MULTIQUIP Whiteman, Whiteman WM70SH5, Whiteman WM70SE, Whiteman WM70PE, Whiteman WM70PH5 Operation Manual

OPERATION MANUAL

SERIES

MODELS

WM70SH5/WM70PH5
WM70SH8/WM70PH8

WM70SE/WM70PE

PLASTER AND MORTAR MIXERS

(HONDA GX160/GX240 SERIES GASOLINE ENGINES

AND 1.5 HP ELECTRIC MOTOR)

Revision #9 (11/04/19)

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 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

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.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 3

WM70 Series
Plaster and Mortar Mixers

Proposition 65 Warning ........................................... 2

Silicosis/Respiratory Warnings ................................ 3

Table of Contents ..................................................... 4

Training Checklist .................................................... 5

Nameplate and Safety Decals ................................. 6

Safety Information ............................................. 7–12

Towing Guidelines ........................................... 13–14

Safety Chain Connection ....................................... 15

Specifications (Mixer) ............................................ 16

Specifications (Engine/Motor) ................................ 17

General Information ............................................... 18

Components (Mixer) ........................................ 20–21

Components (Engine) ............................................ 22

Electric Motor .................................................. 23–24

Inspection ........................................................ 25–27

Operation ......................................................... 28–32

Maintenance (Engine) ..................................... 33–35

Maintenance (Mixer) ........................................ 36–40

Troubleshooting (Mixer) ......................................... 41

Troubleshooting (Electric Motor) ............................ 42

Troubleshooting (Engine) ................................. 43–44

TABLE OF CONTENTS

PAGE 4 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

TRAINING CHECKLIST

Training Checklist

No, Description OK? Date

1

2

3 Fuel system, refueling procedure.

4

5

6 Emergency stop procedures.

7 Machine transport and storage.

Read operation manual

completely.

Machine layout, location of

components, checking of engine

oil levels.

Operation of controls (machine

not running).

Safety controls, safety stop switch

operation.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 5

NAMEPLATE AND SAFETY DECALS

The WM-70 plaster and mortar mixer is equipped with a number of safety decals. These decals are provided for operator
safety and maintenance information. Figure 1 below illustrates these decals as they appear on the machine. Should any
of these decals become unreadable, replacements can be obtained from your dealer or the MQ Parts Department.

WARNING

To avoid injury, you read and

MUST

understand operator’s manual before
using this machine.

Keep safety grate, guards and doors
in place. Shut off engine or electric
motor before inspection or maintenance.

Moving parts can cut and crush.

engine or electric motor

SHUT OFF

before placing hands in mixing drum.

This machine to be operated by qualied
personnel only.Ask for training as needed.

P/N 521229

CAUTION

INSPECT BEFORE TOWING

TIGHTNESS OF WHEELNUTS
TIRE PRESSURE

1. Use manufacturer’s recommended torque values
when tightening wheel lug nuts.

2. Use manufacturer’s recommended tire pressure
values when inating tires. DO NOT exceed
recommended tire pressure.

P/N 521232

CAUTION

DRUM LOCK POSITIONING

SEE OPERATION MANUAL FOR PROPER

DRUM LOCK POSITIONING

LEGEND

REPRESENTS LOCK PIN

REPRESENTS DRUM STOP BLOCK

MIX

TOW

P/N 521231

CABINET

REAR VIEW

MODEL
SERIALNO.

SAFETY
INSTRUCTIONS

1. Read owner’s manual
before operating.

2. Keep unauthorized and untrained
people away from machine during
operation.

3. Make sure all safety devices are in
place before this machine is started.

4. Make sure engine is turned off and
spark plug wire is disconnected before
cleaning the machine.

5. Keep hands and ngers away from
moving objects.

6. Do not operate machine in an enclosed
area, proper ventilation is required.

7. Never leave machine unattended when
operating.

8. Always stop engine and allow engine
to cool before adding fuel or oil.

520935

WARNING

To avoid injury, you read and

MUST

understand operator’s manual before
using this machine.

Keep safety grate, guards and doors
in place. Shut off engine or electric
motor before inspection or maintenance.

Moving parts can cut and crush.

engine or electric motor

SHUT OFF

before placing hands in mixing drum.

This machine to be operated by qualied
personnel only.Ask for training as needed.

INSPECT BEFORE TOWING

TIGHTNESS OF WHEELNUTS
TIRE PRESSURE

1. Use manufacturer’s recommended torque values
when tightening wheel lug nuts.

2. Use manufacturer’s recommended tire pressure
values when inating tires. DO NOT exceed
recommended tire pressure.

P/N 521229

CAUTION

P/N 521232

Figure 1. Nameplate and Safety Decals

PAGE 6 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

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

NOTICE

Addresses practices not related to personal injury.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 7

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
on 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.

ALWAYS check the equipment for loosened threads or

bolts before starting.

DO NOT use the equipment for any purpose other than

its intended purposes or applications.



qualifi ed personnel 18 years of age or older.



safety decals when they become diffi cult to read.



equipment modifi cation will void all warranties.

 NEVER

to the equipment and/or injury to the 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.

MIXER SAFETY

DANGER

 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.

 DO NOT mix fl ammable or explosive substances.

PAGE 8 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

WARNING









ENGINE SAFETY (GASOLINE MODELS ONLY)

Engine fuel exhaust gases contain poisonous carbon
monoxide. This gas is colorless and odorless, and can

The engine of this equipment requires an adequate

operate this equipment

place hands or fingers inside the engine

operate the engine with heat shields or

while the engine is hot. Hot oil will gush out of the oil
tank and severely scald any persons in the general area

Make certain the operator knows how to and is capable

run the engine without an air fi lter or with a dirty

air fi lter. Severe engine damage may occur. Service the

SAFETY INFORMATION

NEVER place your hands inside the drum

while starting or operating this equipment.

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.

Before operating the mixer, ensure that the safety grate

is in position and correctly fi tted.

CAUTION

NEVER lubricate components or attempt service on a

running machine.

NOTICE

ALWAYS keep the machine in proper running condition.

ALWAYS ensure the mixer is on level ground before mixing.

Fix damage to the machine and replace any broken
parts immediately.

ALWAYS store equipment properly when it is not being
used. Equipment should be stored in a clean, dry location
out of the reach of children and unauthorized personnel.

ALWAYS make sure the mixer is clean of dried materials.
DO NOT allow material to build up inside the drum. Keep

the drum, frame and wheels clean. Excess debris can
fall off on the highway and/or build up on the frame and
wheels, creating an unbalanced condition leading to
premature metal fatigue.

