OPERATION MANUAL
SERIES
MODELS
WBH-16EAWD
WBH-16EAWDF
POWER BUGGY
(B&S VANGUARD 18 HP GASOLINE ELECTRIC START)
Revision #5 (10/12/22)
To find the latest revision of this publication or
associated parts manual, visit our website at:
www.multiquip.com
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
PROPOSITION 65 WARNING
PAGE 2 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
WBH-16EAWD
Power Buggy
Proposition 65 Warning ........................................... 2
Safety Information ............................................. 4–10
Lifting Procedures ............................................ 11–13
Specifications (Buggy) ........................................... 14
Specifications (Engine) .......................................... 15
Dimensions ............................................................ 16
General Information ............................................... 17
Components .......................................................... 18
Basic Engine .......................................................... 19
Inspection ........................................................ 20–22
Operation ......................................................... 23–28
Maintenance .................................................... 29–36
Troubleshooting ............................................... 37–39
Hydraulic System Diagram .................................... 40
Hydraulic Hose Connections ................................. 41
Traction Assist Wiring Diagram .............................. 42
Wiring Diagram (Engine) ....................................... 43
TABLE OF CONTENTS
NOTICE
Specifications and part numbers are subject to change
without notice.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 3
SAFETY INFORMATION
Do not operate or service the equipment before reading
the entire manual. Safety precautions should be followed
at all times when operating this equipment.
Failure to read and understand the safety
messages and operating instructions could
result in injury to yourself and others.
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
SAFETY SYMBOLS
Potential hazards associated with the operation of this
equipment will be referenced with hazard symbols which
may appear throughout this manual in conjunction with
safety messages.
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
Indicates a hazardous situation which, if not avoided,
COULD result in MINOR or MODERATE INJURY.
or NOTICE.
Symbol Safety Hazard
Lethal exhaust gas hazards
Explosive fuel hazards
Burn hazards
Rotating parts hazards
Hydraulic fluid hazards
NOTICE
Addresses practices not related to personal injury.
PAGE 4 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
GENERAL SAFETY
NOTICE
This equipment should only be operated by trained and
Whenever necessary, replace nameplate, operation and
Manufacturer does not assume responsibility for any
accident due to equipment modifi cations. Unauthorized
use accessories or attachments that are not
recommended by Multiquip for this equipment. Damage
keep
Also, know the phone numbers
fi re department.
This information will be invaluable in the case of an
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.
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.
qualifi ed personnel 18 years of age and older.
safety decals when they become diffi cult read.
equipment modifi cation will void all warranties.
NEVER
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
emergency.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 5
SAFETY INFORMATION
POWER BUGGY SAFETY
inspect the surface over which you will travel.
Look for holes, drop-offs and obstacles. Look for rough
and weak spots on docks, ramps or fl oor. Look for oil
spills, wet spots and slippery surfaces. Look for soft soil,
deep mud and standing water. Watch for anything that
might make you lose control or cause the power buggy
clear away trash and debris. Pick up anything
make sure aisles, ramps, doorways and
plan your work. Make sure you know where
you will make your pickups, dumps and turns. Before
operate the power buggy on unsafe haul roads,
operate power buggy on excessive slopes with
operate power buggy on extremely uneven
allow riders other than the operator on the
secure the step plate (platform) in the upright
position when using the power buggy over rough terrain.
stand on the power buggy step plate (platform)
when walking in rough terrain. Walk behind the power buggy.
touch, lean on or reach through the dump
climb on
CAUTION
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
serious damage to the
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
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 knowledgeable physician immediately or
severe injury or death can occur.
Accidental starting can cause severe injury
or death. ALWAYS place the ON/OFF
switch in the OFF position.
NEVER disconnect any emergency or safety devices.
These devices are intended for operator safety.
Disconnection of these devices can cause severe injury,
bodily harm or even death. Disconnection of any of these
devices will void all warranties.
NEVER approach power lines with any part of the
buggy unless all local, state/provincial and federal
(OSHA) required safety precautions have been taken.
Use extreme caution when approaching high voltage
power lines.
DANGEROUS
GAS FUMES
ALWAYS
to tip over.
ALWAYS
that might puncture the tires.
ALWAYS
passages are clear.
ALWAYS
you take a load, know where you will place it.
NEVER operate the power
buggy facing backwards. In
a backwards position, the
operator cannot properly
activate the manual brake,
emergency switch, grip the
handles or steer the machine.
ALWAYS face in the direction
of the bucket.
DO NOT
load areas, and dump areas.
DO NOT
a grade higher than 10% (6°), forward and backward.
DO NOT
surfaces.
NEVER
power buggy.
ALWAYS
DO NOT
DO NOT
mechanism or permit others to do so. NEVER
the power buggy or dump mechanism.
PAGE 6 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
SAFETY INFORMATION
DO NOT operate the power buggy at excessive speeds.
DO NOT stand in front or along side the buggy when
block the power buggy with appropriate blocks
start
Ensure that the speed control lever works freely and
start engine
Make sure that the tires are infl ated to the manufacturer’s
operate the power buggy with bad or worn tires.
make sure the hydraulic dumping mechanism
Avoid sudden stops and starts and changes in direction.
jerk the steering
attempt to work the control except from the
drive or tow the power buggy in traffi c or on
Fix damage to machine and replace any broken parts
The entire power buggy (tub, step plate, shroud, wheels,
etc.) should be cleaned after every use. Make sure there
is no buildup of concrete, grease, oil or debris on the
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.
position
Reckless operation may cause accidents and severe
injury. Slow down when approaching people, wet areas,
and going up and down grades. It is the responsibility of
the operator to adjust speed, as necessary, depending
on the conditions of the road or path.
ALLOW extra time to stop when operating the power
buggy ion wet surfaces or loosely graded materials.
DO NOT dump materials that are large and chunky.
These types of material may shift causing the power
buggy to tip and throw the operator off the machine. The
power buggy is intended for dumping free-fl owing and
loose materials such as dry soil, slag, and wet concrete.
DO NOT dump materials from bucket while the power
buggy is moving.
For walk behind operation, the operator platform must be
stowed and locked in the up position. The speed should
also be reduced to 3 mph (4.8 kph) or slower.
NOTICE
ALWAYS ensure power buggy is securely placed on
appropriate blocks or jackstands when performing
maintenance requires elevation of the buggy.
ALWAYS make sure the power buggy’s brakes are
working properly. Check brake linkage and adjust as
required. NEVER operate the power buggy with a
defective braking system.
Ensure brakes are applied when leaving or when using
on a slope.
discharging a load.
ALWAYS
when leaving the power buggy parked on a slope.
To prevent unexpected loss of control, DO NOT
engine on a sloping surface.
returns to the closed position. DO NOT
unless speed control linkage is working properly.
recommended tire pressure.
NEVER
ALWAYS replace defective tires with new ones.
ALWAYS
of the tub is working properly.
Operate the controls smoothly. DO NOT
or any other controls.
NEVER
operator’s position.
NEVER
public roads.
ALWAYS keep the machine in proper running condition.
immediately.
When parking on a slope, position the power buggy at
a right angle to a slope. Ensure that the parking brake
is engaged and holds the power buggy safely in place
when parking on a slope.
When filling or dumping DO NOT exceed payload
capacity of power buggy.
ALWAYS be aware of traveling conditions. Reduce load
if necessary.
DO NOT activate dump mechanism (tub) if buggy is
facing a down hill slope.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 7
machine.
ALWAYS
ALWAYS place the fuel valve lever in the OFF
when the equipment is not in use.
ENGINE SAFETY
WARNING
FUEL SAFETY
ALWAYS use extreme caution when working with
fi ll the fuel tank while the engine is running
overfi ll tank and tighten fuel cap until you hear
"clicking", since spilled fuel could ignite if it comes into
contact with hot engine parts or sparks from the ignition
Store fuel in appropriate containers, in well-ventilated
leave the power buggy in the vicinity of ovens,
furnaces or radiant heaters. Heat could raise the
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.
