Operation Manual
SERIES
MODEL hhng5
ride-on trowel
(VANGUARD 540000 GASOLINE ENGINE)
Revision #0 (07/16/13)
To find the latest revision of this
publication, visit our website at:
www.multiquip.com
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
PN: 30039
Proposition 65 Warning
Engine exhaust and some of
its constituents, and some dust created
by power sanding, sawing, grinding,
drillingandotherconstructionactivities
contains chemicals known to the State
of California to cause cancer, birth
defects and other reproductive harm.
Some examples of these chemicals are:
Leadfromlead-basedpaints.
Crystalline silicafrombricks.
Cementandothermasonryproducts.
Arsenicandchromiumfromchemically
treatedlumber.
Your risk from these exposures varies,
depending on how often you do this type
of work. To reduce your exposure to
these chemicals: ALWAYS work in a
well ventilated area, and work with
approved safety equipment, such as
dust masks that are specially designed
to filter out microscopic particles.
page 2 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
Silicosis/Respiratory Warnings
WARNING
WARNING
SILICOSIS WARNING
RESPIRATORY HAZARDS
Grinding/cutting/drilling of masonry, concrete, metal and
other materials with silica in their composition may give
off dust or mists containing crystalline silica. Silica is a
basic component of sand, quartz, brick clay, granite and
numerous other minerals and rocks. Repeated and/or
substantial inhalation of airborne crystalline silica can
cause serious or fatal respiratory diseases, including
silicosis. In addition, California and some other
authorities have listed respirable crystalline silica as a
substance known to cause cancer. When cutting such
materials, always follow the respiratory precautions
mentioned above.
Grinding/cutting/drilling of masonry, concrete, metal and
other materials can generate dust, mists and fumes
containing chemicals known to cause serious or fatal
injury or illness, such as respiratory disease, cancer,
birth defects or other reproductive harm. If you are
unfamiliar with the risks associated with the particular
process and/or material being cut or the composition of
the tool being used, review the material safety data
sheet and/or consult your employer, the material
manufacturer/supplier, governmental agencies such as
OSHA and NIOSH and other sources on hazardous
materials. California and some other authorities, for
instance, have published lists of substances known to
cause cancer, reproductive toxicity, or other harmful
effects.
Control dust, mist and fumes at the source where
possible. In this regard use good work practices and
follow the recommendations of the manufacturers or
suppliers, OSHA/NIOSH, and occupational and trade
associations. Water should be used for dust
suppression when wet cutting is feasible. When the
hazards from inhalation of dust, mists and fumes cannot
be eliminated, the operator and any bystanders should
always wear a respirator approved by NIOSH/MSHA for
the materials being used.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 3
Table of Contents
HHNG5 RIDE-ON TROWEL
Proposition 65 Warning............................................ 2
Silicosis/Respiratory Warnings................................. 3
Table Of Contents..................................................... 4
Training Checklist..................................................... 6
Daily Pre-Operation Checklist.................................. 7
Safety Information............................................... 8-13
Specifications (Trowel)............................................ 14
Specifications (Engine)........................................... 15
General Information........................................... 16-17
Components (Trowel)........................................ 18-19
Components (Engine)............................................. 20
New Machine Setup............................................... 21
Inspection............................................................... 22
Operation........................................................... 23-25
Maintenance...................................................... 26-37
Troubleshooting (Trowel).................................... 38-39
Troubleshooting (Engine)................................... 40-41
NOTICE
Specifications are subject to change without notice.
page 4 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
notes
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 5
training checklist
Training Checklist
No.
description
1
Read operation manual
completely.
2
Machine layout, location of
components, checking of engine
oil level.
3
Fuel system, refueling procedure.
4
Operation of spray and lights.
5
Operation of controls (machine
not running).
6
Safety controls, safety stop switch
operation.
7
Emergency stop procedures.
8
Startup of machine, pre-heat,
engine choke.
9
Maintaining a hover.
10
Maneuvering.
11
Pitching.
12
Matching blade pitch. Twin-Pitch™
13
Concrete finishing techniques.
14
Shutdown of machine.
15
Lifting of machine (lift loops).
16
Machine transport and storage.
Ok?
date
page 6 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
daily pre-operation checklist
daily Pre-Operation Checklist
1
Engine oil level
2
Radiator coolant level
3
Condition of blades
4
Blade pitch operation
5
Safety stop switch operation
6
Steering control operation





HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 7

Safety Information
Do not operate or service the equipment before reading
the entire manual. Safety precautions should be followed
at all times when operating this equipment.
Failure to read and understand the safety
messages and operating instructions could
result in injury to yourself and others.
Potential hazards associated with the operation of this
equipment will be referenced with hazard symbols which
may appear throughout this manual in conjunction with
safety messages.
Symbol
Safety Hazard
SaFeTy meSSageS
The four safety messages shown below will inform you
about potential hazards that could injure you or others. The
safety messages specifically address the level of exposure
to the operator and are preceded by one of four words:
DaNgeR, WaRNINg, CauTION or NOTICe.
Lethal exhaust gas hazards
Explosive fuel hazards
SaFeTy SymBOLS
dANGER
Indicates a hazardous situation which, if not avoided,
will result in dEATH or SeRIOuS INJuRy.
Burn hazards
wARNiNG
Indicates a hazardous situation which, if not avoided,
COuLD result in dEATH or SeRIOuS INJuRy.
CauTION
Rotating parts hazards
Indicates a hazardous situation which, if not avoided,
COuLD result in mINOR or mODeRaTe INJuRy.
NOTICE
Addresses practices not related to personal injury.
Pressurized fluid hazards
Hydraulic fluid hazards
page 8 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
Safety Information
GENERAl SAFETY
CauTION
„ NeveR operate this equipment without proper protective
clothing, shatterproof glasses, respiratory protection,
hearing protection, steel-toed boots and other protective
devices required by the job or city and state regulations.
„ Avoid wearing jewelry or loose fitting clothes that may
snag on the controls or moving parts as this can cause
serious injury.
„ NeveR operate this equipment when not
feeling well due to fatigue, illness or when
under medication.
„ NeveR operate this equipment under the
influence of drugs or alcohol.
NOTICE
„ This equipment should only be operated by trained and
qualified personnel 18 years of age and older.
„ Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.
„ Manufacturer does not assume responsibility for any
accident due to equipment modifications. Unauthorized
equipment modification will void all warranties.
„ NeveR use accessories or attachments that are not
recommended by Multiquip for this equipment. Damage
to the equipment and/or injury to user may result.
„ AlwAYS know the location of the nearest
fire extinguisher.
„ AlwAYS know the location of the nearest
first aid kit.
„ AlwAYS know the location of the nearest phone or keep
a phone on the job site. Also, know the phone numbers
of the nearest ambulance, doctor and fire department.
This information will be invaluable in the case of an
emergency.
„ AlwAYS clear the work area of any debris, tools, etc.
that would constitute a hazard while the equipment is
in operation.
„ No one other than the operator is to be in the working
area when the equipment is in operation.
„ dO NOT use the equipment for any purpose other than
its intended purposes or applications.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 9
Safety Information
TROwEl SAFETY
NOTICE
„ AlwAYS keep the machine in proper running condition.
dANGER
„ Engine fuel exhaust gases contain poisonous carbon
monoxide. This gas is colorless and odorless, and can
cause death if inhaled.
„ The engine of this equipment requires an adequate free
flow of cooling air. NeveR operate this equipment in any
enclosed or narrow area
where free flow of the air is
restricted. If the air flow is
restricted it will cause injury
to people and property and
serious damage to the
equipment or engine.
DANGEROUS
GAS FUMES
„ NeveR operate the equipment in an explosive
atmosphere or near combustible materials. An
explosion or fire could result causing severe
bodily harm or even death.
wARNiNG
„ If applicable, NeveR use your hand to find
hydraulic leaks. Use a piece of wood or
cardboard. Hydraulic fluid injected into the
skin must be treated by a knowledgable
physician immediately or severe injury or
death can occur.
„ AlwAYS keep clear of rotating or moving
parts while operating the trowel.
„ NeveR disconnect any emergency
or safety devices. These devices are
intended for operator safety. Disconnection of these
devices can cause severe injury, bodily harm or even
death. Disconnection of any of these devices will void
all warranties.
CauTION
„ NeveR allow passengers or riders on the trowel during
operation.
„ NeveR lubricate components or attempt service on a
running machine.
„ NeveR place your feet or hands inside the guard rings
while starting or operating this equipment.
„ Fix damage to machine and replace any broken parts
immediately.
„ AlwAYS store equipment properly when it is not being
used. Equipment should be stored in a clean, dry location
out of the reach of children and unauthorized personnel.
„ A safety manual for operating and maintenance
personnel of concrete power trowels produced by the
Association of Equipment Manufacturers (AEM) can be
obtained for a fee by ordering through their website at
www.aem.org.
Order FORM PT-160
ENGiNE SAFETY
wARNiNG
„ dO NOT place hands or fingers inside engine
compartment when engine is running.
„ NeveR operate the engine with heat shields or
guards removed.
„ Keep fingers, hands hair and clothing away
from all moving parts to prevent injury.
„ dO NOT remove the radiator cap while the
engine is hot. High pressure boiling water will gush out
of the radiator and severely scald any persons in the
general area of the trowel.
„ dO NOT remove the coolant drain plug
while the engine is hot. Hot coolant will
gush out of the coolant tank and severely
scald any persons in the general area of
the trowel.
„ dO NOT remove the engine oil drain plug while the
engine is hot. Hot oil will gush out of the oil tank and
severely scald any persons in the general area of the
trowel.