DANGER



cause death if inhaled.



free fl ow of cooling air. NEVER
in any enclosed or narrow
area where the free flow
of 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.

WARNING

 DO NOT

compartment when the engine is running.

 NEVER

guards removed.

 Keep fi ngers, hands, hair and clothing away

from all moving parts to prevent injury.

 DO NOT remove the engine oil drain plug

of the mixer.

CAUTION

 NEVER touch the hot exhaust manifold,

muffl er or cylinder. Allow these parts to cool
before servicing the equipment.

DANGEROUS

GAS FUMES



of turning the engine OFF in case of an emergency.

NOTICE

 NEVER

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.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 9

SAFETY INFORMATION

FUEL SAFETY (GASOLINE MODELS ONLY)





GENERATOR SAFETY

If using a generator to power the mixer, refer
to the applicable generator manual safety
information section.

ELECTRIC MOTOR SAFETY
(ELECTRIC MODELS ONLY)





Power Cord/Cable Safety

cables or cords when

connecting the equipment to a generator. Inspect the

Make sure power cables are securely connected.
Incorrect connections may cause electrical shock and

Ensure that cables and cords will not be tripped over or

make certain that the proper power or

allow any person or animal to stand underneath

make sure forklift forks are inserted as far as

possible into the pockets (if applicable) when lifting the mixer.

Tighten the fuel tank cap securely and close the fuel

tie down equipment during transport by

tip the engine to extreme angles during lifting

as this may cause oil to gravitate into the cylinder head,

DANGER

DO NOT start the engine near spilled fuel or combustible

fl uids. Fuel is extremely fl ammable and its vapors can
cause an explosion if ignited.

ALWAYS refuel in a well-ventilated area, away from
sparks and open fl ames.

ALWAYS use extreme caution when working with

fl ammable liquids.

DO NOT fi ll the fuel tank while the engine is running

or hot.

DO NOT overfi ll the tank, since spilled fuel can ignite if it

comes into contact with hot engine parts or sparks from
the ignition system.

Store fuel in appropriate containers, in well-ventilated

areas and away from sparks and fl ames.

NEVER use fuel as a cleaning agent.

DO NOT smoke around or near the

equipment. Fire or explosion could result
from fuel vapors or if fuel is spilled on a
hot engine.

DANGER

 NEVER let power cords or cables lay in water.

 NEVER use damaged or worn

insulation for cuts.

 NEVER grab or touch a live power

cord or cable with wet hands. The
possibility exists of electrical shock,

electrocution or death.



damage to the mixer.

CAUTION



trapped underneath the mixer.

NOTICE

 ALWAYS

extension cord has been selected for the job.

TRANSPORTING SAFETY

NOTICE

Operate the electric motor only at the specifi ed voltage

indicated on the nameplate.

NEVER spray water onto the electric motor.

ALWAYS disconnect the AC power plug from the power

source before moving the mixer.

ALWAYS make sure the ON/OFF switch

on the electric motor is in the OFF position
when not in use and before inserting the
mixer’s power plug into an AC receptacle.

CAUTION

 NEVER

the equipment while lifting.

NOTICE

 ALWAYS

 ALWAYS shut down the engine before transporting.

 NEVER lift the equipment while the engine is running.



cock to prevent fuel from spilling.

 DO NOT lift the machine to unnecessary heights.

 ALWAYS

securing the equipment with rope.

 NEVER

making the engine diffi cult to start.

PAGE 10 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

SAFETY INFORMATION

TOWING SAFETY









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),

pour waste or oil directly onto the ground, down

When the life cycle of this equipment is over, remove
the battery (if equipped) and bring it to an appropriate
facility for lead reclamation. Use safety precautions when

When the life cycle of this equipment is over, it is
recommended that the mixer frame and all other metal

Metal recycling involves the collection of metal from
discarded products and its transformation into raw materials

Recyclers and manufacturers alike promote the process of
recycling metal. Using a metal recycling center promotes

CAUTION

In addition to meeting Department of Transportation
(DOT) safety towing regulations, check your local

county or state safety towing regulations before towing
the mixer.

In order to reduce the possibility of an accident while
transporting the mixer on public roads, ALWAYS make
sure the towing vehicle is mechanically sound and in
good operating condition.

 ALWAYS shut down the engine before transporting and

place the fuel valve in the OFF position.

ALWAYS inspect the hitch and coupling for wear. NEVER

tow a mixer with defective hitches, couplings, chains, etc.

Check the tire air pressure on both towing vehicle and

mixer. Mixer tires should be infl ated to 50 psi cold.
Also check the tire tread wear on the vehicle and mixer.

ALWAYS make sure the mixer is equipped with a safety

chain.

NOTICE

follow the rules below.

 DO NOT

a drain or into any water source.

 Contact your country’s Department of

Public Works or a recycling agency in your
area and arrange for proper disposal of
any electrical components, waste or oil
associated with this equipment.



handling batteries that contain sulfuric acid.

ALWAYS properly attach the mixer’s safety chains to

the towing vehicle.

The maximum speed for highway towing is 55 MPH unless
posted otherwise. Recommended off-road towing is not to
exceed 15 MPH or less depending on type of terrain.

Avoid sudden stops and starts. These can cause skidding
or jackknifi ng. Smooth, gradual starts and stops will
improve towing.

Avoid sharp turns to prevent rolling.

The mixer should be adjusted to a level position at all

times when towing.

Raise and lock the mixer drum in the UP position when

towing.

Place chock blocks underneath the mixer wheels to

prevent rolling while parked.



parts be sent to a recycling center.

to use in manufacturing a new product.

energy cost savings.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 11

EMISSIONS INFORMATION

NOTICE

The gasoline engine used in this equipment has been
designed to reduce harmful levels of carbon monoxide
(CO), hydrocarbons (HC) and nitrogen oxides (NOx)
contained in gasoline exhaust emissions.

This engine has been certifi ed to meet US EPA evaporative
emissions requirements in the installed confi guration.

Attempting to modify or make adjustments to the engine
emission system by unauthorized personnel without proper
training could damage the equipment or create an unsafe
condition.

Additionally, modifying the fuel system may adversely affect
evaporative emissions, resulting in fi nes or other penalties.

Emission Control Label

The emission control label is an integral part of the emission
system and is strictly controlled by regulation(s).

The label must remain with the engine for its entire life.

If a replacement emission label is needed, please contact
your authorized engine distributor.

SAFETY INFORMATION

PAGE 12 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

TOWING GUIDELINES

TOWING SAFETY PRECAUTIONS

NOTICE

Check with your county or state towing safety
regulations department before towing your mixer.