When frozen, warm the battery to at least 61°F (16°C).
DO NOT place hands or fingers inside
engine 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.
ALWAYS shut down the engine before
performing service or maintenance.
DO NOT remove the engine oil drain plug while the
engine is hot. Hot oil will gush out of the oil tank and
severely scald any persons in the general area of the
power buggy.
SAFETY INFORMATION
fl ammable liquids.
DO NOT
or hot.
DO NOT
system.
areas and away from sparks and fl ames.
NEVER use fuel as a cleaning agent.
DO NOT smoke around or near the equipment.
Fire or explosion could result from fuel vapors
or if fuel is spilled on a hot engine.
DO NOT
CAUTION
NEVER touch the hot exhaust manifold,
muffl er or cylinder. Allow these parts to cool
before servicing equipment.
Make certain the operator knows how to and is capable
of turning the engine OFF in case of an emergency.
NOTICE
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.
DANGER
pressure of the fuel so that vented gas could ignite.
BATTERY SAFETY (ELECTRIC START ONLY)
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
ALWAYS wear safety glasses when
handling the battery to avoid eye irritation.
The battery contains acids that can cause
injury to the eyes and skin.
Use well-insulated gloves when picking up
the battery.
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
charged, combustible gas will build up.
DO NOT
PAGE 8 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
ALWAYS recharge the battery in a well-ventilated
environment to avoid the risk of a dangerous concentration
LIFTING SAFETY
TRANSPORTING SAFETY
Tighten fuel tank cap securely and close fuel cock to
When transporting of the power buggy is required, place
the power buggy on a fl at bed truck or equivalent and
make sure all tie-downs and block are in
place and the bucket is completely lowered in the fl at
underneath wheel to prevent rolling.
When transporting the power buggy on a truck or trailer,
know the overall height to avoid contacting overhead
obstructions such as bridges and power lines. Check
position
of combustible gases.
SAFETY INFORMATION
NOTICE
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 NEGATIVE battery terminal
before performing service on the equipment.
ALWAYS keep battery cables in good working condition.
Repair or replace all worn cables.
CAUTION
NEVER allow any person or animal to stand underneath
the equipment while lifting.
NOTICE
When lifting of the power buggy is required, use a
properly rated forklift. Forklift pockets are provided on
the power buggy's frame. Make sure the forklift arms are
insert into the power buggy's fork lift pockets a minimum
of 24-inches. Before lifting, make sure that the lifting bale
is not damaged.
ALWAYS shutdown engine before transporting.
prevent fuel from spilling.
tie down securely.
ALWAYS
(horizontal) position and securely latched.
Place chock blocks
the truck and ramp capacities.
ALWAYS place the fuel valve lever in the OFF
when the before transporting.
NEVER tip the engine to extreme angles during lifting as
it may cause oil to gravitate into the cylinder head, making
the engine start diffi cult.
DO NOT lift machine to unnecessary heights.
NEVER lift the equipment while the engine is running.
ALWAYS use ramps capable of supporting the weight
of the power buggy and the operator to load and unload
the power buggy.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 9
ENVIRONMENTAL SAFETY/DECOMMISSIONING
Decommissioning is a controlled process used to safely
retire a piece of equipment that is no longer serviceable.
If the equipment poses an unacceptable and unrepairable
safety risk due to wear or damage or is no longer cost
effective to maintain (beyond life-cycle reliability) and is to
be decommissioned (demolition and dismantlement),be
sure to follow rules below.
EMISSIONS INFORMATION
This equipment conforms with applicable Environmental
Protection Agency (EPA) and California Air Resources
The gasoline engine used in this equipment has been
designed to reduce harmful levels of carbon monoxide
(CO), hydrocarbons (HC) and nitrogen oxides (NOx)
Fuel and vapor recovery hoses, EPA certifi ed SAE J30R7
Tampering with or altering the emission control system may
increase emissions beyond the legal limit. Do not remove
Additionally, modifying the fuel system may adversely affect
evaporative emissions, resulting in fi nes or other penalties.
The Emission control system is valid only for the United
States, its territories and commonwealths to include
The emission control label is an integral part of the emission
If a replacement emission label is needed, please contact
SAFETY INFORMATION
NOTICE
DO NOT pour waste or oil directly onto the ground, down
a drain or into any water source.
Contact your country's Department of
Public Works or recycling agency in your
area and arrange for proper disposal of
any electrical components, waste or oil
associated with this equipment.
When the life cycle of this equipment is over, remove
battery (if equipped) and bring to appropriate facility for
lead reclamation. Use safety precautions when handling
batteries that contain sulfuric acid.
When the life cycle of this equipment is over, it is
recommended that the unit frame and all other metal
parts be sent to a recycling center.
NOTICE
Board (CARB) emission regulations.
contained in gasoline exhaust emissions.
Mandated Emission Components:
Engine, EPA certifi ed
Fuel cap, EPA certifi ed
or SAE J30R14T2
Charcoal canister, EPA certifi ed
Miscellaneous Parts Associated with Emission System:
Hose clamps and retainer brackets
Roll over valve vapor recovery valve
Steel fuel tank
Metal recycling involves the collection of metal from
discarded products and its transformation into raw
materials to use in manufacturing a new product.
Recyclers and manufacturers alike promote the process
of recycling metal. Using a metal recycling center
promotes energy cost savings.
or alter any part of the system.
Canada.
Emission Control Label
system and is strictly controlled by regulation(s).
The label must remain with the engine for its entire life.
your authorized engine distributor.
PAGE 10 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
LIFTING PROCEDURES
WORK SAFELY!
Only
perform this procedure. Follow all rigging and lifting safety
rules when performing this procedure.
LIFTING SAFETY
LIFTING EQUIPMENT INSPECTION
perform a thorough inspection of lifting chains,
. All lifting equipment
Occupational Safety
and Health Administration (OSHA) Regulation 29 CFR
The Occupational Safety and Health Administration (OSHA)
Removal
requires that steel chains used for lifting be
removed from service
whenever wear at any point of any chain link
WARNING
Failure to comply with these lifting
instructions may result in lifting equipment
failure and severe personal injury or
death.
qualifi ed personnel with proper training should
CAUTION
NEVER allow any person to stand underneath the
equipment while lifting.
Power buggies are very heavy and awkward to move
around. ALWAYS use proper heavy-lifting procedures.
NEVER lift the equipment with the operator on the
machine.
NOTICE
ALWAYS make sure any lifting device has been properly
secured to the lift loops of the buggy.
DO NOT lift the equipment to unnecessary heights.
ALWAYS shut down the engine before transporting.
Tighten the fuel tank cap securely and close the fuel
cock to prevent fuel from spilling.
ALWAYS
hooks, or slings before each use
and procedures must comply with
Part 1926.251.
Chain Inspection
Regulation 29 CFR Part 1926.251 (b)(5) —
from service
inspected prior to each use, and
immediately
exceeds that shown in Table A.
Chain Size (Inches) Maximum Allowable Wear (Inch)
1/4 3/64
3/8 5/64
1/2 7/64
5/8 9/64
3/4 5/32
7/8 11/64
1 3/16
1 1/8 7/32
1 1/4 1/4
1 3/8 9/32
1 1/2 5/16
1 3/4 11/32
Table A. Maximum Allowable Wear
at Any Point of Chain Link
WARNING
ALWAYS check Rated Capacity tags on lifting chains
before use. DO NOT use chains with missing or illegible
Rated Capacity tags. ALWAYS make sure the rated
capacity of the lifting equipment is suffi cient for the
load being lifted.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 11
Sling Inspection
The Occupational Safety and Health Administration (OSHA)
Regulation 29 CFR Part 1926.251 (e)(8) —
service
requires that lifting slings be inspected prior to each
use, and
conditions listed in Table B are found.
