Multiquip HHN31VTCSL5 User Manual
OPERATION AND PARTS MANUAL
SERIES
MODEL HHN31VTCSL5
RIDE-ON POWER TROWEL
(B & S VANGUARD DM950 GASOLINE ENGINE)
Revision #8 (05/03/12)
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: 20382
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.
Crystallinesilicafrombricks.
Cementandothermasonryproducts.
Arsenicandchromiumfrom chemically
treatedlumber.
Your risk from these exposures varies,
dependingonhowoftenyoudothistype
of work. To reduce your exposure to
these chemicals: work in aALWAYS
well ventilated area, and work with
approved safety equipment, such as
dust masks that are specially designed
to filter out microscopic particles.
PAGE 2 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
SILICOSIS/RESPIRATORY WARNINGS
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.
WARNING
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.
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 3
TABLE OF CONTENTS
HHN31VTCSL5 Ride-On
Power Trowel
Proposition 65 Warning ........................................... 2
Silicosis/Respiratory Warnings ................................ 3
Table Of Contents .................................................... 4
Parts Ordering Procedures ...................................... 5
Training Checklist .................................................... 6
Daily Pre-Operation Checklist ................................. 7
Safety Information ..............................................8-13
Specifications/Dimensions ................................ 14-15
General Information ............................................... 16
Components ..................................................... 18-19
New Machine Setup .............................................. 20
Basic Engine .......................................................... 21
Inspection .............................................................. 22
Operation .......................................................... 23-24
Maintenance ..................................................... 25-41
Maintenance (Old Style Clutch) ...................... 28-32
Maintenance (New Style Clutch) .................... 33-35
Troubleshooting ..................................................... 42
Troubleshooting ..................................................... 43
Troubleshooting ..................................................... 44
Troubleshooting ..................................................... 45
Wiring Diagram ...................................................... 46
Explanation Of Code In Remarks Column............. 48
Suggested Spare Parts ......................................... 49
NOTICE
Component Drawings
Nameplates And Decals ................................... 50-51
Pivot/Gearbox (Right Side) Assembly. .............. 52-53
Pivot/Gearbox (Left Side) Assembly. ................54-55
Gearbox Assembly. ........................................... 56-59
Control Steering (Assist) 1 Assembly. ..............60-61
Control Steering (Assist) 2 Assembly. ..............62-63
Twin Pitch Assembly. 1 (Left/Right) ................... 64-65
Twin Pitch Assembly. 2 (Left/Right) ................... 66-67
Engine Mounting & Throttle Assembly. ............. 68-69
Engine Cradle Mounting Assembly. .................. 70-71
Engine Air Cleaner/Radiator Assembly. ............ 72-73
Engine Muffler Assembly. ................................. 74-75
Engine Clutch Assembly. (Old Style) ................ 76-77
Engine Clutch Assembly. (New Style) ............... 78-79
Engine Fuel Assembly. ..................................... 80-81
Drive Assembly. (Old Style) .............................. 82-83
Drive Assembly. (New Style) ............................. 84-85
Spider Assembly. (Left) ..................................... 86-87
Spider Assembly. (Right) .................................. 88-89
Stabilizer Ring Assembly. ................................ 90-91
Seat And Frame Assembly. .............................. 92-93
Frame And Components ...................................94-95
Foot Pedals Assembly. ...................................... 96-97
Throttle Foot Pedal Assembly. .......................... 98-99
Battery Assembly. ......................................... 100-101
Spray Assembly. ........................................... 102-103
Front Panel Assembly. .................................. 104-105
Top Right Panel Assembly. ........................... 106-107
E-Z Mover And Lift Handle Assembly. .......... 108-109
Specifications and part numbers are subject to change
without notice.
PAGE 4 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
Terms And Conditions Of Sale — Parts .............. 110
PARTS ORDERING PROCEDURES
Ordering parts has never been easier!
If you have an MQ Account, to obtain a Username
Effective:
Choose from three easy options:
January 1st, 2006
Best Deal!
Order via Internet (Dealers Only):
Order parts on-line using Multiquip’s SmartEquip website!
■ View Parts Diagrams
■ Order Parts
■ Print Specifi cation Information
Goto www.multiquip.com and click on
Order Parts
to log in and save!
Order via Fax (Dealers Only):
All customers are welcome to order parts via Fax.
Domestic (US) Customers dial:
1-800-6-PARTS-7 (800-672-7877)
Order via Phone:
Non-Dealer Customers:
Contact your local Multiquip Dealer for
parts or call 800-427-1244 for help in
locating a dealer near you.
and Password, E-mail us at: parts@multiquip.
com.
To ob ta in an MQ Account , contac t yo ur
District Sales Manager for more information.
Use the internet and qualify for a 5% Discount
on Standard orders for all orders which include
complete part numbers.*
Fax your order in and qualify for a 2% Discount
on Standard orders for all orders which include
complete part numbers.*
Domestic (US) Dealers Call:
1-800-427-1244
International Customers should contact
their local Multiquip Representatives for
Parts Ordering information.
