the AUX port 2.
If the machine is equipped with the AUX 2 port, move
the AUX port knob of the left attachment control lever
to the right to send oil to the AUX port 3.
Move the AUX port knob of the left attachment control
lever to the left to send oil to the AUX port 4.
(1) AUX port enable switch (Switch 3)
A If the pilot control lock lever is at the "LOCKED"
position, the following message appears onscreen.
Down this lever to the "UNLOCKED" position and then
press the AUX port enable switch (switch 3).
(1) Attachment control lever (left)
(2) Attachment control lever (right)
(A) "AUX port 1"
(B) "AUX port 2"
(C) "AUX port 3"
(D) "AUX port 4"
A Proportional control of the AUX port knob allows for
slow-to-fast movement of attachment.
Example; If you move the AUX port knob halfway, the
attachment will move at approximately one-half speed.
40
EXCAVATOR OPERATION
C One way hold
[AUX 1 and 2 modes]
Press the one way hold switch of the right attachment
control lever, and the oil continues to flow through the
AUX port 4. Press this switch again or move the AUX port
knob, and the oil flow is interrupted.
BSetting the Maximum Flow Volume
The AUX port has been factory-set to three action modes
1, 2 and 3. The action modes 4 and 5 can also be preset.
C How to make the settings
1. With the starter key at the "RUN" position, press the
user setting switch (switch 1), and the following display
appears onscreen.
(1) User setting switch (switch 1)
(1) Attachment control lever (right)
(2) Attachment control lever (left)
(3) One way hold switch (right)
(B) "AUX port 2"
2. Press the switch 2 or 3 to select "AUX Flow Ctrl Set",
and then press the switch 5.
A Even if the one way hold switch of the left attachment
control lever is pressed, no function is assigned. In this
case, the following message appears onscreen.
(1) Switch 2 and 3
(2) Switch 5
EXCAVATOR OPERATION
41
3. Each time the switch 5 is pressed, the mode number
changes. Select your desired setting mode number.
5. Each time the switch 2 or 3 is pressed, the icon
changes. Select your desired icons.
(1) Icon
(2) Mode No.
(3) Switch 5
(1) Switch 2
(2) Switch 3
(3) Icon
4. Take the following steps to set the icons.
Each time the switch 4 is pressed, the setting cursor
(arrow mark) shifts position. Move the cursor above
the icon.
C Types of AUX icons
(1) Setting cursor (arrow mark)
(2) Icon
(3) Switch 4
(1) AUX (Standard)
(2) Brush cutter
(3) Rotary grapple
(4) Grapple
(5) Auger
(6) Clamshell
(7) Breaker
(8) Tilt bucket
(9) Blank (disable)
42
EXCAVATOR OPERATION
A There is no relationship between the icons and the
flow control settings. Select icons to suit the images of
attachments to be connected.
A In an action mode with the disable icon preset, such
action mode is skipped even if selected.
6. Set the maximum flow volume for each AUX port.
Press the switch 4 to move the setting cursor (arrow
mark) to the port 2 position of Thumb port at the right.
Take an example of the following settings:
AUX (standard) icon for action mode 1,
Breaker icon for action mode 2,
Disable icon for actions modes 3, 4 and 5.
Each time the AUX port enable switch (switch 3) is
pressed, the display changes from action mode 1,
action mode 2 to normal mode in this order.
[Setting example]
(1) Setting cursor (arrow)
(2) Switch 4
(A) Blank (disable) icon
(1) AUX 1
(2) AUX 2
(A) "AUX port 1"
(B) "AUX port 2"
(C) "AUX port 3"
(D) "AUX port 4"
EXCAVATOR OPERATION
7. Press the switch 2 or 3 to preset the maximum flow
volume.
Set the bar to the highest level, and the flow volume
will be maximized.
Set the bar to the lowest level (no bar displayed), and
there will be no oil flow.
Then press the switch 4 to go to the next port, and
make the settings for all the other ports.
43
8. Go back to Step 3 to make settings for the next action
mode. When all the settings of all the action modes
have been made, press the switch 1 to return to the
normal screen.
(1) Switch 1
C AUX port MAX. Flow volume
(1) Switch 2 (Higher flow volume) (A) "MAX. flow volume"
(2) Switch 3 (Lower flow volume) (B) "Output interrupted"
(3) Switch 4
A Some attachments might not be activated even when
the bar level is still somewhat above the lowest
position. Or even when the bars of ports 1 and 2 (or of
ports 3 and 4) are at the same level, the same speed
might not be achieved. This does not indicate a
machine problem, however. Readjust the bar to the
optimum level according to your attachment manual.
A Suppose that the same attachment is mounted on
another machine. Even if the same flow control setting
is made, the same speed cannot be achieved. Make
an optimum setting on each machine.
AUX 1 port
AUX 2 port
MAX. flow volume
(Theoretical L/min)
75
(20)
37
(9.87)
MAX. pressure
MPa (kgf/cm ) [psi]
17.2
(175)
[2500]
17.2
(175)
[2500]
A When the AUX port is not used for a long period, dirt
particles can settle in the lower part of the AUX port
lines. When the plugs on the AUX port lines are
removed to connect attachments, drain approx. 100 cc
(3.4 oz) of oil before making connections.
44
EXCAVATOR OPERATION
EXCAVATOR OPERATION
HOW TO RELEASE PRESSURE TRAPPED
IN THE HYDRAULIC SYSTEM
1. Lower the attachments and the blade down to the
ground.
2. Turn the key to "STOP" position and shut off the
engine.
3. After stopping the engine, turn the key to "RUN"
position.
4. Set the lock lever to "Unlock" position.
3. Make sure that the flow volume in all the AUX ports is
not minimized.
If the pressure is removed after minimizing the flow
volume in the AUX port, release pressure is not
removed completely and the hose coupler may be
unable to connect and disconnect.
(1) Flow volume in
AUX port display
(1) Lock lever for attachment control
(2) Attachment control lever (left)
45
(A) Flow volume in AUX port
(B) Maximum
(C) Minimum
(A) "Unlock"
(B) "Lock"
5. Move the operating lever to release pressure in the
hydraulic system.
[How to release pressure trapped in the AUX port]
1. Perform the above operations of 1 to 4.
2. Turn "ON" the AUX port enable switch.
(B) Maximum status of flow volume in AUX port
(C) Minimum status of flow volume in AUX port
4. Move the AUX port knob mounted to the operating
lever to the right and left to release pressure in the
AUX port.
(1) AUX port enable switch (Switch 3)
D There are two types of machine, one has the AUX port
knobs mounted to the right and left operating levers,
the other has the AUX port knob mounted to one
operating lever.
Make choice according to the type of machine.
46
EXCAVATOR OPERATION
1-way or 2-way CIRCUIT SELECTION
VALVE OPERATION
A selection valve which selects 1-way or 2-way circuit of
service port has been installed on the hydraulic tank.
1. When equipment which needs a 1-way circuit will be
used, position the arrow, by using the selector lever,
on the axis of the selection valve to the 1-way circuit
position, to reduce the back pressure.
2. When equipment which needs a 2-way circuit will be
used, position the arrow on the axis of the selection
valve to the 2-way circuit position.
A 1-way circuit..... HAMMER etc.
A 2-way circuit..... THUMB, TILT BUCKET,
AUGER, GRAPPLE etc.
To avoid personal injury:
A Stop the engine before removing/changing the
equipment.
A Release pressure in the hydraulic system
before removing/changing the equipment. (See
"HOW TO RELEASE PRESSURE TRAPPED IN
THE HYDRAULIC SYSTEM".)
A Position the selection valve to the correct
position (either 1-way or 2-way circuit
selection) before mounting the equipment.
A Always select the correct valve position before
mounting the equipment (1-way or 2-way
circuit selection) to avoid sudden movement of
the equipment.
A Leaving the selection valve to 1-way circuit selection
and attaching 2-way circuit equipment may cause the
equipment to move (drop) suddenly due to its own
weight, as the tank line remains open, even with the
engine off.
(1) Selection valve
(2) Selector lever
EXCAVATOR OPERATION
AUTO IDLE (AI) OPERATION
1. Throttle Potentiometer
With this potentiometer the operator can adjust the
engine speed when the Auto Idle control is activated.
2. Switch for Auto Idle (AI) Control
With this switch the Auto Idle control is turned on or off.
The Auto Idle control allows the engine speed to drop
to idle speed when the control levers are left in neutral
for longer than four seconds. If the control is activated,
the engine speed rises immediately to the preset rpm.
If the Auto Idle is not activated the throttle
potentiometer can be utilized to control engine speed
in a similar way to a conventional throttle control lever.
(1) Throttle potentiometer
(2) Switch for Auto Idle control
(3) Lamp for Auto Idle control
A It is possible that the Auto Idle may not function until
hydraulic oil warms up in the cold weather. Therefore
it is not recommended that the Auto Idle be activated
until the machine is completely warmed up.
A Before operating the control lever, check the Auto Idle
Indicator Lamp.
A When operating in confined spaces or when loading
onto a vehicle, turn the Auto Idle switch off (Light off).
This is to prevent unwanted engine speed increases
when control levers are activated.
A The Auto Idle control, when selected by a switch,
provides the operator with a way to control engine
speed without moving the Throttle Potentiometer,
simply by not activating any control levers for about
four seconds after stopping work, and then to simply
restore a preset (by potentiometer) engine speed by
activating any control lever to return to work.
A The purpose of the system is to reduce fuel
consumption, noise and operator fatigue.
A When the dozer control lever is locked at the "Float"
position on the angle blade type, the Auto Idle function
is not activated even if any other control lever is set in
the neutral position.
IMPORTANT INFORMATION ON
EXCAVATOR OPERATION
47
A Do not try to crush concrete or boulders using side
swings with the bucket. Also avoid using side sweeps
of the bucket to move earth piles.
A Under all circumstances avoid the following
operations:
A Excavation using the gravitational impact of the
machine.
A Compacting of gravel or soil using the dropping
action of the bucket.
A Excavation using the traveling power of the
machine.
A Do not try to drop or shake off soil adhering to the
bucket in the manner given in the points below. This
can cause damage to the machine.
Adhering soil can be shaken off when the bucket is
being emptied by moving the bucket out to the
maximum stroke of the cylinder. Should this not
suffice, swing out the arm as far as possible and
operate the bucket back and forth.
A Do not hit the dozer with the boom cylinder!