LIFTING PROCEDURES
Removal from
removed from service immediately if any of the
Holes, tears, cuts, or snags
Embedded particles
Abrasive wear that exposes core fi bers
Missing or unreadable Rated Capacity tags
Melting, charring, weld spatter, or chemical burns
Broken or worn stitching that exposes the core fi bers
Knots
Any other condition which may cause doubt as to the strength of the sling
Table B. Conditions for Removal of Lifting Slings from Service
PAGE 12 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
LIFTING PROCEDURE
Use the correct lifting slings or chains for the weight of your
buggy in accordance with Occupational Safety and Health
Administration (OSHA) Regulation 29 CFR Part 1926.251 —
Rigging equipment for material handling
1. Make sure the tub is completely empty. DO NOT lift
Attach three lifting chains or nylon slings to the three
lifting points shown in Figure A. Make sure the chains
or slings are rated for a minimum load capacity of
Adjust slack in the chains or straps so that the buggy
Lift the buggy using an appropriate crane or
equivalent lifting device capable of lifting a minimum
WARNING
ALWAYS inspect the lifting equipment (slings, chains,
etc.) before each use.
.
NOTICE
MAKE SURE the lifting device has adequate lifting
capacity to lift the buggy.
LIFTING PROCEDURES
while the tub is loaded.
2. Raise the tub as shown in Figure A.
3. Turn the engine OFF.
4. Place the foot plate in the down position.
5.
2,600 pounds (1,180 kg).
6.
will remain level when lifted.
7.
of 2,600 pounds (1,180 kg).
3 LIFTING
POINTS
ENGINE
OFF
LIFTING
SLINGS
WBH-16
LIFTING DEVICE
CAPABLE OF LIFTING
MINIMUM 2,600 LB. (1,180 KG)
TUB EMPTY
AND RAISED
!
WARNING
CRUSH AREA
FOOT PLATE
DOWN
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 13
Figure A. Lifting Procedure
SPECIFICATIONS (BUGGY)
Table 1. Specifications (Power Buggy)
Models WBH-16EAWD/ WBH-16EAWDF
Maximum Weight Capacity
(Dual Wheels)
Operating Weight 1,485 lbs. (673.5 kg.)
Bucket/Tub Capacity 16 cu. ft. Water Level (.59 cu. yd.)
Bucket/Tub Material Polyethylene
Drive Hydrostatic
Speed Up to 7.25 mph. (11.67 km/h)
Steering Handle Bars To Rear Wheels
Fuel Tank Capacity 4.8 gallons (18.1 liters)
Hydraulic Oil Tank Capacity 5.3 gallons (20.4 liters)
Hydraulic Oil Type Exxon/Mobil Nuto H 46 or Equivalent.
Hydraulic Filter 10 Micron
Brakes (Drive Wheels) Dynamic Hydrostatic
Parking Brake (Drive Wheels) Mechanical
Dump Control Hydraulic Dump and Return
Discharge Height 6.0 in. (152 mm)
Ground Clearance 6.0 in. (152 mm)
2,500 lbs. (1,134 kg)
Gradeability 6° or 10%
12V BCI Group U1, 300 CCA @ 0°F
Battery (LxWxH)
Tires (Drive Wheels)
Tires (Steering)
PAGE 14 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
7.75 x 5.18 x 7.31 in.
(197 x 132 x 186 mm)
5.70 x 8.0
(145 x 203 x 483 mm)
4.80 x 8.0 in.
(122 x 203 mm)
SPECIFICATIONS (ENGINE)
Table 2. Specifications (Engine)
Model Briggs and Stratton Vanguard
Type Twin Cylinder, Overhead Valve, Air Cooled
Bore X Stroke 2.82 x 2.75 in. (71.88 x 69.85 mm)
Displacement 34.7 cu. in. (570 cc)
Maximum Power 18.0 hp (3,600 rpm)
Maximum Torque
Idle Speed 1,400 ± rpm
Maximum No Load RPM 3600 ± 100 rpm
Specific Fuel Consumption 1.64 gals./hr. (6.05 liters/hr.)
Fuel Type Unleaded Gasoline Minimum 85 Octane
Oil Type API Service Class SF, SG, SH, SJ or Higher
Oil Filter Spin-On
Crankcase Oil Capacity 1.8 quarts (1.7 Liters)
Starting System Recoil/Electric
Spark Plug Gap 0.028 - 0.031 in. (0.70 - 0.76 mm)
Air Cleaner Dual Element
Dry Weight 74.0 lbs. (33.56 kg.)
Outside Dimensions L X W X H
31.70 ft-lbs. (2,800 rpm)
14.37 kgf-m (2,800 rpm)
17.40 x 10.60 x 18.14 in.
(439 x 406 x 344 mm)
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 15
DIMENSIONS
Table 3. Dimensions
Reference
Letter
A 45.47 (1,155)
B 51.0 (1,295)
C 8.50 (216)
D 103 (2,612)
E 44 (1,117)
Figure 1. WBH16EAWD Dimensions
PAGE 16 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
Dimension
in. (mm)
GENERAL INFORMATION
The MQ Whiteman Power Buggy, Model WBH-16EAWD
(recoil/electric start) is intended for the transportation of
concrete, concrete spreading and spot pouring. In addition,
this power buggy is designed for landscaping applications,
material sub-base distribution, job site cleanup and material
transport.
The Power Buggy is equipped with a 6-inch dump height
which provides clearance and enables the operator to
maneuver over any form height. In addition, it has a unique
polyethylene tub design that reduces concrete splatter.
A low center of gravity has been incorporated into the
design which provides added safety when maneuvering
the buggy in tight areas. A 4.8 gallon (18.1 liters) fuel tank
allows for extended uninterrupted use. Maximum speed of
the power buggy is rated at 7.25 mph (11.7 km/h).
The maximum weight capacity of the Power Buggy is
2,500 lbs. (1,134 kg).
Hand and foot controls are provided for ease of dumping
and stopping of the power buggy. Multiple lift points have
been provided to allow for easy access of a forklift when
lifting is required.
The WBH-16EAWD is powered by a Briggs and Stratton
Vanguard twin cylinder, air cooled gasoline engine rated
at 18 HP at 3600 RPM.
The engine drives a variable displacement hydrostatic
transmission which is activated by a cable controlled
hand lever. The hydraulic fluid flows to a divider valve
which directs the fluid to the forward reverse and dumping
systems.
The operator controls the forward and reverse machine
travel by manually shifting the control valve which directs
the hydraulic fluid flow to the two drive wheel motors. The
flow to the dump cylinder is also controlled by a manually
operated control valve.
This hydraulic system uses a parallel loop configuration,
operating at a maximum of 2100 PSI (14,478 kPa). The
system also features a neutral position which allows the
power buggy to be moved in the event of an emergency.
The hydraulic oil is filtered by a screen type filter located in
the hydraulic tank, then doubled filtered within the system
by a 10 micron cartridge spin-on return filter.
WARNING
All operators must have training before operating the
power buggy. For your safety, warnings are on the
machine and in this manual. Failure to obey these
warnings can cause severe injury or even death.
CAUTION
DO NOT attempt to operate the power
buggy until the Safety Information, General
Information, and Inspection sections of this
manual have been read and thoroughly
understood.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 17
Figure 2. WBH16EAWD Power Buggy
Components
1. Tub or Bucket — Used for the transportation of
material. Tub holds approximately 16 cubic feet
(0.59 cubic yards) of water.
2. Handle Bar (Steering) — This handle bar is used
to steer the buggy. When driving the buggy, use both
hands and hold onto both handle bar grips.
3. Fuel Tank/Cap — Remove this cap to add fuel. Tank
holds approximately 4.8 U.S. gallons (18.1 liters). DO
NOT over fill. Tighten cap until you hear "clicking".
4. Fuel Valve Lever — When placed in the ON position
fuel will flow. OFF position stops fuel flow. ALWAYS
place this lever in the ON position when starting the
engine. When machine is not in use, place this lever
in the OFF position.
5. Kill Switch — In the event of an emergency, press this
button to stop the engine.
6. Speed Control — Sets the power buggy's travel speed.
When fully depressed, the buggy will be at FULL speed.
When released, the buggy will STOP.