CauTION
„ NeveR touch the hot exhaust manifold,
muffler or cylinder. Allow these parts to cool
before servicing equipment.
page 10 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
Safety Information
BaTTeRy SaFeTy
NOTICE
„ NeveR run engine without an air filter or with a dirty air
filter. Severe engine damage may occur. Service air filter
frequently to prevent engine malfunction.
„ NeveR tamper with the factory settings
of the engine or engine governor. Damage
to the engine or equipment can result
if operating in speed ranges above the
maximum allowable.
FueL SaFeTy
dANGER
dANGER
„ dO NOT drop the battery. There is a possibility that the
battery will explode.
„ dO NOT expose the battery to open flames,
sparks, cigarettes, etc. The battery contains
combustible gases and liquids. If these
gases and liquids come into contact with a
flame or spark, an explosion could occur.
wARNiNG
„ dO NOT start the engine near spilled fuel or combustible
fluids. Fuel is extremely flammable and its vapors can
cause an explosion if ignited.
„ AlwAYS wear safety glasses when
handling the battery to avoid eye irritation.
The battery contains acids that can cause
injury to the eyes and skin.
„ AlwAYS refuel in a well-ventilated area, away from
sparks and open flames.
„ Use well-insulated gloves when picking up
the battery.
„ AlwAYS use extreme caution when working with
flammable liquids.
„ AlwAYS keep the battery charged. If the battery is not
charged, combustible gas will build up.
„ dO NOT fill the fuel tank while the engine is running
or hot.
„ dO NOT charge battery if frozen. Battery can explode.
When frozen, warm the battery to at least 61°F (16°C).
„ dO NOT overfill tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or sparks from
the ignition system.
„ AlwAYS recharge the battery in a well-ventilated
environment to avoid the risk of a dangerous concentration
of combustible gases.
„ Store fuel in appropriate containers, in well-ventilated
areas and away from sparks and flames.
„ NeveR use fuel as a cleaning agent.
„ If the battery liquid (dilute sulfuric acid)
comes into contact with clothing or skin,
rinse skin or clothing immediately with
plenty of water.
„ dO NOT smoke around or near the
equipment. Fire or explosion could result
from fuel vapors or if fuel is spilled on a
hot engine.
„ If the battery liquid (dilute sulfuric acid) comes into
contact with eyes, rinse eyes immediately with plenty
of water and contact the nearest doctor or hospital to
seek medical attention.
CauTION
„ AlwAYS disconnect the NegaTIve battery terminal
before performing service on the equipment.
„ AlwAYS keep battery cables in good working condition.
Repair or replace all worn cables.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 11
Safety Information
TRANSPORTiNG SAFETY
CauTION
„ NeveR allow any person or animal to
stand underneath the equipment while
lifting.
„ Ride-on trowels are very heavy and
awkward to move around. Use proper
heavy lifting procedures and dO NOT
attempt to lift the trowel by the guard rings.
NOTICE
„ The easiest way to lift the trowel is to utilize the lift loops
that are welded to the frame. These lift loops are located
to the left and right sides of the operator’s seat.
A strap or chain can be attached to these lift loops,
allowing a forklift or crane to lift the trowel up onto and
off of a slab of concrete. The strap or chain should have
a minimum of 2,000 pounds (1,000 kg) lifting capacity
and the lifting gear must be capable of lifting at least this
amount.
„ NeveR transport trowel with float pans attached unless
safety catches are used and are specifically cleared for
such transport by the manufacturer.
„ NeveR hoist the trowel more than three feet off the
ground with float pans attached.
„ Before lifting, make sure that the lift loops are not
damaged.
TOwiNG SAFETY
CauTION
„ Check with your local county or state safety
towing regulations, in addition to meeting
Department of Transportation (DOT)
Safety Towing Regulations, before towing
your trowel.
„ In order to reduce the possibility of an accident while
transporting the trowel on public roads, AlwAYS make
sure the trailer that supports the trowel and the towing
vehicle are mechanically sound and in good operating
condition.
„ AlwAYS shutdown engine before transporting
„ Make sure the hitch and coupling of the towing vehicle
are rated equal to, or greater than the trailer “gross
vehicle weight rating.”
„ AlwAYS inspect the hitch and coupling for wear. NeveR
tow a trailer with defective hitches, couplings, chains, etc.
„ Check the tire air pressure on both towing vehicle and
trailer. Trailer tires should be inflated to 50 psi cold.
Also check the tire tread wear on both vehicles.
„ AlwAYS make sure the trailer is equipped with a safety
chain.
„ AlwAYS properly attach trailer’s safety chains to towing
vehicle.
„ Always make sure crane or lifting device has been
properly secured to the lift loops of the equipment.
„ AlwAYS make sure the vehicle and trailer directional,
backup, brake and trailer lights are connected and
working properly.
„ AlwAYS shutdown engine before transporting.
„ DOT Requirements include the following:
„ NeveR lift the equipment while the engine is running.
• Connect and test electric brake operation.
„ Tighten fuel tank cap securely and close fuel cock to
prevent fuel from spilling.
• Secure portable power cables in cable tray with tie
wraps.
„ Use adequate lifting cable (wire or rope) of sufficient
strength.
„ The maximum speed for highway towing is 55 MPH unless
posted otherwise. Recommended off-road towing is not to
exceed 15 MPH or less depending on type of terrain.
„ dO NOT lift machine to unnecessary heights.
„ AlwAYS tie down equipment during transport by
securing the equipment with rope.
„ Avoid sudden stops and starts. This can cause skidding,
or jack-knifing. Smooth, gradual starts and stops will
improve towing.
„ Avoid sharp turns to prevent rolling.
page 12 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
Safety Information
„ Trailer should be adjusted to a level position at all times
when towing.
„ Raise and lock trailer wheel stand in up position when
towing.
emISSIONS INFORmaTION
NOTICE
„ Place chock blocks underneath wheel to prevent rolling
while parked.
The gasoline engine used in this equipment has been
designed to reduce harmful levels of carbon monoxide
(CO), hydrocarbons (HC) and nitrogen oxides (NOx)
contained in diesel exhaust emissions.
„ Place support blocks underneath the trailer’s bumper to
prevent tipping while parked.
This engine has been certified to meet US EPA Evaporative
emissions requirements in the installed configuration.
„ Use the trailer’s swivel jack to adjust the trailer height to
a level position while parked.
Attempting to modify or make adjustments to the engine
emission system by unauthorized personnel without proper
training could damage the equipment or create an unsafe
condition.
eNvIRONmeNTaL SaFeTy/DeCOmmISSIONINg
NOTICE
Decommissioning is a controlled process used to safely
retire a piece of equipment that is no longer serviceable.
If the equipment poses an unacceptable and unrepairable
safety risk due to wear or damage or is no longer cost
effective to maintain (beyond life-cycle reliability) and is to
be decommissioned (demolition and dismantlement),be
sure to follow rules below.
„ dO NOT pour waste or oil directly onto the ground, down
a drain or into any water source.
Additionally, modifying the fuel system may adversely affect
evaporative emissions, resulting in fines or other penalties.
Emission Control label
The emission control label is an integral part of the emission
system and is strictly controlled by regulations.
The label must remain with the engine for its entire life.
If a replacement emission label is needed, please contact
your authorized Yanmar Engine Distributor.
„ Contact your country's Department of
Public Works or recycling agency in your
area and arrange for proper disposal of
any electrical components, waste or oil
associated with this equipment.
„ When the life cycle of this equipment is over, remove
battery and bring to appropriate facility for lead
reclamation. Use safety precautions when handling
batteries that contain sulfuric acid.
„ When the life cycle of this equipment is over, it is
recommended that the trowel frame and all other metal
parts be sent to a recycling center.
Metal recycling involves the collection of metal from
discarded products and its transformation into raw
materials to use in manufacturing a new product.
Recyclers and manufacturers alike promote the process
of recycling metal. Using a metal recycling center
promotes energy cost savings.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 13
dimensions/SPECIFICATIONS (trowel)
Table 1.
B
C
A
D
Figure 1. Dimensions
Table 2. HHNG5 Specifications
A–Length – in. (cm)
97.0 (246.4)
B–Height (Seat) – in. (cm)
50.0 (127)
C–Height (Crank Handle) – in. (cm)
46.0 (117)
D–Width – in. (cm)
46.0 (117)
Weight – lbs. (kgs.) Operating
1,083 (495)
Weight – lbs. (kgs.) Shipping
1,368 (620)
Fuel Tank – gallons (liters)
5 (19)
Rotor – RPM
0 to 180
Path Width – in. (cm)
92 (233)
Gear Box Oil Capacity
144 OZ. (4.26 liters)
ISO 22O AGMA GR 5EP
page 14 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
SPECIFICATIONS (engine)
Table 3. Noise and Vibration Emissions
Model
Guaranteed ISO 11201:2010 Based Sound
a
Pressure Level at Operator Station in dB(A)
Guaranteed ISO 3744:2010 Based Sound
b
Power Level in dB(A)
Whole Body Vibration Per ISO 26311:1997 +A1:2010 in m/s2 SA(8))
HHNG5
91
106
0.03
a. With an uncertainty factor K of 2.5 dB (A) included per Note 1 in section 7.2.1 of EN 12649::2008+A1:2011
b. With an uncertainty factor K of 1.5 dB (A) included per Note 1 in section 7.2.1 of EN 12649::2008+A1:2011
Table 4. Engine Specifications
Model
540000, Briggs & Stratton, Vanguard
Type
OHV, air cooled gasoline engine
Cylinders
2
Piston Displacement
54.88 cu.in. (896 cc)
Bore and Stroke
3.36 in.x 3.07 in. (85.5 mm x 78 mm)
Max. Output
35 bhp/3600 rpm (26 kW)
Max. Torque
58.3 lbf-ft (26.4 Kg) at 2300 rpm
SAE 30, 10W-30, 5W-30 or
Engine Oil Type
SF, SG, SH, SJ or higher
Engine Oil Capacity
2.5 qt. (2.36 liters)
Lubricating System
Pressure feed with spin-on filter
Fuel Type
Gasoline - minimum of 87 octane rating
Starting System
12 VDC Electric Start
Resistor Spark Plug Type
B&S 692051
Spark Plug Gap
.030 in. (0.76 mm)
20.0 in. x 19 in. x 28 in.