Make sure that the boom cylinder does not hit the
dozer when doing deep excavation. If necessary
swing around so that the dozer is in the back of the
machine.
A Pay attention when pulling in the bucket!
When pulling in the bucket (for driving or
transportation) avoid hitting the dozer.
A Avoid collisions!
When moving the excavator, pay attention that the
dozer does not collide with obstructions such as
boulders, etc.
Such collisions shorten the life of the dozer and the
cylinder substantially.
A Support the machine correctly!
When stabilizing the machine with the dozer, lower the
dozer to engage the full width on the ground.
A If the water or mud level reaches higher than the top of
the tracks, the swivel bearing, swivel motor gear and
ring gear may be exposed to mud, water and other
foreign objects.
The excavator must be properly pressure washed
after each use.
A Thoroughly clean the area around the swivel
bearing, swivel motor gear and ring gear to remove
foreign objects.
A Inspect the swivel motor oil sump (if equipped) for
water contamination. If water is present, refer to
operator's manual for lubricant replacement
procedure.
A Refer to operator's manual for proper swivel
bearing, swivel motor gear and ring gear
lubrication procedures.
A Reinstall any protective covering if removed
earlier.
48
TRANSPORTING THE EXCAVATOR ON A VEHICLE
TRANSPORTING THE EXCAVATOR ON A VEHICLE
B Transporting on a Truck
To avoid serious injury or death:
A No directional changes should be made when
the excavator is on the ramp. Should a change
of direction be necessary, drive off the ramp
completely and make the turn.
A When driving forwards or backwards onto the
vehicle, or when swinging the upper body,
make sure that neither the CAB or the gates of
the vehicle will be damaged.
To avoid personal injury or death:
A After loading the machine on the truck, lower
the bucket and dozer onto the truck bed.
Prepare a platform to load or unload the excavator. Take
following steps when using ramps.
1. Apply the parking brakes of the vehicle, and block the
drive wheels from both sides.
2. Use mounting brackets to secure the ramp properly.
Connect the ramps directly with the bed.
A When the excavator reaches the point between
the ramps and the bed, halt and then move very
slowly until the excavator reaches the
horizontal position.
A Move the excavator onto the vehicle only with
the arm completely pulled in.
A Do not jack up the machine using its boom to
load or unload the excavator from the vehicle.
Doing this is dangerous. Otherwise the CAB of
the vehicle could be damaged when swinging
around the upper body.
A Make sure the ramps are of sufficient capacity
and securely connected to the vehicle to safety
support the machine throughout the loading /
unloading operation.
TRANSPORTING THE EXCAVATOR ON A VEHICLE
49
3. For additional safety, use blocks or supports under the
ramps and the bed.
(1) Chain
(2) Block
4. Completely align the ramps and the tracks and then
drive the excavator slowly up the ramps. After
ensuring that the tracks are completely on the bed,
swing the upper body around to the back of the
vehicle.
5. Lower the dozer onto the bed.
6. Pull in the bucket and arm completely. Then lower the
boom.
7. Stop the engine, release pressure trapped in the
hydraulic system and remove the key.
8. Raise the lock lever.
9. Block the tracks with blocks and tie down the
excavator.
B Towing the machine
To avoid personal injury:
A When towing the excavator or pulling a load
must be less than the strength of the towing
line attached to excavator. Not to be used for
tiedown or lifting the machine.
A Towing is only allowed over a short distance
and at walking speed.
1. Attach the tow bar or towing rope to the hook on the
excavator and to the pulling vehicle. The tow bar
should be mounted at a right angle to the vehicles.
2. The operator must be seated during the recovery
procedure.
3. Drive slowly with the tractive vehicle to avoid abrupt
loads.
(A) Tie down point
(1) Tow line
50
LIFTING OF THE EXCAVATOR
LIFTING OF THE EXCAVATOR
To avoid serious injury or death:
A The correct instructions for safe handling are
described here. Read these instructions
carefully before moving the machine. Make
sure that the operating personnel read the
operator's manual carefully.
B Basics when Lifting with Cables or Straps
1. The lifting and crane operation is to be undertaken
according to the safe operation guidelines described.
2. The equipment used for lifting mentioned in these
instructions are only given as reference, the standards
concerning strength, control and other details are
based on the respective applicable guidelines.
B Safety Aspects when Lifting with Cables or Straps
Abide by the following steps when lifting:
1. Do not lift loads that exceed the maximum load
capacity of the crane.
2. Choose correct equipment suitable to the weight, size
and form of the load.
3. First assess the center of gravity of the load, position
the hook directly over the load and lift the load so that
the center of gravity of the load is as low as possible.
4. The steel cables or straps must be fixed in the middle
of the hook.
5. The load must be lifted vertically from the ground.
6. Do not enter the working area under suspended loads
and do not move the load over people. The load must
only be moved in an area where the balance can be
easily maintained.
(3) Lift the boom and get the bucket and arm in their
crowded position. Next set the pilot control lock
lever to the "LOCKED" position.
(4) With the boom not swinging, set the swing pedal
to the neutral position, place the pedal cover and
stop the engine.
(5) Apply shackles (3200 kg or heavier-duty) through
the openings at both ends of the blade. And apply
shackles (2000 kg or heavier-duty) through the
two openings at the boom top. Pass wire ropes
through these shackles.
[Blade ends]
(1) Shackle
[Boom top]
B Lifting Procedure for the Excavator
To avoid personal injury or death:
A Do not use the hooks on the roof of canopy and
CAB for lifting the excavator.
A When applying the shackles through the
boom's and blade's openings for lifting, be sure
to do two-point lifting for added safety.
A Never lift the machine with the angle blade
placed at an angle. (Angle blade type)
C General guidelines for lifting
1. Lifting position. (see illustration below)
(1) Rotate the upper swivel structure until the blade
positions itself 180-degree opposite the
attachment.
(2) Raise the blade all the way.
(1) Shackle
LIFTING OF THE EXCAVATOR
2. Attaching the steel cables or straps.
(1) Always hook the excavator at three points. (one
on the boom and left and right of the dozer)
(2) Always use a shackle on each lifting hole when
attaching the cables or straps.
(3) Keep the angle between the front and rear cables
or straps within 51 .
(1) Cable or strap
(A) 55 or less
A While lifting, carefully keep the machine well balanced
with its center of gravity in mind.
A Do not lift the machine with the boom swinging or the
upper structure swiveling.
3. Tackle
The weights of the excavators and the recommended
tackle for lifting these loads are mentioned in the
following table. Choose components having enough
strength.
Excavator Weight*
Load / Cable
Minimum Wire Diameter
(Safety factor=6)
CAB
CANOPY
4875 kg
4785 kg
1550 kN (158056 kgf)
16 mm or more
*Excavator Weight: With CAB, steel tracks.
Steel wire: 6X24
4. Lifting
(1) Lift slowly and safely
(2) Do not enter the excavator area when lifting.
51
(3) Lift the excavator horizontally. (Modify cable or
strap connections according to needs)
Maximum strength
for example: (JIS G3525: 2006 or ISO 4344: 2004) "6X24"
Diameter
zinc-plated
not zinc-plated
14 mm
(9/16)
89.7 kN
(9146 kgf)
96.6 kN
(9850 kgf)
16 mm
(5/8)
117 kN
(11930 kgf)
126 kN
(12848 kgf)
18 mm
(45/64)
148 kN
(15091 kgf)
160 kN
(16315 kgf)
20 mm
(3/4)
183 kN
(18660 kgf)
197 kN
(20088 kgf)
22.4 mm
(-)
230 kN
(23453 kgf)
247 kN
(25187 kgf)
5. Lifting
(1) Lift slowly and safely
(2) Do not enter the excavator area when lifting.
(3) Lift the excavator horizontally. (Modify cable or
strap connections according to needs)
Maximum strength
for example : (JIS G 35 25) - "6 x24"
Diameter
zinc-plated
not zinc-plated
10 mm (3/8)
45.8 KN (10296 lbs)
49.3 KN (11083 lbs)
12.5 mm (1/2)
71.5 KN (16074 lbs)
77 KN (17310 lbs)
14 mm (9/16)
89.7 KN (20165 lbs)
96.6 KN (21717 lbs)
16 mm (5/8)
117 KN (26303 lbs)
126 KN (28326 lbs)
18 mm (45/64)
148 KN (33272 lbs)
160 KN (35969 lbs)
6. Lifting
(1) Lift slowly and safely
(2) Do not enter the excavator area when lifting.
(3) Lift the excavator horizontally. (Modify cable or
strap connections according to needs)
Maximum strength
for example : (JIS G 35 25) - "6 x24"
Diameter
zinc-plated
not zinc-plated
10 mm (3/8)
45.8 KN
49.3 KN
12.5 mm (1/2)
71.5 KN
77 KN
14 mm (9/16)
89.7 KN
96.6 KN
16 mm (5/8)
117 KN
126 KN
18 mm (45/64)
148 KN
160 KN
52
MAINTENANCE
MAINTENANCE
MAINTENANCE INTERVALS
No.
Check points
1
Coolant
2
Fuel
3
4
5
check
Hour meter indicator
50
100
200
250
300
350
400
450
Interval
Ref.
page
every 2 years
76
57
check
Daily check
58
check
Daily check
58
change
check
Hydraulic oil
150
Daily check
change
Engine oil
Grease front
attachments
Measures
every 250 hrs
Daily check
change
70
59
every 1000 hrs
73
Bucket and bucket
link pin
-
Daily check
62
Boom swing fulcrum
-
Daily check
61
-
Daily check
62
6
Radiator and oil cooler
Others
check
Daily check
60
7
Washer liquid
check
Daily check
61
8
Engine and electrical wiring
check
Daily check
61
9
Pre-cleaner
clean
Daily check
61
10
Fuel tank, Water separator
drain
every 50 hrs
63,63
11
Battery condition
check
every 50 hrs
64
12
Greasing swing bearing teeth
-
every 50 hrs
65
13
V-belt tension
14
15
check
Radiator hoses and clamps
Air filter
element
Outer element
Inner element
Daily check
59
adjust
every 200 hrs
66
check
every 200 hrs
67
replace
every 2 years
76
clean
every 200 hrs
67
*2
replace
every 1000 hrs
75
*2
replace
every 1000 hrs
75
*2
every 200 hrs
68
16
Greasing swing ball bearing
17
Fuel filter cartridge
replace
every 500 hrs
72
18
Engine oil filter
replace
every 250 hrs
71
19
Drive unit oil
change
every 500 hrs
71
20
Breather filter
replace
every 500 hrs
72
21
Hydraulic return filter element
replace
every 1000 hrs
73
22
Hydraulic suction filter element
replace
every 1000 hrs
73
23
Filter in the pilot hydraulic system
replace
every 1000 hrs
72
24
Fuel injection nozzle injection pressure
check
every 1500 hrs
75
25
Front idler and track roller oil
change
every 2000 hrs
75
26
Alternator and starter motor
check
every 2000 hrs
75
27
Injection pump
check
every 3000 hrs
75
28
Radiator system
rinse
every 2 years
76
check
every 200 hrs
69
replace
every 2 years
78
29
Fuel line and Intake air line
*1
-
D 500 thru 1000 continued to the following table.