Note: Discounts Are Subject To Change
Note: Discounts Are Subject To Change
When ordering parts, please supply:
❒ Dealer Account Number
❒ Dealer Name and Address
❒ Shipping Address (if different than billing address)
❒ Return Fax Number
❒ Applicable Model Number
❒ Quantity, Part Number and Description of Each Part
NOTICE
All orders are treated as Standard Orders and will
ship the same day if received prior to 3PM PST.
❒ Specify Preferred Method of Shipment:
✓ UPS/Fed Ex ✓ DHL
■ Priority One ✓ Truck
■ Ground
■ Next Day
■ Second/Third Day
www.multiquip.com
WE ACCEPT ALL MAJOR CREDIT CARDS!
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 5
TRAINING CHECKLIST
Training Checklist
No, Description OK? Date
1
2
3 Fuel system, refueling procedure.
4 Operation of spray and lights.
5
6
7 Emergency stop procedures.
8
9 Maintaining a hover.
10 Maneuvering.
11 Pitching.
12 Matching blade pitch. Twin-Pitch™
Read operation manual
completely.
Machine layout, location of
components, checking of engine
oil levels.
Operation of controls (machine
not running).
Safety controls, safety stop switch
operation.
Startup of machine, pre-heat,
engine choke.
13 Concrete fi nishing techniques.
14 Shutdown of machine.
15 Lifting of machine (lift loops).
16 Machine transport and storage.
PAGE 6 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
DAILY PRE-OPERATION CHECKLIST
Daily Pre-Operation Checklist
1 Engine oil level
2 Condition of blades
3 Blade pitch operation
4 Safety stop switch operation
5 Steering control operation
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 7
SAFETY INFORMATION
Do not operate or service the equipment before reading
Potential hazards associated with the operation of this
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.
SAFETY MESSAGES
The four safety messages shown below will inform you
about potential hazards that could injure you or others. The
safety messages specifi cally address the level of exposure
to the operator and are preceded by one of four words:
DANGER, WARNING, CAUTION or NOTICE.
SAFETY SYMBOLS
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in DEATH or SERIOUS INJURY.
WARNING
Indicates a hazardous situation which, if not avoided,
COULD result in DEATH or SERIOUS INJURY.
CAUTION
equipment will be referenced with hazard symbols which
may appear throughout this manual in conjunction with
safety messages.
Symbol Safety Hazard
Lethal exhaust gas hazards
Explosive fuel hazards
Burn hazards
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 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
GENERAL SAFETY
NOTICE
This equipment should only be operated by trained and
Whenever necessary, replace nameplate, operation and
accident due to equipment modifi cations. Unauthorized
recommended by Multiquip for this equipment. Damage
keep
Also, know the phone numbers
fi re department.
SAFETY INFORMATION
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 fi tting 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
infl uence of drugs or alcohol.
ALWAYS clear the work area of any debris, tools, etc.
that would constitute a hazard while the equipment is
in operation.
qualifi ed personnel 18 years of age and older.
safety decals when they become diffi cult read.
Manufacturer does not assume responsibility for any
equipment modifi cation will void all warranties.
NEVER use accessories or attachments that are not
to the equipment and/or injury to user may result.
ALWAYS know the location of the nearest
fi re extinguisher.
ALWAYS know the location of the nearest
fi rst aid kit.
ALWAYS know the location of the nearest phone or
a phone on the job site.
of the nearest ambulance, doctor and
This information will be invaluable in the case of an
emergency.
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.
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 9
TROWEL SAFETY
NOTICE
keep the machine in proper running condition.
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.
Association of Equipment Manufacturers (AEM) can be
engine is hot. High pressure boiling water will gush out
SAFETY INFORMATION
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
fl ow of cooling air. NEVER operate this equipment in any
enclosed or narrow area
where free fl ow of the air is
restricted. If the air fl ow is
restricted it will cause injury
to people and property and
serio u s dama g e to t he
equipment or engine.
NEVER operate the equipment in an explosive
atmosphere or near combustible materials. An
explosion or fi re could result causing severe
bodily harm or even death.
WARNING
If applicable, NEVER use your hand to fi nd
hydraulic leaks. Use a piece of wood or
cardboard. Hydraulic fl uid injected into the
skin must be treated by a knowledgable
physician immediately or severe injury or
death can occur.
DANGEROUS
GAS FUMES
ALWAYS
Fix damage to machine and replace any broken parts
immediately.
ALWAYS
A safety manual for operating and maintenance
personnel of concrete power trowels produced by the
obtained for a fee by ordering through their website at
www.aem.org.
Order FORM PT-160
ENGINE SAFETY
WARNING
D O NOT pl ace hands o r fi ngers inside e ngine
compartment when engine is running.
NEVER operate the engine with heat shields or
guards removed.
Keep fi ngers, hands hair and clothing away
from all moving parts to prevent injury.
DO NOT remove the radiator cap while the
ALWAYS keep clear of rotating or moving
parts while operating the trowel.
NEVER di sco nne ct an y emerg enc y
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
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.
all warranties.
DO NOT remove the engine oil drain plug while the
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.
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,
muffl er or cylinder. Allow these parts to cool
before servicing equipment.
PAGE 10 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
NOTICE
BATTERY SAFETY
drop the battery. There is a possibility that the
keep the battery charged. If the battery is not
charge battery if frozen. Battery can explode.
environment to avoid the risk of a dangerous concentration
NEGATIVE battery terminal
keep battery cables in good working condition.