7. AWD/2WD Toggle Switch — Use when AWD is
needed for extended period of time. Toggle the switch
to AWD to engage the system.
8. Documentation Canister — Store and maintain
Operation, Parts, and Engine manuals in this container
at all times.
COMPONENTS
9. Travel Lever — When the travel lever is pushed
forward, the buggy will travel in the forward direction.
Placing the travel lever in the backward position will
cause the buggy to travel in the reverse direction.
Center position is neutral.
10. Parking Brake Lever — When this lever is activated
(pulled up), the parking brake will be set. To release
the brake, pull the lever downwards.
11. Hydraulic Tank/Cap — Remove this cap to add
hydraulic oil. Tank holds approximately 5.3 U.S. gallons
(20.4 liters). DO NOT over fill.
12. Brake Pedal — Press this pedal with the right foot to
stop the buggy.
13. Operator Platform — When the buggy is in use, the
operator shall ALWAYS stand on this platform while
holding onto the handle bar (steering).
14. Dump Pedal — Use this pedal to place the tub in the
dump position (vertical). Press pedal a second time to
return tub to the travel position (horizontal).
15. Muffler — Used to reduce noise and emissions.
NEVER touch the muffler while it is hot. Serious burns
can result.
16. Dump Control Lever — Use this lever forward to place
the tub in the dump position (vertical), move the lever
backward to return the tub to travel position (horizontal).
17. Forklift Pockets — Use these fork lift pockets to lift
the power buggy with a forklift. Remember to insert the
forks of the fork lift a minimum of 24 inches (610 mm.)
into power buggy's fork lift pockets.
18. Charcoal Canister — Charcoal activated system
that absorbs or traps fuel vapors. Basic component
of evaporative emissions control systems.
19. Battery — Always use gloves and eye protection when
handling the battery.
20. Traction Assist Button — Engaging the traction
assist system while in AWD mode provides enhanced
traction control.
21. Towing Hook — Use this hook to tow the buggy if it
gets stuck. This hook is NOT intended for towing the
buggy on public roads at high speeds.
NOTICE
The traction assist switch is not intended for extended
use as it may cause increased hydraulic temperature
and cause damage to the machine.
PAGE 18 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
Figure 3. Briggs & Stratton Vanguard 18HP Engine
BASIC ENGINE
1. Air Filter — Prevents dirt and other debris from
entering the fuel system. Release the latches on
the sides of the air filter cover to gain access to filter
element.
NOTICE
Operating the engine without an air filter or with a
damaged or worn air filter will allow dirt to enter the
engine causing rapid engine wear.
2. Lifting Hook — Attach a rope or chain to this lifting
point to lift engine.
3. Oil Fill Cap — Remove cap to refill or replace oil with
recommended type as listed in Table 4. Make sure cap
is tightened securely. DO NOT over fill.
4. Oil Dipstick — Remove to check amount and condition
of oil in crankcase.
5. In-Line Fuel Filter — Filters fuel for contaminants.
Replace as recommended in the maintenance section
of this manual.
6. Fuel Pump — Draws fuel from the fuel tank into the
engine.
7. Spark Plugs — Provides spark to the ignition system.
Set spark plug gap to 0.70- 0.76 mm (0.028 - 0.030 in.)
Clean spark plug once a week.
8. Electric Starter — Starts engine when ignition key is
rotated to the ON position.
9. Oil Drain Plug — Remove to drain crankcase oil.
10. Engine — This machine uses an electric start Briggs
& Stratton 18HP Vanguard engine.
11. Recoil Starter (pull rope) — Manual-starting method.
Pull the starter grip until resistance is felt, then pull
briskly and smoothly.
12. Throttle Lever — Used to adjust engine RPM speed
(lever advanced forward SLOW, lever back toward
operator FAST).
13. Oil Filter — Prevents dirt and other debris from entering
the engine. Service the oil filter as recommended in the
maintenance section of this manual
14. Choke Lever — Used in the starting of a cold engine,
or in cold weather conditions. The choke enriches the
fuel mixture.
15. Ignition Switch/Keys — Insert the ignition key here
to start the engine. Turn the key clockwise to the ON
position then continue turning clockwise to the START
position and release. To stop the engine, turn the key
fully counterclockwise to the STOP position.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 19
BEFORE STARTING
1. Read safety information at the beginning of manual.
2. Clean the machine, removing dirt and dust, particularly
the engine cooling air inlet, carburetor and air cleaner.
3. Check the air filter for dirt and dust. If air filter is dirty,
replace air filter with a new one.
INSPECTION
Figure 5. Engine Oil Level
4. Check carburetor for external dirt and dust. Clean with
dry compressed air.
5. Check fastening nuts and bolts for tightness.
ENGINE OIL CHECK
1. To check the engine oil level, place the buggy on secure
level ground with the engine stopped.
2. Remove the dipstick from its holder (Figure 4) and
wipe it clean.
6. When checking the engine oil, be sure to check if the oil
is clean. If the oil is not clean, drain the oil by removing
the oil drain plug, and refill with the specified amount
of oil as outlined in the maintanence section of this
manual. Oil should be warm before draining.
Table 4. Oil Type
Season Temperature Oil Type
Summer 25°C or Higher SAE 10W-30
Spring/Fall 25°C~10°C SAE 10W-30/20
Winter 0°C or Lower SAE 10W-10
FUEL CHECK
DANGER
Motor fuels are highly flammable and can
be dangerous if mishandled. DO NOT
smoke while refueling. DO NOT attempt
to refuel the buggy if the engine is hot or
running.
Figure 4. Engine Oil Dipstick Removal
3. Reinsert the dipstick back into its holder then remove.
Check the oil level shown on the dipstick.
4. If the oil level is low, remove the oil fill cap (Figure 4)
and fill the engine crankcase with lubricating oil through
the oil filler hole, but DO NOT overfill.
5. Make sure the buggy is level and verify that the oil level
is maintained between the two notches (Figure 5) as
shown on the dipstick. Reference Table 4 for proper
selection of engine oil.
PAGE 20 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
1. Remove the fuel cap (Figure 6) located on top of fuel
tank.
Figure 6. Fuel Tank
2. Visually inspect to see if fuel level is low. If fuel level is
low, replenish with unleaded fuel.
3. When refueling, be sure to use a strainer for filtration.
DO NOT top-off fuel. Wipe up any spilled fuel
immediately. Reinstall fuel cap.
INSPECTION
BATTERY
This unit is of negative ground, DO NOT connect in reverse.
ALWAYS maintain battery fluid level between the specified
marks. Battery life will be shortened, if the fluid level are
not properly maintained. Add only distilled water when
replenishment is necessary.
DO NOT over fill. Check to see whether the battery cables
are loose. Poor contact may result in poor starting or
malfunctions.
ALWAYS keep the terminals firmly tightened. Coating the
terminals with an approved battery terminal treatment
compound. Replace battery with only recommended type
battery. The battery type used in this power buggy is BCI
Group U1.
The battery is sufficiently charged if the specific gravity
of the battery fluid is 1.28 (at 68° F). If the specific gravity
should fall to 1.245 or lower, it indicates that the battery is
dead and needs to be recharged or replaced.
Before charging the battery with an external electric source,
be sure to disconnect the battery cables.
CAUTION
ALWAYS disconnect the negative terminal FIRST and
reconnect negative terminal LAST.
Battery Cable Installation
When connecting battery do the following:
1. NEVER connect the battery cables to the battery
terminals when the ignition is in the ON position (start).
2. Place a small amount of battery terminal treatment
compound around both battery terminals. This will
ensure a good connection and will help prevent
corrosion around the battery terminals.
NOTICE
If the battery cable is connected incorrectly, electrical
damage to the power buggy will occur. Pay close attention
to the polarity of the battery when connecting the battery.
CAUTION
Inadequate battery connections may cause poor
starting of the power buggy, and create other
malfunctions.
TIRE PRESSURE CHECK
The wheels and tires of the power buggy are very important
in its effective operation.
1. Check the tires regularly to make certain the lugs nuts
are tight.