@
@
*4
@
*4
@
*3
@
MAINTENANCE
No.
Check points
1
Coolant
2
Fuel
3
Engine oil
4
Hydraulic oil
Measures
check
Hour meter indicator
500
550
650
700
750
800
1000
Interval
Ref.
page
every 2 years
76
Daily check
change
check
Daily check
check
Daily check
change
check
600
57
58
58
every 250 hrs
Daily check
change
70
59
every 1000 hrs
73
Bucket and bucket
link pin
-
Daily check
62
Boom swing fulcrum
-
Daily check
61
5
Grease front
attachments
6
Radiator and oil cooler
7
8
Others
-
Daily check
62
check
Daily check
60
Washer liquid
check
Daily check
61
Engine and electrical wiring
check
Daily check
61
Daily check
9
Pre-cleaner
clean
10
Fuel tank, Water separator
drain
every 50 hrs
63,63
11
Battery condition
check
every 50 hrs
64
12
Greasing swing bearing teeth
13
check
V-belt tension
every 50 hrs
Daily check
65
59
adjust
every 200 hrs
66
check
every 200 hrs
67
replace
every 2 years
76
clean
every 200 hrs
67
*2
replace
every 1000 hrs
75
*2
replace
every 1000 hrs
75
*2
every 200 hrs
68
72
Radiator hoses and clamps
15
Air filter
element
16
Greasing swing ball bearing
17
Fuel filter cartridge
replace
every 500 hrs
18
Engine oil filter
replace
every 250 hrs
71
19
Drive unit oil
change
every 500 hrs
71
20
Breather filter
replace
every 500 hrs
72
21
Hydraulic return filter element
replace
every 1000 hrs
72
22
Hydraulic suction filter element
replace
every 1000 hrs
73
23
Filter in the pilot hydraulic system
replace
every 1000 hrs
72
24
Fuel injection nozzle injection pressure
check
every 1500 hrs
75
25
Front idler and track roller oil
change
every 2000 hrs
75
26
Alternator and starter motor
check
every 2000 hrs
75
27
Injection pump
check
every 3000 hrs
75
28
Radiator system
rinse
every 2 years
76
29
Fuel line and Intake air line
check
every 200 hrs
69
replace
every 2 years
78
Inner element
*1
61
14
Outer element
53
-
@
@
*4
@
*4
@
*3
@
54
MAINTENANCE
C Air-conditioner
No.
Check points
1
Air filter
2
Air conditioner condenser
3
Air conditioner pipes and hoses
4
Refrigerant (gas)
No.
Check points
1
Air filter
2
Air conditioner condenser
3
Air conditioner pipes and hoses
4
Refrigerant (gas)
Hour meter indicator
Interval
Ref.
page
clean
every 200 hrs
69
*2
replace
every 1000 hrs
-
*2
clean
every 200 hrs
70
check
every 1 year
75
replace
every 2 years
76
service as required
78
Interval
Ref.
page
clean
every 200 hrs
69
*2
replace
every 1000 hrs
-
*2
clean
every 200 hrs
70
check
every 1 year
75
replace
every 2 years
76
service as required
78
Measures
50
100
150
200
250
300
350
400
450
check
Measures
check
Hour meter indicator
500
550
600
650
700
750
800
1000
First operation
*1 When using a hydraulic hammer, change hydraulic oil and return filter according to the table on "Hydraulic Oil
Change (Including Exchange of the Suction Filter in the Hydraulic Tank) under "EVERY 1000 SERVICE HOURS" in the
chapter "REGULAR CHECKS AND MAINTENANCE WORK".
*2 Clean and replace the air filter more frequently if used under dusty conditions. When the filter is very dirty from dusty
conditions, replace the filter.
*3 Replace only if necessary.
*4 Consult your local KUBOTA dealer for this service.
A The items listed above (@ marked) are registered as emission related critical parts by KUBOTA in the U.S.EPA nonroad emission regulation. As the engine owner, you are responsible for the performance of the required
maintenance on the engine according to the above instruction. Please see the warranty Statement in detail.
MAINTENANCE
OPENING AND CLOSING OF COVERS
BOpening/Closing of the Engine Hood
To avoid personal injury:
A Do not open the engine hood with the engine
running unless in an emergency.
A Do not touch the exhaust muffler or the
exhaust pipe; serious burns can occur.
55
BOpening/Closing of the Side Cover
1. Insert the starter key in its hole and turn it clockwise to
unlock the side cover. Pull the catch, and hold up the
side cover until the gas spring fixture stay gets locked.
2. To close the side cover, hold it up a little more, and pull
the gas spring fixture stay to get it unlocked. Lower the
side cover until it clicks into its closed position.
3. Turn the starter key counterclockwise to get the side
cover locked.
Insert the key into the key slot and turn it clockwise to
unlock it. And pull the catch to open the hood.
To close the hood, push down it until it locks
automatically.
Turn the key counterclockwise to lock the hood.
(1) Side cover
(2) Catch
(1) Engine hood
(2) Catch
(3) Key hole
(1) Stay
56
MAINTENANCE
BWhere to store the Tool
The tool box is located in front of the right side bonnet.
(1) Grease gun
(2) Grease receiver
(1) Box for storage
BWhere to store the Grease Gun
1. Open the side cover, and the grease gun storage spot
will be found inside.
(1) Side cover
2. After using the grease gun, secure it back to its fixture
and close the side cover.
If grease is collected in the grease receiver, wipe it
clean with waste cloth or the like.
Take note storage direction of greased gun in above
illustration.
MAINTENANCE
BWhere to keep Operator's Manual
57
DAILY CHECKS
To avoid personal injury:
A When operating, keep hands and body inside
of the ROPS / FOPS protective envelope.
A Do not touch the control levers and the pedals
from outside the cab during the engine
running.
For your own safety and to assure the long life of your
machine, a careful check should be made before each
operation.
BChecking Coolant Level
(1) Operator's manual storage
BCup Holder
(1) Cup holder
(2) Rear cover
To avoid personal injury:
A Move the excavator to even ground.
A Make sure that the engine is turned off.
A Do not open the radiator cap right after the
engine has been stopped; Serious burns can
occur from contact with escaping hot coolant
fluid.
A Check the coolant level in the recovery tank
only after the engine has cooled down.
A Remove the radiator cap only if absolutely
necessary.
The radiator has a recovery tank. Should the coolant level
in the radiator sink, the water will be automatically be
forwarded to the radiator.
Open the side cover. (See "Opening / Closing of the Side
Cover" in "OPENING AND CLOSING OF COVERS"
section.)
Check the coolant level in the recovery tank and fill up if
necessary. The coolant level should be between the
marks "FULL" and "LOW".
(1) Recovery tank
(A) "FULL"
(B) "LOW"
58
MAINTENANCE
A Do not fill the recovery tank over the "FULL" marking.
A Do not fill with dirty or salty water.
2. If necessary, open the cap and fill in fuel.
BChecking Fuel Level
To avoid personal injury:
A Stop the engine and remove the key before fuelling.
A Do not smoke while fuelling.
A By temperatures over -5 , use No.2-D diesel fuel,
when temperatures are under -5 , use No.1-D diesel
fuel.
A Make sure that the fuel tank is not run empty. Air will
enter the fuel system, and must be purged before
restarting.
A See "PURGING OF THE FUEL SYSTEM" in "OTHER
ADJUSTMENTS AND REPLACEMENTS"
A To prevent condensation (water) accumulations in the
fuel tank, fill the fuel into the tank before parking
overnight.
(1) Fuel tank cap
(2) Fuel level audible indication switch
Fuel tank capacity
68 L
BChecking Engine Oil Level
1. Check the fuel level by the fuel level indicator.
To avoid personal injury:
A Stop the engine and remove the key before
checking the oil level.
A Use engine oil with the correct viscosity. (according to
the outside temperature)
A After stopping the engine and remove the key, wait five
minutes, then check oil level. (Excavator must be on
level ground.)
Insert the engine oil dipstick fully into the prepared
opening, remove again and check the oil level; if
necessary fill with oil. The machine must be on level
ground when checking the oil level.
(1) Fuel gauge
(A) "EMPTY"
(B) "FULL"
(1) Engine oil dipstick
(2) Oil filling port
(A) Required oil level range
MAINTENANCE
BChecking Hydraulic Oil Level
To avoid personal injury:
A Stop the engine and remove the key before
checking the oil level.
59
2. Check the oil level as to whether it lies on the center of
the gauge at normal temperature (10 to 30 ).
3. Enough oil is present when oil is at center mark.
4. Should the oil level be too low, loosen the oil filling plug
gradually to release pressure in the tank, then fill up
with oil at oil fill port.
A Before filling oil, wipe away all sand and dust from
around the oil port. Make sure to use an identical type
of hydraulic fluid.
A The excavator has been filled with hydraulic fluid
before delivery. See "RECOMMENDED OILS".
(Do not mix different oils.)
1. Park the excavator on a firm, flat and level surface.
Lower the attachments and dozer blade to the ground
and stop the engine.
(1) Gauge
(1) Gauge
(2) Oil filling plug
BChecking V-belt
To avoid personal injury:
A Stop the engine and remove the key before
checking the V-belt.
A Check the V-belt for cracks and proper tension.
(See "Adjusting V-belt Tension" in "REGULAR
CHECKS
AND
MAINTENANCE
WORK"
section.)
60
MAINTENANCE
BChecking Radiator and Oil Cooler
To avoid personal injury;
A Always stop the engine and remove the key
before checking the radiator.
A Wear eye protection when cleaning with
compressed air.