Dimensions (L x W x H)
(508 mm x 483 mm x 711 mm)
Shipping Weight
149 lbs. (67.5 kg)
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 15
general information
HHNG5 Ride-On Power Trowel
Familiarization
This Ride-On Power Trowel is designed for the floating and
finishing of concrete slabs.
Twin Pitch Control™
The Twin Pitch™ control feature allows the operator to
simultaneously control the pitch of both rotors with minimal
effort yet still allows for individual pitch control.
Take a walk around your trowel. Take notice of all the major
components (see Figure 2 and Figure 3) like the engine,
blades, air cleaner, fuel system, fuel shut-off valve, ignition
switch, etc. Ensure engine and gearbox lubricant levels are
within proper operating range.
Helical Gearboxes
Read all the safety instructions carefully. Safety instructions
will be found throughout this manual and on the machine.
Keep all safety information in good, readable condition.
Operators should be well-trained on the operation and
maintenance of the trowel.
Steering
Look at the operator control levers. Grasp the control levers
and move them around a bit. Observe how moving the
control levers cause the gearboxes and frame to move.
Notice the foot pedal which controls the engine and blade
speed. Also take a look at the main driveline of the trowel.
Take note and reference the drive belt aligment, this is the
way the belt should be aligned when adjusted properly.
Before using your trowel, test it on a flat watered down
section of finished concrete. This trial test run will increase
your confidence in using the trowel, and at the same time, it
will familiarize you with the trowel’s controls and indicators.
In addition, you will understand how the trowel will handle
under actual conditions.
This trowel is designed with two separate helical gearbox
assemblies that are enclosed in rugged cast aluminum
gear cases.
Dual control levers located in front of the operator’s seat
are provided for steering this trowel. The control levers are
linked to two spring loaded cylinders. In addition a steering
assist feature has been provided to make controlling of
the trowel easier especially when float pans are installed.
Push the left control lever forward and pull the right control
lever backward and the trowel will rotate clockwise on
approximately a center axis. Pull the left control lever
backward and push the right control lever forward and
the trowel will rotate counterclockwise. See Table 7 for
a complete description of the control levers’ directional
positioning.
Contstant Velocity Joints (CV-Joints)
Constant velocity joints insure the efficient transfer of power
to the drive shaft and maintains the timing of the gearboxes
without any chance of slippage.
Engine
Continuously Variable Transmission (CVT)
This trowel is equipped with a Briggs and Stratton Vanguard
air-cooled, V-twin big block, 35 HP gasoline engine. Refer
to the engine owner’s manual for specific instructions
regarding engine operation. This manual is included with the
trowel at the time of shipping. Please contact your nearest
Multiquip dealer should a replacement manual be required.
A Continuously Variable Transmission (CVT) has been
installed to obtain maximum drive torque.
This is accomplished by continually adjusting the drive
ratio to obtain optimum torque and speed during all phases
of finishing from low speed high torque to high speed
burnishing.
Blades
The blades of the towel finish the concrete as they are swirled
around the surface. Blades are classified as combination (10
or 8 inches wide) and finish (6 inches wide). This trowels is
equipped with five blades per rotor equally spaced in a radial
pattern and attached to a vertical rotating shaft by means of
a spider assembly.
page 16 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
general information
how it works
The Multi-Clutch functions much like a standard CVT
system. As the engine RPM’s increase, the drive or primary
clutch closes, forcing the belt to ride outwards on the drive
sheaves. The closing of the drive clutch also forces the belt
to open the driven or secondary sheaves. The opening and
closing of these sheaves creates a ratio variation… hence
CVT or Continuously Variable Transmission.
Belt protection is achieved within the Multi-Clutch through
the use of a series of centrifugal clutches. While most CVT
systems have a loose or slack belt while the engine idles,
the sheaves of those systems are constantly rotating and
wearing on the belt.
Those systems also require the stationary belt to be
pinched by the constantly rotating sheaves during startup.
The relative rotation of the sheaves to the belt causes
unnecessary wear on the belt. With traditional CVT
systems, wear on the belt happens any time the engine is
idling and at every start up of the driven equipment. This is
where the Multi-Clutch differs from the other CVT’s.
The Multi-Clutch utilizes two centrifugal clutches (the starter
clutch system) to drive the sheaves of the drive (primary)
clutch. What that means is that the belt can remain tight in
the sheaves, and that both the sheaves and the belt are
stationary while the vehicle is idling. This eliminates the belt
wear at an idle, and during start up, while also providing
one additional form of belt protection.
The centrifugal clutches (starter clutch) can act as overload
protection as well. In cases where too much torque is trying
to be transmitted to the belt, the centrifugals can slip before
the maximum load on the belt is achieved. What this means
is that instead of the belt slipping on the sheaves during
an overload, the centrifugals will first slip further protecting
the belt from damage.
Training
For training, please use the “TRAINING CHECKLIST”
located in the front of this manual. This checklist is not
intended to be a substitute for proper training but will provide
an outline for an experienced operator to provide training
to a new operator.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 17
components
3
4
0.0
HOURS
1/10
5
6
MC-6LC
www.LOFA.net
19
7
2
9
18
8
10
1
11
17
16 15
14
13
12
Figure 2. HHNG5 Components (Front)
1. Steering Control Lever (right-side) — Allows the unit
to move in either a forward, reverse left or right direction
2. Retardant Spray Control Buttons — When pressed
allows retardant spray to flow through the spray nozzle
located at the front of the machine.
3. Light Switch — When activated, turns on four halogen
lights. Lights offer better visibility when working indoors.
4. Hour Meter — Indicates number of hours the key
switch is in the "ON" position.
5. Ignition Switch — With key inserted turn clockwise
to start engine.
6. Oil, Temperature and Charge Indicator Display — Will
illuminate when oil pressure is low, high water temperature
or electrical system is not charging properly
7. Safety Stop Switch — Shuts down engine when
operator is not sitting in seat.
8. Seat — Provides comfortable position for operation of the
trowel. Engine will not start unless operator is seated. Seat
is adjustable, fore and aft for operator comfort.
9. Steering Control Lever (left-side) — Allows the unit to
move in either a forward, reverse left or right direction
10. Twin Pitch Control (Left) — Adjusts the blade pitch
for left side of the trowel. Turn the crank as marked on
its top surface to increase or decrease blade pitch.
11. Left Front Light — 55 watt, 12 VDC Hella™ halogen
light is provided for night time and indoor work.
12. Left Foot Riser — Operator foot rest pedal.
13. EZ- Mover Boss — Insertion point (left-front) for EZ
Mover. Used when the transporting of the trowel is
required.
14. Left-Front Spray Nozzle — Spray nozzle for retardant.
15. Right Foot Pedal — Controls blade speed. Slow blade
speed is accomplished by slightly depressing the foot
pedal. Maximum blade speed is accomplished by fully
depressing the foot pedal.
16. EZ- Mover Boss — Insertion point (right-front) for EZ
Mover. Used when the transporting of the trowel is
required.
17. Right-Front Spray Nozzle — Spray nozzle for retardant.
18. Right Front Light — 55 watt, 12 VDC Hella™ halogen
light is provided for night time and indoor work.
19. Twin Pitch Control (Right) — Adjusts the blade pitch
for right side of the trowel. Turn the crank as marked
on its top surface to increase or decrease blade pitch.
page 18 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
components
23
24
22
21
25
26
27
28
29
20
30
39
38
37
36
35
34
33
32
31
Figure 3. HHNG5 Components (Rear)
20. Left Rear Light — 55 watt, 12 VDC Hella™ halogen
light is provided for night time and indoor work.
21. Choke Knob — Used in the starting of a cold engine,
or in cold weather conditions. The choke enriches the
fuel mixture.
22. Left-Side Lift Loop — Attach a strap of adequate lifting
capacity to this loop when the trowel must be lifted.
23. Right-Side Lift Loop — Attach a strap of adequate
lifting capacity to this loop when the trowel must be
lifted onto a concrete slab.
24. Fuel Tank — Holds 5 gallons of fuel. Use unleaded fuel.
25. Fuel Gauge/Filler Cap — Indicates the amount of fuel
in the fuel tank. Remove this cap to add fuel.
26. Documentation Holder — Contains operation manual
and other documents relating to the trowel.
27. Charcoal Canister — A container filled with activated
charcoal that traps gasoline vapors emitted by the fuel
system.
28. Left Rear Light — 55 watt, 12 VDC Hella™ halogen
light is provided for night time and indoor work.
29. Engine — This trowel uses a Briggs ans Stratton,
Vanguard 35 HP gasoline engine.
30. Right and Left Side Retardant Spray Pumps —
Delivers retardant to the spray nozzles.
31. Right-Side Hydraulic Oil Sight Glass — Indicates
the level of the hydraulic oil in the right-side gear box.
32. Right-Side Spider — Consists (basic) of trowel arms,
blades, wear plate, and thrust collar etc.
33. EZ- Mover Boss — Insertion point (right-rear) for EZ
Mover. Used when the transporting of the trowel is
required.
34. Retardant Spray Tank — Holds 5 gallons of retardant.
35. Battery — Provides +12V DC power to the electrical system
36. EZ- Mover Boss — Insertion point (left-rear) for EZ
Mover. Used when the transporting of the trowel is
required
37. Belt Guard — Encloses drive belt used in conjunction
with clutch. Spare drive belt is also enclosed inside
this guard.