2. Make sure tires are inflated to manufacturer's
suggested tire pressure. DO NOT operate the buggy
with bad or worn tires.
ALWAYS be sure the battery cables (Figure 7) are properly
connected to the battery terminals as shown below. The red
cable is connected to the positive terminal of the battery,
and the black cable is connected to the negative terminal
of the battery.
NEGATIVE
POSITIVE
Figure 7. Battery Connections
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 21
PARKING BRAKE CHECK
Check the brakes as outlined in the maintenance section
of this manual.
LINKAGE CHECK
Check and make sure that all linkages within the buggy are
functioning correctly.
STEERING CHECK
1. Check and make sure that the power buggy's steering
turns freely and that there is no binding.
2. Make sure that the zerk fitting for the steering has
been lubricated.
DUMP CYLINDER CHECK
1. Check the power buggy's dump cylinder as outlined in
the operation section of this manual.
2. Make sure that both zerk fittings for the dump cylinder
have been lubricated.
HYDRAULIC OIL CHECK
3. Visually read the hydraulic sight glass (Figure 8) to see
if the hydraulic oil level is low.
4. If the hydraulic oil is low, add enough hydraulic oil to
bring oil level to a normal safe operating level.
INSPECTION
Figure 8. Hydraulic Sight Glass
PAGE 22 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
OPERATION
FORWARD
NEUTRAL
REVERSE
CAUTION
DO NOT attempt to operate the power
buggy until the Safety Information, General
Information, and Inspection sections of this
manual have been read and thoroughly
understood.
ELECTRIC START (METHOD)
1. Before attempting to start the power buggy, make sure
that the safety kill switch (Figure 9) is not pushed
in. The power buggy will not start with the kill switch
engaged.
KILL SWITCH
(PULL)
4. If starting a cold engine, push the choke lever inward
(Figure 12) to the CLOSED position.
Figure 12. Engine Choke Lever (Closed)
NOTICE
The CLOSED position of the choke lever enriches
the fuel mixture for starting a cold engine. The OPEN
position provides the correct fuel mixture for normal
operation after starting, and for restarting a warm
engine.
5. If starting a warm engine or the temperature is warm,
pull the choke lever outward (Figure 13) to the OPEN
position.
Figure 9. Kill Switch OFF
2. Place the travel control lever (Figure 10) in the
NEUTRAL position.
Figure 10. Travel Control Lever
3. Place the fuel tank ON/OFF valve (Figure 11) in the ON
position.
Figure 13. Engine Choke Lever (Open)
6. Move the throttle lever halfway between the FAST and
SLOW position (Figure 14) for starting.
Figure 14. Throttle Lever
Figure 11. Fuel Tank ON/OFF Valve (ON)
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 23
OPERATION
7. Place the ignition key (Figure 15 ) in the START position
and hold it until the engine starts. When the engine
starts, release the key, allowing it to return back to the
ON position.
F
F
O
O
N
S
T
A
R
T
Figure 15. Engine ON/OFF Switch
(Electric Start)
8. Make sure the choke lever is placed in the OPEN
position (Figure 13) before operating the power buggy.
Before the buggy is placed into operation, run the
engine for several minutes. Check for fuel leaks, and
noises that would associate with a loose guard or cover.
3. After the engine has started and warmed, slowly pull
the choke lever outward to the OPEN position.
4. If the engine has not started, repeat steps 1 through 3.
PRE-CHECK
1. Engage the parking brake lever (Figure 17) and attempt
to rock the buggy back and forth. If the wheels turn
during the rocking motion, adjust the brakes as outlined
in the maintenance section of this manual.
RECOIL START (METHOD)
1. Follow steps 1 through 5 of the Electric Start procedure.
2. Grasp the starter grip (Figure 16) and slowly pull it
out. The resistance becomes the hardest at a certain
position, corresponding to the compression point. Pull
the starter grip briskly and smoothly for starting.
STARTER
GRIP
FAST
SLOW
Figure 16. Starter Grip
NOTICE
DO NOT pull the starter rope all the way to the end.
DO NOT release the starter rope after pulling. Allow it
to rewind as soon as possible.
Figure 17. Parking Brake Lever
2. Place the engine's throttle lever (Figure 14) in the slow
(idle) position.
3. Check the speed control lever (Figure 18) located on
the right side of the handle bar. The speed control
should work freely when squeezed by hand, and return
to the neutral position when released.
Figure 18. Speed Control Lever
PAGE 24 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
OPERATION
PARKING BRAKE/DIRECTION LEVER
Before the power buggy can be put into operational use,
it is best to perform a test run to make certain that all
components are functioning properly.
1. Place the buggy on flat solid ground.
2. Engage the parking brake lever.
3. Place the engine's throttle control (Figure 14) in the
SLOW (idle) position.
4. Place the power buggy's direction lever (Figure 19) in
the forward direction.
TRACTION ASSIST SYSTEM SWITCH
When using the power buggy, it might become necessary to
engage the traction assist system to provide a temporary
boost of traction and power while moving through muddy
or rough terrain.
NOTICE
The traction assist switch is not intended for extended
use as it may cause an increase hydraulic temperature
and cause damage to the machine.
1. Press and hold the traction assist switch (Figure 20)
on the left hand side of the handle bar to engage the
traction assist system.
Figure 19. Direction Lever
5. Slowly squeeze the speed control lever slightly
(Figure 18), for a short period of time to test the brake
holding capacity. If the buggy moves forward, adjust
the brakes as outlined in the maintenance section of
this manual.
6. If the buggy does not move forward, release the
speed control, and disengage the parking brake. If
the buggy creeps forward or reverse while the parking
brake is disengaged, the machine will require service
adjustment of the pump control lever as outlined in the
maintenance section of this manual.
Figure 20. Traction Assist Switch
2. Release the switch to return to normal operation.
ALL-WHEEL DRIVE (AWD) SYSTEM
When operating the WBH16EAWD in rough or uneven
terrain, use the AWD/2WD switch (Figure 21) on the right
hand side of the operator's console.
Figure 21. AWD Switch
1. Set the switch to the AWD position to engage and lock
the AWD system in place.
2. Set the switch to the 2WD position to return the buggy
to normal operation.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 25
OPERATION
TRAVELING
1. With the engine running and parking brake released,
place the direction lever (Figure 19) in the forward
direction.
2. Squeeze the speed control lever (Figure 18) slightly
until the buggy begins to move in a forward direction.
Initially, let the buggy travel at about 3 MPH.
3. When using the buggy for the first time, test the brake.
With the right foot, step up and place it on the brake
pedal (Figure 22). Gradually apply pressure to the
brake pedal until the buggy comes to rest.
STEERING
To steer the buggy, use the handle bar in front of the
operator platform.
1. To turn left when traveling in the forward direction, turn
the handle bar clockwise (Figure 23).
Figure 22. Brake Pedal
4. Test the brake at different speeds until you are
comfortable with stopping the buggy. If the brakes
do not seem to stop the buggy adequately, refer to
the maintenance section of this manual for brake
adjustment instructions.
5. When starting and stopping is confirmed to be
functioning properly, the buggy is ready for operation.
Figure 23. Steering the Buggy
2. To turn right when traveling in the forward direction,
turn the handle bar in the counterclockwise direction.
CAUTION
DO NOT steer the buggy left or right when traveling up
or down on a grade. Travel in a straight path.
CAUTION
Avoid sudden and quick turns. When steering, turn
the handle bar slowly. Always face the controls when
traveling.
PAGE 26 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
TRAVELING ON A SLOPE
5
0
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
10%
6°
GRADE (DEGREES)
PERCENT GRADE
70%
35°
100%
45°
0
LEVEL BASE LINE
DISTANCE (D)
% GRADE = 100 (H¸D)
HEIGHT (H)
DISTANCE (D)
% GRADE = 100 (H¸D)
HEIGHT (H)
5
0
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
10%
6°
GRADE (DEGREES)
PERCENT GRADE
70%
35°
100%
45°
0
DIRECTION OF TRAVEL
DIRECTION
OF TRAVEL
WBH16
AWD
OPERATION
1. When traveling on a slope, it is necessary to determine
the grade of the path. The WBH16EAWD can travel up,
down on a maximum grade of 10% (6°). DO NOT travel
on steeper slopes.