SAFETY INFORMATION
NEVER run engine without an air fi lter or with a dirty air
fi lter. Severe engine damage may occur. Service air fi lter
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
DO NOT start the engine near spilled fuel or combustible
fl uids. Fuel is extremely fl ammable and its vapors can
cause an explosion if ignited.
ALWAYS refuel in a well-ventilated area, away from
sparks and open fl ames.
ALWAYS use extreme caution when working with
fl ammable liquids.
DO NOT fi ll the fuel tank while the engine is running
or hot.
DANGER
DO NOT
battery will explode.
DO NOT expose the battery to open fl ames,
sparks, cigarettes, etc. The battery contains
combustible gases and liquids. If these
gases and liquids come into contact with a
fl ame or spark, an explosion could occur.
WARNING
A LWAYS wear safety glasses when
handling the battery to avoid eye irritation.
The battery contains acids that can cause
injury to the eyes and skin.
Use well-insulated gloves when picking up
the battery.
ALWAYS
charged, combustible gas will build up.
DO NOT
When frozen, warm the battery to at least 61°F (16°C).
DO NOT overfi ll tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or sparks from
the ignition system.
Store fuel in appropriate containers, in well-ventilated
areas and away from sparks and fl ames.
NEVER use fuel as a cleaning agent.
DO NOT smoke a round or ne ar th e
equipment. Fire or explosion could result
from fuel vapors or if fuel is spilled on a
hot engine.
ALWAYS recharge the battery in a well-ventilated
of combustible gases.
If the battery liquid (dilute sulfuric acid)
comes into contact with clothing or skin,
rinse skin or clothing immediately with
plenty of water.
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
before performing service on the equipment.
ALWAYS
Repair or replace all worn cables.
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 11
SAFETY INFORMATION
TRANSPORTING SAFETY
TOWING SAFETY
make
Make sure the hitch and coupling of the towing vehicle
NEVER
tow a trailer with defective hitches, couplings, chains, etc.
Trailer tires should be infl ated to 50 psi cold.
safety
attach trailer’s safety chains to towing
make sure the vehicle and trailer directional,
The maximum speed for highway towing is 55 MPH unless
posted otherwise. Recommended off-road towing is not to
Avoid sudden stops and starts. This can cause skidding,
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 fl oat pans attached unless
safety catches are used and are specifi cally cleared for
such transport by the manufacturer.
NEVER hoist the trowel more than three feet off the
ground with fl oat pans attached.
Before lifting, make sure that the lift loops are not
damaged.
Always make sure crane or lifting device has been
properly secured to the lift loops of the equipment.
ALWAYS shutdown engine before transporting.
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
sure the trailer that supports the trowel and the towing
vehicle are mechanically sound and in good operating
condition.
ALWAYS shutdown engine before transporting
are rated equal to, or greater than the trailer “gross
vehicle weight rating.”
ALWAYS inspect the hitch and coupling for wear.
Check the tire air pressure on both towing vehicle and
trailer.
Also check the tire tread wear on both vehicles.
ALWAYS make sure the trailer is equipped with a
chain.
ALWAYS properly
vehicle.
ALWAYS
backup, brake and trailer lights are connected and
working properly.
DOT Requirements include the following:
NEVER lift the equipment while the engine is running.
Tighten fuel tank cap securely and close fuel cock to
prevent fuel from spilling.
Use adequate lifting cable (wire or rope) of suffi cient
strength.
DO NOT lift machine to unnecessary heights.
ALWAYS tie down equipment during transpor t by
securing the equipment with rope.
PAGE 12 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
• Connect and test electric brake operation.
• Secure portable power cables in cable tray with tie
wraps.
exceed 15 MPH or less depending on type of terrain.
or jack-knifi ng. Smooth, gradual starts and stops will
improve towing.
Avoid sharp turns to prevent rolling.
Trailer should be adjusted to a level position at all times
when towing.
Raise and lock trailer wheel stand in up position when
towing.
SAFETY INFORMATION
Place chock blocks underneath wheel to prevent rolling
while parked.
Place support blocks underneath the trailer’s bumper to
prevent tipping while parked.
Use the trailer’s swivel jack to adjust the trailer height to
a level position while parked.
ENVIRONMENTAL SAFETY
NOTICE
Dispose of hazardous waste properly.
Examples of potentially hazardous waste
are used motor oil, fuel and fuel fi lters.
DO NOT use food or plastic containers to dispose of
hazardous waste.
DO NOT pour waste, oil or fuel directly onto the ground,
down a drain or into any water source.
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 13
SPECIFICATIONS/DIMENSIONS
C
HEIGHT
1
LENGTH
A
Figure 1. HHN31VTCSL5 Dimensions
Table 1. HHN31VTCSL5 Dimensions/Specifications
Specification Parameter HNN31V (Vanguard)
A–Length – in. (cm) 97.0 (246.4)
B–Width – in. (cm) 50.0 (127)
C–Height – in. (cm)
1
46.0 (117)
Weight – lbs. (kgs.) Operating 1,042 (477)
Weight – lbs. (kgs.) Shipping 1,224 (555)
Engine – H.P. 31
Fuel Tank – gallons (liters) 5 (19)
Rotor – RPM 60 to 160
Path Width – in. (cm) 91 (231)
Lubrication Oil ISO 220 GR 5EP
Gear Box Oil Capacity 144 OZ.