To reduce the possibility of an accident while transporting
the mixer on public roads, ALWAYS make sure that the
mixer towing components and the towing vehicle are in good
operating condition and both units are mechanically sound.

The following recommendations should be used when
towing the mixer:

 Make sure that the hitch and coupling of the towing

vehicle are rated equal to or greater than the trailer gross
vehicle weight rating (GVWR).

 ALWAYS inspect the hitch and coupling for wear. NEVER

tow the mixer with defective hitches, couplings, chains etc.

 CHECK the tire air pressure on both the towing vehicle

and the trailer. Check the tire tread wear on both vehicles.

 Check the wheel mounting lug nuts with a torque wrench.

Torque the lug nuts as described in the Maintenance
section of this manual.

 Check the tightness of the axle mounting hardware.

Torque the suspension hardware as described in the
Maintenance section of this manual.

 Avoid sudden stops and starts. These can cause skidding

or jackknifing. Smooth, gradual starts and stops will
improve gas mileage.

NOTICE

If the mixer tow bar is deformed or damaged, replace
the entire tow bar. NEVER tow the mixer with a defective
tow bar. The possibility exists of the trailer separating
from the towing vehicle.

NOTICE

DO NOT tow or lift the mixer unless the mixing drum
is completely empty.

 ALWAYS make sure the mixer is equipped with a

safety chain.

 ALWAYS attach the trailer’s safety chain to the frame of

the towing vehicle.

 ALWAYS make sure that the towing vehicle’s directional,

backup, and brake lights are working properly.

 Remember that in most cases the maximum speed for

highway towing is 55 mph unless otherwise posted.
Check your local, state and county vehicle towing
requirements before towing your mixer. Recommended
off-road towing speed is 15 mph or less depending on
the type of terrain.

 If the mixer is disconnected from the towing vehicle while

parked, place chock blocks underneath the wheels to
prevent rolling.

 Inflate tires to the correct pressure and inspect tires

for damage or excessive wear. See Table 10 for
tire wear troubleshooting.

 When towing of the mixer is required, place the drum in

the UP (mouth facing upwards) position.

NOTICE

To prevent the drum from tipping, ALWAYS make sure
the drum latch pin (Figure 2) is placed to the RIGHT
(when viewing the mixer from the tow bar end) of the
drum stop block, which is welded to the front of the
drum. Make sure the latch pin is fully engaged (locked).
This will prevent the drum from rotating during transport.

STOP

BLOCK

RIGHT

SIDE

LATCH

PIN

TOW OR LOCKED

POSITION

 Avoid sharp turns to prevent rolling.

 ALWAYS make sure the fuel valve lever is in the OFF

position (gasoline models only).

Figure 2. Drum Latch Pin
(Tow or Locked Position)

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 13

TOW BAR TO VEHICLE (COUPLER ONLY)

1. Check the vehicle hitch ball and the mixer’s coupler for
signs of wear or damage. Replace any parts that are
worn or damaged before towing.

2. Use only a 2-inch ball diameter for the towing vehicle.
This will match the mixer’s 2-inch coupler. Use of any
other ball diameter will create an extremely dangerous
condition which can result in ball failure or separation
of the coupler and ball.

3. After the tow bar has been connected to the mixer
(Figure 3–Figure 6), securely attach the mixer’s coupler
to the hitch ball on the towing vehicle. Make sure the
lock lever is in the DOWN (locked) position and the
safety pin is inserted.

MIXER TOW BAR VEHICLE (PINTLE AND LOOP)

1. Make sure the bumper on the towing vehicle is
equipped to handle either a pintle- or loop-type tow
bar configuration.

TOWING GUIDELINES

2. After the tow bar has been connected to the mixer
(Figure 3–Figure 6), secure either type of tow bar to
the towing vehicle, following state and county towing
regulations.

3. As a minimum, use a 1/2-inch bolt and nyloc nut
(grade 5) when securing either tow bar to the towing
vehicle.

PAGE 14 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

SAFETY CHAIN CONNECTION

CAUTION

NEVER tow the mixer with the safety chain removed.

The safety chain is intended to prevent complete
separation of the mixer from the towing vehicle in the
event of a tow bar failure.

TOW BAR TO MIXER CONNECTION

1. Insert the tow bar (Figure 3) through the round opening

at the bottom of the mixer stand.

TOW BAR

HEX BOLT

(1/2”)

NYLOCK NUT

(1/2”)

4. Loop (cross) the safety chain and place it under the tow
bar. Secure the loop with the safety chain connector
link. See Figure 5.

SAFETY CHAIN

CONNECTOR LINK

Figure 5. Cross Safety Chain

5. Extend the safety chain along the length of the tow
bar and loop it through the tow bar’s connector link
(Figure 6). Remove any excess chain slack.

Figure 3. Insert Tow Bar

2. Align the hole on the tow bar with the hole on the mixer
frame and insert the 1/2-inch bolt (Figure 3) through
the tow bar and frame. Secure the tow bar to the frame
with the 1/2-inch nyloc nut. Tighten to 40 lbf·ft.

3. Route the safety chain through the holes (Figure 4)
located on each side of the mixer stand just above
the tow bar.

HOLE (1)

Figure 4. Attach Safety Chains to Mixer Stand

HOLE (2)

SAFETY CHAIN

TOW BAR

CONNECTOR LINK

CONNECTOR LINK

TO TOWING VEHICLE

Figure 6. Extend Safety Chain

6. Connect the free end (connector link) of the safety
chain to the towing vehicle (Figure 6). It is critical that
the length of the chain be properly adjusted to prevent
the draw bar and the front of the mixer stand from
dropping to the ground (contact) in the event of the draw
bar becoming disconnected from the towing vehicle.

CAUTION

Use a lifting device to lift the tow bar onto the vehicle
coupler. If a lifting device is not available, have two
persons of similar height lift the tow bar. DO NOT
attempt to lift by bending forward. Bend hips and knees
to squat down to the load, keep it close to your body,
and straighten your legs to lift.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 15

SPECIFICATIONS (MIXER)

Table 1. Mixer Specifications

Max. Mixing Capacity 7.0 ft.³ (198 liters)

Bag Capacity 1.5–2.5 bags

Weight 690 lb. (313 kg)

Drive V-belt/gear

Dump Action Manual

B

A

D

C

E

Figure 7. Mixer Dimensions

Table 2. Mixer Dimensions

Reference Letter/Parameter Dimensions in. (cm)

(A) Height – Grate 56.0 (142)

(B) Height – Drum Handle 67.0 (170)

(C) Width – Wheelbase 50.0 (127)

(D) Length – Frame/Jack Stand 67.0 (170)

(E) Length – Frame/Tow Bar 92.0 (234)

Table 3. Noise And Vibration Emissions

Guaranteed ISO 11201:2010 Based Sound Pressure Level at Operator Station in dB(A) TBD

Guaranteed ISO 3744:2010 Based Sound Power Level in dB(A) TBD

NOTES:

1. Sound pressure and power levels are ‘A’-weighted measures per ISO 226:2003 (ANSI S1.4-1981). They are measured with the operating
conditions of the machine which generate the most repeatable but highest values of the sound levels. Under normal circumstances, the sound
level will vary depending on the condition of the material being worked upon.