A Replace all water hoses every two years.
A Inspect all water hoses daily.
Have the excavator repaired immediately if any
of the following defects are discovered.
(Such defects may cause burns or injury. They
may also cause engine failure or serious
engine damage.)
A Scratches, cracks or swelling in water
hoses.
A Water leaks at joints or connecting points.
A Missing or damaged water hose protective
sleeve or grommet.
A Loose mounting bolt, damaged bracket.
A Do not touch the water hoses or the heater with
your hand. You may get burned.
A If the window fails to defrost in extreme
conditions
or
becomes
cloudy
when
dehumidifying the CAB, remove moisture with
soft cloth.
A Never block all of the air outlets, system
malfunction may occur.
1. Check to see if the condenser fins are clogged with
dirt. If so, loosen the bolts and tilt the condenser.
Remove the dirt using compressed air or a hose.
Tilt down the stopper in the direction to the locked
position. When cleaning, wear eye protection. Tilt
down the oil cooler by loosening the two bolts to clean
easily.
2. Check the rubber hoses for damage and replace if
cracked or old. Check if the hose clamps are tight
enough.
(1) Radiator
(2) Oil cooler
(3) Bolt
(4) Stopper
(1) Radiator
(2) Oil cooler
(3) Stopper
(1) Hose clamp
(2) Rubber hose
MAINTENANCE
A Radiator and oil cooler fins and ribs must be clean in
order to avoid overheating the engine and to allow free
flow of air through the cooling elements.
A Pressure of compressed air must be under 205 kPa
(2.1 kgf.cm , 30 psi)
BChecking Washer Liquid
If the windows washer is switched on with the washer
liquid tank empty, the motor may be damaged. Always
keep the tank filled.
61
BChecking and Cleaning Engine and
Electrical Wiring
To avoid personal injury:
A Always stop the engine and remove the key
before cleaning the wiring, cables and engine.
Before starting, check whether flammable substances
have gathered on the battery, the cables and wiring, the
muffler or on the engine. Remove thoroughly.
Check the electrical circuitry for disconnections, shorts or
loose terminals.
BGreasing Boom Swing Fulcrum
Grease the marked grease nipples shown by arrows in the
illustration below.
(1) Washer liquid tank
BCleaning Pre-Cleaner
To clean the pre-cleaner, remove the wing nut and
remove the pre-cleaner bowl.
BWashing Whole Machine
A Do not wash the excavator with the engine running.
Water could enter the air filter and damage the engine.
Make sure that the air filter is kept dry.
A Remove the mud before washing the machine.
(1) Wing nut
(2) Pre-cleaner bowl
(A) "DUST LEVEL"
62
MAINTENANCE
BGreasing Front Attachments (without
Bucket Pin and Boom Swing Fulcrum)
To avoid personal injury:
A First lower all attachments on the ground then
stop the engine and remove the key.
A While greasing, take care not to step on the
bucket teeth.
A When doing excavation work in water, generously
grease the following points. After ending work, grease
again.
Grease the marked grease nipples shown by arrows in the
illustration below.
(1) Dozer cylinder boss
(2) Dozer linkage pin
BGreasing Bucket Pin and Bucket Link Pin
To avoid personal injury:
A First lower all attachments on the ground then
stop the engine and remove the key.
A While greasing, take care not to step on the
bucket teeth.
A When doing excavation work in water, generously
grease the following points. After ending work, grease
again.
(1) Boom bottom linkage
(2) Arm bottom linkage
(3) Boom cylinder boss
(4) Arm cylinder boss
(5) Bucket cylinder boss
Grease the marked grease nipples shown by arrows in the
illustration below.
(1) Bucket link pin
(2) Fixing pin between arm and bucket
(1) Swing cylinder boss
REGULAR CHECKS AND MAINTENANCE WORK
63
REGULAR CHECKS AND MAINTENANCE WORK
BDraining Water Separator
To avoid personal injury:
A When operating, keep hands and body inside
of the ROPS / FOPS protective envelope.
A Do not touch the control levers and the pedals
from outside the cab during the engine
running.
EVERY 50 SERVICE HOURS
BDraining the Water from the Fuel Tank
To avoid personal injury:
A Before draining the water from the fuel tank, be
sure to stop the engine and remove the key.
A Do not smoke during inspection.
[Checking and Draining]
Water and dirt contained in fuel will settle down in the
water separator. When such foreign substances are
deposited, set the water separator handle to the
"CLOSE" position. Loosen the top screw first and then
the bottom cock to let the foreign substances out of the
separator.
Finally be sure to air-bleed the fuel system.
[Cleaning]
1. Set the water separator handle to the "CLOSE"
position.
2. Loosen and remove the cup proper, and clean its
inside with light oil.
3. Tighten up the cup proper.
1. Open the cover.
2. Open the drain cock.
(1) Cover
(2) Drain cock
(A) Open
(B) Close
(1) Screw
(2) Cup
(3) Water separator handle
(4) Line
(5) Float
(6) Cock
(A) Close
(B) Loosen
(C) Tighten
A As water is collected, the red float goes up.
When the float has reached the specified line,
immediately drain the water separator.
A In reattaching the water separator, be careful to keep
off dust and dirt.
A Be sure to purge the fuel system before getting the
machine restarted.
(See "PURGING OF THE FUEL SYSTEM" in
"OTHER
CHECKS
AND
REPLACEMENTS"
section.)
64
REGULAR CHECKS AND MAINTENANCE WORK
BBattery
To avoid the possibility of a battery explosion:
For refillable type battery, follow the instructions
below.
A Do not use or charge the refillable type battery
if the fluid level is below the LOWER (lower limit
level) mark. Otherwise, the battery component
parts may prematurely deteriorate, which may
shorten the battery's service life or cause an
explosion. Check the fluid level regularly and
add distilled water as required so that the fluid
level is between the UPPER and LOWER levels.
To avoid personal injury:
A Never remove the vent caps while the engine is
running.
A Keep electrolyte away from eyes, hands and
clothes. If you are spattered with it, wash it
away completely with water immediately and
get medical attention.
A Wear eye protection and rubber gloves when
working around the battery.
A Before inspection or dismounting the battery,
be sure to turn off the engine and turn the
starter switch to the "OFF" position.
A When removing the battery, always disconnect
the negative ground cable first. When installing
a battery, always connect the ground cable
last. This prevents a possible explosion caused
by sparks.
A Always wear eye protection when working with
the battery.
1. Open the side cover. (See "Opening / Closing of the
Side Cover in "MAINTENANCE" section.)
2. Check the battery fluid level and add distilled water if
necessary.
3. Should battery fluid be spilled, fill with sulphuric acid
solution of the same concentration.
4. Clean the battery caps (ventilation holes).
(1) Battery
(A) "Upper level"
(B) "Lower level"
REGULAR CHECKS AND MAINTENANCE WORK
BBattery Charging
To avoid personal injury:
A When the battery is being activated, hydrogen
and oxygen gases in the battery are extremely
explosive. Keep open sparks and flames away
from the battery at all times, especially when
charging the battery.
A When charging battery, remove battery vent
plugs.
A When disconnecting the cable from the battery,
start with the negative terminal first.
When connecting the cable to the battery, start
with the positive terminal first.
A Do not check battery charge by placing a metal
object across the terminals.
Use a voltmeter or hydrometer.
1. Make sure each electrolyte level is to the bottom of
vent wells. If necessary add distilled water in a wellventilated area.
2. The water in the electrolyte evaporates during
recharging. Liquid shortage damages the battery.
Excessive liquid spill damages the excavator body.
3. To slowly charge the battery, connect the battery
positive terminal to the charger’s positive terminal and
the negative to the negative one. Then, recharge in the
standard fashion.
4. A boost charge is only for emergencies. It will partially
charge the battery at a high rate and in a short time.
When using a boost-charged battery, it is necessary to
recharge the battery as early as possible.
Failure to do this will shorten the battery's service life.
5. When the specific gravity of electrolyte falls between
1.27 and 1.29, charge has completed.
6. When exchanging old battery for a new one, use
battery of equal specification.
65
BGreasing Swing Bearing Teeth
1. Pump grease with the grease gun through the grease
nipple.
2. Grease at each 90 (1.58 rad.) position of the swing
frame.
3. Fill with approx. 50g of grease (approx. 20 to 30
pumps with the grease gun at each position).
Distribute the grease over the teeth.
(1) Grease nipple (for swing bearing teeth)
66
REGULAR CHECKS AND MAINTENANCE WORK
EVERY 200 SERVICE HOURS
Do all 50 and 100 hour servicing at the same time.
BAdjusting V-belt Tension
C Checking and adjustment of the fan belt tension
1. Press the fan belt down in the middle, with a force of
approx. 68.6 N (7 kgf). The belt tension is correct if it
deflects about 12 to 15 mm. If otherwise, loosen bolt
and shift the alternator in the direction shown by the
arrow.
2. Replace the fan belt if worn out, cracked or torn.
To avoid personal injury:
A First stop the engine and remove the key.
A After servicing, make sure to replace the belt
cover in its original position.
C Checking and adjustment of the air-conditioner
belt tension
1. Press the air-conditioner belt down in the middle, with
a force of approx. 58.8 to 68.6 N (6 to 7 kgf). The belt
tension is correct if it deflects about 7 to 9 mm. If
otherwise, loosen bolt of the tension pulley and shift
the tension pulley in the direction shown by the arrow.
2. Replace the air-conditioner belt if worn out, cracked or
torn.
(1) Fan belt
(2) Alternator
(3) Pulley
(4) Fan pulley
(5) Bolt and nut
(A) 12 to 15 mm
(B) Tighten
A If the engine is run with a loose fan belt, the belt could
slip and cause overheating of the engine. Check fan
belt tension regularly.
(1) Air-conditioner belt
(2) Tension pulley
(3) Air-conditioner compressor
(4) Pulley
(5) Bolt
(A) 7 to 9 mm
(B) Tighten
A If the engine is run with a loose air-conditioner belt, the
belt could slip and cause insufficient battery charging.
Check air-conditioner belt tension regularly.
A Should the air-conditioner belt break or jump off, the
indicator light for battery charge will light up. Stop the
engine and remove the key immediately.
REGULAR CHECKS AND MAINTENANCE WORK
BChecking Radiator Hoses and Clamps
To avoid personal injury:
A Wait long enough for the radiator coolant to
cool down.
