Multiquip JWN User Manual
OPERATION AND PARTS MANUAL
JWN-SERIES
RIDE-ON POWER TROWEL
HONDA GX670TAF 24 HP ENGINE
Revision #8 (12/18/07)
To find the latest revision of this
publication, visit our website at:
www.multiquip.com
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
P/N 20214
JWN-SERIES — 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.
JWN-SERIES — 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.
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 3
JWN-SERIES — TABLE OF CONTENTS
MQ WHITEMAN — JWN-SERIES
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 Message Alert Symbols .............................. 8-9
Rules For Safe Operation .................................. 10-13
Specifications (Trowel) ............................................ 14
Specifications (Engine) ........................................... 15
General Information ................................................ 16
Controls and Indicators ...................................... 17-18
Basic Engine ........................................................... 19
New Machine Setup Instructions ............................ 20
Initial Start-Up ....................................................21-23
Maintenance ...................................................... 24-35
Troubleshooting (Engine) ................................... 36-37
Troubleshooting (Trowel) ................................... 38-39
Explanation of Codes In Remarks Column ............. 40
Suggested Spare Parts & Service Items................. 41
Nameplate and Decals....................................... 42-43
Pivot Assembly (Left/Right) ................................ 44-45
Steering Handles Assembly (Left/Right) ............ 46-47
Steering Control Assembly (Left/Right) ............. 48-49
Gearbox Assembly (Right) ................................. 50-51
Gearbox Assembly (Left) ................................... 52-53
Twin Pitch Handle Assembly (Left/Right) ........... 54-55
Twin Pitch Tower Assembly (Left/Right) .............56-57
Twin Pitch Miter Box Assembly (Left/Right) ....... 58-59
Drive Assembly .................................................. 60-61
Muffler/Belt Assembly ........................................ 62-63
Beltguard Assembly ........................................... 64-65
Spider Assembly (Right) .................................... 66-67
Spider Assembly (Left)....................................... 68-69
Yoke Assembly ...................................................70-71
Foot Pedals/Throttle Assembly .......................... 72-73
Control Panel Assembly ..................................... 74-75
Frame/Fuel Assembly ........................................76-77
Battery Assembly ............................................... 78-79
Spray Assembly ................................................. 80-81
Light Assembly ................................................... 82-83
Seat Frame Assembly ........................................ 84-85
EZ-Mover Assembly ........................................... 86-87
HONDA GX-670-TAF ENGINE
Air Cleaner Assembly......................................... 88-89
Camshaft Assembly ........................................... 90-91
Carburetor Assembly ......................................... 92-93
Control Assembly ............................................... 94-95
Control Box Assembly ........................................ 96-97
Crankcase Cover Assembly ...............................98-99
Crankshaft Assembly .....................................100-101
Cylinder Barrel Assembly ............................... 102-103
Cylinder Head Assembly ................................ 104-105
Fan Cover Assembly ...................................... 106-107
Flywheel Assembly ........................................ 108-109
Fuel Pump Assembly .....................................110-111
Ignition Coil Assembly .................................... 112-113
Labels Assembly ............................................114-115
Oil Cooler Assembly ....................................... 116-117
Piston & Connecting Rod Assembly .............. 118-119
Starter Motor Assembly ................................. 120-121
Terms And Conditions Of Sale .............................. 122
PAGE 4 — HTN 31V
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 4
PARTS ORDERING PROCEDURES
Ordering parts has never been easier!
Choose from three easy options:
Effective:
January 1
st
, 2006
Best Deal!
Order via Internet (Dealers Only):
Order parts on-line using Multiquip’s SmartEquip website!
■
View Parts Diagrams
■
Order Parts
■
Print Specification 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)
Non-Dealer Customers:
Contact your local Multiquip Dealer for
parts or call 800-427-1244 for help in
locating a dealer near you.
Order via Phone:
If you have an MQ Account, to obtain a
Username and Password, E-mail us at:
parts@multiquip.com.
To obtain an MQ Account, contact your
District Sales Manager for more information.
internet
Use the
on
Standard orders
and qualify for a 5% Discount
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
their local Multiquip Representatives for
Parts Ordering information.
Note: Discounts Are Subject To Change
Note: Discounts Are Subject To Change
should contact
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
❒❒
All orders are treated as
Standard Orders
and will ship the same day if received prior
to 3PM PST.
www.multiquip.com
WE ACCEPT ALL MAJOR CREDIT CARDS!
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 5
Specify Preferred Method of Shipment:
❒❒
✓
UPS/Fed Ex
■
Priority One
■
Ground
■ Next Day
■
Second/Third Day
✓ DHL
✓
Tr u c k
JWN-SERIES — TRAINING CHECKLIST
TRAINING CHECKLIST
This checklist will lists some of the minimum requirements for machine maintenance and operation. Please feel free to detach it and
make copies. Use this checklist whenever a new operator is to be trained or it can be used as a review for more experienced
operators.
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Operator _________________________________________ Trainee __________________________________________
COMMENTS:
PAGE 6 — HTN 31V
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 6
JWN-SERIES — DAILY PRE-OPERATION CHECKLIST
DAILY PRE-OPERATION CHECKLIST
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JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 7
JWN-SERIES — SAFETY MESSAGE ALERT SYMBOLS
FOR YOUR SAFETY AND THE SAFETY OF OTHERS!
Safety precautions should be followed at all times when
operating this equipment. Failure to read, understand and
comply with the Safety Messages and Operating Instructions
could result in injury to yourself and others.