38. Left-Side Hydraulic Oil Sight Glass — Indicates the
level of the hydraulic oil in the left-side gear box.
39. Left-Side Spider — Consists (basic) of trowel arms,
blades, wear plate, and thrust collar etc.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 19
basic engine
Table 5.
3
10
12
4
11
10
9
2
1
5
13
2
8
7
14
6
7
Figure 4. Basic Engine Components
INITIAL SERVICING
The gasoline engine (Figure 4) must be checked for proper
lubrication and filled with fuel prior to operation. Refer to the
manufacturer’s engine manual for instructions and details
of operation and servicing.
1. Oil Pressure Sensor — Monitors engine oil pressure.
In the event of low oil pressure will shut down the
engine.
2. Side Spark Plug (2) — Provides spark to the ignition
system. Set spark plug gap to 0.030 inch (0.7 mm).
Clean spark plug once a week.
3. Air Filter — Prevents dirt and other debris from
entering the fuel system. Unsnap air filter cover to gain
access to filter element.
4. In-Line Fuel Filter — Filters fuel for contaminants.
5. Engine — Briggs and Stratton, Vanguard 35 HP, air
cooled, big block gasoline engine.
6. Engine Oil Cooler — Continously provides cool oil for
the lubricating system.
7. Oil Drain Plug (2) — Remove to drain crankcase
oil. Always dispose of used oil and oil filters in an
environmentally safe manner. DO NOT allow used oil
to drain onto the ground or into a water runoff drain.
8. Oil Filter — Spin-on type, filters oil for contaminants.
9. Engine Tag — Provides engine model identification
and information.
10. Lifting Bail (2) — When lifting of the engine is required
attach a strap or chain of adequate lifting capacity to
these lifting points.
11. Oil Filler Cap — Remove to add engine oil. Reference
Tables 4 and 6 when adding engine oil.
12. Oil Dip Stick — Remove to check amount and
condition of oil in crankcase.
13. Muffler — Used to reduce noise and emissions.
WARNING
Engine components can generate extreme
heat. To prevent burns, DO NOT touch
these areas while the engine is running or
immediately after operating. NEVER operate
the engine with the muffler removed.
14. Starter — Starts engine when ignition key is rotated
to the "START" position.
page 20 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
new machine setup
The purpose of this section is to assist the user in setting
up a NEW trowel. If your trowel is already assembled, (seat,
handles, knobs and battery), this section can be skipped.
4. Connect the "Engine Stop Switch" (seat) cable to the
mating plug as shown in Figure 5
NOTICE
ENGINE STOP
SWITCH
The new trowel cannot be placed into service until the
setup installation instructions are completed.
Before packaging and shipping, the this ride-on power
trowel was run and tested at the factory. If there are
problems, please let us know.
CONNECT
Control Handle Assembly
The steering control handles are not attached to the
trowel's two lower handles at the time of shipment. To
attach the steering control handles to the two lower handle
assemblies, perform the following:
1. Remove the bolts from the plastic bag tied to the
control towers.
2. Remove all protective wrapping and straps from the
control handles.
3. Slip the top (loose) piece into the base of the
corresponding handle, making sure to line up the holes.
4. Install the bolt through the lined up holes and tighten
the acorn nut onto the threaded end.
NOTICE
Some models are equipped with adjustable height
handles. Adjust the height by placing the bolt
through the set of holes that corresponds to the most
comfortable height.
5. Pay close attention to any wires that may be inside
the control handles. DO NOT pinch or cut any wires
during installation.
6. Inside the plastic bag of parts are two knobs for the
pitch control tower cranks. Install these two knobs onto
the tower crank levers.
Seat Assembly
The seat is not installed on the trowel for shipping purposes.
To attach the seat perform the following:
TO ENGINE
COIL
Figure 5. Engine Stop Switch (Seat)
battery setup
This trowel was shipped with a wet charged battery. This
battery may need to be charged for a brief period of time
as per the manufacturer instructions.
CAUTION
Use all safety precautions specified by the battery
manufacturer when working with the battery.
To install the battery on the trowel, make sure that the
battery is well seated in the battery box. The positive cable,
normally red, is associated with the "+" symbol on the
battery. The negative cable, normally black, is associated
with the "-" symbol on the battery. See Figure 6. Connect
the positive cable to the positive terminal on the battery
first, then connect the negative cable to the negative
terminal. Close the plastic battery box cover and secure
the battery box.
NEGATIVE
CABLE
(BLACK)
POSITIVE
CABLE
(RED)
1. Remove the seat from the protective wrapping.
2. Insert studs on bottom of seat through holes in the
mounting plate.
3. Install and tighten the provided nuts.
Figure 6. Battery Cable Orientation
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 21
inspection
This section is intended to assist the operator with the
initial inspection of the trowel. It is extremely important that
this section be read carefully before attempting to use the
trowel in the field.
DO NOT use your trowel until this section is thoroughly
understood.
CAUTION
Failure to understand the operation of the trowel could
result in severe damage to the trowel or personal injury.
See Figure 2 and Figure 3 for the location of any control
or indicator referenced in this manual.
gearbox oil level
1. Check the gearbox oil level in both gearboxes by
viewing the sight glass at the rear of the gearbox. See
Figure 8.
2. The oil level of the gear box should be at the half-way
point of the sight glass (Figure 8). The gear box oil
capacity is 1 U.S. gallon, (3.79 liters). If additional oil is
required, unscrew the oil fill plug located on top of the
gearbox, and refill with ISO 220 A GMA GR 5 EP oil.
FILL PLUG
Engine Oil Level
1. Pull the engine oil dipstick from its holder.
2. Determine if engine oil is low (Figure 7), add correct
amount of engine oil to bring oil level to a normal safe
level. (See Table 6).
SIGHT GLASS
(OIL CHECK)
DRAIN PLUG
Figure 8. Gearbox Oil Plugs/Sight Glass
fuel
ENGINE OIL
DIPSTICK
Determine if the engine fuel is low (Figure 9). If fuel level
is low, remove the fuel filler cap and fill with gasoline with
an minimum octane rating of 87.
SAFE OPERATING
OIL LEVEL
ADD ENGINE OIL
Figure 7. Engine Oil Dipstick
Table 6. Recommended Viscosity Grades
Figure 9. Fuel Gauge
DANGER
Handle fuel safely. Motor fuels are highly flammable
and can be dangerous if mishandled. DO NOT smoke
while refueling. DO NOT attempt to refuel the ride-on
trowel if the engine is hot or running.
CAUTION
AMBIENT TEMPERATURE
Never store the ride-on trowel with fuel in the tank for
any extended period of time. Always clean up spilled
fuel immediately.
page 22 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
operation
Starting the Engine
1. Place one foot on the trowel’s platform, grab ahold of
any part of the frame, lift yourself onto the trowel, then
sit down in the operator’s seat.
3. If starting a cold engine, pull the choke knob
(Figure 11) upward to the “CLOSED” position.
CHOKE
KNOB
CLOSED
(PULL)
NOTICE
This trowel is equipped with a safety stop switch that
will not allow the engine to start unless an operator is
sitting in the operator’s seat. The weight of an operator
depresses an electrical switch, which allows the engine
to start.
WARNING
NEVER disable or disconnect the safety stop switch. It is
provided for the operator’s safety, and injury may result
if it is disabled, disconnected or improperly maintained.
Figure 11. Choke Knob (Closed Position)
4. Insert the ignition key (Figure 12) into the ignition
switch.
OFF
ON
START
NOTICE
Using the safey stop switch to stop the engine after
every use will verify that the switch is working properly.
Remember to turn the key to the “OFF” position after
stopping the machine. Not doing so may drain the battery.
2. The right foot pedal (Figure 10) controls blade and
engine speed. The position of the foot pedal determines
the blade speed. Slow blade speed is obtained by
slightly depressing the pedal. Maximum blade speed
is obtained by fully depressing the pedal.
Figure 12. Ignition Switch
5. Turn the ignition key clockwise to the ON position. Aux1,
Aux 2, coolant temp and oil indicator lamps will light
for 10 seconds (Figure 12). Charge indicator lamp will
remain lit until engine starts.
Figure 13. Indicator Lights
Figure 10. Blade Speed Control Foot Pedal
NOTICE
The oil and charge, indicator lights come on when the
ignition switch is in the ON position, and the engine is
NOT running.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 23
operation
6. Keeping your foot OFF the right foot pedal, turn ignition
key fully clockwise and listen for engine to start. Once
engine has started release ignition key. The throttle
speed defaults to idle. Let the engine warm for a few
minutes.
NOTICE
The throttle will default to full speed when the right foot
pedal is depressed and operator presence is detected.
7. Once the engine has startred and been warmed, return
the choke knob (Figure 14) to the OPEN position.
CHOKE
KNOB
steering
Two control levers located in front of the operator’s seat
provide directional control for the trowel. Table 7 illustrates
the various directional positions of the joysticks and their
effect on the ride-on trowel.
NOTICE
All directional references with respect to the steering
control levers are from the operator’s seat position.
1. Push both the left and right control levers forward. See
Figure 15.
LEFT
CONTROL
LEVER
FORWARD
DIRECTION
OPEN
(PUSH)
RIGHT
CONTROL
LEVER
Figure 14. Choke Knob (Open Position)
8. If the engine fails to start in this manner, consult the
engine owner’s manual supplied with the trowel.
9. Test the safety stop switch by standing up briefly. The
switch under the seat should cause the engine to stop.
If the switch fails to shut down the engine, turn off the
engine with the key switch and fix the safety stop switch.
See Troubleshooting tables for possible problems.
10. Repeat this section a few times to get fully acquainted
with the engine starting procedure.