Fuel Consumption (Full Load) 0.54 LB/BHP-HR
Radiator Capacity 1.0 GAL.
B
WIDTH
PAGE 14 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
Table 2. Noise and Vibration Emissions
SPECIFICATIONS
Guaranteed ISO 11201:2010 Based
Sound Pressure Level at Operator Station in dB(A)
Guaranteed ISO 3744:2010 Based
Sound Power Level in dB(A)
Whole Body Vibration Per ISO 2631-1:1997+A1:2010
2
in m/s
∑A(8)
97
117
0.19
NOTES:
1. Sound Pressure and Power Levels are “A” weighted Measures per ISO 226:2003 (ANSI S1.4-1981). They are measured with the operating
condition of the machine which generates the most repeatable but highest values of the sound levels. Under normal circumstances, the sound
level will vary depending on the condition of the material being worked upon.
2. The vibration level indicated is the vector sum of the RMS (Root Mean Square) Values of amplitudes on each axis, standardized to an 8 hour
exposure period, and obtained using operating condition of the machine that generates the most repeatable but highest values in accordance
with the applicable standards for the machine.
3. Per EU Directive 2002/44/EC, the daily exposure action value for whole body vibration is 0.5 m/s
1.15 m/s2 ∑A(8).
2
∑A(8). The daily exposure limit value is
Table 3. Engine Specifications
Model Briggs & Stratton Vanguard DM950G
Type Gasoline Engine
Cylinders 3
Piston Displacement 58.1 cu.in. (952 cc)
Bore and Stroke 2.83 in.x 3.07 in. (72 mm x 78 mm)
Max. Torque 51.7 ft lbs (70.1 N·m) @ 220rpm
Engine Oil Capacity 3.5 qt. (3 liters)
Fuel Tank 5 gal.(18.9 liters)
Dry Weight 159 lbs. (72.1 Kg)
Dimensions (L x W x H)
17.09 in. x 17.44 in. x 20.54 in.
(434 mm x 443 mm x 522 mm)
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 15
GENERAL INFORMATION
HHN RIDE-ON TROWEL FAMILIARIZATION
The HHN series Ride-On Power Trowel is designed for the
floating and finishing of concrete slabs.
Take a walk around the HHN Ride-On Power Trowel. Take
notice of all the major components (see Figure 2 and Figure
3) like the engine, blades, air cleaner, fuel system, fuel shutoff valve, ignition switch etc. Check that there is always oil
in the engine, and gear oil in the gear box assembly.
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 HHN Ride-On Power Trowels.
Look at the operator control levers. Grab the control levers
and move them around a bit. Look to see how moving the
control levers causes the gearboxes and frame to move.
Notice the foot pedal which controls the engine speed. Also
take a look at the main driveline of the trowel. Take note
and reference how the belts look, this is the way the belts
should look when adjusted properly.
Before using your HHN Ride-On Power 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.
ENGINE
The HHN Ride-On Power Trowel is equipped with a liquid
cooled 31 HP Vanguard gasoline engine. Refer to the
engine owner’s manual for specific instructions regarding
engine operation. This manual is included with the rideon trowel at the time of shipping from Whiteman. Please
contact your nearest Multiquip Dealer for a replacement
should the original manual disappear.
Figure 2 and Figure 3 show the location of the controls,
indicators and general mainte nance parts. Each control
may perform more than one function.
GEARBOXES
The HHN Ride on Power Trowel consist of two separate
gearbox assemblies that are enclosed in rugged cast
aluminum gear cases.
The gearbox casing holds 50% more oil capacity than
competitors, which allows more lubrication to be provided
to critical points.
STEERING ASSIST
Dual control levers located in front of the operator's seat
are provided for steering the HHN Ride on Power Trowel.
The control levers are linked to two spring loaded cylinders.
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 4 for
a complete description on the control levers directional
positioning.
CONSTANT VELOCITY JOINTS (CV-JOINTS)
Constant velocity joints insure the efficient transfer of power
to the drive shaft and maintain the timing of the gearboxes
without any chance of slippage.
TRAINING
For training, please use the “TRAINING CHECKLIST”
located in the front of this manual. This checklist is not
intended to be a substitu te for proper training but will
provide an outline for an experienced operator to provide
training to a new operator.
BLADES
The blades of the ride-on power trowel 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). The HHN ride-on power trowels are 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 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
NOTES
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 17
COMPONENTS
1. Seat — Place for operator to sit. Engine will not start
unless operator is seated. Seat is adjustable, fore and
aft for operator comfort.
2. Steering Control Lever (right side) — Allows the unit
to move in either a forward, reverse left or right direction.
3. Retardant Spray Control Buttons — When pressed
allows retardant spray to flow through the spray nozzle
located at the front of the machine.
4. Twin Pitch Control — 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.
5. Twin Pitch Control — 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.
6. Steering Control Lever (left side) — Allows the unit to
move in either a forward, reverse left or right direction.