2. The vibration level indicated is the vector sum of the RMS (root mean square) values of amplitudes on each axis, standardized to an 8-hour
exposure period, and obtained using operating conditions of the machine that generate the most repeatable but highest values in accordance
with the applicable standards for the machine.

PAGE 16 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

SPECIFICATIONS (ENGINE/MOTOR)

Table 4. Engine/Electric Motor Specifications

Model Honda GX160UT1HX2 Honda GX240UT1HA2 Baldor 35L229S302

Type Air-cooled, 4-stroke, OHV, gasoline engine

Bore × Stroke

Displacement 9.95 in.³ (163 cm³) 16.48 in.³ (270 cm³) N/A

Max. Output 4.8 hp (3.6 kW) @ 3,600 rpm 7.9 hp (5.9 kW) @ 3,600 rpm 1.5 hp @ 1,725 rpm

Fuel Tank Capacity 3.3 US quarts (3.1 liters) 5.6 US quarts (5.3 liters) N/A

Fuel Type Unleaded 86 octane or higher gasoline N/A

Lube Oil Capacity 0.61 US quarts (0.58 liters) 1.16 US quarts (1.1 liters) N/A

Speed Control Method Centrifugal flyweight type N/A

Starting Method Recoil start Electric start

Input Voltage N/A 120/240 VAC, single-phase

Dimensions
(L × W × H)

Dry Net Weight 33 lb. (15.1 kg) 55.1 lb. (25.0 kg) Approx. 22 lb. (10 kg)

2.68 in. × 1.77 in.
(68 mm × 45 mm)

12.2 × 14.3 × 13.6 in.
(312 × 362 × 346 mm)

2.87 in. × 2.28 in.
(73 mm × 58 mm)

15.0 × 16.9 × 16.6 in.
(380 × 429 × 422 mm)

1.5 hp, 115/230 VAC,
single-phase, electric motor

N/A

13.3 × 8.70 × 9.06 in.
(338 × 220 × 230 mm)

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 17

GENERAL INFORMATION

APPLICATION

This mixer is intended for the mixing of plaster and mortar
only. The mixer must be used for its intended purpose and
is not suitable for the mixing of flammable or explosive
substances. The mixer must not be used in an explosive

atmosphere.

The drum capacity of this mixer is 7 cubic feet (198 liters)
with a batch capacity of 1.5 to 2.5 bags. The mixer has
been factory tested and is shipped completely assembled,
ready for use.

POWER PLANTS

The mixer is powered by either a Honda GX160/
GX240 air-cooled, 4-stroke, gasoline engine or a

1.5-horsepower electric motor. Refer to Table 4 for

engine/motor specifications.

ELECTRICAL

If the mixer is equipped with an electric motor, make sure
that the power being supplied to the motor corresponds to
the voltage rating label on the motor. Supplying the wrong
voltage to the electric motor will cause severe electrical
damage to the motor.

Always make sure the ON/OFF switch on the electric motor
is in the OFF position before applying power.

When inserting the mixer’s power cord into a receptacle,
it is strongly recommended that a ground fault
circuit interrupter (GFCI) receptacle be used (120 VAC
applications).

HARDWARE

Check all hardware on the mixer before starting. Periodically
inspect all hardware. Loose hardware can contribute
to early component failure and poor performance. Use
Table 5 as general guideline when the torquing of mixer
hardware is required. Remember to keep all mixer hardware
components tight.

Table 5. Hardware Torque

Recommendations

Hardware Diameter Torque (lbf·ft)

5/16" × 18 14

3/8" × 16 24

3/8" × 24 37

1/2" × 13 39

1/2" × 13 (Grade 8) 90

ENGINE MAINTENANCE

For basic engine maintenance, refer to the Engine
Maintenance section in this manual. For more detailed

engine maintenance, refer to the Honda engine owner’s
manual provided with the engine.

OPTIONAL TOW BARS

The mixer can be configured for use with various types of
tow bars (ball, loop or pin). See Figure 8. Contact the MQ
sales department for the desired tow bar.

HLC-1

HPC-1

HBC-1

Figure 8. Optional Tow Bars

PAGE 18 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

NOTES

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 19

COMPONENTS (MIXER)

13

12

14

11

10

1

2

3

4

5

6

7

8

9

15

16

19

17

18

Figure 9. Mixer Components

PAGE 20 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

COMPONENTS (MIXER)

1. Safety Grill — Provided for operator safety. This safety

grill is designed to keep hands and solid objects out
of the mixing drum when in use. This grill should be
closed at all times when the mixer is in use. DO NOT
remove the grill or grill opening bar. Keep the grill clean
by washing it daily.

2. Dump Handle — Pull this handle downward to dump

the contents of the drum. Push the handle upward to
return the drum to its vertical position.

3. Safety Grill Lock Handle — To prevent injury to hands

and arms, the safety grill should ALWAYS be locked
when the mixing of plaster or mortar is required. The
safety grill should also be locked when transporting the
mixer. The safety grill should only be unlocked when
cleaning of the blades and drum is required.

4. Pivot Point/Zerk Fitting — There is a Zerk grease

fitting on each end of the mixing drum. These fittings
lubricate the dumping mechanism. Lubricate both
fittings at least once a month or when the drum
becomes difficult to position.

5. Drum Head Seal/Zerk Fitting — There is a Zerk

grease fitting on each end of the mixing drum. Lubricate
both fittings (drum head seals) every 40 hours of
operation.

6. Drum Bearing — There is a sealed bearing on

each end of the mixing drum. Bearings are packed
and sealed at the factory and require no further
maintenance.

7. Drum Lock Pin — Place the pin in the locked position

before towing. Prevents the drum from tipping.

10. Chock Blocks (Option) — When the mixer is not
connected to the towing vehicle, place these blocks
(not included as part of the mixer package) under each
mixer wheel to prevent rolling.

11. Rigid Suspension — This mixer uses a rigid-type
suspension. Check the mounting hardware for bolt
hole elongation and tightness. See the Maintenance
section of this manual for recommended maintenance.