Figure 15. Left and Right Control Levers
2. With your right foot, quickly depress the right foot
pedal halfway. Notice that the ride-on power trowel
begins to move in a forward direction. Return both
joystick controls to their neutral position to stop forward
movement, then remove your right foot from the right
foot pedal.
3. Practice holding the machine in one place as you
increase blade speed. When about 75% of maximum
blade speed has been reached, the blade will be
moving at proper finishing speed. The machine may be
difficult to keep in one place. Trying to keep the ride-on
trowel stationary is a good practice for operation.
4. Practice maneuvering the ride-on trowel using the
information listed inTable 7. Try to practice controlled
motions as if you were finishing a slab of concrete.
Practice edging and covering a large area.
5. Try adjusting the pitch of the blades. This can be done
with the ride-on trowel stopped or while the trowel is
moving, whatever feels comfortable. Test the operation
of optional equipment like retardant spray and lights
if equipped.
page 24 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
operation
6. Push both the left and right joysticks backward and
repeat steps 3 through 6 while substituting the word
reverse for forward.
Table 7. Control Lever Directional Positioning
Control Lever
Left
Left
Right
Direction
Move Control Lever
Forward
Move Control Lever
Backward
Move Control Lever
Forward
Right
Move Control Lever
Backward
Left and Right
Move Both Control Levers
Forward
Left and Right
Move Both Control Levers
Backward
Left and Right
Left and Right
Move Both Control Levers
to the Right
Move Both Control Levers
to the Left
Results
Causes the ride-on trowel to
move forward and to the right.
Causes the ride-on trowel to
move backward and to the left.
Causes the ride-on trowel to
move forward and to the left.
Causes the ride-on trowel to
move backward and to the
right.
Causes the ride-on trowel to
move forward in a straight line.
Causes the ride-on trowel to
move backward in a straight
line.
Causes the ride-on trowel to
move to the right.
Causes the ride-on trowel to
move to the left
CAUTION
Trowel arms can be damaged by rough handling or by
striking exposed plumbing or forms while in operation.
ALWAYS look-out for objects which might cause
damage to the trowel arms.
Matching Blade Pitch for Both Sets of Blades
Trowels equipped with Twin PitchTM Controls may need
to have blade pitch between the two sets of blades
"syncronized". If the blades need to be syncronized this is
easily accomplished by performing the following:
1. Lift the pitch adjustment handle (Figure 16) on either
side. Once lifted, that side is now disconnected from
the Twin PitchTM system.
2. Adjust to match the opposite side.
3. When adjusted, lower the handle to Twin Pitch
operating position.
TM
CAUTION
When turning an adjustment handle, DO NOT force it
to turn or damage to the cable may occur. If the cable
starts to noticeably twist this is a good indication that
one side is either all ready at full pitch or it is bound up
due to concrete, debris, or corrosion.
DISENGAGED
(ONE SIDE)
OPERATING POSITION
Blade Pitch
Sometimes it may be necessary to match blade pitch
between the two sets of blades. There are some signs
that this may be necessary. For example, the differences
in pitch could cause a noticeable difference in finish quality
between the two sets of blades. Or, the difference in blade
pitch could make the machine difficult to control. This is
due to the surface area in contact with the concrete (the
blade set with the greater contact area tends to stick to the
concrete more).
Figure 16. Pitch Towers
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 25
maintenance
Table 8. Engine Maintenance Schedule
EVERY
EVERY 6
FIRST
BEFORE
YEAR
MONTHS
DESCRIPTION
MONTH OR
OPERATION
EACH
OR 300
OR 100
(3)
20 HRS.
USE
HRS.
HRS.
Check
X
Engine Oil
Change
X
X
Engine Oil Filter
Replace
Every 200 Hrs.
Check
X
Air Cleaner
Clean
X (1)
Change
Spark Plugs
Spark Arrester
Fuel Filter
Fuel Tube
Check/Adjust
EVERY 2
YEARS OR
500 HRS.
X (*)
X
Replace
Clean
Replace
Check
X
X
X (2)
Every 2 years (replace if necessary) (2)
* - Replace the paper filter element only.
(1) Service more frequently when used in DUSTY areas.
(2) These items should be serviced by your service dealer, unless you have the proper tools and are mechanically proficient.
Refer to the BRIGGS and STRATTON Shop Manual for service procedures.
(3) For commercial use, log hours of operation to determine proper maintenance intervals.
Table 9. Trowel Maintenance Schedule
Check Item
OPERATION
Relube arms, thrust collar, steering linkage
Remove clean, reinstall, and relube arms,
and thrust collar
Check and replace if necessary, arm
bushings and thrust collar bushings.
Check blades for excessive wear or
damage and replaces if necessary.
Adjust blade speed if necessary.
Gearbox lubricant)
Drive Belt
Fastners
Grease
Periodic Maintenance Interval
Every
DAILY Every Every
Every 500
100-125
25 Hrs 50 Hrs
Hrs
Hrs
X
Clean
X
Check
Check
Check
Replace
Check
Check
X
X
1st time
X
X
page 26 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
X
X
maintenance
When performing any maintenance on the trowel or engine,
follow all safety messages and rules for safe operation
stated at the beginning of this manual
At the front of this manual there is a “Daily Pre-Operation
Checklist”. Make copies of this checklist and use it on a
daily basis.
Air Cleaner
Thoroughly remove dirt and oil from the engine and
control area. Clean or replace the air cleaner elements as
necessary. Check and retighten all fasteners as necessary.
1. Unscrew the latch locking knob (Figure 17) located on
top of the air cleaner cover, and remove cover.
WARNING
Accidental starts can cause severe injury or
death.
ALWAYS place the ON/OFF switch in the
OFF position.
Disconnect and ground spark plug leads
and disconnect negative battery cable
from battery before servicing.
LOCKING KNOB
AIR CLEANER
COVER
RETAINER
NUT
OUTER FILTER
(FOAM)
INNER FILTER
(PAPER)
WARNING
Some maintenance operations may
require the engine to be run. Ensure
that the maintenance area is well
ventilated. Exhaust contains poisonous
carbon monoxide gas that can cause
unconsciousness and may result in
DEATH
Figure 17. Air Filter Components
2. Next, remove nut, outer (foam) and inner filters (paper).
3. Inspect both air filter elements, replace them if
necessary
CAUTION
ALWAYS allow the engine to cool
before servicing. NEVER attempt any
maintenance work on a hot engine.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 27
maintenance
Air Cleaner Cleaning
CAUTION
Wear protective equipment such as
approved safety glasses or face shields
and dust masks or respirators when
cleaning air filters with compressed air.
1. To clean the paper air filter (Figure 18), tap the filter
element several times on a hard surface to remove
dirt, or blow compressed air (not to exceed 30 psi
(207 kPa, 2.1 kgf/cm2) through the filter element from
the inside out.
INNER
FILTER
(PAPER)
Changing Engine Oil (100 Hours)
1. Drain the engine oil when the oil is warm as shown in
2. Remove the oil drain bolt and sealing washer and allow
the oil to drain into a suitable container.
SEAL
WASHER
DRAIN
BOLT
(REMOVE)
Figure 19. Draining Engine Oil
3. Reinstall drain bolt with sealing washer and tighten
securely.
4. Replace engine oil with recommended type oil as
listed in Table 4. For engine oil capacity, see Table 4.
DO NOT over fill.
Oil Filter (200 Hours)
Figure 18. Cleaning Inner Paper Filter
2. NEVER! try to brush off dirt; brushing will force dirt
into the fibers. If the paper element is excessively dirt,
replace element.
3. Clean the foam air filter element in warm soapy water,
rinse and allow to dry thoroughly. Or clean with a
nonflammable solvent and allow to dry. DO NOT pour
any type of oil into the foam element.
4. Wipe dirt from the inside of the air cleaner body and
cover, using a moist cloth. Be careful not to let any
dirt or debris to enter the air chamber that leads to
the carburetor.
1. Replace the engine oil filter (Figure 20) every 200 hours.
OIL
FILTER
SEAL
Figure 20. Oil Filter
2. Be sure to coat the seal of the new oil filter with clean
engine oil.
5. Place the foam air filter element back onto the paper
air filter element. Reinstall air cleaner and cover. Using
the locking knob, securely lock the air cleaner cover.
CAUTION
Operating the engine with a blocked grass screen, dirty or
plugged cooling fins, and/or cooling shrouds removed will
cause engine damage due to overheating.
page 28 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
maintenance
Fuel Filter (200 Hours)
1. Replace the fuel filter (Figure 21) every 200 hours.
FUEL
FILTER
8. When installing a new spark plug, tighten 1/2 turn, after
the spark plug seats, to compress the washer.
9. When reinstalling the original spark plug, tighten 1/8 1/4
turn after the spark plug seats to compress the washer.
10. Reattach the spark plug caps
Engine Tune-Up Engine
See your engine manual for specific information on tuning up
your engine, checking and gaping the spark plugs, etc.
NOTICE
Figure 21. Fuel Filter Location
Spark Plugs
See the engine manual supplied with your machine
for appropriate engine maintenance schedule and
troubleshooting guide for problems.
Long Term Storage
1. Make sure the engine is cool before servicing the
spark plugs.
„„Drain the fuel tank completely, or add STA-BIL to the fuel.
2. Disconnect the spark plug caps. Check for dirt and
remove any dirt from around the spark plug area.
„„Remove spark plug and pour a few drops of motor oil into
cylinder. Crank engine 3 to 4 times so that oil reaches
all internal parts.
3. Remove the spark plugs with a 5/8-inch spark plug
wrench.
„„Clean exterior with a cloth soaked in clean oil.
4. If the spark plugs are damaged, the sealing washer is
in poor condition, or if the electrode is worn, replace
the spark plugs.
„„Store unit covered with plastic sheet in moisture and
dust-free location out of direct sunlight.