7. Light Switch — When activated, turns on four halogen
lights. Lights offer better visibility when working indoors.
8. Ignition Switch — With key inserted turn clockwise
to start engine.
9. Oil Indicator Light — Lights red when oil pressure is low.
10. Water Indicator Light — Lights red when water
temperature is high.
11. Charge Indicator — Lights red when electrical system
is not charging properly.
12. Hour Meter — Indicates number of hours the key
switch is in the "ON" position.
13. Choke Control Lever — In cold weather pull this lever
forward about half way to start engine. After engine
warms push knob all the way in.
14. Fuel Gauge/Filler Cap — Indicates the amount of fuel
in the fuel tank. Remove this cap to add fuel.
15. Fuel Tank — Holds 5 gallons of unleaded gasoline.
16. Spare Belt Carrier — Contains a spare belt. Belt is
used on the drive pulley.
17. Left Foot Riser — Operator foot rest pedal.
18. Spray Nozzles — Spray nozzle for retardant.
19. 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.
3
2
10
4
9
11
7
19
12
1
8
18
3
6
14
13
5
15
16
17
20
Figure 2. HHN Components (Front)
PAGE 18 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
COMPONENTS
34
20. EZ- Mover Boss — Front -side insertion point for EZ
Mover. Used when the transporting of the trowel is
required.
21. Radiator/Filler Cap — Holds coolant or water
necess ary to keep engine at a safe operating
temperature. Remove this cap to add water or
antifreeze. DO NOT revove this cap when the engine
is warm.
22. Lift Loops — Located on both the left and right sides
of the main frame. Used when the trowel must be lifted
onto a concrete slab.
23. Lights — Four 12 volt halogen lights are provided
with this unit.
24. Right-Side Spider — Consists (basic) of trowel arms,
blades, wear plate, and thrust collar etc.
25. Left-Side Spider — Consists (basic) of trowel arms,
blades, wear plate, and thrust collar etc.
26. Safety Kill Switch — Shuts down engine when
operator is not sitting in seat.
27. Engine Oil Filler Cap — Remove this cap to add
engine oil.
28. Overflow Bottle — Supplies coolant to the radiator
when radiator coolant level is low. Fill to indicated level
as shown on bottle.
29. Engine Air Filter — Prevents dirt and other debris from
entering the fuel system. Lift locking latch on air filter
cannister to gain access to filter element.
30. Engine Dip Stick — Indicates engine oil level. Add
oil as required.
31. Oil Filter — Provides oil filtering for the engine.
32. Battery — Provides +12V DC power to the electrical
system
33. Retardant Spray Motors — Used in conjunction with
the left and right spray control buttons.
34. Retardant Spray Tank — Holds 5 gallons of retardant.
35. Belt Guard — Encloses drive belt used in conjunction
with clutch.
36. EZ- Mover Boss — Back- side insertion point for EZ
Mover. Used when the transporting of the trowel is
required.
37. Oil Sight Glass — Indicates the level of the hydraulic
oil in the gear box.
27
36
21
28
24
22
23
25
26
29
35
30
31
RETARDANT ONLY
37
32
Figure 3. HHN Components (Rear)
33
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 19
NEW MACHINE SETUP
The purpose of this section is to assist the user in setting
up a NEW trowel. If the trowel is already assembled, (seats,
handles, knobs and battery), this section can be skipped.
NOTICE
A new ride-on trowel cannot be put into service until the
following installation instructions are completed. These
instructions only need to be performed at the time of
unpacking a NEW trowel.
Before packaging and shipping, this ride-on power trowel
was run and tested at the factory. If there are problems,
please let us know.
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 lower handle assemblies,
perform the following:
1. Remove the bolts from the plastic bag tied to the
control towers.
SEAT ASSEMBLY
The seat is not installed on the trowel for shipping purposes.
To attach the seat, perform the following:
NOTICE
H-series trowels have a seat that is mounted on tracks,
similar to an automobile seat. This seat can be adjusted
fore and aft via the control lever under the front of the seat.
1. Remove the seat from the protective wrapping.
2. Remove the bolts on the bottom of the seat, and place
seat on the seat mounting plate, then insert the bolts
through the holes or slots on the seat mounting plate
and tighten.
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
2. Remove all protective wrapping and straps from the
control handles.
3. Slip the top (loose) control handle 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
Models equipped with adjustable height handles are
adjusted by placing the bolt through the set of holes
that bring the handles to a height most comfortable for
the operator.
5. Pay close attention to any wires that may be inside
the control handles. DO NOT pinch or cut any wires
during installation.
6. Remove the two knobs from the plastic bag for the
pitch control tower cranks and install the knobs onto
the tower crank levers.
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 4. 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)
Figure 4. Battery Cable Orientation
PAGE 20 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
BASIC ENGINE
1
2
6
Figure 5. Engine Components
3
4
5
INITIAL SERVICING
The engine (Figure 5) 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. The engine shown above is a
Briggs & Stratton Vanguard Gasoline engine. Operation for
other types of engines may vary somewhat.
1. Thermostat — Regulates the temperature of the
engine coolant.
7
14
13
12
11
10
10
8
9
8. Coolant Temperature Sending Unit — Device that
measures coolant temperature.