12. Tires — The tire ply (layers) number is rated in letters.
This mixer uses 13-inch, 4-ply tires. Replace with only
recommended type tires.

13. Cabinet/Latch — Encloses the engine or electric
motor. NEVER run the mixer with the cabinet open. Use
the latches to secure the engine compartment cabinet.

14. Engine Emergency Stop Switch — This pushbutton
switch is located on the side of the mixer frame. When
activated it will shut down the engine. Pull this switch
outward when starting the engine.

15. Mixing Paddles — This mixer uses rubber mixing
paddles for the mixing of plaster and mortar. ALWAYS
clean the paddles after each use.

16. Bag Cutter — This feature allows mixing bags to be
opened easily, therefore allowing the contents of the
bag to fall directly into the mixing drum.

17. Engine Cover — Lift this cover to gain access to the
engine or electric motor.

18. Belt Slip Lever — Placing this lever in the mix position
will tension V-belts which will enable the paddle shaft
to rotate.

8. Tow Bar/Coupler — This mixer uses various towing
bars. Refer to the Frame Assembly drawing and parts
list in the mixer parts manual to determine which tow
bar meets your requirements.

9. Safety Chain — This mixer uses a 3/16-inch-thick,
72-inch-long, zinc-plated safety chain. ALWAYS
connect the safety chain when towing.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 21

19. Mixing Drum — Drum capacity is 7.0 cubic feet
(198 liters). Mixing materials such as mortar and plaster
are to be placed into this drum for mixing. ALWAYS
clean the drum after each use. DO NOT use this mixing
drum for the mixing of volatile or hot liquids.

COMPONENTS (ENGINE)

5. Fuel Valve Lever — OPEN to let fuel flow, CLOSE to

2

10

11

9

8

7

6

1

3

5

4

stop the flow of fuel.

6. Oil Drain Bolt — Remove this bolt to drain oil from the
engine’s crankcase.

7. Dipstick/Oil Filler Cap — Remove this cap to
determine if engine oil is low. Add oil through this filler
port as recommended in Table 7.

8. Choke Lever — Used in the starting of a cold engine,
or in cold weather conditions. The choke enriches the
fuel mixture.

9. Spark Plug — Provides spark to the ignition system.
Set the spark plug gap according to the engine
manufacturer’s instructions. Clean the spark plug once
a week.

10. Muffler — Reduces noise and emissions. NEVER
touch when hot!

Figure 10. Engine Components

INITIAL SERVICING

The engine (Figure 10) must be checked for proper
lubrication and filled with fuel prior to operation. Refer to the
manufacturer’s engine manual for instructions and details
on operation and servicing.

1. Throttle Lever — Adjusts engine RPM speed.

2. Fuel Filler Cap/Fuel Tank — Remove this cap to add
unleaded gasoline to the fuel tank. Refer to Table 4
for fuel tank capacity. Make sure the cap is tightened
securely. DO NOT overfill.

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.

11. Air Cleaner — Prevents dirt and other debris from
entering the fuel system. Remove the wing nut on top of
the air filter canister to gain access to the filter element.

NOTICE

Operating the engine without an air filter, with a damaged
air filter, or with a filter in need of replacement will allow
dirt to enter the engine, causing rapid engine wear.

3. Engine ON/OFF Switch — ON position permits engine
starting, OFF position stops engine operation.

4. Recoil Starter (pull rope) — Manual starting method.
Pull the starter grip slowly until resistance is felt, then
pull briskly and smoothly to start the engine.

PAGE 22 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

ELECTRIC MOTOR

CONNECT

TO 120/240 VAC,

60 HZ POWER

SOURCE

NEMA L5-20R

TWIST-LOCK

(120 VAC RECEPTACLE)

NEMA L6-20R

TWIST-LOCK

(240 VAC RECEPTACLE)

NEMA L5-20P

TWIST-LOCK

(120 VAC PLUG)

NEMA L6-20P

TWIST-LOCK

(240 VAC PLUG)

OFF/ON

SWITCH

VOLTAGE

SELECTOR

SWITCH

SINGLE

ON

PHASE

120/240 VAC

ELECTRIC

OFF

MOTOR

GREASE

FITTING

1.5 HP

VOLTAGE

SELECTOR

SWITCH

115

230

Figure 11. Electric Motor

For operation and maintenance of the electric motor, refer
to the electric motor instruction booklet provided with the
motor.

Protect the electric motor from dust as much as possible
and keep ventilating openings clean.

CAUTION

DO NOT spray water at any time on the electric motor.

DO NOT operate the electric motor in an explosive

environment.

120

240

This mixer is equipped with a single-phase, 1.5-horsepower,
120/240 VAC motor (Figure 11) which is factory set at
120 VAC.

CAUTION

ALWAYS make sure that the correct voltage is supplied

to the motor. The input voltage requirements can be
found on the electric motor’s nameplate. Applying
incorrect power to the motor can severely damage the
motor and may cause serious bodily injury!

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 23

ELECTRIC MOTOR

ELECTRIC MOTOR POWER CONNECTIONS

A 12-inch electrical cable (Figure 11) is provided with the
electric motor for connection to a power source.

The electric motor is configured from the factory for
120 VAC grounded operation.

Motors can burn out when the line voltage falls 10% below
the voltage rating of the motor. Failure to use proper voltage
will cause the motor to overheat and actuate the overload
switch.

If overload protection should actuate because of improper
voltage or any other malfunction, turn the main switch on
the motor to the OFF position, correct the problem, press
the reset switch button, then turn the main switch back to
the ON position.

NOTICE

It is strongly recommended that all electrical wiring
be performed by a licensed electrician. Pay special
attention to the nameplate on the electric motor. Make
sure the voltage supplied to the electric motor matches
the required operating voltage printed on the nameplate.

NOTICE

When the input voltage to the electric motor is changed
from 120 VAC to 240 VAC, the plug on the electric motor
power cord must also be changed. See Figure 11 and
Table 6.

Table 6. Electric Motor Wiring Information

120–240 VAC Single-Phase

Motor HP

Rating

1.5 hp

(120 VAC)

1.5 hp

(240 VAC)

NEMA Plug

Connector

L5-20P

P/N EM940537

L6-20P

P/N 940539

Mating NEMA

Connector

L5-20R

P/N EM940538

L6-20R

P/N 940540

NOTICE

ALWAYS make sure the electric motor’s ON/OFF switch
is working properly. When the mixer is not in use, place
the ON/OFF switch in the OFF position and disconnect
the power cord from the power source.