67
BInspection and Cleaning Air Filter Element
Open the engine hood and remove the dust-cover. Take
out only outer element, clean the element, case interior
and reassemble. During reassembly, take care to install
the dust-cover so that its TOP mark (arrow) faces upwards. Do not remove the inner element.
Check the coolant hoses for proper connection. This
check should be carried out every 200 hours or every 6
months, whichever comes first.
1. Should the hose clamps become loose or coolant
leaks, tighten the hose clamps properly.
2. Should the radiator hoses become swollen, aged or
cracked, they must be replaced and the hose clamps
tightened again properly.
A Should the machine be used in extremely dusty areas,
the air filter element must be inspected and cleaned
more frequently than in the specified maintenance
periods.
A The air filter has a dry element, keep free from oil.
A Do not run the engine without the air filter.
(1) Radiator hoses
(1) Inner element
(2) Outer element
(3) Dust-cover
(4) Clamps
(2) Hose clamps
68
REGULAR CHECKS AND MAINTENANCE WORK
BAir Filter Maintenance
To avoid personal injury:
A Wear eye protection.
BGreasing Swing Ball Bearing
1. Grease through the respective grease nipple. (at the
central nipple)
2. Grease at each 90 (1.58 rad.) position of the swing
frame.
(1) Grease nipple
The quickest and safest method of maintenance is the
exchange of the paper cartridge. Furthermore there are
different methods of cleaning the cartridge.
C Cleaning with compressed air
Pressure of compressed air must be under 205 kPa (2.1
kgf/
), and the cartridge should be blown clean from the
inside to the outside until the dust deposits are noticeably
reduced.
A If the air suction is still inadequate, or the color of the
exhaust gases is abnormal even after the cleaning, the
air filter cartridge must be replaced.
REGULAR CHECKS AND MAINTENANCE WORK
BChecking Fuel Line and Intake Air Line
1. Check to see that all lines and hose clamps are
tightened and not damaged.
2. If hoses and clamps are found worn or damaged,
replace or repair them at once.
69
AIR CONDITIONER
BCleaning Air Filter
Open the cover and remove the filter cover, remove the air
filter.
(1) Air filter
(1) Fuel lines
(2) Clamp bands
To avoid personal injury:
A Wear eye protection.
(1) Hoses
(2) Hose clamps
C Cleaning the air filter
A Normal use
Blow air from the opposite direction to the filter's
normal air flow.
A Do not hit the filter. If the filter becomes deformed, dust
may enter into the air-conditioner, which may cause
damage and malfunction.
70
REGULAR CHECKS AND MAINTENANCE WORK
EVERY 250 SERVICE HOURS
Do all 50 hour servicing at the same time.
BChanging Engine Oil (First Engine Oil
Change after 50 Service Hours)
To avoid personal injury:
A First stop the engine then remove the key and
wait long enough for the oil to cool down.
(1) Filter
(A) "AIR-CONDITIONER AIRFLOW"
1. Remove the drain plug on the underside of the engine
and drain all oil.
2. Re-tighten the drain plug.
A Pressure of compressed air must be under 205 kPa
(2.1 kgf/
, 30 psi).
A If the filter is very dirty, replace the air filter.
BChecking Air-Conditioner Condenser
Check air conditioner condenser to be sure it is clean from
debris.
(1) Drain plug
3. Fill up with new oil through the filling port to the
specified level.
(1) Oil filling port
(2) Engine oil dipstick
(1) Air conditioner condenser
(2) Bolt
(3) Stopper
(A) "LOCK"
(A) Required oil level range
REGULAR CHECKS AND MAINTENANCE WORK
4. Let the engine idle for approx. 5 min. Check the engine
oil level. To check the engine oil level, insert the
engine oil dipstick completely into the respective port
opening and pull out again. If the oil level lies between
both markings, no oil must be added.
71
EVERY 500 SERVICE HOURS
Do all 50, 100 and 250 hour servicing at the same time.
BDrive unit Oil Change(First Oil Change of
the 50 hours)
A Regardless of the service hours, an engine oil change
is due every 1 year.
Engine oil volumes
(with engine oil filter)
9.0 L
BReplacing Engine Oil Filter
1. Replace the oil filter cartridge at the same time as
doing the engine oil change.
2. Remove the cartridge with the supplied filter wrench.
To avoid personal injury:
A Lower all attachments to the ground, stop the
engine and remove the key before undertaking
the oil change.
1. Rotate the track so that the drain plug of the drive unit
is in the bottom position.
2. Remove the drain plug to let the oil run out. Screw in
and tighten the drain plug again and fill with gear oil
through the oil check port.
3. Fill oil until it overflows out of the oil check port.
Oil change
- first oil change after 50 hrs
- then every 500 hrs
- or at least once a year
4. Use prescribed gear oil SAE 90.
(1) Oil filter
3. Oil the O-ring of the new oil filter cartridge lightly. Then
tighten the oil filter cartridge by hand.
4. Fill engine oil to the specified level.
5. Let the engine run for approx. 5 min. and make sure
that the engine oil indicator lamp does not light up.
Then stop the engine and remove the key.
6. The engine oil level is reduced by the amount of the
filter capacity after the engine is started. It is usually
necessary to add oil.
A Always check the oil level after having exchanged the
filter.
(1) Oil check port
(2) Drain plug
(3) Oil filling port
Gear oil volume
approx. 0.9 L
72
REGULAR CHECKS AND MAINTENANCE WORK
BReplacing Fuel Filter Cartridge
To avoid personal injury:
A Keep fire away.
EVERY 1000 SERVICE HOURS
Do all 50, 100, 200, 250 and 500 hour servicing at the
same time.
BReplacing the Hydraulic Pilot Filter
Element
1. Remove the filter with the filter wrench.
2. Apply a light film of fuel to the seal of the new filter and
turn in tightly by hand.
3. Open the cock of the fuel filter again.
1.
2.
3.
4.
5.
6.
7.
8.
To avoid personal injury:
A Before replacing the element, wait long enough
for the hydraulic fluid to cool down.
Open the side cover.
Remove the pilot filter case from the head cover.
Wrench and pull out the element downward.
Replace the O-ring with a new one.
Apply a light coating of clean hydraulic oil to the O-ring
and fit it to the case firmly. Be careful not to scratch the
O-ring.
Attach the case to the head cover firmly.
Let the engine run for approx. 3 minutes.
Check the oil level of hydraulic oil tank, then tighten the
oil filling plug.
(1) Fuel filter cartridge
A After exchange of the filter, the fuel system must be
purged of air.
BReplacing Breather Filter
See "Replacing Hydraulic Return Filter Element" in
"EVERY 1000 SERVICE HOURS" section.
(1) Rear right cover
REGULAR CHECKS AND MAINTENANCE WORK
73
A Always check the oil level when replacing the filter
element.
BHydraulic Oil Change (Including
Replacing of the Suction Filter in the
Hydraulic Tank)
To avoid personal injury:
A Wait long enough for the hydraulic fluid to cool
down. Then begin with the change of the
hydraulic fluid.
(1) Head cover
(2) Element
(3) O-ring
(4) Case
1. Park the excavator on a firm, flat and level surface.
Lower the attachments and dozer blade to the ground
and stop the engine.
BReplacing Hydraulic Return Filter Element
To avoid personal injury:
A Remove the oil filter element only after the oil in
the hydraulic tank has cooled down.
1. Hold the filter support top and take the filter out of the
tank.
2. Loosen the set bolt first and then detach the return
filter from its support. Replace the filter with new one.
3. Remove the bolt from the cover. Take out and replace
the breather filter with new one.
(1) Breather filter
(2) Bolt
(3) Cover
(4) Set bolt
(5) Return filter
(6) Filter support
(7) Suction filter
2. Remove the drain plug on the underside of the
hydraulic tank and drain the oil.
(1) Drain plug
3. Remove the suction filter lock pin and detach the
suction filter. Replace the filter with new one.
74
REGULAR CHECKS AND MAINTENANCE WORK
4. Retighten the drain plug.
BHydraulic Oil Check with Hydraulic
Hammers
(1) Oil filling plug
(2) Pin
(3) Suction filter
(4) Drain plug
5. Fill oil through the oil filling opening on the top side of
the tank.
6. Let the engine run and operate the boom, arm, bucket
and boom swing device. Then bring the boom to the
highest position, pull the arm, bucket inward and boom
swing left end.
7. Fill oil again up to the center of the gauge.
Hydraulic
oil volumes
Hydraulic tank
45 L
Whole oil volumes
79 L
The hydraulic oil change after 1000 operating hours in the
operator's manual is based on normal excavator work.
Following inspection measures are valid when hydraulic
hammers are used:
1. Changing and filling up of hydraulic oil
(1) The hydraulic oil must be changed more often
when hammers are used because the machine is
subject to harder conditions than normal
excavating work.
(2) Use only the recommended oils mentioned in the
operator's manual when changing or filling with
oil.
(3) When filling up oil, do not mix oils of different
makes.
2. Changing the return filter and oil
(1) The filter must be changed more often because of
contamination resulting from the frequent
assembly and disassembly of the hoses.
(2) Use the correct replacement filter.
(3) Oil change according to operating hours.
Hydraulic
oil
Normal
excavator work
8. Install the hydraulic tank cover and tighten the oil filling
plug.
Hammer
work
portion
Return
filter
Suction
Filter
every 1000
Hrs.
every 1000
(250 Hrs.
Hrs.
after first
operation)
20%
every 800
Hrs.
every 800
Hrs.
40%
every 400
Hrs.
every 400
Hrs.
60%
every 300
Hrs.
every 300
Hrs.
more
every 200
Hrs.
every 200
Hrs.
every 1000
Hrs.
REGULAR CHECKS AND MAINTENANCE WORK
75
EVERY 1000 SERVICE HOURS OR ONCE A
YEAR
ANNUAL SERVICING
BReplacing Air Filter Element
Check the terminals periodically for proper connections.
Loose wiring or damaged cables can cause improper
functioning or short circuiting of the electrical system.
Check wiring and replace damaged components
immediately. If a fuse blows out soon after having been
replaced, contact your nearest KUBOTA dealer. Never
use a fuse other than specified.
Open the engine hood and remove the dust-cover.
Remove and replace the outer element and inner element
with new elements.
When reassembling, install the dust-cover so that its TOP
mark (arrow) faces up-wards.
BElectrical Wiring and Fuses
BChecking the Electrical Circuit
Check the electrical circuitry for disconnections, shorts or
loose terminals.