9. Governor Lever — This lever restricts engine speed
(high idle or low idle) through a speed control device
linked to the accelerator system.
10. Oil Drain Plugs (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.
2. Oil Filler Cap — Remove to add engine oil.
3. Ignition Coil — Regulates coolant temperature
11. Oil Filter — Spin-on type, filters oil for contaminants.
12. Oil Dip Stick — Remove to check amount and
condition of oil in crankcase.
4. Electric Starter — Starts engine when ignition key is
rotated to the "ON" position.
13. Oil Pressure Sending Unit — Device that measures
engine oil pressure.
5. Oil Pan — Holds a maximum of 3.5 quarts (3.3 liters)
of motor oil.
14. Carburetor — Low-emission carburetor equipped
with an idle mixture valve with a limiter which allows
6. Alternator — Provides charge for battery and voltage
adjustment.
for the +12 VDC electrical system.
7. Spark Plug — Provides spark to the ignition system.
Set spark plug gap to 0.028 ~ 0.031 inch (0.6~0.7 mm).
Clean spark plug once a week.
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 21
This section is intended to assist the operator with the initial
OPERATING
(OIL CHECK)
FILL PLUG
inspection of the HHN 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 HHN 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.
ENGINE OIL LEVEL
INSPECTION
GEAR BOX
DRAIN PLUG
SIGHT GLASS
Figure 7. Gearbox Oil Plugs/Sight Glass
FUEL
Determine if the engine fuel is low (Figure 8). If fuel level
is low, remove the fuel filler cap and fill with appropriate
engine fuel. The HHN31V uses diesel fuel.
1. Pull the engine oil dipstick from its holder.
2. Determine if engine oil is low (Figure 6), add correct
amount of engine oil to bring oil level to a normal safe
level. (See Table 5).
ENGINE OIL
DIPSTICK
SAFE
OIL LEVEL
ADD
ENGINE
OIL
MAX
MIN
Figure 6. Engine Oil Dipstick
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 7.
FUEL
E F
Figure 8. 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
Never store the ride-on trowel with fuel in the tank for
any extended period of time. Always clean up spilled
fuel immediately.
2. The oil level of the gear box should be at the half-way
point of the sight glass (Figure 7). 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.
PAGE 22 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
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.
NOTICE
The HHN31V 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.
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.
5. Turn the ignition key clockwise to the (start) position.
The oil, charge, and preheat indicator lights (Figure
10) should be ON.
NOTICE
OIL, CHARGE, and PREHEAT indicator lights come on
when ignition switch is in the ON position, and the engine
is NOT running.
OIL
W
A
T
E
R
CH
A
RG
E
Figure 10. Oil and Charge Indicator Lights
6. Turn ignition key fully clockwise and listen for engine
to start. Once engine has started release ignition key.
Figure 9. Blade Speed Control Foot Pedal
2. The right foot pedal (Figure 9) 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.
3. Keep your foot OFF the pedal (right foot pedal). Start
the engine at idle (without touching the foot pedal).
7. If the engine fails to start in this manner, consult the
engine owner’s manual supplied with the trowel.
8. 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.
Repeat this section a few times to get fully acquainted with
the engine starting procedure.
4. Insert the ignition key into the ignition switch.
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 23
OPERATION
STEERING
Two control levers located in front of the operator’s seat
provide directional control for the HHN trowel. Table 4
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 11.
LEFT
CONTROL
LEVER
RIGHT
CONTROL
LEVER
Figure 11. 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.
FORWARD
DIRECTION
4. Practice maneuvering the ride-on trowel using the
information listed in Table 4. 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.
6. Push both the left and right joysticks backward and
repeat steps 3 through 6 while substituting the word
reverse for forward.
Table 4. Control Lever Directional Positioning
Control Lever Direction Results
Left
Left
Right
Right
Left and Right
Left and Right
Left and Right
Left and Right
Move Control Lever
Forward
Move Control Lever
Backward
Move Control Lever
Forward
Move Control Lever
Backward
Move Both Control Levers
Forward
Move Both Control Levers
Backward
Move Both Control Levers
to the Right
Move Both Control Levers
to the Left
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.
PAGE 24 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
MAINTENANCE
When performing maintenance on the trowel or engine,
follow all safety messages and rules for safe operation
stated at the beginning of this manual.
See the engine manual supplied with your machine for
appr o priat e engin e maint enanc e sched u le and
troubleshooting guide for problems.
WARNING
Accidental starts can cause severe injury
or death.
ALWAYS place the ON/OFF switch in the
OFF position before performing maintenance.
Disconnect negative battery cable from
battery before servicing.
ALWAYS allow the engine to cool before
servicing. NEVER attempt any maintenance
work on a hot (muffler, radiator, etc.) trowel.
MAINTENANCE SCHEDULE
3. Replace gearbox lubricant.
4. Check and adjust blade speed.
WARNING
Cer ta in ma inte nance ope rati ons or ma c hine
adjustments require specialized knowledge and skill.
Attempting to perform maintenance operations or
adjustments without the proper knowledge, skills or
training could result in equipment damage or injury to
personnel. If in doubt, consult your dealer.