ELECTRIC MOTOR VOLTAGE CHANGE SWITCH

1. ALWAYS make sure the electric motor’s ON/OFF
switch is in the OFF position and the power cord has
been disconnected from the power source.

2. Remove the voltage change lockout bolt and nut
(Figure 12). Change the position of the voltage change
toggle switch from 120 VAC to 240 VAC. The mixer is
factory-wired for 120 VAC operation.

VOLTAGE

CHANGE

LOCK-OUT

BOLT

120

240

Figure 12. Voltage Change Switch

3. Reinstall the voltage change lockout bolt and nut.

VOLTAGE

SELECTOR

SWITCH

VOLTAGE

CHANGE

LOCK-OUT

NUT

CAUTION

NEVER disable or disconnect the ON/OFF switch on

the electric motor. It is provided for operator safety.
Injury may result if it is disabled, disconnected or
improperly maintained.

PAGE 24 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

INSPECTION

BEFORE STARTING

1. Read all safety instructions at the beginning of this

manual.

2. Clean the unit, removing dirt and dust—particularly

the engine cooling air inlet, carburetor and air cleaner.

3. Check the air filter for dirt and dust. Replace the air

filter with a new one if it is excessively dirty.

4. Check the carburetor for external dirt and dust. Clean

with dry compressed air.

5. Check fastening nuts and bolts for tightness.

CAUTION

ALWAYS wear approved eye and hearing

protection while operating the mixer.

CAUTION

NEVER place hands or feet inside the

engine guard cover while the engine is
running. ALWAYS shut the engine down
before performing any kind of maintenance
service on the mixer.

4. If the oil level (Figure 14) is low, fill to the edge of the
oil filler hole with the recommended oil type (Table 7).
Refer to Table 4 for engine oil capacity.

UPPER LIMIT

LOWER LIMIT

Figure 14. Engine Oil Level

Table 7. Engine 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

NOTICE

Refer to the engine manufacturer’s manual for specific
service instructions.

FUEL CHECK

ENGINE OIL CHECK

1. Place the unit on secure, level ground with the engine
stopped.

2. Remove the oil dipstick from the engine oil filler hole
(Figure 13) and wipe it clean.

DIPSTICK

Figure 13. Engine Oil Dipstick

3. Insert and remove the dipstick without screwing it into
the filler neck. Check the oil level shown on the dipstick.

DANGER

If your mixer has a gasoline engine,
determine if engine fuel is low. If
fuel is low, remove the fuel filler cap
and fill with unleaded gasoline.

Motor fuels are highly flammable
and can be dangerous if mishandled. NEVER
smoke while refueling. NEVER attempt to refuel
the mixer while the engine is hot or running.

1. Remove the gasoline cap located on top of the fuel
tank.

2. Visually inspect the fuel level. If fuel is low, replenish
with unleaded gasoline.

3. When refueling, be sure to use a strainer for filtration.
DO NOT top off fuel. Wipe up any spilled fuel
immediately.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 25

CUT

INSPECTION

TIRES

Check for worn or defective tires (Figure 15). Replace any
defective or worn tires immediately.

BALDNESS

MISSING
RUBBER

CRACKS

DEFORMED

Figure 15. Tire Wear

PADDLE BLADE CHECK

Check for worn or defective paddle blades (Figure 16).
Make sure that all blades are adjusted properly. Refer to
the Paddle Blade Adjustment procedure in this manual
(Figure 18). Replace all defective or damaged blades
immediately.

EMERGENCY STOP SWITCH
(GASOLINE ENGINE MODELS ONLY)

The engine emergency stop switch (Figure 17)
should be tested every time the engine is started. See
Starting the Mixer (Gasoline Engine) in the Operation
section for more information.

PUSH

TO STOP

EMERGENCY

STOP SWITCH

Figure 17. Emergency Stop Switch

CAUTION

NEVER disable or disconnect the emergency stop
switch. It is provided for operator safety. Injury may result

if it is disabled, disconnected or improperly maintained.

WORN RUBBER

CRACKS

MISSING
RUBBER

Figure 16. Worn Paddle Blade

PAGE 26 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

PADDLE BLADE ADJUSTMENT

Adjust paddles as shown in Figure 18.

ENGINE END

CAST PADDLE

CENTER TOW END

CAST PADDLE

INSPECTION

CENTER ENGINE END

CAST PADDLE

DRUM END

TOW END

CAST PADDLE

DRUM SIDE

CORRECT INCORRECT

SIDE PADDLE BLADE

ROTATION

Figure 18. Paddle Blade Adjustment

PADDLE BLADE

IS TOO TIGHT

AGAINST DRUM

SIDE WALLS

PADDLE BLADE

AGAINST DRUM

INCORRECT

CORRECT

IS TOO TIGHT

SIDE WALLS

ROTATION

END PADDLE BLADE

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 27

OPERATION

This section is intended to assist the operator with the initial
startup of the mixer. It is extremely important
that this section be read carefully before
attempting to use the mixer in the field.
DO NOT use your mixer until this section is
thoroughly understood.

WARNING

Failure to understand the operation of the mixer could
result in severe personal injury or damage to the mixer.
Refer to Figure 9 and Figure 10 for component locations.

CAUTION

NEVER operate the mixer in a confined

area or enclosed area structure that does
not provide an ample free flow of air.

STARTING THE MIXER (GASOLINE ENGINE)

1. Place the fuel valve lever (Figure 19) in the ON position.

3. Move the throttle lever (Figure 21) away from the slow
position, about 1/3 of the way toward the fast position.

THROTTLE

LEVER

FAST

SLOW

Figure 21. Throttle Lever

4. Locate the emergency stop switch (Figure 22) on the
engine cover. Pull this button outward to allow engine
starting.

PUSH

TO STOP

EMERGENCY

STOP SWITCH

FUEL VALVE

LEVER

OFF

ON

Figure 19. Fuel Valve Lever (ON)

2. If starting a cold engine, place the choke lever
(Figure 20) in the CLOSED position.

CHOKE LEVER

CLOSE

Figure 20. Choke Lever (CLOSED)

OPEN

PULL OUT TO

START

Figure 22. Emergency Stop Switch

(START Position)

5. Turn the engine switch (Figure 23) to the ON position.

OFF

ON

ENGINE SWITCH

Figure 23. Engine ON/OFF Switch (ON)

PAGE 28 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

OPERATION

STARTER GRIP

6. Place the belt slip lever in the START/STOP

(disengaged) position. See Figure 24.