BChecking Air-Conditioner Pipes and
Hoses
To avoid personal injury:
A Do not touch the coolant hoses or the heater
with your hand. You may get burned.
(1) Inner element
(2) Outer element
(3) Dust-cover
(4) Clamps
A Shorten the replacement period if the machine is used
in dusty or sandy areas.
EVERY 1500 SERVICE HOURS
BChecking Fuel Injection Nozzle(Injection
Pressure)
Consult your local KUBOTA Dealer for this service.
EVERY 2000 SERVICE HOURS
Do all 50, 100, 200, 250, 500 and 1000 hour servicing at
the same time.
BChanging Front Idler and Track Roller Oil
A Contact your KUBOTA dealer for details.
BChecking the Alternator and Starter Motor
A Contact your KUBOTA dealer for details.
EVERY 3000 SERVICE HOURS
BChecking Injection Pump
Consult your local KUBOTA Dealer for this service.
1. Check to see that all lines and hose clamps are tight
and not damaged.
2. If hoses and clamps are found worn or damaged,
replace or repair them at once. (Consult your local
KUBOTA Dealer for this service.)
76
REGULAR CHECKS AND MAINTENANCE WORK
BIENNIAL SERVICING
To avoid personal injury:
A Do not loosen the radiator cap before the
radiator has cooled down sufficiently. Only
loosen the cap after allowing enough time for
the pressure in the system to be reduced.
Thereafter, one can remove the cap completely.
BReplacing Air-Conditioner Pipes and
Hoses
To avoid personal injury:
A Do not touch the coolant hoses or the heater
with your hand. You may get burned.
Replace air-conditioner pipes and hoses every two years.
If the hoses or pipes are swollen, hard or cracked, they
must be replaced earlier.
BReplacement of Radiator Hoses and Hose
Clamps
Replace radiator hoses and hose clamps every two years.
If the hoses are swollen, hard or cracked, they must be
replaced earlier.
(1) Radiator hoses
(2) Hose clamps
BChanging Radiator Coolant
To avoid personal injury:
A When using anti-freeze, use protective clothing
such as rubber gloves (Anti-freeze is
poisonous.).
A If you accidentally swallowed anti-freeze, seek
medical attention at once.
A When anti-freeze comes in contact with the
skin or clothing, wash it off immediately.
A Do not mix different types of Anti-freeze. The
mixture can produce a chemical reaction
causing harmful substances.
A Anti-freeze is extremely flammable and
explosive under certain conditions. Keep fire
and children away from anti-freeze.
A When draining fluids from the engine, use a
container underneath the engine body to catch
the fluids.
A Do not pour waste onto the grounds, down a
drain, or into any water source.
A Also, observe the relevant environmental
protection regulations when disposing of antifreeze.
A If swallowed, anti-freeze is poisonous to
people, animals and birds.
REGULAR CHECKS AND MAINTENANCE WORK
77
Stop the engine, then remove the key and wait until it has
cooled down completely.
1. Open the drain plug on the bottom of the radiator and
drain coolant completely. Should a recovery tank be
equipped, disconnect the line from the tank floor and
then open the drain cock.
2. To clean, rinse the radiator with water.
3. Close the drain plug, and fill the radiator and the
recovery tank with coolant fluid. Let the engine idle for
about 5 min. Stop the engine and remove the key.
4. Check the coolant level of recovery tank and add the
coolant if necessary.
5. The shipped machine has been filled with 50% antifreeze solution.
(1) Recovery tank
Cooling water
(1) Drain plug
(A) "FULL"
(B) "LOW"
Canopy
Approx. 7.8 L
Cabin
Approx. 8.1 L
A Do not operate the engine without coolant.
A To fill the radiator system and the recovery tank, use
fresh water and anti-freeze fluid.
A When the anti-freeze is mixed with water, the antifreeze mixing ratio must be less than 50%.
A Tighten the radiator cap properly. If the cap is loosely
or not properly fitted, overheating of the engine can
result due to coolant fluid loss.
BReplacing Fuel Hoses and Clamps
Replace the hoses and clamps.
(See "Checking Fuel and Intake Air Line" in "EVERY 200
SERVICE HOURS")
(1) Radiator cap
(1) Fuel lines
(2) Clamp bands
78
REGULAR CHECKS AND MAINTENANCE WORK
2. Look into the sight glass to see if the refrigerant is
flowing through its circuit.
BReplacing Intake Air line
Replace the hoses and clamps, if necessary.
(See "Checking Fuel and Intake Air Line" in "EVERY 200
SERVICE HOURS")
(1) Sight glass
(1) Hoses
(2) Hose clamps
SERVICING AS REQUIRED
BChecking Amount of Refrigerant (gas)
To avoid personal injury:
A Liquid contact with eyes or skin may cause
frostbite.
A In the event of a leakage, wear safety goggles.
Escaping refrigerant can cause severe injuries
to eyes.
A In contact with a flame, R134a refrigerant result
in a toxic gas.
A Do not disconnect any part of the
refrigeration circuit of the air conditioning
system. Consult your local KUBOTA Dealer for
assistance and service.
A shortage of refrigerant reduces the air-conditioner
performance. Check the following points. If it is indicated
that the amount of refrigerant is extremely low, ask your
dealer to inspect and charge.
C Checking procedure
1. Run the air-conditioner in the following conditions.
A Engine speed:
About 1500 rpm
A Temperature control lever: Maximum cooling
position (rightmost)
A Fan switch:
Highest blow (3)
A Air-conditioner switch:
ON
A Charge only with R134a not R12 refrigerant (gas).
OTHER ADJUSTMENTS AND REPLACEMENTS
79
OTHER ADJUSTMENTS AND REPLACEMENTS
PURGING OF THE FUEL SYSTEM
1. Fill up the excavator with fuel.
2. Turn the starter key to the position "RUN".
3. The air in the fuel system will automatically be purged
within one minute.
After adjustment is completed:
Using the socket wrench, tighten the grease nipple.
Tightening torque must be between 98 to 108 N-m.
A If the tracks are too tight, wear is increased.
A If the tracks are too loose, the track pads may collide
with the sprocket and wear is increased.
The track may dislocate or come off.
A Clean the track after every use.
A Should the track tension be high due to sticking mud,
lift the track with the help of the boom, arm and bucket,
idle the engine and remove mud from the track by
rotating it.
C Tension the tracks as specified:
1. Loosen the bolt and remove the cover.
2. Apply grease to the grease nipple.
(1) Starter switch
(A) "STOP"
(B) "RUN"
(C) "START"
A If the purging was insufficient, the engine dies right
after starting. In this case repeat steps 2 to 3 again.
ADJUSTMENT OF TRACKS
C To loosen the tracks, follow the following
procedure:
To avoid personal injury:
A Do not loosen the grease nipple completely or
too quickly. Otherwise grease under high
pressure in the tension cylinder could squirt
out.
A Do not crawl under the excavator.
1. Loosen the bolts and remove the cover.
2. Using a socket wrench, loosen the grease nipple a few
turns.
3. When grease oozes out from the thread, rotate the
track and loosen the track in the lifted position (see
illustration).
(1) Cover
(2) Bolt
(3) Grease nipple
(4) Grease gun
3. Rubber Tracks
Tension the track in the lifted position, so that the
distance "A" (clearance between the track roller and
the inside surface of the track) see illustration, in this
case, if there is a seam mark " " on the inside
surface of the track, the seam mark " " is positioned
on the top center between the idler and the sprocket.
Steel Tracks
To check the track tension, the track must be lifted
from the ground as shown. The track tension is correct
if the clearance between the outer end of the track
roller and the track interior surface corresponds to the
dimension specified in the table below.
80
OTHER ADJUSTMENTS AND REPLACEMENTS
To avoid serious injury or death:
A Do not work under the machine in this
condition.
A For your safety do not rely on hydraulically
supported devices, they may leak down and
suddenly drop or be accidentally lowered.
To avoid personal injury or death:
A When lifting the machine itself with an
attachment, place a safety block or safety post
to prevent the machine from turning over. Keep
the lock lever for attachment control in the
"LOCK" position.
(1) Drive sprocket
(2) Idler
(A)
80 to 85 mm
A Make sure that no obstacles, such as stones are
caught in the track. Remove such obstacles before
adjusting the track tension.
A Track seam
The ends of the rubber track are joined with a seam.
When adjusting the tracks, the seam must be
positioned on the top midway between the idler and
the sprocket.
If the seam is positioned incorrectly, the tracks will be
tensioned too loosely, and a further readjustment will
be necessary.
A Rotate the track after adjustment one to two times to
check the tension.
A Additionally following points are to be observed when
adjusting rubber tracks.
(1) If the track loosen more than 50 mm, readjust
them.
(2) Check track tension 50 hours after initial use and
readjust if necessary. Check and adjust thereafter
every 50 service hours.
BSpecial Information when Using Rubber
Tracks
(1) Seam (Mark "
(A)
")
10 to 15 mm
1. When turning, make a slow swing turn. Avoid spin
turns to reduce lug wear and entry of dirt.
2. The relief valve may be activated if too much dirt and
sand clog the tracks. In this case move the machine for
a short distance straight backwards to let the earth and
sand fall off, then a turn can be made.
3. Avoid using rubber track on riverbeds, stony
underground, ferro-concrete and on iron plates. The
rubber can damage as well as increase wear on the
tracks.
OTHER ADJUSTMENTS AND REPLACEMENTS
CHANGING THE BUCKET
To avoid personal injury:
A There are two people required to replace the
bucket. One person operates the excavator,
and the other one mounts the bucket.
The person who mounts the bucket must
command-guide the movements of the front
end attachments. The operator should move
the front end attachments only according to the
commands of the person who mounts the
bucket. Continuous visibility between both
persons is indispensable. If there is no
visibility, stop working immediately.
A When replacing the bucket, make sure to wear
eye protection, a helmet and protective gloves.
A During attaching and detaching, chippings and
burns may occur at the bolts or bushings.
These may cause severe injuries.
A Never use your fingers for the alignment of the
components (linkage, bucket, arm). The
components may sever your fingers by
uncontrolled movements.
A Read the manual of the attachment to do a
correct
operation
safely
when
other
attachments are installed instead of Kubota
specified bucket.
81
FUSES
To avoid personal injury:
A When changing fuse, stop the engine and turn
the key in position "STOP". Keep the lock lever
for attachment control in the "LOCK" position.