5. Measure the spark plug electrode gap (Figure 22)
with a wire-type feeler gauge. If needed, adjust the
gap to .030 in. (0.76 mm), by carefully bending the
side electrode.
GAP
.030 IN.
(0.76 MM)
„„Remove the battery.
CAUTION
NEVER store the ride-on trowel with fuel in the tank for
any extended period of time. Always clean up spilled fuel
immediately.
Figure 22. Spark Plug Gap Adjustment
6. Install the spark plug carefully, by hand, to avoid cross
threading.
7. After the spark plug is seated, tighten with a 5/8-inch
spark plug wrench to compress the sealing washer.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 29
maintenance
Checking The Drive Belt
belt measurement
The drive belt needs to be changed as soon as it begins
to show signs of wear. DO NOT reuse a belt under any
circumstances. Indications of excessive belt wear are
fraying, squealing when in use, belts that emit smoke or a
burning rubber smell when in use.
Long life can be expected with this drive assembly as long
as the drive belt is kept properly aligned.
To gain access to the drive belt (Figure 23), remove the
drive belt guard cover, then visually inspect the drive belt
for signs of damage or excessive wear. If the drive belt is
worn or damaged, replace the drive belt.
The clutch will not shift correctly if the drive belt width is
below 1.14". Measure the CVT drive belt (Figure 24) every
100 hours of use to make sure it is within the specified
tolerance.
CVT BELT
OIL SOAKED
CALIPERS
CORD FAILURE
GLAZED
Figure 24. Belt Measurement
MISSING RUBBER
Removing the Drive Belt
11. Remove the retaining screws (4) that secure the drive
belt guard (Figure 25) to the trowel frame.
CRACKS
SIDEWALL
WEAR
Figure 23. Drive Belt Inspection
RETAINING
SCREWS (4)
WARNING
DRIVE
BELT GUARD
DO NOT attempt to insert hands or tools into
the drive belt area while the engine is running
and the safety guard has been removed.
Keep fingers, hands, hair and clothing away
from all moving parts to prevent bodily injury.
WARNING
DO NOT remove the drive belt guard cover
until the muffler has cooled. Allow the entire
trowel to cool down before performing this
procedure.
Figure 25. Drive Belt Guard Removal
page 30 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
maintenance
12. Disconnect the left-side CV Axle from the left-side gearbox
and the lower drive pulley coupler. See Figure 26.
NOTICE
2. Place free end of CVT belt (Figure 28) into upper
pulley grooves.
CLUTCH
Note that the 3 bolts securing the CV axle to the coupler
are shorter than those securing the CV axle to the
gearbox. Remember bolt orientation for reassembly.
UPPER
PULLEY
UPPER DRIVE
PULLEY/CLUTCH
CVT
BELT
SHORTER
SCREWS (3)
LEFT-SIDE
GEARBOX
COUPLER
CV AXLE
LOWER
DRIVE
PULLEY
GEARBOX
COUPLER
LOWER
PULLEY
Figure 28. Upper Pulley Belt Installation
Figure 26. Remove Left-Side CV Axle
13. If the belt is not being reused (recommended), CUT
the drive belt. Ensure all belt remnants are removed
from the pulleys.
Installing Drive Belt
1. Place new CVT belt over the lower pulley. Squeeze the
belt (Figure 27) and pull the belt upwards and towards
the rear of the trowel. This will spread open the faces
of the lower drive pulley.
3. Apply a thin coat of RVT silicone to mating surfaces
ofthe CV-joint (Figure 29) and left-side gearbox coupler.
APPLY SILICONE
TO CV-JOINT
MATING SURFACES
RTV
SILICONE
Figure 29. Applying RTF Silicone
CVT BELT
(P/N 23365)
4. Reconnect the CV-joint to the left-side geaxbox coupler.
5. Re-install drive belt guard onto frame. Secure with
retaining screws (4).
PULL UPWARDS
AND TOWARDS
REAR OF TROWEL
FIXED
FACE
MOVEABLE
FACE
LOWER
PULLEY
Figure 27. Holding Lower Pulley Open
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 31
maintenance
Blade Pitch Adjustment Procedure
Maintenance adjustment of blade pitch is made by adjusting
a bolt (Figure 30) on the arm of the trowel blade finger.
This bolt is the contact point of the trowel arm to the lower
wear plate on the thrust collar. The goal of adjustment is to
promote consistent blade pitch and finishing quality.
Look for the following indications if blades are wearing
unevenly. If so, adjustment may be necessary.
„„Is one blade completely worn out while the others look
new?
„„Does the machine have a perceptible rolling or bouncing
motion when in use?
„„Look at the machine while it is running, do the guard
rings “rock up and down” relative to the ground?
„„Do the pitch control towers rock back and forth?
SPIDER PLATE
TROWEL LEVER (FINGER)
TROWEL ARM
BLADE PITCH
ADJUSTMENT BOLT
Figure 30. Blade Pitch Adjustment Bolt
The easiest and most consistent way to make adjustments
on the trowel arm fingers is to use the Trowel Arm Adjustment
Fixture (P/N 9177). It comes with all the hardware necessary
to properly accomplish this maintenance and instructions
on how to utilize this tool.
If a trowel arm adjustment fixture is not available and
immediate adjustment is necessary, temporary field
adjustment can be made if you can see or feel which blade
is pulling harder by adjusting the bolt that corresponds to
that blade.
A better way to determine which blades need adjustment
is to place the machine on a known FLAT surface (steel
metal plate) and pitch the blades as flat as possible. Look
at the adjustment bolts. They should all barely make contact
with the lower wear plate on the spider. If you can see that
one of them is not making contact, some adjustment will
be necessary.
Adjust the “high” bolts down to the level of the one that is not
touching, or adjust the “low” bolt up to the level of the higher
ones. If possible, adjust the low bolt up to the level of the
rest of the bolts. This is the fastest way, but may not always
work. Verify after adjustment the blades pitch correctly.
Blades that are incorrectly adjusted often will not be able
to pitch flat. This can occur if the adjusting bolts are raised
too high. Conversely, adjusting bolts that are too low will
not allow the blades to be pitched high enough for finishing
operations.
If, after making Blade Pitch adjustments, the machine is
still finishing poorly, blades, trowel arms, and trowel arm
bushings may be suspect and should be looked at for
adjustment, wear, or damage. See the following sections.
Changing Blades
It is recommended that ALL the blades on the entire
machine are changed at the same time. If only one or
some of the blades are changed, the machine will not
finish concrete consistently and the machine may wobble
or bounce.
1. Place the machine on a flat, level surface. Adjust
the blade pitch control to make the blades as flat as
possible. Note the blade orientation on the trowel arm.
This is important for ride-on trowels as the two sets
of blades counter-rotate. Lift the machine up, placing
blocks under the main guard ring to support it.
2. Remove the bolts and lock washers on the trowel arm,
and then remove the blade.
3. Scrape all concrete and debris from the trowel arm.
This is important to properly seat the new blade.
4. Install the new blade, maintaining the proper orientation
for direction of rotation.
5. Reinstall the bolts and lock washers.
6. Repeat steps 2-5 for all remaining blades.
Clean-Up
Never allow concrete to harden on the power trowel.
Immediately after use wash any concrete off the trowel
with water, be careful not to spray a hot engine or muffler.
An old paint brush or broom may help loosen any concrete
that has started to harden.
page 32 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
maintenance
Trowel Arm Adjustment
Figure 32 illustrates the “correct alignment” for a spider
plate (as shipped from the factory).
NOTICE
The following procedure should be followed to adjust
trowel arms when it becomes apparent that the trowel
is finishing poorly or in need of routine maintenance.
GEARBOX
TROWEL
ARM
CORRECT
ALIGNMENT
MOUNTING BAR
BLADE
A level, clean area to test the trowel prior to and after is
essential. Any unlevel spots in the floor or debris under the
trowel blades will give an incorrect perception of adjustment.
Ideally, a 5' x 5' three-quarters inch thick, flat steel plate
should be used for testing.
Some indications of poor concrete finishing is incorrect
trowel arm alignment, worn spider bushings or bent trowel
arms:
Does your trowel exhibit the following?
„„Are blades wearing unevenly? Is one blade completely
worn out while the others look new?
„„Look at the machine while it is running. Do the guard
rings “rock up and down” relative to the ground?
„„Does the machine have a perceptible rolling or bouncing
motion when in use?
1. To determine which blades need adjustment, place the
trowel in the test area (three-quarter inch thick plate)
and look for the following conditions:
2. Pitch the blades as flat as possible. The adjustment
bolts should all barely make contact with the lower
wear plate on the spider. If one is not making contact,
adjustment will be necessary (Figure 31).
SURFACE
Figure 32. Correct Spider Plate Alignment
Spider Removal
Remove the spider assembly from the gearbox shaft as
follows:
1. Locate the cone point square head set screw (Figure
33) and attached jam nut found on the side of the
spider assembly.
2. Loosen the jam nut and cone point square head set
screw.
3. Carefully lift the upper trowel assembly off of the spider
assembly. A slight tap with a rubber mallet may be
necessary to dislodge the spider from the main shaft
of the gearbox.
4. For reassembly apply Blue Loctite #242 to the spider
retaining screw and torque to 130 ft.-lbs. (176 N.m)
Gearbox Shaft
Figure 31 illustrates “incorrect alignment,” worn spider
bushings or bent trowel arms. Check that the adjustment
bolt is barely touching (0.10" max. clearance) lower wear
plate. All alignment bolts should be spaced the same
distance from the lower wear plate.
.