BELT SLIP

LEVER

START-STOP

POSITION

(DOWN)

Figure 24. Belt Slip Lever

(START/STOP Position)

7. Slowly pull the starter grip (Figure 25) until resistance

is felt, then pull briskly and smoothly to start the engine.
Gently return the starter grip to its original position.

8. Once the engine has started, the emergency stop
switch should be tested for proper operation. Press
the emergency stop switch (Figure 26) and observe
that the engine has stopped.

EMERGENCY

STOP SWITCH

PUSH IN TO

STOP

Figure 26. Emergency Stop Switch (STOP)

9. After verifying that the emergency stop switch is
working correctly, repeat the engine starting procedure
to begin mixing.

STARTING THE MIXER (ELECTRIC MOTOR)

Figure 25. Starter Grip

1. Using an appropriately sized extension cord (Table 8),
connect one end of the extension cord to the plug on
the electric motor and connect the other end to the
power source. Make sure the motor is configured for
the proper operating voltage.

NOTICE

Equipment damage can result from low voltage.

Table 8. Recommended Extension Cord Sizes

Electric

Motor

1.5 HP

Input

Voltage

120 VAC No. 12 No. 10 No. 8 No. 6

240 VAC No. 14 No. 12 No. 12 N o. 8

50 ft.

(15.24 m)

75 ft.

(22.86 m)

100 ft.

(30.48 m)

200 ft.

(60.96 m)

NOTICE

Extension cords must be rated Heavy Duty or Extra
Heavy Duty and must be a continuous length.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 29

OPERATION

2. To start the electric motor (Figure 27), place the
ON/OFF switch in the ON position.

OFF/ON
SWITCH

ON

OFF

Figure 27. Electric Motor ON/OFF Switch (ON)

MIXING

1. Pull the drum latch pin (Figure 28) and place it on the
left side (mix position) of the stop block.

NOTICE

Orientation of the drum stop block is viewed from the
tow bar end of the mixer. The stop block is welded to
the front side of the drum.

STOP

BLOCK

3. Place the belt slip lever in the MIX (up) position. This
will tilt the engine, placing tension on the V-belts and
enabling the shaft to rotate. See Figure 29.

BELT SLIP

LEVER

MIX

POSITION

(UP)

Figure 29. Belt Slip Lever (MIX Position)

4. The paddle shaft inside the drum should be rotating at
this time. Add a small amount of water to the mixing
drum (Figure 30).

LEFT

SIDE

LATCH

PIN

MIX POSITION

Figure 28. Drum Latch Pin (Mix Position)

2. Once it has been positioned, release the drum latch
pin. Make sure the pin is fully engaged (locked). The
mixing drum can now be rotated.

Figure 30. Fill Mixing Drum

PAGE 30 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

OPERATION

OFF

5. Lift the mixing bag compound onto the steel safety

grate over the bag cutter and let the contents fall into
the drum (Figure 30). Add more water if desired and
mix the compound to the desired consistency.

DUMPING

CAUTION

NEVER stand in front of or behind the

mixing drum while it is being placed in the
dump position. Stay clear of the mixing
drum while it is being positioned.

1. Pull down on the dump handle (Figure 31) to place the

drum in the dump position.

DUMP

HANDLE

STOPPING THE MIXER (GASOLINE ENGINE)

Normal Shutdown

1. Place the throttle lever in the IDLE (slow) position,
and let the engine idle for 3–5 minutes. See Figure 32.

THROTTLE

LEVER

RUN

Figure 32. Throttle Lever (IDLE)

2. Turn the engine ON/OFF switch (Figure 33) to the
OFF position.

IDLE

MUD TUB

Figure 31. Dump Handle

WARNING

When rotating the
mixing drum from the
dump position to the
upright position, keep

hands clear of the
safety grate. The

possibility exists of
hands or fingers being
crushed.

2. Pull upward on the dump handle (Figure 31) to place
the drum in the upright position.

ON

ENGINE SWITCH

Figure 33. Engine ON/OFF Switch (OFF)

3. Place the fuel valve lever (Figure 34) in the OFF
position.

FUEL VALVE

LEVER

OFF

Figure 34. Fuel Valve Lever (OFF)

ON

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 31

OPERATION

Emergency Shutdown

Push the emergency stop switch inward to the STOP
position (Figure 35).

EMERGENCY

STOP SWITCH

PUSH IN TO

STOP

Figure 35. Emergency Stop Switch (STOP)

STOPPING THE MIXER (ELECTRIC MOTOR)

1. To turn off the electric motor (Figure 36), place the
ON/OFF switch in the OFF position.

CLEANING THE MIXER

After each use, thoroughly clean the entire mixer as
described in the Maintenance section of this manual.

NOTICE

ALWAYS make sure the mixer drum is clean and free
of debris and dried material. DO NOT allow material
to build up inside the drum.

Keep the drum, frame and wheels clean. Excess debris
(buildup of materials) can lead to premature metal fatigue.

OFF/ON

SWITCH

ON

OFF

Figure 36. Electric Motor ON/OFF Switch (OFF)

2. Remove the extension cord from the electric motor
plug.

PAGE 32 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

MAINTENANCE (ENGINE)

Use Table 9 as a general maintenance guideline when servicing your engine. For more detailed engine maintenance
information, refer to the engine owner’s manual supplied with your engine.

Table 9. Engine Maintenance Schedule

Description (3) Operation Before

Engine Oil

Air Cleaner

All Nuts
and Bolts

Spark Plugs

Cooling Fins Check X

Spark Arrester Clean X

Fuel Tank Clean X

Fuel Filter Check X

Idle Speed Check/Adjust X (2)

Valve Clearance Check/Adjust X (2)

Fuel Lines Check Every 2 years (replace if necessary) (2)

Check X

Change X

Check X

Change X (1)

Re-tighten if

necessary

Check/Clean X

Replace X

X

First Month

or 10 Hrs.

Every 3

Months or

25 Hrs.

Every 6

Months or

50 Hrs.

Every Year

or 100 Hrs.

Every 2

Years or

200 Hrs.

(1) Service more frequently when used in dusty areas.

(2) These items should be serviced by your service dealer, unless you have the proper tools and are mechanically
proficient. Refer to the Honda Shop Manual for service procedures.

(3) For commercial use, log hours of operation to determine proper maintenance intervals.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 33

MAINTENANCE (ENGINE)

MAINTENANCE

Perform scheduled maintenance procedures as defined in
Table 9 and below:

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.

WIRING

Inspect the entire mixer for bad or worn electrical wiring or
connections. Replace wiring immediately if any wiring or
connections are exposed (insulation missing).