This Operation Manual has been
developed to provide instructions for the
safe and efficient operation of the JWN Series Ride-On Trowel. For engine
maintenance information, please refer to the
engine manufacturer's instructions for data
relative to its safe operation.
Before using this Ride-On Trowel, ensure that the operating
individual has read, understands, and complies with all
instructions in this manual.
SAFETY MESSAGE ALERT SYMBOLS
The three (3) 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 three words: DANGER,
WARNING, or CAUTION.
HAZARD SYMBOLS
Lethal Exhaust Gases
Engine exhaust gases contain poisonous
carbon monoxide. This gas is colorless and
odorless, and can cause death if inhaled.
NEVER operate this equipment in a confined
area or enclosed structure that does not
provide ample free flow air.
Explosive Fuel
Gasoline is extremely flammable, and its
vapors can cause an explosion if ignited. DO
NOT start the engine near spilled fuel or
combustible fluids. DO NOT fill the fuel tank
while the engine is running or hot. DO NOT
overfill tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or
sparks from the ignition system. Store fuel in
approved containers, in well-ventilated areas
and away from sparks and flames. NEVER
use fuel as a cleaning agent.
DANGERDANGER
DANGER
DANGERDANGER
You WILL be
if you DO NOT follow these directions.
WARNINGWARNING
WARNING
WARNINGWARNING
You CAN be KILLED or
you DO NOT follow these directions.
CAUTICAUTI
CAUTION
CAUTICAUTI
You CAN be
these directions.
Potential hazards associated with trowel operation will be
referenced with Hazard Symbols which appear throughout this
manual, and will be referenced in conjunction with Safety
Message Alert Symbols.
KILLED
INJURED
or
SERIOUSLY INJURED
SERIOUSLY INJURED
if you DO NOT follow
if
Burn Hazards
Engine components can generate extreme heat.
To prevent burns, DO NOT touch these areas
while the engine is running or immediately after
operations. NEVER operate the engine with
heat shields or heat guards removed.
Rotating Parts
NEVER operate equipment with covers, or
guards removed. Keep
and
clothing
prevent injury.
away from all moving parts to
fingers, hands, hair
PAGE 8 — HTN 31V
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 8
JWN-SERIES — SAFETY MESSAGE ALERT SYMBOLS
Accidental Starting Respiratory Hazard
Accidental starts can cause severe injury or death. ALWAYS
place the ON/OFF switch in the OFF position. Disconnect and
ground spark plug lead and disconnect negative battery cable
from battery before servicing.
Over Speed Conditions
NEVER tamper with the factory settings of the
engine governor or settings. Personal injury
and damage to the engine or equipment can
result if operating in speed ranges above
maximum allowable.
Other important messages are provided throughout this manual
to help prevent damage to your trowel, other property, or the
surrounding environment.
ALWAYS wear approved respiratory
protection.
Sight and Hearing hazard
ALWAYS wear approved eye and hearing
protection.
Equipment Damage Messages
CAUTIONCAUTION
CAUTION
CAUTIONCAUTION
This
Ride-On trowel
surrounding environment could be damaged if you do
not follow instructions.
, other property, or the
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 9
JWN-SERIES — RULES FOR SAFE OPERATION
■
RULES FOR SAFE OPERATION
WARNINGWARNING
WARNING
WARNINGWARNING
Failure to follow instructions in this manual may lead to serious
injury or even death! This equipment is to be operated by
trained and qualified personnel only! This equipment is for
industrial use only.
The following safety guidelines should always be used when
operating the JWN-SERIES Ride-On Trowel.
SAFETY
■
DO NOT operate or service this equipment
before you read, understand, and comply
with all safety messages in this manual.
The manual must be kept available and
accessible to the operator.
■
This equipment should not be operated by persons under the
minimum statutory age limit.
■
NEVER use this machine for any purpose other than those
described in this manual.
■
NEVER operate the trowel without proper protective clothing,
shatterproof glasses, steel-toed boots and other protective
devices required for the job.
NEVER operate this equipment when not feeling well due to
fatigue, illness or taking medicine.
■
NEVER operate the trowel under the influence of drugs or
alcohol.
■
Replace nameplate, operation and safety decals when they
become difficult to read.
■
ALWAYS check the trowel for loosened hardware such as
nuts and bolts before starting.
■
NEVER touch the hot exhaust manifold, muffler
or cylinder. Allow these parts to cool before
servicing the trowel. Contact with
components can cause serious burns.
■
The engine of this trowel requires an adequate free flow of
cooling air. NEVER operate the trowel in any enclosed or
■
ALWAYS refuel in a well-ventilated area, away from sparks
and open flames.
hot!
narrow area where free flow of
the air is restricted. If the air flow
is restricted it will cause serious
damage to the engine and may
cause injury to people.
Remember the engine gives off
DEADLY
gas.
carbon monoxide
■
Topping-off to filler port is dangerous, as it tends to spill fuel.
■
NEVER use fuel as a cleaning agent.
■
ALWAYS use extreme caution when working with flammable
liquids. When refueling, STOP the engine. Allow the engine
to cool before adding fuel or performing service and
maintenance functions.
■
NEVER operate the trowel in an
■
NEVER use accessories or attachments which are not
recommended by the manufacturer for this equipment.
Damage to the equipment and/or injury to user may result.
■
Manufacturer does not assume responsibility for any accident
due to equipment modifications. Unauthorized equipment
modification will void all warranties. Any modification which
could lead to a change in the original characteristics of the
machine should be made only by the manufacturer who shall
confirm that the machine is in conformity with appropriate
safety regulations.