Upper Wear Plate
Thrust Collar Bearing
Thrust Collar
Thrust Collar Bushing
Lower Wear Plate
Spider Plate
ADJUSTMENT BOLT
“DISHED”
EFFECT ON
FINISHED
CONCRETE
LOWER
WEAR PLATE
Retainer
Lock Washer
Retaining Screw
SURFACE
Figure 31. Incorrect Spider Plate Alignment
Plug
Figure 33. Spider Removal
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 33
maintenance
Trowel Blade Removal
3. Remove the trowel arm from the spider plate.
Remove the trowel blades by removing the three hex head
bolts (Figure 34) from the trowel arm. Set blades aside.
2-PIECE
BRONZE
BUSHING
HEX HD.SCREW
TROWEL
ARM
HEX HEAD
BOLT
LOCK
WASHER
TROWEL
BLADE
HEX JAM NUT
LOCK
WASHER
ARM
LEVER
ROLL PIN
SPIDER
PLATE
RETAINING SCREW
(GREASE FITTING)
ARM
RETURN
SPRING
TROWEL ARM
Figure 36. Remove Roll Pin and Zerk Fitting
Figure 34. Trowel Blade Removal
Trowel arm removal
1. Remove the hardware securing the stabilizer ring to
the trowel arm. (Figure 35)
4. Should the trowel arm inserts (bronze bushing) come
out with the trowel arm, remove the bushing from the
trowel arm and set aside in a safe place. If the bushing
is retained inside the spider plate, carefully remove
the bushing.
5. Examine the bronze trowel arm bushings (Figure 37),
and clean if necessary. Replace bushing if out-of-round
or worn.
2-PIECE
BRONZE
BUSHINGS
TROWEL
ARM
NUT
NUT
STABILIZER
RING
FLAT
WASHER
ROD END
BOLT
Figure 35. Stabilizer Ring
(Stabilizer Ring)
2. Each trowel arm is held in place at the spider plate
(Figure 36) by a hex head bolt (zerk grease fitting) and
a roll pin. Remove both the hex head bolt and the roll
pin from the spider plate.
Figure 37. Bronze Bushings
6. Wire brush any build-up of concrete from all six sides
of the trowel arm. Repeat this for the remaining arms.
Checking Trowel Arm Straightness
Trowel arms can be damaged by rough handling, (such as
dropping the trowel on the pad), or by striking exposed
plumbing, forms, or rebar while in operation. A bent trowel
page 34 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
maintenance
arm will not allow the trowel to operate in a smooth fluid
rotation. If bent trowel arms are suspect, check for flatness
as shown below. Reference Figure 39:
Lever Mounting Slot
(Left Arm Shown)
Roll Pin Hole
Blade Attachment
Bolt Hole (1 of 3)
Flat of Hexagonal-Shaft
(Top of Arm)
Trowel Arm
Round Shaft Section
Trowel Arm
Hex-Shaft Section
Trowel Arm Adjustment
Shown in (Figure 40) is the adjustment fixture with a trowel
arm inserted. As each trowel arm is locked into the fixture,
the arm bolt is adjusted to where it contacts a stop on the
fixture. This will consistently adjust all of the trowel arms,
keeping the finisher as flat and evenly pitched as possible.
1. Locate the trowel arm adjustment tool P/N 9177.
ADJUSTMENT
BOLT
“DISTANCE”
FIXTURE
ARM
Figure 38. Trowel Arm
1. Use a thick steel plate, granite slab or any surface
which is true and flat, to check all six sides of each
trowel arm for flatness.
2. Check each of the six sides of the trowel arm (hex
section). A feeler gauge of .004" (0.10 mm) should not
pass between the flat of the trowel arm and the test
surface along its length on the test surface. (Figure 39) .
TROWEL
ARM
FEELER GAUGE
(.005 in./0.127 mm)
LOCKING
NUT
SIDE VIEW
Figure 40. Trowel Arm Adjustment Tool Side View
2. Ensure the fixture arm is in the proper setting (up or down)
for your trowel arm rotation as shown in Figure 41.
FLAT
TEST
SURFACE
FEELER GAUGE
(.004 in./0.10 mm)
Figure 39. Checking Trowel Arm Flatness
3. Next, check the clearance between the round shaft and
the test surface as one of the flat hex sections of the
arm rests on the test surface. Rotate the arm to each
of the flat hex sections and check the clearance of the
round shaft. Use a feeler gauge of .005" (0.127 mm).
Each section should have the same clearance between
the round of the trowel arm shaft and the test surface.
4. If the trowel arm is found to be uneven or bent, replace
the trowel arm.
Figure 41. Trowel Arm Adjustment Setup
NOTICE
Arms with CLOCK-WISE blade rotation use the fixture
arm in the UP position (Figure 41A). Arms with COUNTER
CLOCK-WISE blade rotation use the fixture with the fixture
arm in the DOWN position (Figure 41B).
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 35
maintenance
3. Unscrew the locking bolts on the adjustment tool and
place the trowel arm into the fixture channel as shown
in Figure 42. A thin shim may be required to cover the
blade holes on the trowel arm. Make sure to align the
trowel adjustment bolt with the fixture adjustment bolt.
ARM
TROWEL
ARM
FIXTURE
LEVER ARM
ADJUSTMENT
BOLT
SHIM
LOCKING
BOLTS
DISTANCE =
.010 in.
TROWEL ARM
ADJUSTMENT
FIXTURE
ADJUSTMENT
BOLT
Figure 42. Trowel Arm Adjustment Fixture
Components
4. Use an allen wrench to tighten the locking bolts
securing the trowel arm in place.
5. Adjust the bolt “distance” shown in Figure 42 to match
one of the arms. The other arms will be adjusted to
match this distance.
6. Loosen the locking nut on the trowel arm lever, then
turn the trowel arm adjusting bolt until it barely touches
(.010") the fixture adjusting bolt.
7. Once the correct adjustment is made, tighten the lock
nut on the trowel arm to lock in place.
Reassembly
1. Clean and examine the upper/lower wear plates and
thrust collar. Examine the entire spider assembly. Wire
brush any concrete or rust build-up. If any of the spider
components are found to be damaged or out of round,
replace them.
2. Make sure that the bronze trowel arm bushing is not
damage or out of round. Clean the bushing if necessary.
If the bronze bushing is damaged or worn, replace it.
3. Reinstall bronze bushing onto trowel arm.
4. Repeat steps 2–3 for each trowel arm.
5. Make sure that the spring tensioner is in the correct
position to exert tension on the trowel arm.
6. Insert all trowel arms with levers into spider plate (with
bronze bushing already installed) using care to align
grease hole on bronze bushing with grease hole fitting
on spider plate.
7. Lock trowel arms in place by tightening the hex head
bolt with zerk grease fitting and jam nut.
8. Re-install the blades onto the trowel arms.
9. Install stabilizer ring onto spider assembly.
10. Lubricate all grease points (zerk fittings) with premium
“Lithum 12” based grease, conforming to NLG1 Grade
#2 consistency.
8. Loosen locking nuts on the adjustment fixture, and
remove trowel arm.
9. Repeat steps for the remaining trowel arms.
page 36 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
maintenance
Installing Pans Onto Finisher Blades
These round discs sometimes referred to as "pans" attach
to the spiders arms and allow early floating on wet concrete
and easy movement from wet to dry areas. They are also
very effective in embedding large aggregates and surface
hardeners.
WARNING
Lifting/Crush Hazard. DO NOT lift trowel with
pans attached.
WARNING
ALWAYS install pans either on the work area or on an
area that is next to and level with the work area. DO NOT
lift thetrowel when the pans are attached.
Refer to Figure 43 when installing pans onto finisher blades.
KNOB, TIE-DOWN
Z-CLIP PANS
TIE-DOWN,
BLADE
Z-CLIP,
PAN
BLADE
ASSEMBLY
Figure 43. Z-Clip Finisher Pan Installation
1. Lift trowel just enough to slide pan under blades. Lower
finisher onto pan with blades adjacent to Z-Clips.
2. Rotate blades into position under Z-Clips. Ensure that
the blades are rotated in the direction of travel when
the machine is in operation or use the engine to rotate
the blades into position.
3. Attach the blade tie-downs to the far side of the Z-Clip
brackets with tie-down knobs as shown in Figure 43.
4. Check to make certain that the blade edges are
secured under the Z-Clips and the tie-downs are
secured completely over the edges of the blade bar
before the machine is put back into operation.
Decommissioning Trowel/Components
Decommissioning is a controlled process used to safely
retire a piece of equipment that is no longer serviceable.
If the equipment poses an unacceptable and unrepairable
safety risk due to wear or damage or is no longer cost
effective to maintain, (beyond life-cycle reliability) and is
to be decommissioned, (demolition and dismantlement),
the following procedure must take place:
1. Drain all fluids completely. These may include oil,
gasoline, hydraulic oil and antifreeze. Dispose of
properly in accordance with local and governmental
regulations. Never pour on ground or dump down
drains or sewers.
2. Remove battery and bring to appropriate facility for lead
reclamation. Use safety precautions when handling
batteries that contain sulfuric acid.
3. The remainder can be brought to a salvage yard or
metal reclamation facility for further dismantling.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 37
troubleshooting (trowel)
Troubleshooting (Ride-On mechanical Trowel)
Symptom
Engine running rough or not at all.
Safety stop switch not functioning.
Possible Problem
Stop switch malfunction?
Make sure that the stop switch is functioning when the
operator is seated. Replace switch if necessary.
Fuel?
Look at the fuel system. Make sure there is fuel being
supplied to the engine. Check to ensure that the fuel
filter is not clogged.
Ignition?
Check to ensure that the ignition switch has power and
is functioning correctly.
Bad contacts?
Replace switch.
Loose wire connections?
Check wiring. Replace as necessary.
Other problems?
Consult engine manufacturer’s manual.
Blades?