(1) Cover
(1) Fuse box
BReplacing Fuses
1. Remove the cover of the fuse box.
2. Replace the burnt out fuse with a fuse having the same
capacity.
82
OTHER ADJUSTMENTS AND REPLACEMENTS
BFuse Capacities and Circuits
[CAB (Air-conditioner type)]
[Canopy]
1
Cab Light
13
AI Motor
2
Work Light
14
Horn SW
1
Cab Light
10
Fuel Pump
3
Meter (+B)
15
ECU (+B)
2
Work Light
11
Lever Lock
4
Horn
16
Beacon
3
Meter (+B)
12
Starter
5
Room Light
17
A/C Controller (+B)
4
Horn
13
AI Motor
6
Alternator
18
Engine Stop
5
Room Light
14
Horn SW
7
Cab Relay
19
Blower Motor
6
Alternator
15
ECU (+B)
8
Meter (AC)
20
Electrical Outlet
7
Cab Relay
16
Beacon
9
ECU (AC)
21
Radio (AC)
8
Meter (AC)
17
Engine Stop
10
Fuel Pump
22
Wiper / Washer
9
ECU (AC)
18
Electrical Outlet
11
Lever Lock
12
Starter
23
Compressor,
A/C Controller (AC)
OTHER ADJUSTMENTS AND REPLACEMENTS
BAuxiliary Electric
Max power is less than 110 W including the equipped light
55W.
If you need another auxiliary electric, contact your
KUBOTA dealer for details.
83
C Replacement procedure
[80 Amp. Slow-blow fuse]
1. Disconnect the negative cord of the battery.
2. Remove the slow blow fuse case.
(1) Slow blow fuse case
(1) Auxiliary Electric
3. Open the slow blow fuse case cap and cover then
remove the bolts and draw out the slow blow fuse (B).
BSlow Blow Fuse
Slow blow fuse is provided to protect the electrical circuits.
If the fusible link is blown, check the electrical circuits for
trouble and then replace with a new compatible slow blow
fuse.
(1) Slow blow fuse case cap
(2) Cover
(3) Bolt
(4) Slow blow fuse (B)
(1) Slow blow fuse
(A)
(B)
80A Alternator
(C)
50A Main Power
(D)
50A Engine Stop Cab Relay (Blower Motor)
84
TROUBLESHOOTING
TROUBLESHOOTING
If the excavator does not show the desired performance, or when trouble arises, refer to the table below and undertake
appropriate measures.
Trouble
Starting
difficulties
Insufficient
engine power
Engine
Engine suddenly
stops.
Abnormal
exhaust gas
color
Water
temperature
in red zone
(Overheating)
Cause
Countermeasure
Lock levers in "UNLOCK"
position
* Bring lock lever into "LOCK" position.
Fuel is too viscous.
* Check fuel tank and filter.
* Remove impurities and water.
* If necessary, replace filter.
Air or water in the fuel
system
* Remove water from the fuel tank.
* Check fuel pipe joint bolts and nuts for looseness.
* Purging of the fuel system (for fuel filter and injection pump,
see "PURGING OF THE FUEL SYSTEM" in the chapter.
"OTHER ADJUSTMENTS AND REPLACEMENTS".)
Oil viscosity is too high the
engine runs sluggishly in
winter.
* Pour hot water over the radiator.
Battery is almost dead;
insufficient compression.
* Recharge battery.
Low fuel level
* Check fuel and add if necessary.
Clogged air cleaner
* Clean the air filter element.
Low fuel level
* Check fuel and add if necessary.
* Purge the fuel system.
Poor fuel
* Use high quality fuel.
Too much engine oil
* Drain engine oil to prescribed oil level.
Defective seal of the water
pump
* Replace.
Worn or torn V-belt
* Adjust or replace.
Thermostat is defect.
* Replace.
Coolant level too low
* Fill to prescribed level.
Radiator grill or fins are
clogged.
* Clean.
Coolant is contaminated
with rust from the cylinder
head or crank case.
* Replace coolant fluid and add anti-rust.
Defective radiator cap
(Evaporation)
* Replace.
Corroded coolant pipes
* Clean.
Continuous operation
under full load
* Reduce load.
TROUBLESHOOTING
Trouble
Engine
Hydraulic
System
Water
temperature
in red zone
(Overheating)
Cause
Cylinder head gasket is
damaged (Coolant loss).
* Replace.
Engine oil level too low
* Fill to prescribed level.
Maladjustment of fuel
injection
* Readjust ignition timing.
Use of poor fuel
* Use prescribed fuel.
Boom, arm,
Hydraulic oil level too low
bucket, drive,
swing and dozer Leakages of hoses and /
power is too low. or joints
Swing motor and
front attachment
does not work.
Drive
System
Deviation of
drive direction
Al
System indicator
light flashes.
Countermeasure
* Add oil.
* Replace hose or joint.
Lock lever in "LOCK"
position
* Bring lock lever into "UNLOCK" position.
Blocked through stones
* Remove.
Track too loose or too tight * Adjust accordingly.
Fuse in fuse box defective * Replace the fuse.
85
86
OPERATION UNDER COLD WEATHER CONDITIONS
OPERATION UNDER COLD WEATHER CONDITIONS
PREPARATION FOR OPERATION IN COLD
WEATHER
1. Replace engine oil and hydraulic oil with those of
viscosities suitable for cold weather.
2. In cold weather, battery power drops, and the battery
fluid may freeze if the battery is not sufficiently
charged. To prevent the battery fluid from freezing, be
sure to keep the battery charged at least 75% or more
of its capacity after operation. To ease next starting, it
is recommended to keep the battery stored in closed
or heated rooms. If the battery fluid level is too low, do
not add after operation, but add with the engine
running before the next operation.
3. Add anti-freeze to coolant in the radiator and recovery
tank, if the ambient temperature is expected to drop
below 0 (32 ). Mixing ratio of water and anti-freeze
depends on the expected ambient temperature.
When mixing, stir it up well, and then fill into the
radiator.
A Mixing ratio between water and anti-freeze
Ambient
Temperature
-5
-10 -15 -20 -25 -30 -35
Antifreeze %
30
30
30
35
40
45
50
Water %
70
70
70
65
60
55
50
A Use permanent anti-freeze or long-life coolant.
A Drain the coolant completely and clean the radiator
inside then fill with the water and anti-freeze mixture.
A As the anti-freeze also acts as an anti-corrosive, it is
not necessary to add an additive to the water and antifreeze mixture.
A See "Coolant check"under "DAILY CHECKS" in
"MAINTENANCE" for radiator fill volumes.
PROCEDURE AFTER DONE WORK
Clean the excavator thoroughly after work and wipe dry.
Otherwise mud and earth on the tracks could freeze if the
temperature drops below the 0 (32 ) mark. Operation
of the excavator is then not possible. Store the excavator
in a dry place; if not possible, store on wooden planks or
on mats. If the excavator is kept on damp or muddy
ground, the tracks could freeze overnight. Operation of
the excavator is then not possible. Furthermore the
reduction gear may be damaged.
Additionally, the piston rods of the hydraulic cylinders
must be rubbed dry. Otherwise severe damage could
occur if dirty water seeps through the seals.
LONG STORAGE
87
LONG STORAGE
To avoid personal injury:
A Do not clean the excavator with the engine running.
A To avoid the danger of exhaust fume poisoning, do not operate the engine in a closed building without
proper ventilation.
A When storing, remove the key from the starter switch to avoid unauthorized persons from operating the
excavator and getting injured.
A Bring the excavator on a firm, flat, and level surface. Lower the attachments and dozer blade on the ground.
B Should the Excavator be Stored for a Longer Period of Time, Observe Following Procedures:
1. The whole excavator should be cleaned thoroughly and in all cases stored indoors. If the excavator has to be kept
outdoors, lay out wooden planks on even ground, place the excavator on the planks and cover completely.
2. Do an oil change and grease the excavator.
3. Heavily grease the visible section of the cylinder rods.
4. Remove the battery and store indoors.
5. If it is expected that the temperature will sink below the 0 mark, add anti-freeze or drain coolant completely.
A Wash the excavator after stopping the engine.
If you wash the excavator while running the engine, splashing water gets into the air cleaner through its intake and
cause engine damage.
Carefully, wash and do not splash water over the air cleaner while the engine is running.
B Observe Following Procedures when the Machine is to be Operated after Long Storage.
1. Wipe off the grease from the hydraulic cylinder rods.
2. Turn on the engine and operate the attachments and the drive mechanisms under no load in order to circulate the
hydraulic oil.
(If the machine is stored for longer than one month, do steps 1 and 2 once every month.)
88
LONG STORAGE
Periodic replacement of important component parts
To ensure safety in operation, you are strongly requested to inspect and service the machine at regular intervals. For added
safety, ask your KUBOTA dealer to replace the following important component parts.
These parts are prone to degradation in material or subject to wear and tear with time. It is difficult to judge how much they
have been affected at regular inspection. It is therefore necessary to replace them with new ones, whether wear is visible
or not after a specified time of use.
If any of them is found worn even before the specified use, it must be repaired or replaced the same way as other parts.
If any of the hose clamps is found deformed or cracked, the hose clamp must also be replaced.
For the hydraulic hoses other than the ones to be replaced periodically, inspect them for the following points. If found
unusual condition, tighten them up, replace them.
When replacing the hydraulic hoses, change their O rings and sealings with new ones.
For replacement of the important parts, contact your KUBOTA dealer.
A At the following periodic inspections, check the fuel hoses and hydraulic hoses as well.
Inspection Interval
Daily Checks
Every month
Every year
Check points
Oil leak at fuel and hydraulic hose connections and points
Oil leak at fuel and hydraulic hose connections and points
Damages at fuel and hydraulic hose (cracks, chafing)
Oil leak at fuel and hydraulic hose connections and points
Interference, deformation, degradation, twist and other damages (cracks, chafing) of fuel and hydraulic hoses
List of important component parts
No.