PAGE 10 — HTN 31V
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 10
explosive atmosphere where fumes
are present, or near combustible
materials. An explosion or fire could
result in severe
death.
■
NEVER
Fire or explosion could result from
vapors
smoke
, or if fuel is spilled on a
bodily harm or even
around or near the machine.
fuel
hot!
engine.
JWN-SERIES — RULES FOR SAFE OPERATION
■
NEVER run engine without air filter. Severe engine damage
may occur. Service air filter frequently to prevent carburetor
malfunction.
■
NEVER place your
while starting or operating this equipment.
■
AVOID wearing jewelry or loose fitting clothing that may snag
on the controls or moving parts as this can cause a serious
injury.
■
ALWAYS keep clear of
operating the trowel.
■
Moving Parts – Shut down the engine before performing
service or maintenance functions. Contact with moving parts
can cause serious injury.
■
ALWAYS check to make sure that the operating area is clear
before starting the engine.
■
NEVER leave the machine
■
ALWAYS be sure the operator is familiar with proper safety
precautions and operations techniques before using trowel.
feet
or
rotating
hands
inside the guard rings
or
moving parts
unattended
while running.
while
Lifting the Ride-On Trowel
DANGERDANGER
DANGER
DANGERDANGER
Pay close attention to ventilation when
operating the trowel in confined spaces
such as tunnels, buildings or similar areas.
The engine exhaust contains harmful
elements. Ensure proper air flow to move
engine exhaust away from the operator.
CAUTIONCAUTION
CAUTION
CAUTIONCAUTION
heavy
This ride-on trowel is very
around. Use proper heavy lifting procedures and DO NOT
attempt to lift the ride-on trowel by the guard rings.
and awkward to move
■
ALWAYS keep the work area well organized.
■
ALWAYS clear the work area of any debris, tools, etc. that
would constitute a hazard while the trowel is in operation.
WARNINGWARNING
WARNING
WARNINGWARNING
ALWAYS check to make sure that the operating area is
clear before starting the engine.
■
No one other than the operator is to be in the working area
when the trowel is in operation.
■
NEVER allow passengers or riders on the trowel during
operation.
■
Always observe all applicable compulsory regulations
relevant to environmental protection, especially, fuel storage,
the handling of hazardous substances, and the wearing of
protective clothing and equipment. Instruct the user as
necessary, or, as the user, request this information and
training.
■
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.
The JWN-SERIES Ride-On Power Trowel is designed to be
moved and handled several ways.
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 2,000 pounds (1000kg) lifting capacity and the lifting gear must be capable of lifting
at least this amount.
DANGERDANGER
DANGER
DANGERDANGER
NEVER stand under or allow anyone
else to stand under the trowel while it
is being lifted.
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 11
JWN-SERIES — RULES FOR SAFE OPERATION
Transporting
■
ALWAYS shutdown engine before transporting.
■
Tighten fuel tank cap securely and close fuel petcock to
prevent fuel from spilling.
■
Drain fuel when transporting trowel for long distances or over
bad roads.
■
When placing the trowel on a truck-bed for transport,
tie-down the trowel.
■
If the trowel is being transported via a trailer, make sure the
trailer complies with all local and state safety transportation
laws. Refer to the following "
for basic towing techniques.
Towing Safety Precautions"
always
■
■
■
■
■
■
■
Use chock-blocks at each wheel when parked to prevent
trailer from rolling.
Use the trailer's swivel jack to adjust the trailer height to a
level position while parked.
Avoid sudden stops and starts. This can cause the trailer to
skid or jack-knife. Smooth, gradual starts and stops will
improve towing.
Avoid sharp turns.
Trailer should be adjusted to a level position at all times
when towing.
Raise and lock trailer wheel stand in the "UP" position when
transporting.
DOT requirements include the following:
Towing Safety Precautions
CAUTIONCAUTION
CAUTION
CAUTIONCAUTION
Conform to
Towing Regulations
roads.
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 in good operating condition
and both units are mechanically sound.
The following list of suggestions should be used when towing
your trowel:
■
Make sure the hitch and coupling of the towing vehicle are
rated equal to, or greater than the trailer "gross vehicle weight
rating" (GVWR) of 6,000 lbs.
■
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
the tire tread wear on both vehicles.
■
ALWAYS make sure the trailer is equipped with "Safety
Chains ".
■
ALWAYS attach trailer's safety chains to towing vehicle
properly.
■
ALWAYS make sure the vehicle and trailer directional,
backup, brake, and trailer lights are connected and working
■
DO NOT exceed the recommended highway speed when
towing. Unless posted otherwise, do not exceed 45 MPH
highway, and 10 MPH off-road.
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 12
Department of Transportation (DOT) Safety
before transporting trowel on public
. Also check
PAGE 12 — HTN 31V
Connect and test electric brake operation.
Secure portable power cables in cable tray with tie wraps.
Battery
The battery contains acids that can cause injury to the eyes and
skin. To avoid eye irritation,
shielding. Use well insulated gloves when picking the battery
up. Use the following guidelines when handling the battery.
■
DO NOT drop the battery. Any impact to
the battery may cause it to explode.
■
DO NOT expose the battery to open flames,
sparks, lit cigarettes etc. The battery
contains combustible gases and liquids. If
these gases and liquids come in contact
with a flame or spark an explosion can occur.
■
ALWAYS keep the battery charged. If the
battery is not charged a buildup of combustible gas will occur.