To determine the % grade of your path of travel, use
the formula and graph in Figure 24.
CORRECT
DIRECTION
FOR TRAVELING
DOWN A SLOPE
WITH LOAD.
WBH16
WBH16
CORRECT
DIRECTION
FOR TRAVELING
UP A SLOPE
WITH LOAD.
Figure 25. Slope Travel Direction
TUB (BUCKET) DUMPING
The hydraulic dump can be controlled by the hand dump
control lever or foot dump pedal.
1. To place the tub in the vertical position (Figure 26)
press down on the dump pedal or move the dump
control lever forward. The tub will move to the vertical
position as long as pressure is continuously applied
to the dump pedal or the dump control lever is held in
the forward position.
NOTICE
When traveling on slopes with a loaded tub, ensure the
tub is positioned on the uphill end of the buggy, and the
operator is on the downhill end of the buggy (Figure 25).
Figure 24. Determining Grade of Slope
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 27
Figure 26. Tub Vertical Position
OPERATION
NOTICE
DO NOT activate dump mechanism (tub/bucket) if
buggy is facing down hill. The possibility exist of the
buggy tipping over causing equipment damage and
severe bodily harm.
NOTICE
Releasing either one (dump control lever or pedal)
before dump is completed, will cause the tub to return
to the horizontal position.
2. To return the tub to the horizontal position (Figure 27),
simply release the dump control lever or remove your
foot from the dump pedal.
SHUTDOWN (NORMAL)
Correct shutdown is important to safe operation. Follow
these general steps:
1. Come to a full stop.
2. Engage the parking brake (Figure 17).
3. Place the throttle lever (Figure 14) in the slow position.
Idle engine 3-5 minutes for gradual cooling.
4. Place the ignition switch key in the OFF position.
5. Place the fuel valve lever in the OFF position
6. Cycle hydraulic controls to eliminate residual pressure.
7. Remove ignition key.
8. Block wheels if on a slope or incline.
EMERGENCY SHUTDOWN
This power buggy is equipped with a safety kill switch. This
switch is located on the right side of the handle bar.
Figure 27. Tub Horizontal Position
1. Push the power buggy's kill switch inward (Figure 28)
and listen for the engine to stop.
Figure 28. Safety Kill Switch
2. Engage the parking brake (Figure 17).
3. Place the ignition switch key in the OFF position.
PAGE 28 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
Table 5. Engine Maintenance Schedule
MAINTENANCE
EVERY
YEAR
OR 300
HRS.
DESCRIPTION
(3)
OPERATION
BEFORE
EACH
USE
FIRST
MONTH OR
25 HRS.
EVERY 6
MONTHS
OR 100
HRS.
Check X
Engine Oil
Change X X
Engine Oil Filter Replace Every 100 Hrs.
Check X
Air Cleaner
Clean X (1)
Change X X (*)
Check/Adjust X
Spark Plugs
Replace X
Cooling Fins Clean X
Fuel Filter Replace X (2)
Fuel Tube Check Every 2 years (replace if necessary) (2)
* - Replace the paper filter element only.
(1) Service more frequently when used in DUSTY areas.
EVERY 2
YEARS OR
500 HRS.
(2) These items should be serviced by your service dealer, unless you have the proper tools and are mechanically proficient.
Refer to the Briggs & Stratton, Vanguard Shop Manual for service procedures.
(3) For commercial use, log hours of operation to determine proper maintenance intervals.
Table 6. Power Buggy Maintenance Schedule
Periodic Maintenance Interval
Check Item OPERATION DAILY
Every
25 Hrs
Every
50 Hrs
Every
100-125
Hrs
Every 200
Hrs
Dump Cylinder Grease X
Steering Bearing Flange Grease X
Tub Bearing Pivot Block Grease X
Tub Clean X X
Tub For Cracks/Deformations Check X
Tires For Severe Cuts/Wear Check X
Hydraulic Oil Level Check X X
Hydraulic Oil Replace X
Hydraulic Oil System Check X 1st time X
Brakes Check X
Fastners Check X
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 29
MAINTENANCE
When performing any maintenance on the power buggy
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.
WARNING
Some maintenance operations may
require the engine to be run. Ensure
that the maintenance area is well
ventilated. Exhaust contains poisonous
carbon monoxide gas that can cause
unconsciousness and may result in
DEATH
AIR CLEANER (100 HOURS)
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 latch tabs (Figure 29) on each side of the
air cleaner cover, and remove cover.
NOTICE
Operating the engine with loose or damaged air cleaner
components could allow unfiltered air into the engine
causing premature wear and failure.
CAUTION
Wear protective equipment such as
approved safety glasses or face shields
and dust masks or respirators when
cleaning air filters with compressed air.
CAUTION
ALWAYS allow the engine to cool
before servicing. NEVER attempt any
maintenance work on a hot engine.
CAUTION
Operating the engine with a blocked grass screen, dirty or
plugged cooling fins, and/or cooling shrouds removed will
cause engine damage due to overheating.
DANGER
DO NOT use gasoline as a cleaning solvent to avoid
creating the risk of fire or an explosion.
Figure 29. Air Filter Components
2. Remove knob and plate. Carefully remove air filter to
prevent dirt and debris from entering carburetor.
3. Remove outer foam filter.
4. Remove inner paper filter.
5. Inspect both air filter elements, replace them if
necessary.
PAGE 30 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
MAINTENANCE
6. To clean the paper air filter (Figure 30), tap the filter
element several times on a hard surface to remove
dirt, or blow compressed air [not to exceed 30 psi (207
kPa, 2.1 kgf/cm2)] through the filter element from the
air cleaner case side.
Figure 30. Cleaning Inner Paper Filter
7. NEVER! try to brush off dirt; brushing will force dirt
into the fibers. If the paper element is excessively dirty,
replace element.
8. Clean the foam air filter (Figure 31) element in warm
soapy water, rinse and allow to dry thoroughly or clean
with a nonflammable solvent and allow to dry. DO NOT
pour any type of oil into the foam element.
CHANGING ENGINE OIL (100 HOURS)
1. Drain the engine oil when the oil is warm as shown in
(Figure 32).
2. Remove the oil drain bolt and sealing washer and allow
the oil to drain into a suitable container.
Figure 32. Draining Engine Oil
3. Reinstall drain bolt with sealing washer and tighten
securely.
4. Replace engine oil with recommended type oil as
listed in Table 4. For engine oil capacity, see Table 2.
DO NOT over fill.
OIL FILTER (200 HOURS)
Figure 31. Cleaning Foam Element
9. 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 enter the air chamber that leads to the
carburetor.
10. 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 hook
tabs onto the air cleaner cover.
1. Replace the engine oil filter (Figure 33) every 200 hours.
Figure 33. Oil Filter
2. Be sure to coat the seal of the new oil filter with clean
engine oil.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 31
MAINTENANCE
IN-LINE FUEL FILTER (200 HOURS)
1. Place the fuel tank ON/OFF valve lever (Figure 34) in the
OFF position.
Figure 34. Fuel Tank Valve Lever (OFF)
2. Replace the engine in-line fuel filter (Figure 35) every
200 hours. When replacing filter pay close attention to
the orientation of the arrows.
Figure 35. In-Line Fuel Filter
SPARK PLUG ADJUSTMENT
1. Make sure the engine is cool before servicing the
spark plugs.
2. Disconnect the spark plug caps. Check for dirt and
remove any dirt from around the spark plug area.
3. Remove the spark plugs with a 5/8-inch spark plug
wrench.
4. If the spark plugs are damaged, the sealing washer is
in poor condition, or if the electrode is worn, replace
the spark plugs.
5. Measure the spark plug electrode gap (Figure 37) with
a wire-type feeler gauge. If needed, adjust the gap to
0.7 - 0.8 mm (0.028 - 0.031 in), by carefully bending
the side electrode.