AIR CLEANER (DAILY)
The Vanguard engine is equipped with a replaceable, highdensity paper air cleaner element. Check the air cleaner
daily or before starting the engine. Check for and correct
heavy buildup of dirt and debris along with loose or
damaged components (Figure 12).
AIR CLEANER
BODY
Daily (8-10 Hours)
1. Check the fluid levels in the engine and gearboxes, fill
as necessary.
2. Check V-belt.
Weekly (30-40 Hours)
1. Relube arms, thrust collar and steering links.
2. Replace blades if necessary.
3. Check the engine air filter and change as necessary.
4. Replace engine oil and filter as necessary, see engine
manual.
Monthly (100-150 Hours)
1. Remove, clean, reinstall and relube the arms and thrust
collar. Adjust the blade arms.
2. Replace gearbox lubricant after the first 100 hours of
operation. Replace every 500-600 hours.
3. Check drive belt for excessive wear.
Yearly (500-600 Hours)
1. Check the arm bushings, thrust collar bushings, shaft
seals and belts. Replace if necessary
2. Check pitch control cables for wear.
CARTRIDGE
COVER
LATCHES
(COVER CLAMPS)
Figure 12. Air Cleaner Components
1. Unlock the cover clamps and remove cover.
2. Remove cartridge from air cleaner body.
3. Clean cartridge by gently tapping the end with the
handle of a screwdriver. Replace cartridge if very dirty
or damaged.
4. Carefully clean out the air cleaner cover.
5. Install cartridge in body.
6. Install cover and lock cover clamps.
NOTICE
Operating the engine with loose or damaged air cleaner
components could allow unfiltered air into the engine
causing premature wear and failure.
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 25
MAINTENANCE
PRIMING
ENGINE OIL AND FILTER
1. Change the engine oil and filter after the first 5 hours
of use, then change oil every 6 months or 150 hours.
2. Remove the oil filler cap (Figure 5), and fill engine
crankcase with recommended type oil as listed in Table
5. Fill to the upper limit of dipstick.
3. Crankcase oil capacity with oil filter replacement is
6.72 qts. (7.4 liters).
Oil Filter (300 Hours)
1. Replace the engine oil filter (Figure 13) every other oil
change or 300 hours. Refer to your engine manual for
specific details to perform this operation.
SEAL
PUMP
O-RING
DRAIN
PLUG
SENSOR
WIRE
FUEL
FILTER
Figure 14. Fuel Filter
OIL AND FUEL LINES
Check the oil and fuel lines and connections regularly
for leaks or damage. Repair or replace as necessary.
Replace the oil and fuel lines every two years to maintain
the line's performance and flexibility.
Figure 13. Oil Filter
2. Be sure to coat the seal of the new oil filter with clean
engine oil.
Table 5. Recommended Viscosity Grades
30
10W-30, 10W-40, 10W-50
5W-30
-20
F
C
-30
TEMPERATURE RANGE EXPECTED BEFORE NEXT OIL CHANGE
0
-20
32 40 60 80 100
-10
20
10
0
20 30 40
FUEL FILTER
Replace the engine fuel filter (Figure 14) every 800 hours.
Refer to your engine manual for specific details to perform
this operation.
RADIATOR/COOLING SYSTEM
WARNING
Hot coolant can cause severe burns.
DO NOT remove cap if radiator is HOT.
1. Check and clean radiator fins.
2. Check cooling water.
3. Check radiator hoses for fatigue or cracking.
4. Check radiator cap seal.
Refer to your engine manual for additional information.
PAGE 26 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
BATTERY/CHARGING SYSTEM
DANGER
Flammable, explosive gas. (produces
hydrogen gas while charging or during
operation). Keep area around battery well
ventilated and keep from any fire source.
Battery electrolyte contains corrosive, toxic
chemical. (dilute sulfuric acid). Avoid
contact with eyes and skin.
Sh ock or fi re due to el ectric short circuit. Disconnect battery cables before
inspecting electrical system and never
“spark” battery terminals to test for charge.
1. Check and clean battery terminals for corrosion.
2. Check and keep battery electrolyte between upper and
lower limits indicated on the battery. Never operate or
recharge without sufficient fluid in the battery.
MAINTENANCE
3. Never attempt to charge a battery that is frozen. The
battery can explode unless first allowed to thaw.
4. Disconnect the negative terminal ( - ) of the battery
during storage. If unit will be stored where ambient
temperature will drop to -15° C or less, remove and
store battery in a warm, dry place.
LONG TERM STORAGE
Remove the battery.
Drain fuel from fuel tank.
Clean exterior with a cloth soaked in clean oil.
Store unit covered with plastic sheet in moisture and
dust-free location out of direct sunlight.
CAUTION
Never store the ride-on trowel with fuel in the tank for
any extended period of time. Always clean up spilled
fuel immediately.
ENGINE TUNE-UP
See the engine manual supplied with your machine for
specific information on tuning up your engine as well as
appropriate maintenance schedule and troubleshooting
guide for problems.
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 27
MAINTENANCE (OLD STYLE CLUTCH)
WIDTH
NOTICE
This section is intended to aid users in the maintenance
of drive assemblies with an old style Comet clutch.
CHECKING THE DRIVE BELT
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.