■
ALWAYS keep battery cables in good working condition.
Repair or replace all worn cables.
■
ALWAYS disconnect the
performing service on the trowel.
■
ALWAYS recharge the battery in a vented air environment
to avoid risk of a dangerous concentration of combustible
gases.
■
In case the battery liquid, (dilute sulfuric acid), comes in contact
clothing or skin
with
with plenty of water.
■
In case the battery liquid, (dilute sulfuric acid), comes in contact
eyes
with your
then contact the nearest doctor or hospital and seek medical
attention.
, rinse eyes immediately with plenty of water,
always
, rinse skin or clothing immediately
wear safety glasses or face
negative battery terminal
before
JWN-SERIES — RULES FOR SAFE OPERATION
Maintenance Safety
■
ALWAYS shut down the engine and disconnect battery before
performing service or maintenance functions. Contact with
moving parts can cause serious injury.
■
Securely support any trowel components that must be raised.
■
NEVER lubricate components or attempt service on a running
trowel.
■
ALWAYS allow the trowel a proper amount of time to cool
before servicing.
■
Keep the trowel in proper running condition.
■
Make sure that there is no buildup of concrete, grease, oil or
debris on the machine.
■
Repair damage to the trowel immediately and always replace
broken parts.
■
Dispose of hazardous waste properly. Examples of potentially
hazardous waste are used motor oil, fuel and fuel filters.
■
DO NOT use plastic food 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.
Emergencies
■
■
■
ALWAYS know the location of
the nearest
ALWAYS know the location of the
nearest
Know the phone numbers of the nearest
ambulance, doctor
that a phone or radio is readily available at the
jobsite. If this is not possible, know the location of
the nearest phone. This information will be
invaluable in the event of an emergency.
fire extinguisher
first aid kit
.
and
.
fire department
. Ensure
■
NEVER store trowel with fuel in the tank for any extended
period of time. Always clean up spilled fuel immediately.
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 13
C = 46.75 inches
Figure 1. JWN-Series Dimensions Specifications
JWN-SERIES— SPECIFICATIONS (TROWEL)
B =39 inches
A = 77 inches
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NOTE:
1. Sound pressure is "A" weighted . Measured at the operators
ear position while the ride-on trowel is operating at full
throttle on concrete in a manner most often experienced in
normal
“
” circumstances. Sound pressure may vary
depending upon the condition of the concrete. Hearing
protection is always recommended.
PAGE 14 — HTN 31V
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 14
2. The vibration level indicated is the maximum RMS (Root
Mean Square) value obtained at the handle grip while
operating the ride-on trowel on curing concrete in a
manner most often experienced in “
normal
circumstances. Values were obtained from all three axes
of motion. The values shown represent the maximum RMS
value from these measurements.
”
JWN-SERIES— SPECIFICATIONS (ENGINE)
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JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 15
.81
JWN-SERIES — GENERAL INFORMATION
JWN Series Ride-On PowerTrowel Familarazation
The JWN Series Ride-On Power Trowel is designed for the
floating and finishing of concrete slabs.
Take a walk around your trowel. Take notice of all the major
components (see Figures 2 and 3, pages 16 and 17) like the
engine, blades, air cleaner, fuel system, fuel shut-off valve,
ignition switch etc. Check that there is always oil in the engine,
and gear oil in the gearbox 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 trowel.
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 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
This trowel is equipped with an air cooled 24 HP Honda 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 for a replacement should the original manual
disappear.
Gearboxes
The JWN Series Ride-On Power Trowel uses two separate
gearbox assemblies that are enclosed in rugged cast aluminum
gear cases.
The gearbox casing has a large oil capacity allowing optimum
lubrication to critical points.
Steering Assist
Dual control levers located in front of the operator's seat are
provided for steering the 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 5 on page 22 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 (Page 5). 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.
Blades
The blades of the 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). This trowel is equipped
with four blades per rotor equally spaced in a radial pattern and
attached to a vertical rotating shaft by means of a
spider
assembly.
Figures 2 and 3 show the location of the controls, indicators and
general maintenance parts. Each control may perform more than
one function. The functions of each control or indicator is on
pages 16 and 17.
PAGE 16 — HTN 31V
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 16
JWN-SERIES — CONTROLS AND INDICATORS
1. Seat – Engine will not start unless operator is seated.
2. Steering Control Levers -Directs the unit forward, reverse,
left, or right.
3. Retardant Spray Control Button – Sprays retardant
through the nozzle at the front of the machine.
4. Twin Pitch Control – Both pitch towers are linked together.
One crank may be turned to adjust the blade pitch
simultaneously or individually controlled for each set of
blades. Turn the crank as marked on its top surface to
increase or decrease blade pitch.
5. Light Switch – Turns on three halogen lights. Two in front
one in rear.
6. Ignition Switch – With key inserted, turn clockwise to
start engine.
7. Hour Meter - Indicates number of hours the engine is run.
8. Choke Control Lever - In cold weather pull this lever to
start engine. After engine warms push knob all the way in.
2
9. Fuel Gauge/Filler Cap - Indicates the amount of fuel in
10. Fuel Tank - Holds 5 gallons of unleaded gasoline.
11. Left Foot Riser – Operator foot rest pedal.
12. Spray Nozzle – Spray nozzle for retardant.
13. Right Foot Pedal – Controls blade speed. Slow blade
14. EZ- Mover Boss – Front attachment point for EZ Mover.
15. Dip Stick- Access hole provided to check engine oil.
16. Spark Plug- Access the spark plug through this cutout.
1
the fuel tank. Remove this cap to add fuel.
speed is accomplished by slightly depressing the foot pedal.