3. Return the fuel tank ON/OFF valve (Figure 36) to the
ON position.
Figure 36. Fuel Tank Valve Lever (ON)
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 37. Spark Plug Gap
6. Install the spark plug carefully, by hand, to avoid cross
threading.
7. After the spark plug is seated, tighten with a 5/8-inch
spark plug wrench to compress the sealing washer.
8. When installing a new spark plug, tighten 1/2 turn, after
the spark plug seats, to compress the washer.
9. When reinstalling the original spark plug, tighten 1/8
to 1/4 turn after the spark plug seats to compress the
washer.
10. Reattach the spark plug caps.
ENGINE TUNE-UP ENGINE
See your engine manual for specific information on tuning up
your engine, checking and gaping the spark plugs, etc.
NOTICE
See the engine manual supplied with your machine
for appropriate engine maintenance schedule and
troubleshooting guide for problems.
PAGE 32 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
MAINTENANCE
ADDING HYDRAULIC OIL
1. Check the hydraulic oil level in the hydraulic oil tank,
by reading the hydraulic oil sight glass (Figure 38)
mounted on the hydraulic oil tank.
Figure 38. Hydraulic Oil Sight Glass
2. If the hydraulic oil level is low, fill to the proper level with
EXXON/MOBIL NUTO H 46 or equivalent.
3. To gain access to the hydraulic oil tank filler hole, the
tub (Figure 39) must be placed in the dump position
(vertical).
4. Start the engine as outlined in the starting procedure,
then place the tub in the dumping position.
5. Use the tub support rod to support the tub, then turn
the engine OFF.
6. Remove the two bolts that secure the access
cover(Figure 40) to the buggy frame.
Figure 40. Access Cover
7. Lift up on access door and secure latch.
8. Remove the hydraulic oil filler cap (Figure 41), and add
hydraulic oil as required. Fill to the normal operating
mark as indicated on the hydraulic oil sight gauge.
HYDRAULIC
OIL ONLY
HYDRAULIC
OIL
HYDRAULIC
OIL TANK
Figure 41. Adding Hydraulic Oil
NOTICE
In climates where temperatures are below 35°F (1.6°C),
Figure 39. Tub Dump Position
Hydraulic Oil Access
hard starting may occur. In these cases, the hydraulic oil
should be switched to a thinner 15 weight hydraulic fluid.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 33
MAINTENANCE
9. Replace hydraulic oil after every 200 hours of operation.
The reservoir capacity is 5.3 gallons (20.4 liters). The
hydraulic oil filter should be changed each time the
hydraulic oil is changed.
HYDRAULIC OIL FILTER REPLACEMENT
1. Replace the hydraulic oil filter (Figure 42) every 200
hours. Replace with only recommended type filter.
HYDRAULIC
OIL FILTER
Figure 42. Hydraulic Oil Filter
Hydraulic Drive Motors
NOTICE
Contact Multiquip's Service Department should any
problems develop with the hydraulic drive motors
BRAKE ADJUSTMENT
Brake adjustment can be made on the brake linkage rod
located on the right-side of the buggy.
1. Place the parking brake lever in the engaged position.
The parking brake should be adjusted so that the buggy
will not move.
2. Adjustment is provided by a knob at the end of the
parking brake lever. To tighten, turn the knob clockwise.
PARKING
BRAKE
LEVER
CW
The hydraulic drive motors (Figure 43) are extremely
reliable and will not need maintenance or repair under
normal conditions.
Figure 43. Hydraulic Drive Motor
KNOB
Figure 44. Parking Brake Adjustment
3. Adjust the knob sufficiently tight so that when the
parking brake lever is pulled upward to the engaged
position (set), there is a sufficient amount of tension.
4. With the parking brake engaged, the buggy should not
move when the engine is started and the travel lever
placed in the forward position.
PAGE 34 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
MAINTENANCE
CHASSIS LUBRICATION
This power buggy is equipped with five zerk fittings
(Figure 45). Lubricate these zerk fittings each day before
operating the buggy.
1. Lubricate with high grade chassis lubricant at all
lubricating points listed below:
• Dump Cylinder Pivots - Two zerk fittings
• Tub Bearing Pivot Blocks (Underside of Tub) - Two
zerk fittings.
• Steering Bearing Flange (Front Side of Handle Bar) One zerk fitting.
PUMP CONTROL LEVER ADJUSTMENT
Inspect the speed control return springs. The tension should
be sufficient to allow lever to snap back when released.
Replace any broken, deformed, or damaged springs.
If the power buggy tends to creep in the forward or reverse
directions after you release the speed control lever, the
pump control lever requires adjustment.
1. Place the machines drive wheels on jacks or blocks
free from ground contact.
2. Locate the pump control lever adjustment bolt
(Figure 46).
Figure 45. Lubrication Points
2. Remove rear wheel hubs and repack bearings after
every 400 hours of operation.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 35
Figure 46. Pump Control Lever Adjustment
3. Loosen the jam nut.
4. Start the engine and place the buggy's directional
control lever in the forward then reverse directions
while observing for wheel movement.
5. The pump lever has a very sensitive neutral position of
about 1/32" to 1/16". If the wheels are creeping, loosen
jam nut and adjusting bolt.
6. Tap lever up or down to determine neutral position.
Tighten both nuts when correct neutral position has
been achieved.
7. If wheels are creeping in reverse, turn the adjusting
bolt counterclockwise. If wheels are creeping forward,
turn the adjusting bolt clockwise
MAINTENANCE
TIRES/WHEELS/LUG NUTS
Tires and wheels are very important and critical components
of the buggy. When specifying or replacing the wheels, it
is important that the wheels, tires, and axle are properly
matched.
CAUTION
DO NOT attempt to repair or modify a wheel. If the rim
is cracked, replace the rim immediately and inspect the
tire for cuts, wear, and deformations.
TIRE WEAR
The tires (Figure 47) used on this power buggy are foam
filled and therefore do not have to be inflated. However
the tires shoud be inspected for cuts, wear and deformity.
Table 7. Tire Torque Requirements
Wheel Size
480 x 8 in. 20-25 35-40 50-65
3. After first road use, retorque all lug nuts in sequence
Check all wheel lug nuts periodically.
First Pass
FT-LBS
Second Pass
FT-LBS
Third Pass
FT-LBS
Figure 47. Tire Inspection
LUG NUT TORQUE REQUIREMENTS
It is extremely important to apply and maintain proper wheel
mounting torque on the trailer. Be sure to use only the
fasteners matched to the cone angle of the wheel. Proper
procedure for attachment of the wheels is as follows:
1. Start all wheel lug nuts by hand.
2. Torque all lug nuts (Figure 48) in sequence. DO NOT
torque the wheel lug nuts all the way down. Tighten
each lug nut in 3 separate passes as defined by Table 7.
Figure 48. Lug Nut Torque Sequence
LONG TERM STORAGE
Drain the fuel tank completely, or add STA-BIL to the fuel.
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.
Remove the battery.
Place fuel valve lever in the OFF position.
Store unit covered with plastic sheet in moisture and
dust-free location out of direct sunlight.
CAUTION
NEVER store the power buggy with fuel in the tank for
any extended period of time. ALWAYS clean up spilled
fuel immediately.
PAGE 36 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
TROUBLESHOOTING
Troubleshooting (Power Buggy)
Symptom Possible Problem Solution
Speed control cable out of adjustment?
Loss of Power.
Loss of Travel.
System Operating Hot.
Slow Dumping.
System jerky when started.
Diffi cult to steer. Un-lubricated steering column? Lubricate steering column.
Parking brake will not hold. Brake linkage out of adjustment? Adjust.
Diffi culty in stopping
Engine will not start.
.
Hydraulic oil level low.? Check hydraulic oil level. Add oil if necessary.
Contaminated hydraulic oil fi lter? Replace hydraulic oil fi lter. Clean system.
Low engine RPM? Check engine speed.
Forward/Reverse lever in neutral position?