Make sure blades are in good condition, not excessively
worn. Finish blades should measure no less than 2
inches (50mm) from the blade bar to the trailing edge,
combo blades should measure no less that 3.5 inches
(89mm). Trailing edge of blade should be straight and
parallel to the blade bar.
Pitch Adjustment?
Check that all blades are set at the same pitch angle
as measured at the spider. A field adjustment tool
is available for height adjustment of the trowel arms
(contact Parts Department).
Bent trowel arms?
Check the spider assembly for bent trowel arms. If one
of the arms is even slightly bent, replace it immediately.
Trowel arm bushings?
Check the trowel arm bushings for tightness. This can
be done by moving the trowel arms up and down. If
there is more than 1/8 inch (3.2 mm) of travel at the
tip of the arm, the bushings should be replaced. All
bushings should be replaced at the same time.
Thrust collar?
Check the flatness of the thrust collar by rotating it on
the spider. If it varies by more than 0.02 inch (0.5 mm)
replace the thrust collar.
Thrust collar bushing?
Check the thrust collar by rocking it on the spider. If it
can tilt more than 1/16 inch (1.6 mm) - as measured at
the thrust collar O.D., replace the bushing in the thrust
collar.
Thrust bearing worn?
Check the thrust bearing to see that it is spinning freely.
Replace if necessary.
Main shaft?
The main output shaft of the gearbox assembly should
be checked for straightness. The main shaft must run
straight and cannot be more than 0.003 inch (0.08 mm)
out of round at the spider attachment point.
Yoke?
Check to make sure that both fingers of the yoke press
evenly on the wear cap. Replace yoke as necessary.
Blade Pitch?
Check to ensure that each blade is adjusted to have the
same pitch as all other blades. Adjust per maintenance
section in manual.
Trowel bounces, rolls concrete, or makes uneven
swirls in concrete.
Machine has a perceptible rolling motion while
running.
Solution
page 38 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
troubleshooting (trowel)
Troubleshooting (Ride-On mechanical Trowel) - continued
Symptom
Lights (optional) not working.
Retardant spray (optional) not working.
Steering is unresponsive.
Operating position is uncomfortable.
Power head on Electric Pitch (optional) not
working.
Linkage on Twin Pitch not working.
Clutch slipping or sluggish response to engine
speed change.
Possible Problem
Solution
Wiring?
Check all electrical connections in the lighting circuit.
Verify wiring is in good condition with no shorts. Replace
defective wiring or components immediately.
Lights?
If +12VDC is present at light fixture connector when light
switch is activated and light does not turn on, replace
light bulb.
Bad switch?
Check the continuity of light switch. Replace light switch
if defective.
Bad fuse?
Check fuse. Replace fuse if defective.
Retardant?
Check retardant level in tank. Fill tank as required.
Wiring?
Check all electrical connections in the spray pump
circuit. Verify wiring is in good condition with no shorts.
Replace defective wiring or components immediately.
Bad switch?
Check the continuity of both left and right spray switches
(palm handles). Replace spray switch if defective..
Bad spray pump?
If +12VDC is present at pump connector when spray
switch is activated and pump does not operate, replace
spray pump.
Bad fuse?
Check fuse. Replace fuse if defective.
Blade speed out of adjustment?
See section on blade speed adjustment.
Steering linkage out of adjustment?
Adjust the connecting linkage found at the base of the
handle. Contact your MQ field service manager for
instructions.
Worn components?
Check for wear of steering bearings and linkage
components. Replace if necessary.
Seat adjusted for operator?
Adjust seat with lever located on the front of the seat.
Broken or loose parts?
If the motor runs and the pitch is not affected, parts
inside the power head may be loose or broken. Return
power head to dealer for service.
Wiring?
Check all electrical connections and wiring. Check the
continuity at the power head unit. Verify that there is
voltage present at the power head switch with the key
switch in the “on” position.
Switch?
Check the continuity of the switch. If switch is
malfunctioning, replace immediately.
Crank handles?
Make sure that both crank handles are pushed down as
far as possible to ensure that the linkage is engaged.
Broken part?
Replace all broken parts immediately.
Worn belts?
Replace belt.
Clutch out of adjustment?
Adjust per instructions in maintenance section of this
manual.
Worn or defective clutch parts?
Replace parts as necessary.
Worn bearings in gearbox?
Rotate input shaft by hand. If shaft rotates with difficulty,
check the input and output shaft bearings. Replace as
necessary.
Worn or broken gears in gearbox?
Verify that the gearbox shaft rotates when the input shaft
is rotated. Replace both the worm and worm gear as a
set.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 39
troubleshooting (engine)
Troubleshooting (engine)
Symptom
Engine will not start or start is delayed,
although engine can be turned over.
At low temperatures engine will not start.
Engine fires but stops soon as starter is
switched off.
Engine stops by itself during normal
operation.
Low engine power, output and speed.
Possible Problem
Solution
No Fuel reaching injection pump?
Add fuel. Check entire fuel system.
Defective fuel pump?
Replace fuel pump.
Fuel filter clogged?
Replace fuel filter and clean tank.
Faulty fuel supply line?
Replace or repair fuel line.
Compression too low?
Check piston, cylinder and valves. Adjust or
repair per engine repair manual.
Fuel pump not working correctly?
Repair or replace fuel pump.
Oil pressure too low?
Check engine oil pressure.
Low starting temperature limit exceeded?
Comply with cold starting instructions and
proper oil viscosity.
Defective battery?
Charge or replace battery.
Air or water mixed in fuel system?
Check carefully for loosened fuel line
coupling, loose cap nut, etc.
Engine oil too thick?
Refill engine crankcase with correct type of
oil for winter environment.
Defective battery?
Replace battery.
Fuel filter blocked?
Replace fuel filter.
Fuel supply blocked?
Check the entire fuel system.
Defective fuel pump?
Replace fuel pump.
Fuel tank empty?
Add fuel.
Fuel filter blocked?
Replace fuel filter.
Defective fuel pump?
Replace fuel pump.
Mechanical oil pressure shutdown sensor
stops the engine due to low oil?
Add oil. Replace low oil shutdown sensor if
necessary.
Fuel tank empty?
Replace fuel filter.
Fuel filter clogged?
Replace fuel filter.
Fuel tank venting is inadequate?
Ensure that tank is adequately vented.
Leaks at pipe unions?
Check threaded pipe unions tape and tighten
unions a required.
Speed control lever does not remain in
selected position?
See engine manual for corrective action.
Engine oil level too full?
Correct engine oil level.
Injection pump wear?
Use No. 2-D diesel fuel only. Check the fuel
injection pump element and delivery valve
assembly and replace as necessary.
page 40 — HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13)
troubleshooting (engine)
Troubleshooting (engine) - continued
Symptom
Low engine power output and low speed,
black exhaust smoke.
Engine overheats.
Possible Problem
Solution
Air filter blocked?
Clean or replace air filter.
Incorrect valve clearances?
Adjust valves per engine specification.
Malfunction at injector?
See engine manual.
Too much oil in engine crankcase?
Drain off engine oil down to uppermark on
dipstick.
Entire cooling air system contaminated/
blocked?
Clean cooling air system and cooling fin
areas.
Fan belt broken or elongated?
Change belt or adjust belt tension.
Coolant insufficient?
Replenish coolant.
Radiator net or radiator fin clogged with dust? Clean net or fin carefully.
Fan, radiator, or radiator cap defective?
Replace defective part.
Thermostat defective?
Check thermostat and replace if necessary.
Head gasket defective or water leakage?
Replace parts.
HHNG5 RIDE-ON TROWEL • operation manual — rev. #0 (07/16/13) — page 41
Operation Manual
HERE’S HOW TO GET HELP
PLEASE HAVE THE MODEL AND SERIAL
NUMBER ON-HAND WHEN CALLING
United StateS
Multiquip Corporate Office
18910 Wilmington Ave.
Carson, CA 90746
Contact: mq@multiquip.com
MQ Parts Department
Tel. (800) 421-1244
Fax (310) 537-3927
Service Department
800-421-1244
310-537-3700
800-427-1244
310-537-3700
Fax: 800-672-7877
Fax: 310-637-3284
Warranty Department
Fax: 310-537-4259
800-421-1244
310-537-3700
Fax: 310-943-2249
Technical Assistance
800-478-1244
Fax: 310-943-2238
mexico
United Kingdom
MQ Cipsa
Multiquip (UK) Limited Head Office
Carr. Fed. Mexico-Puebla KM 126.5
Momoxpan, Cholula, Puebla 72760 Mexico
Contact: pmastretta@cipsa.com.mx
Tel: (52) 222-225-9900
Fax: (52) 222-285-0420
Unit 2, Northpoint Industrial Estate,
Globe Lane,
Dukinfield, Cheshire SK16 4UJ
Contact: sales@multiquip.co.uk
Tel: 0161 339 2223
Fax: 0161 339 3226
Canada
Multiquip
4110 Industriel Boul.
Laval, Quebec, Canada H7L 6V3
Contact: jmartin@multiquip.com
Tel: (450) 625-2244
Tel: (877) 963-4411
Fax: (450) 625-8664
© COPYRIGHT 2013, MULTIQUIP INC.
Multiquip Inc, the MQ logo and the Whiteman logo are registered trademarks of Multiquip Inc. and may not be used, reproduced, or altered without written permission. All other
trademarks are the property of their respective owners and used with permission.
This manual MUsT accompany the equipment at all times. This manual is considered a permanent part of the equipment and should remain with the unit if resold.
The information and specifications included in this publication were in effect at the time of approval for printing. Illustrations, descriptions, references and technical data contained in
this manual are for guidance only and may not be considered as binding. Multiquip Inc. reserves the right to discontinue or change specifications, design or the information published
in this publication at any time without notice and without incurring any obligations.
Your Local Dealer is:
PN: 30039