Maximum blade speed is accomplished by fully depressing
the foot pedal.
Used to move the trowel.
3
2
4
9
10
7
8
5
6
16
13
15
11
12
4
14
Figure 2. JWN-SERIES Controls and Indicators (Front)
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 17
14
JWN-SERIES — CONTROLS AND INDICATORS
RETARDANT ONLY
17. Safety "kill switch" – Shuts down engine when seat is
25. EZ- Mover Boss – Rear attachment point for EZ Mover.
empty.
18. Rear Light – The JWN-Series Ride-On Power Trowel has
26. Spiders (Left/Right) – Consists of trowel arms, blades,
three 12 volt halogen lights.
19. Lift Loops – Located on both sides of the main frame.
Used to lift the trowel.
27. Document Box- Contains all product documentation.
28. Battery – Provides +12V DC power to the electrical
20. Engine Air Filter – Protects the engine from dirt.
21. Oil Filter – Filters the engine oil.
29. Belt Guard – Encloses drive belt used in conjunction with
22. Oil Drain - Remove the plug to drain the engine oil.
23. Retardant Spray Tank – Holds 5 gallons of retardant.
30. Engine Oil Fill - Remove this cap to add engine oil.
24. Retardant Spray Pump – Delivers retardant to the spray
nozzle.
Read this entire instruction manual completely before
attempting to operate the trowel.
Used to transport the trowel.
wear plate, and thrust collar.
system.
clutch.
NOTE
27
28
29
25
17
30
19
26
RETARDANT ONLY
26
19
18
20
21
22
23
24
25
Figure 3. JWN-SERIES Controls and Indicators (Rear)
PAGE 18 — HTN 31V
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 18
JWN-SERIES — BASIC ENGINE
Figure 4. Engine Controls and Components
INITIAL SERVICING
The 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 & details of operation and servicing. The
engine shown above is a HONDA engine. Operation for other
types of engines may vary somewhat.
1. Fuel Tank – Five gallon capacity; use unleaded gasoline.
2. Fuel Filler Cap – Remove this cap to add unleaded
gasoline to the fuel tank. Make sure cap is tightened
securely. DO NOT over fill.
4. Air Filter – Prevents dirt and other debris from entering the
fuel system. Unsnap air filter cover to gain access to filter
element.
5. Choke Knob – Used in the starting of a cold engine or in
cold weather conditions. The choke enriches the fuel
mixture.
6. Engine ON/OFF Switch – "ON" position permits engine
starting, "OFF" position stops engine operations.
7. Fuel Drain Valve – OPEN to let fuel flow, CLOSE to stop
the flow of fuel.
DANGER
Add fuel to the tank only when the engine is
stopped and has had an opportunity to cool down.
In the event of a fuel spill, DO NOT attempt to
start the engine until the fuel residue has been completely wiped up
and the area surrounding the engine is dry.
3. 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.
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 19
8. Fuel Filter – Filters fuel for contaminants.
9. Oil Filter – Spin-on type, filters oil for contaminants.
10. Oil Cooler – Helps keep engine oil cooler for longer engine
life.
11. Throttle Lever – Controlled by accelerator pedal,
increases or decreases engine RPM.
12. Oil Filler Cap – Remove to add engine oil.
13. Oil Dip Stick – Remove to check amount and condition of
oil in crankcase.
14. Starter – Starts engine when ignition key is rotated to the
"ON" position.
15. Oil Drain Plug – Remove to drain crankcase oil.
16. Spark Plug – Provides spark to the ignition system. Set
spark plug gap to 0.6 - 0.7 mm (0.028 - 0.031 inch) Clean
spark plug once a week.
JWN-SERIES — NEW MACHINE SETUP INSTRUCTIONS
Trowel Pre-Set Up Instructions
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.
The new trowel cannot be put into
service until the pre-setup installation
NOTE
Before packaging and shipping, this JWN SERIES 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 two lower handle assemblies perform the
following:
1. Remove the bolts from the plastic bag tied to the control
towers.
instructions are completed. These
pre-setup instructions only need to
be performed at the time of
NEW
unpacking a
trowel.
Seat Assembly
The seat is not installed on the trowel for shipping purposes. To
attach the seat perform the following:
NOTE
seat. H and S-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.
There are two types of seats,
depending on what type of trowel
you have. J and B series trowels have
slots on the seat mounting plate that
allow fore and aft adjustment of the
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.
Some models are equipped with
NOTE
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.
adjustable height handles. Adjust the
height by placing the bolt through the
set of holes that corresponds to the
most comfortable height.
Use all safety precautions specified by the battery
manufacturer when working with the battery. See further
specific safety information on page 14 of this manual.
To install the battery on the trowel, make sure that the battery is
well seated in the battery box. 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.
CAUTIONCAUTION
CAUTION
CAUTIONCAUTION
PAGE 20 — HTN 31V
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 20
JWN-SERIES — INITIAL START-UP
The following section is intended as a basic guide to the ride-on
trowel operation, and is not to be considered a complete guide
to concrete finishing. It is strongly suggested that all operators
(experienced and novice) read “
the American Concrete Institute, Detroit Michigan.
DO NOT use your ride-on power trowel until this section is
thoroughly understood.
CAUTIONCAUTION
CAUTION
CAUTIONCAUTION
Slabs on Grade
” published by
Table 4. Recommended Viscosity Grades
Failure to understand the operation of the JWN-SERIES
trowel could result in severe damage to the machine or
personal injury.