1
2
3
4
5
Component parts
Fuel hose
Hydraulic hose (suction)
Hydraulic hose (delivery)
Hydraulic hose (Boom cylinder)
Hydraulic hose (Arm cylinder)
6
Hydraulic hose (Bucket cylinder)
7
Hydraulic hose (Swing cylinder)
8
9
10
11
12
Hydraulic hose (Dozer cylinder)
Hydraulic hose (Service port)
Hydraulic hose (Swivel motor)
Hydraulic hose (Travel motor)
Hydraulic hose (Angle cylinder)
Used place
Q'ty
Fuel tank - Water separator
1
Water separator - Fuel pump
1
Fuel pump - Fuel filter
1
Fuel filter - Fuel nozzle
1
Fuel nozzle - Fuel cooler
1
Fuel cooler - Fuel tank
1
Tank - Pipe, Suction
1
Pipe, Suction - Main Pump
1
Main pump - Control valve
3
Main pump - Pilot filter
1
Pilot filter - Unload valve
1
Control valve - Boom cylinder
2
Control valve - Pipe, Boom
2
Pipe, Boom - Arm cylinder
2
Control valve - Pipe, Boom
2
Pipe, Boom - Bucket cylinder
2
Control valve - Swing cylinder
2
Control valve - Rotary joint
2
Rotary joint - Pipe
2
Pipe - Dozer cylinder
2
Control valve - Pipe, Boom
4
Pipe, Boom - Pipe, Boom
4
Pipe, Boom - Pipe, Arm
4
Control valve - Swivel motor
2
Control valve - Rotary joint
4
Rotary joint - Travel motor
4
Control valve - Rotary joint
2
Rotary joint - Pipe
2
Pipe - angle cylinder
2
To prevent serious damage to the hydraulic system, use only a KUBOTA genuine hydraulic hose.
Period
Every 2 years or
4000 hours
RECOMMENDED OILS
RECOMMENDED OILS
1. Before delivery the hydraulic oil used was Shell Tellus S2M46.
2. Use engine oil API service classification CJ-4 .
3. Use SAE 90 (API, GL-4/GL-5) as drive unit oil for all seasons.
89
90
APPENDICES
APPENDICES
MAIN DIMENSIONS
mm
U48-4
(A)
815
(B)
625
(C)
1960
(D)
5440
(E)
3770
(F)
3380
(G)
2670
(H)
990
U48-4
(K)
440
(L)
410
(M)
2550
(N)
1960
(O)
5710
(P)
5330
(Q)
1830
(R)
2390
A Above dimensions are based on the machine with KUBOTA original bucket.
A Above dimensions are based on the machine with rubber track.
A Specifications subject to change without notice.
(I)
4135
(J)
5850
LIFTING CAPACITY
91
LIFTING CAPACITY
1. The lifting capacities are based on ISO 10567 and do not exceed 75% of the static tilt load of the machine or 87% of
the hydraulic lifting capacity of the machine.
2. The strokes are as follows.
(1) The load point corresponds to the front bolt part of the arm.
(2) The machine positions are (i) over - front (Blade down), (ii) over - front (Blade up), and (iii) over - side.
(3) The operating cylinder is the boom cylinder.
3. The bucket of the excavator, the hook, the sling and other lifting accessories are taken into consideration for the loads.
Machine conditions:
No bucket, all others according to the standard regulations.
To avoid personal injury or death:
A No loads greater than those values mentioned in the lifting capacity tables are to be lifted.
A The values mentioned in the table are valid only on even, hard grounds. When lifting on soft ground, the
machine can tip over due to the load being concentrated only on one side of the machine.
A The table values are calculated at the end of the arm without the bucket. In order to find the allowable loads
for machines with bucket, the bucket weight must be subtracted from the values in the table.
A Never lift the machine with the angle blade placed at an angle.
92
LIFTING CAPACITY
LIFTING CAPACITY
93
94
LIFTING CAPACITY
LIFTING CAPACITY
95
96
LIST OF SCREENS
LIST OF SCREENS
LIST OF NORMAL SCREENS
No.
Message
Problem or failure
(What happened)
Machine behavior
(Provisional measure)
Correction
Glow screen
1
Wait until the glow mark
This screen indicates that
disappears. Then get the
the glow lamp is on.
engine started.
-
This screen shows the
normal status. (Hour meter)
-
-
This screen shows the
normal status. (Tachometer)
-
-
-
-
-
-
Default screen
(normal)
2
Default screen
(normal)
Tachometer (graph)
3
4
Default screen
(normal)
Tachometer (numeric) This screen shows the
normal status. (Numerical
display
of
tachometer
readings)
AUX port enable
switch activated
5
AUX port enable screen
LIST OF SCREENS
NAVIGATION LIST OF SCREENS
97
If an error occurs with the machine, one of the following messages appears in the LCD display.
In case of trouble, immediately contact your local dealer for inspection and repair.
While the (
) (information mark) appears onscreen, press the information switch, and detailed information will be
displayed.
Notify your local dealer of this and other information.
No.
Message
Problem or failure
(What happened)
Machine behavior
(Provisional measure)
Correction
Clock setting request
1
The battery is disconnected,
thereby requiring to set the
clock.
Press Switch 5 to set the
clock.
-
This message indicates a
procedural step.
Tilt up the pilot control lock
lever.
This message disappears by
tilting up the pilot control lock
lever.
-
This message indicates a
procedural step.
Tilt down the pilot control
lock lever.
This message disappears by
tilting down the pilot control
lock lever.
-
This message indicates a
procedural step.
Start the engine.
This message then
disappears.
-
This message appears if the
AUX function is tried without
pressing the AUX port
enable switch.
Press the AUX port enable
switch.
-
Tilt up the lock lever.
2
Tilt down the lock
lever.
3
Start the engine.
4
Press Switch 3.
5
Not equipped with
AUX2/Thumb function
6
The AUX2 port is tried on
machines not equipped with
AUX2 function.
-
-
98
No.
LIST OF SCREENS
Message
Not equipped with
overload warning
function
7
Problem or failure
(What happened)
Machine behavior
(Provisional measure)
Correction
This message appears if the
overload warning switch is
pressed on machines not
equipped with overload
warning system.
-
-
Fuel is running out.
-
Out of fuel
8
The fuel sensor system is in
trouble.
The fuel level indicator does
not appear on the
meter.Press the display
selector switch, and the
normal display is switched
back.The machine's other
functions are still operative.
Immediately contact your
local dealer.
Charging system is in
trouble.
The battery is not changing.
The machine works until the
battery goes dead.
Immediately contact your
local dealer.
The engine lubricating
system oil pressure is too
low. Stop the engine.
The engine may get burnt
out. Immediately stop the
engine.
Immediately contact your
local dealer.
This message appears if a
jumper cable is connected to
a 24V battery or improper
device to get the engine
started or if the alternator is
in trouble.
Immediately interrupt the
engine if with a 24V battery.
When the engine gets
restarted and is running with
no message appearing, it
means there is no problem.
If this message still appears,
immediately ask for repair.
Water temperature is rising
somewhat higher than
specified.
Operate with the load a little
lessened.
Check the radiator and other
components for clog.
Immediately clean them up.
-
Fuel sensor error
9
Add fuel.
Charging system error
10
Engine oil pressure
error
11
Overvoltage
12
Overheat advance
warning
Water temperature
rising
13
LIST OF SCREENS
No.
Message
Problem or failure
(What happened)
Machine behavior
(Provisional measure)
Correction
The engine automatically
reduces rpm's avoid an
overheat.
Leave the engine idling until
this warning disappears.
Do not stop the engine
because the coolant
temperature will increase
sharply and may boil and
gush out. Be sure to cool
down the engine without
stopping it.
Refill the radiator with
coolant by its boiled-over
amount. Unclog the radiator
and other components
before use again.
Check also the hydraulic
system for oil leak and other
troubles.
If an oil leak is found,
immediately contact your
local dealer for repair.
Water temperature sensor
error system is in trouble.
The meter does not show
water temperature.
Press the display selector
switch, and the normal
display is switched back.
The machine's other
functions are operative, but
an overheat and other
problems cannot be
detected.
Immediately contact your
local dealer.
The lock lever system is in
trouble.
The engine can run, but the
machine fails to move.
Immediately contact your
local dealer.
The 2-speed switching
system is in trouble.
The machine still runs at low
speed without switching to
high speed.
The machine's other
functions are still operative.
Immediately contact your
local dealer.
The Auto Idle system is in
trouble.
The accelerator fails too.
The accelerator fails, but the
machine's other functions
are still operative.
Move the machine to a place
suited for repair.
Immediately contact your
local dealer.
The sensor's 5V power
supply is short-circuited.
The majority of systems fail.
* The engine may get started
and the machine may move.
But do not try any jobs.
(Just move the machine to a
safe place.)
Immediately contact your
local dealer.
Cool-down during
overheat idling
14
Water temperature
sensor error
15
Lock lever system
error
16
Travel 2-speed
system (switching)
17
AI system error
18
5V short-circuit
19
99
100 LIST OF SCREENS
No.
Message
Problem or failure
(What happened)
Machine behavior
(Provisional measure)
The sensor's or switch's 12V
line is short-circuited.
The majority of systems fail.
* The engine may start and
the machine may move. But
do not try any jobs.
(Just move the machine to a
safe place.)
Immediately contact your
local dealer.
The communication (CAN)
system is in trouble. Some
meter readings may be
erroneous or some switches
may malfunction.
The engine may get started
and the machine may move.
But do not try any jobs.
(Just move the machine to a
safe place.)
Immediately contact your
local dealer.
The general switching
system is in trouble.
(This message appears only
when the general switching
function is preset effective.)
The engine can get restarted
and the machine can move,
but the general switching
system fails.
When the other systems
than the general switching
system function, the job can
be continued.
Immediately contact your
local dealer.
The AUX1 port system is in
trouble.
The engine can get restarted
and the machine can move,
but the AUX1 port system
fails.
When the other systems
than the AUX1 port system
function, the job can be
continued.
Immediately contact your
local dealer.
This message appears 10
hours before the periodic
check interval.
Press the information switch,
and the list of related
components can be
reviewed.
Get the engine started as
usual.
Ask your local dealer for
relevant part and replace the
existing part with it. After
replacement, turn on and off
the key 10 times, and this
message disappears.
The periodic check interval
has passed.
Press the information switch,
and the list of related
components can be
reviewed.
The engine can still get
started, but immediately ask
your local dealer for
replacement.
Ask your local dealer for
relevant part and replace the
existing part with it. After
replacement, turn on and off
the key 10 times, and this
message disappears.
12V short-circuit
20
CAN system error
21
General switching
system error
22
AUX1 port system
error
23
Periodic check
(advance notice)
24
Periodic check
(warning)
25
Correction
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