Parking brake partially engaged? Release parking brake.
Hydraulic oil level low?
Defective cooling fan? Inspect cooling fan, replace if necessary.
Low engine speed?
Dump cylinder is internally bypassing oil? Replace dump cylinder or seal.
Dump valve pressure low?
Speed cable out of adjustment? Adjust speed control cable.
Defective drive motors? Check drive motors, replace if necessary.
Brakes out of adjustment? Brake lining worn. Replace brake lining.
Low on fuel or fuel tank empty? Add fuel.
Defective kill switch? Check kill switch. Replace if necessary
Engine ON/OFF switch in OFF position? Set engine ON/OFF switch to ON position.
Fuel Shut-off valve CLOSED? Open Fuel shut-off valve.
Adjust speed control cable. Replace cable if
necessary
Place lever in either forward or reverse position.
Check hydraulic motors.
Check hydraulic oil level add hydraulic oil if
necessary.
Check engine speed. Adjust engine speed if
necessary.
Check dump valve relief pressure. Pressure
should be 1000 psi ± 50 psi.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 37
Symptom Possible Problem Solution
Diffi cult to start, fuel is available, but no spark at
spark plug.
Diffi cult to start, fuel is available, and spark is
present at the spark plug.
Diffi cult to start, fuel is available, spark is
present and compression is normal.
Diffi cult to start, fuel is available, spark is
present and compression is low.
No fuel present at carburetor.
TROUBLESHOOTING
Troubleshooting (Engine)
Spark plug bridging? Check gap, insulation or replace spark plug.
Carbon deposit on spark plug? Clean or replace spark plug.
Short circuit due to defi cient spark plug
insulation?
Improper spark plug gap? Set to proper gap.
Spark plug is red? Check transistor ignition unit.
Spark plug is bluish white?
No spark present at tip of spark plug?
No oil? Add oil as required.
Oil pressure alarm lamp blinks upon starting?
(if applicable)
ON/OFF switch is shorted? Check switch wiring, replace switch.
Ignition coil defective? Replace ignition coil.
Improper spark gap, points dirty? Set correct spark gap and clean points.
Condenser insulation worn or short circuiting? Replace condenser.
Spark plug wire broken or short circuiting? Replace defective spark plug wiring.
Wrong fuel type?
Water or dust in fuel system? Flush fuel system.
Air cleaner dirty? Clean or replace air cleaner.
Choke open? Close choke.
Suction/exhaust valve stuck or protruded? Reseat valves.
Piston ring and/or cylinder worn? Replace piston rings and/or piston.
Cylinder head and/or spark plug not tightened
properly?
Head gasket and/or spark plug gasket damaged? Replace head and spark plug gaskets.
No fuel in fuel tank? Fill with correct type of fuel.
Fuel cock does not open properly?
Fuel fi lter/lines clogged? Replace fuel fi lter.
Fuel tank cap breather hole clogged? Clean or replace fuel tank cap.
Air in fuel line? Bleed fuel line.
Check spark plug insulation, replace if worn.
If insuffi cient compression, repair or replace
engine. If injected air leaking, correct leak. If
carburetor jets clogged, clean carburetor.
Check if transistor ignition unit is broken, and
replace defective unit. Check if voltage cord
cracked or broken and replace. Check if spark
plug is fouled and replace.
Check automatic shutdown circuit, oil sensor.
(if applicable)
Flush fuel system, replace with correct type of
fuel.
Torque cylinder head bolts and spark plug.
Apply lubricant to loosen fuel cock lever,
replace if necessary.
PAGE 38 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
Symptom Possible Problem Solution
Weak in power, compression is proper and
does not misfi re.
Weak in power, compression is proper but
misfi res.
Engine overheats.
Rotational speed fl uctuates.
Recoil starter malfunctions. (if applicable)
Starter malfunctions.
Burns too much fuel.
Exhaust color is continuously white.
Exhaust color is continuously black.
Will not start, no power with key ON.
(if applicable)
TROUBLESHOOTING
Troubleshooting (Engine) - continued
Air cleaner dirty? Clean or replace air cleaner.
Improper level in carburetor? Check fl oat adjustment, rebuild carburetor.
Defective spark plug? Clean or replace spark plug.
Improper spark plug? Set to proper gap.
Water in fuel system?
Dirty spark plug? Clean or replace spark plug.
Ignition coil defective? Replace ignition coil.
Wrong type of fuel? Replace with correct type of fuel.
Cooling fi ns dirty? Clean cooling fi ns.
Intake air restricted?
Oil level too low or too high? Adjust oil to proper level.
Governor adjusted incorrectly? Adjust governor.
Governor spring defective? Replace governor spring.
Fuel fl ow restricted? Check entire fuel system for leaks or clogs.
Recoil mechanism clogged with dust and dirt? Clean recoil assembly with soap and water.
Spiral spring loose? Replace spiral spring.
Loose, damaged wiring?
Battery insuffi ciently charged? Recharge or replace battery.
Starter damaged or internally shorted? Replace starter.
Over-accumulation of exhaust products?
Wrong spark plug?
Lubricating oil is wrong viscosity? Replace lubricating oil with correct viscosity.
Worn rings? Replace rings.
Air cleaner clogged? Clean or replace air cleaner.
Choke valve set to incorrect position? Adjust choke valve to correct position.
Carburetor defective, seal on carburetor
broken?
Poor carburetor adjustment, engine runs too
rich?
ON/OFF device not activated ON? Turn on ON/OFF device.
Battery disconnected or discharged?
Ignition switch/wiring defective? Replace ignition switch. Check wiring.
Flush fuel system and replace with correct
type of fuel.
Clear intake of dirt and debris. Replace air
cleaner elements as necessary.
Ensure tight, clean connections on battery
and starter.
Check and clean valves. Check muffl er and
replace if necessary.
Replace spark plug with manufacturer’s
suggested type.
Replace carburetor or seal.
Adjust carburetor.
Check cable connections. Charge or replace
battery.
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 39
HYDRAULIC SYSTEM DIAGRAM
PAGE 40 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
HYDRAULIC
OIL TANK
HYDRAULIC
PUMP
DUMP
VALVE
DUMP
CYLINDER
HYDRAULIC
OIL FILTER
HYDRAULIC HOSE CONNECTIONS
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 41
TRACTION ASSIST WIRING DIAGRAM
PAGE 42 — WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22)
WIRING DIAGRAM (ENGINE)
WBH-16EAWD/DF POWER BUGGY • OPERATION MANUAL — REV. #5 (10/12/22) — PAGE 43
OPERATION MANUAL
HERE’S HOW TO GET HELP
© COPYRIGHT 2022, MULTIQUIP INC.
Multiquip Inc
the MQ logo are registered trademarks of Multiquip Inc. and may not be used, reproduced, or altered without written permission. All other trademarks are the property
of their respective owners and used with permission.
This manual
The information and specifi cations included in this publication were in effect at the time of approval for printing. Illustrations, descriptions, references and technical data contained in
this manual are for guidance only and may not be considered as binding. Multiquip Inc. reserves the right to discontinue or change specifi cations, design or the information published
in this publication at any time without notice and without incurring any obligations.
PLEASE HAVE THE MODEL AND SERIAL
NUMBER ON-HAND WHEN CALLING
UNITED STATES
Multiquip Inc.
(310) 537- 3700
6141 Katella Avenue Suite 200
Cypress, CA 90630
E-MAIL: mq@multiquip.com
WEBSITE: www.multiquip.com
CANADA
Multiquip Multiquip (UK) Limited Head Offi ce
(450) 625-2244
4110 Industriel Boul.
Laval, Quebec, Canada H7L 6V3
E-MAIL : infocanada@multiquip.com
UNITED KINGDOM
0161 339 2223
Unit 2, Northpoint Industrial Estate,
Globe Lane,
Dukinfi eld, Cheshire SK16 4UJ
E-MAIL : sales@multiquip.co.uk
,
MUST accompany the equipment at all times. This manual is considered a permanent part of the equipment and should remain with the unit if resold.
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