Under normal operating conditions, a drive belt may last
approximately 150 hours. If your trowel is not reaching this
kind of life span for drive belt wear, check the drive belt for
proper pulley alignment and spacing .
To gain access to the drive belt, 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.
WARNING
DO NOT attempt to insert hands or tools into
the 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 V-belt guard cover
until the muffler has cooled. Allow the entire
trowel to cool down before performing this
procedure.
REMOVING THE DRIVE BELT
1. Remove Drive Belt Guard Cover. See Figure 16.
DRIVE
BELT
COVER
Figure 16. Drive Belt Cover
2. Squeeze the drive belt as shown in Figure 17, and pull
the belt upwards. This will spread open the faces of the
lower drive pulley.
DRIVE
BELT
LOWER
PULLEY
Figure 17. Expanding Lower Drive Pulley
3. Insert the wooden block (Figure 17) between the moveable
face and the fixed face of the lower drive pulley. See Figure
20. This block will help keep the lower drive pulley faces
open while installing the new drive belt.
WOOD
BLOCK
Leave the existing drive belt intact until instructed to cut it.
Leave the engine in place for this procedure. It is not
necessary to slide the engine to replace the drive belt.
Have a 3/4 x 1 x 3-1/4 inch wooden block available.
LENGTH
HEIGHT
.75 IN.
Figure 15. Wooden Block for Spacer
PAGE 28 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
3.25 IN.
1.00 IN.
4. If the belt is not being reused (recommended), CUT
the drive belt. Ensure all belt remnants are removed
from the pulleys.
Figure 18. Wood Block
MAINTENANCE (OLD STYLE CLUTCH)
SPARE BELT
INSTALLING DRIVE BELT
(USING REPLACEMENT DRIVE BELT)
The HHN31V Ride-On Power Trowel is equipped with a
replacement drive belt (spare) carrier, which is mounted
on the inboard side of the fuel tank near the clutch. Make
sure that there is ALWAYS a spare drive belt in the drive
belt carrier before the trowel is placed on a slab to finish
concrete.
In the event of a drive belt failure, the spare (replacement)
drive belt can be used for quick replacement at the job site
to continue trowel operation.
1. If necessary, refer to the “Removing the Drive Belt”
section. Ensure all remnants of old belt have been
removed from pulleys.
2. To replace the drive belt with the spare drive belt,
remove the 2 bolts that secure the drive belt carrier.
(Figure 19) This will allow free movement of the belt
for installation. Take care with to not contaminate the
relplacement belt with grease or dirt.
3. With the wood block holding the lower pulley open,
place the replacement belt into the lower pulley first.
Work the belt over the upper drive pulley into the pulley
groove.
4. Squeeze the belt enough to remove the wood block.
With the block removed, release the tension on the belt.
5. Reinstall the spare belt carrier and the drive belt guard.
6. Replace the spare belt before the next trowel use. See
“Spare Drive Belt Replacement” procedure.
HOLDER
CV-JOINT
DRIVE
BELT
Figure 19. Installing Drive Belt
LOWER
PULLEY
WOOD
BLOCK
HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12) — PAGE 29
SPARE BELT
MAINTENANCE (OLD STYLE CLUTCH)
DRIVE
CENTRIFUGAL
SPARE DRIVE BELT REPLACEMENT
To replace a spare drive belt, be prepared to disconnect the
CV-joint from the left-side gearbox. See Figure 20.
1. Place the trowel on suitable supports and observe all
safety precautions.
2. Remove the three screws that secure the CV-joint to
the left-side gearbox coupler.
3. Once the CV-joint has been separated from the leftside gearbox, push the CV-joint inward so that a gap
exists between the gearbox and the CV-joint. Slide
the spare V-belt between the gearbox coupler and the
CV-joint. Avoid contaminating the replacement belt with
grease or oil when sliding it between the CV-Joint and
gearbox coupler.
4. Place the spare drive belt inside the drive belt carrier,
and secure the spare belt carrier to the inboard side
of the left gearbox.
5. Install the three screws that secure the CV-joint to the
left-side gearbox coupler.
TORQUE CONVERTER
The HHN31V trowel is equipped with a Torque Converter
which supplies torque to both the left and right gear boxes.
The function of the a torque converter is to automatically
deliver the correct amount of torque required by the trowel
under all load conditions. This enables the trowel to deliver
the necessary torque for float pan applications and the high
rotor speeds required for burnishing concrete.
The torque converter is of the variable pitch pulley type,
(Figure 21) connected by a drive belt.
BELT
TORQUE
CONVERTER
VARIABLE
PITCH
PULLEY
Figure 21. Torque Converter/Variable Pitch
Pulley
DRIVE PULLEY
HOLDER
LEFT
SIDE
GEARBOX
NEW
SPARE
BELT
CV-JOINT
BOLT
(REMOVE
3 PLACES)
Figure 20. Replace Spare Belt
The drive pulley uses centrifugal force (Figure 22 and
Figure 23) to create a belt squeeze force transmitted at the
pulley faces. This condition functions as an automatic clutch.
FORCE
FIXED FACE
VARIABLE
FORCE
BELT
SQUEEZE
FORCE
Figure 22. Torque Converter (Centrifugal Force)
PAGE 30 — HHN31VTCSL5 RIDE-ON TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/03/12)
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