See Figures 2 and 3 (Pages 20 and 21) for the location of
any control or indicator referenced in this manual.
Engine Oil Level
ALWAYS check engine oil BEFORE EACH USE.
1. Pull the engine oil dipstick (Item 2, Figure 5)
from its holder.
2. Determine if engine oil is low (Figure 5).
3. If engine oil is low, remove oil filler cap (Item 1, Figure 5),
and add correct amount of engine oil to bring oil level to a
normal safe level. Use oil as recommeded in Table 3.
Gearbox Oil Level
1. Check the gearbox oil level in both gearboxes
by removing the level plug and ensuring that
the oil is at the correct level. See Figure 6.
2. Fill the gear box just to the level of the fill plug.
(Figure 6) with 69 oz. of Mobil ISO VG 640
SCH 634 oil.
DRAIN
PLUG
FILL/LEVEL
CHECK PLUG
GEARBOX
VENT
Figure 6. Gearbox Oil Plugs/Sight Glass
Fuel
Determine if the engine fuel is low (Figure 7). If fuel level is low,
remove the fuel filler cap and fill with unleaded gasoline.
DANGERDANGER
DANGER
DANGERDANGER
Figure 5. Engine Oil Dipstick
To prevent extensive engine wear or
damage, always maintain the proper
NOTE
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 21
oil level in the crankcase. Never
operate the engine with the oil level
outside of marks on dipstick, (Items
3 and 4 in Figure 5.)
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. DO
NOT attempt to start the engine until the fuel
residue has been completely wiped up and
the area surrounding the engine is dry.
ENGINEFUEL ONLY
SER IES
Figure 7. Fuel Gauge
Important Information Before You Start
FUEL
E
JWN-SERIES — INITIAL START-UP
5. When starting a cold engine, pull the choke knob, (Figure 9)
out to the
engine is warm, the unit can be started with choke halfway
or completely
closed
F
position. In warm weather or when the
open
.
1. This
NEVER disable or disconnect the "safety stop switch". It is
provided for the operator's safety and injury or death may
result if it is disabled, disconnected or improperly
maintained.
2. The safety stop switch should be used to stop the engine
3. The right foot pedal (Figure 8) controls blade and engine
ride-on trowel
switch"
Remember the engine will not start unless an operator is
sitting in the operator’s seat. The weight of an operator
depresses an electrical switch which will allow the engine
to start.
after every use. Doing this will verify the switch is working
properly thus providing safety for the operator. Remember
to turn the key to the “OFF” position after stopping the
machine. Not doing so will drain the battery.
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.
. This switch is located beneath the seat assembly.
WARNINGWARNING
WARNING
WARNINGWARNING
is equipped with a safety
"safety stop
6. Keep your foot OFF the blade speed control pedal and in
all circumstances, start the engine at idle (without touching
the pedal).
7. Insert the
8. Turn the ignition key (Figure 10) clockwise and listen for
the engine to start. Once the engine starts release ignition
key.
9. If the engine fails to start in this manner, consult the engine
owner's manual supplied with the trowel.
10. 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 repair the safety stop switch. See Table 6
(Troubleshooting ) for possible causes.
Figure 9. Choke Knob
ignition key
into the ignition switch.
SER IES
START
Figure 8. Blade Speed Control Foot Pedal
Starting the Engine
1. With one foot on the ground and the other foot placed on
the trowel's platform, grab the frame near the seat and lift
yourself onto the trowel. Sit in the operator's seat and ensure
the control handles, foot pedal and control panel items can
be comfortably accessed.
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 22
11. Let the engine idle for 3-5 minutes. If choke is applied,
PAGE 22 — HTN 31V
OFF
Figure 10. Ignition Key
push the choke to the open position as soon as the engine
will run smoothly.
JWN-SERIES — INITIAL START-UP
Steering
Two control levers located in front of the operator’s seat provide
directional control for the JWN-SERIES Ride-On Power Trowel.
Table 4 illustrates the various directional positions of the joysticks
and their effect on the ride-on trowel.
NOTE
1. Push both the left and right control levers forward. See
Figure 11.
All directional references with respect
to the steering control levers are from
operator’s
the
LEFT CONTROL LEVER
seat position.
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. Pull both the left and right joysticks backward and repeat
steps 3 through 6 while substituting the word reverse for
forward.
FORWARD DIRECTION
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 blades 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 in Table 4. Try to practice controlled
motions as if you were finishing a slab of concrete. Practice
edging and covering a large area.
Trowel arms can be damaged by rough handling or by
striking exposed plumbing or forms while in operation.
ALWAYS
to the trowel arms.
CAUTIONCAUTION
CAUTION
CAUTIONCAUTION
look-out for objects which might cause damage
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 23
JWN-SERIES — MAINTENANCE
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.
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.
Maintenance Schedule
1. Check and retighten all fasteners as necessary.
Air Cleaner (Daily)
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. Release the four latch tabs (Figure 12) from the air cleaner
cover, and remove the cover.
Daily (8-10 Hours)
1. Check the fluid levels in the engine and gearboxes, fill as
necessary. Check Air Cleaner. See section on Air Cleaner
servicing.
Weekly (30-40 Hours)
1. Relube arms, thrust collar and steering links.
2. Replace blades if necessary.
3. Check and clean or replace the engine air filter as
necessary. (See following section on Air Filter
Maintenance.)
4. Replace engine oil and filter as necessary. (See following
section on Oil and Filter.)
Monthly (100-125 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 thereafter.
3. Check drive belt for excessive wear. (Refer to following
section on Drive Belt maintenance.)
Yearly (500-600 Hours)
1. Check and replace if necessary the arm bushings, and
thrust collar bushings, shaft seals and belts.
2. Check pitch control cables for wear.
2. Remove the foam filter from the cover.
3. Remove the paper filter from the air cleaner case.
4. Inspect both air filter elements, replace them if necessary.
5. To clean the paper air filter, 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/cm
filter element from the air cleaner case side.
6.
NEVER!
fibers. If the paper element is excessively dirt, replace
element.
7. Clean the
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.
8. 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.
9. Reinstall the foam air filter element to the air cleaner cover,
then reinstall the paper air filter element and cover to the
air cleaner case. Securely latch the four hook tabs on the
air cleaner cover
Figure 12. Air Cleaner Components
2
) through the
try to brush off dirt; brushing will force dirt into the
foam air filter element
in warm soapy water,
3. Replace gearbox lubricant.
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 24
PAGE 24 — HTN 31V
Oil And Fuel Lines
CAUTIONCAUTION
CAUTION
CAUTIONCAUTION
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.
■
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.
JWN-SERIES — MAINTENANCE
Changing Engine Oil (100 Hours)
1. Change the engine oil after the first 20 hours of use, then
change every 6 months or 100 hours.
2. Remove the oil filler cap (Figure 5, Item 1), and fill engine
crankcase with recommended type oil as listed in Table 4.
Fill to the upper limit of dipstick.
3. Crankcase oil capacity is 1.69 qts. (1.60 liters) without oil
filter replacement, with oil filter replacement 2.02 qts. (1.90
liters).
Oil Filter (200 Hours)
1. Replace the engine oil filter (Figure 13) every 200 hours.
Long Term Storage
■
Remove the battery.
■
Drain fuel from fuel tank, fuel line and carburetor.
■
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.
■
Clean exterior with a cloth soaked in clean oil.
■
Store unit covered with plastic sheet in moisture and dustfree location out of direct sunlight.
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
CAUTIONCAUTION
CAUTION
CAUTIONCAUTION
Figure 13. Oil FIlter
2. Be sure to coat the
engine oil.
Fuel Filter (200 Hours)
1. Replace the engine fuel filter (Figure 14) every 200 hours.
Figure 14. Honda Fuel Filter
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 25
seal
of the new oil filter with clean
■
See your engine manual for specific information on tuning
up your engine, checking and gaping the spark plugs, etc.
See the engine manual supplied with
NOTE
At the front of the book (Page 9) there is a “Daily Pre-Operation
Checklist”. Make copies of this checklist and use it on a daily
basis.
Disconnect spark plug wires and battery cables before attempting
any service or maintenance on the ride-on trowel.
your machine for appropriate engine
maintenance schedule and
troubleshooting guide for problems.
JWN-SERIES — MAINTENANCE
Checking The Drive Belt
The drive belt needs to be replaced as soon as it starts to show
signs of wear. Indications of excessive belt wear are fraying,
squealing when in use, belts that emit smoke or a burning rubber
smell when in use.
5
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 (Item 1, Figure 16), 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.
WARNINGWARNING
WARNING
WARNINGWARNING
DO NOT attempt to insert hands or tools
into the belt area while the engine is
running. NEVER run the engine with the
safety guards removed. Keep fingers,
hands, hair and clothing away from all
moving parts to prevent bodily injury.
WARNINGWARNING
WARNING
WARNINGWARNING
1. Remove Drive Belt Guard Cover (Item 1, Figure 16).
2. Squeeze the drive belt as shown in Figure 17, and pull the
V-belt upwards. This will spread open the faces of the
drive pulley.
3
2
4
1
1 Drive Belt Guard Cover
2 Lower Pulley
3 Upper Pulley
4 Spare Drive Belt
5 Spare Drive Belt Holder
Figure 16. Drive Belt Guard Cover
lower
DO NOT remove the drive belt guard cover
until the muffler has cooled. Allow the entire
trowel to cool down before performing this
procedure.
Removing the Drive Belt
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Leave the existing drive belt intact until instructed to cut it.
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Leave the engine in place for this procedure. It is not
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necessary to slide the engine to replace the drive belt.
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Have a 3/4 X 1 X 3-1/4 inch wooden block available.
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WOODEN BLOCK
LENGTH
HEIGHT
.75 IN.
Figure 15. Wooden Block For Spacer Figure 17. Expanding Lower Drive Pulley
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 26
3.25 IN.
WIDTH
1.00 IN.
PAGE 26 — HTN 31V
1 Upper Pulley
2 Drive Belt
3 Lower Pulley Fixed Face
4 Lower Pulley Spread Apart
5 Lower Pulley Movable Face
6 Squeeze and Pull Up To Spread
Lower Pulley
1
2
6
5
3
4
Insert
3.
the 3/4" X 1" X 3-1/4" block between the moveable
face and the fixed face of the lower drive pulley. See Figure
18. This block will help keep the lower drive pulley faces
open while installing the new drive belt.
1
Wooden Block
Figure 18. Holding Lower Pulley Open
4. If the belt is not being reused (recommended),
drive belt. Ensure all belt remnants are removed from the
pulleys.
CUT
the
JWN-SERIES— MAINTENANCE
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 Removing Drive Belt Instructions.
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 3/4 x 1 x 3-1/4 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 procedures.
Installing the Drive Belt (Using Replacement Drive Belt)
The JWN-SERIES 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.
2
1
4
5
6
Figure 19. Drive Belt Install
3
1 Bolt, Spare Drive Belt Carrier
2 Spare Drive Belt Holder
3 Wooden Block
4 CV-Joint
5 New Spare Drive Belt
6
Lower Drive Pulley
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 27
JWN-SERIES— MAINTENANCE
5
4
6
2
3
1 CV Joint
2 Bolt (Remove 3 places)
3 New Spare Drive Belt
4 Bolt, Spare Drive Belt Carrier
5 Spare Drive Belt Holder
6 Left Side Gearbox
Figure 20. Spare Drive Belt Replacement
Spare Drive Belt Replacement
It will be necessary to disconnect the
CV-Joint from the left-side gearbox
NOTE
To replace a spare drive belt, be prepared to disconnect the CVjoint 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.
coupler. This means the removal of
the three screws that secure the CVJoint to the gearbox.
3. Once the CV-joint has been separated from the left-side
gearbox, push the CV-joint inward so that a gap exists
between the gearbox and the CV-joint (Figure 20). Slide
the spare V-belt between the gearbox coupler and the CVjoint. 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 leftside gearbox coupler.
1
PAGE 28 — HTN 31V
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 28
NEUTRALLOWSPEED HIGHSPEED
DRIVE
PULLEY
DRIVEN
PULLEY
A
B
C
JWN-SERIES— MAINTENANCE
(
)
DRIVE
PULLEY
DRIVE
PULLEY
LOW OUTPUT
SPEED
DRIVEN PULLEY
LOWENGINE RPM
HIGHENGINE RPM
DRIVEN PULLEY
HIGH OUTPUT
SPEED
CENTRIFUGAL FORCE
DISTANCE
MOVEABLE
FACE
TRAVELS
MOVEABLEFACE
IS CONTROLLED
BY ASPRING
AND BELT T ENSION
MOV ABLEFACEIS
CONTROLLED BY
ROLLER WEIGHT ARMS
AND SPRINGS
WEIGHT
RAMP
PLATE
BUSHING
ROLLER ARM
SPRING
DRIVE PULLEY
The JWN-Series Ride-On Power Trowel is equipped with a "Torque
Converter" which supplies torque to both the left and right gearboxes.
The function of the torque converter is to automatically deliver the
As shown in Figure 23, centrifugal force pushes the roller arms (see
Figure 23 below) against the ramp plate, forcing moveable face
toward fixed face squeezing belt.
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 used in the JWN Series Ride-On Power Trowel
is a variable pitch pulley type (Figure 21) connected by a drive belt.
DRIVE V-BELT
TORQUE
CONVERTER
VARIABLE PITCH
PULLEY
The "Variable Pitch Pulleys" have one
. The
face
is controlled by roller weight arms and springs, which change
position according to engine speed. The
Fig. 21. Torque Converter/Variable Pitch Pulley
is controlled by a spring and belt tension.
face
Fig. 23. Pulley Interaction
fixed face
drive
pulley ( torque converter, Figure 24) moveable face
, and one
driven
pulley
moveable
moveable
Drive Pulley
The "Drive Pulley" uses centrifugal force (Figures 22 and 23)
to create a belt squeeze force transmitted at the pulley faces.
This condition functions as an automatic clutch.
I
R
F
U
T
N
E
C
VARIABLE
FACE
Figure 22. Torque Converter (Centrifugal Force)
FORCE
BELT SQUEEZE
TORQUECONVERTER
G
A
L
F
O
R
C
DRIVE PULLEY
E
FIXED
FACE
Fig. 24. Variable Pitch Pulley
Figure 25. Pulley Conditions
JWN- SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 29
JWN-SERIES— MAINTENANCE
How It Works (Figure 24)
Condition A:
Condition B:
Condition C:
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Engine Idling
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Drive Pulley: Small
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Driven Pulley: Large
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Belt: Loose and Stationary
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Engine Accelerating
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Drive Pulley: Small But Increasing
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Driven Pulley: Large But Decreasing
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Belt: Approaching Tightness
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Engine At High Speed
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Drive Pulley: Large
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Driven Pulley: Small
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Belt: Tight
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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).
Matching Blade Pitch for Both Sets of Blades
Trowels equipped with optional Twin Pitch
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. Refer to Figure 27.
1. Lift the pitch adjustment handle on either side. Once lifted,
that side is now disconnected from the Twin Pitch
Clutch
This clutch system provides a high pulley ratio (a low gear- so to
speak) to start out and a low pulley ratio ( a high gear- so to
2. Adjust to match the opposite side.
3. When adjusted, lower the handle to Twin Pitch
position.
speak) for a high speed operation, with infinite variation between
the two.
TM
Controls may need
TM
system.
TM
operating
This means that it will not be necessary to give
full throttle
in
order to "break the blades/pans loose". The machine can slowly
be brought up to speed.
The torque sensitive pulley (Figure 25) utilizes a spring and cam
bracket. Peak performance results from proper interaction between
the driven pulley spring and the ramp angle of the cam bracket.
SPRING
DRIVEN PULLEY
CAM
BRACKET
MOVEABLE
FACE
Figure 26 . Pulley Spring and Cam Bracket
FIXED FACE
A Twin Pitch
TM
disengaged (one side)
B Operating Position
Figure 27. Pitch Towers
PAGE 30 — HTN 31V
JWN-SERIES • RIDE-ON POWER TROWEL — PARTS AND OPERATION MANUAL — REV. #8 (12/18/07) — PAGE 30
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