FUEL STRAINER (IF EQUIPPED)

1. Thoroughly clean the area around the fuel tank cap.

SPARK PLUG

Remove and clean the spark plug (Figure 38). Adjust the
spark plug gap to 0.024–0.028 in. (0.6–0.7 mm). This unit
has electronic ignition, which requires no adjustments.

GAP: 0.024 – 0.028 in.

(0.6 – 0.7 mm)

Figure 38. Spark Plug Gap

ENGINE OIL

NOTICE

FUEL TANK CAP

FUEL STRAINER

Figure 37. Fuel Strainer

2. Remove the fuel tank cap from the fuel tank.

3. Remove, inspect and clean the fuel strainer (Figure 37)
with solvent.

ALWAYS drain the engine oil while the oil is warm.

1. Unscrew the oil filler dipstick (Figure 39) from its holder.

OIL FILLER

DIPSTICK

DRAIN

BOLT

Figure 39. Draining Engine Oil

SEALING
WASHER

2. Remove the oil drain bolt and sealing washer and allow
the oil to drain into a suitable container (Figure 39).

3. Reinstall the drain bolt with sealing washer and tighten
securely.

4. Replace the engine oil with the recommended oil type
listed in Table 7. DO NOT overfill. See Table 4 for engine
oil capacity.

PAGE 34 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

MAINTENANCE (ENGINE)

ENGINE AIR CLEANER

1. Remove the air cleaner cover and foam filter element
as shown in Figure 40.

BLOW COMPRESSED

AIR FROM THE

INSIDE OUT

WING NUT

AIR CLEANER

COVER

FOAM FILTER

ELEMENT

GASKET

PAPER FILTER

ELEMENT

SPARK ARRESTER CLEANING

Clean the spark arrester every 6 months or 100 hours of
operation.

1. Remove the three 4 mm screws securing the exhaust
deflector (Figure 41) to the muffler protector, then
remove the exhaust deflector.

4 MM

SCREW

EXHAUST

DEFLECTOR

MUFFLER

5 MM

SCREW

MUFFLER

PROTECTOR

5 MM

SCREW

Figure 40. Engine Air Cleaner

2. To remove dirt, tap the paper filter element (Figure 40)
several times on a hard surface, or blow compressed
air not exceeding 30 psi (207 kPa, 2.1 kgf/cm²) through
the filter element from the air cleaner case side. NEVER
brush off dirt. Brushing will force dirt into the fibers.
Replace the paper filter element if it is excessively dirty.

3. Clean the foam element in warm, soapy water or
nonflammable solvent. Rinse and dry thoroughly. Dip
the element in clean engine oil and completely squeeze
out the excess oil from the element before installing.

DANGER

To avoid the risk of fire or an explosion, NEVER use
gasoline as a cleaning solvent.

SPARK

ARRESTER

Figure 41. Spark Arrester

2. Remove the four 5 mm screws from the muffler
protector (Figure 41), then remove the muffler protector.

3. Carefully remove carbon deposits from the spark
arrester screen (Figure 42) with a wire brush.

WIRE BRUSH

SPARK ARRESTER

SCREEN

Figure 42. Cleaning the Spark Arrester

4. If the spark arrester has breaks or holes or is otherwise
damaged, replace it with a new one.

5. Reinstall the spark arrester and muffler protector in
reverse order of disassembly.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 35

MAINTENANCE (MIXER)

GREASE FITTING

GREASE FITTING

GREASE FITTING

AND CAP

DRUM HEAD SEALS

There is a set of drum head seals (Figure 43) that
will require lubrication. Lubricate the grease fitting for
each drum seal every 40 hours of operation using
lithium-based grease. Apply grease until visible inside the
mixing drum (i.e. over-grease). This will purge the seal
system of contamination.

AND CAP

HUB

DRUM HEAD

SEALS

TOW END

ENGINE

END

NOTICE

Failure to lubricate the Zerk grease fittings two or three
times a month will cause the dumping mechanism to

stiffen, making the mixer hard to dump.

BALL SOCKET AND CLAMP FACE MAINTENANCE

1. If the towing vehicle is equipped with a ball socket,
smear the socket periodically with multipurpose grease.
This will keep the ball socket well lubricated.

2. Periodically oil the pivot points and clamp face
surfaces of the coupler with SAE 30 motor oil.

3. When parking or storing the mixer, keep the coupler
off the ground so dirt will not build up in the ball socket.

COUNTERSHAFT BEARING LUBRICATION

There is a set of countershaft bearings (Figure 45) that
will require lubrication. Lubricate the grease fitting for each
countershaft bearing every 40 hours of operation using
lithium-based grease.

Figure 43. Grease Fittings (Drum Head Seals)

DRUM SUPPORT BRACKET LUBRICATION

There is a set of drum support brackets (Figure 44) that will
require lubrication. These brackets are intended to make
the drum rotate freely. Lubricate the grease fitting for each
drum support bracket using multipurpose-grade grease

every month or whenever the drum becomes difficult
to position.

AND CAP

DRUM SUPPORT

BRACKET

TOW END

ENGINE

END

Figure 45. Grease Fittings (Countershaft)

Figure 44. Grease Fittings (Dumping Mechanism)

PAGE 36 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

MAINTENANCE (MIXER)

OIL SEAL

CUP

PINION

(MAX. BACKLASH)

WHEEL BEARINGS

1. After every 3 months of operation, remove the hub
dust cap and inspect the wheel bearings (Figure 46).
Once a year, or as needed, disassemble the wheel
hubs and remove the old grease. Then repack the
bearings, forcing grease between the rollers, cone and
cage with a good grade of high-speed wheel bearing
grease. NEVER use grease heavier than 265 ASTM
penetration (‘No. 2’).

CONE BEARING

CONE

BEARING

BEARING

CUP

BEARING

Figure 46. Wheel Hub and Bearings

MAIN GEAR AND DRIVE PINION ALIGNMENT

1. Disconnect the spark plug wire (gasoline engines).
If the mixer is equipped with an electric motor,

disconnect the power cord from the AC power
receptacle. Make sure the clutch engagement lever

is disengaged to relieve V-belt tension.

2. The countershaft and drive pinion are mounted on a
slotted base. To align the drive pinion with the main
gear, loosen the pillow block mounting bolts and move
them until the necessary alignment has been made.
Remember that the gears must be aligned in parallel,
not skewed.

3. Using your hand, slightly move (rock) the drive pulley
back and forth to determine the amount of backlash.
Insert a feeler gauge between the gears to determine
the backlash distance. Backlash should range between

0.007–0.012 inches (Figure 47).

MAIN GEAR

(BULL GEAR)

2. Fill the wheel hub (Figure 46) with grease to the inside
diameter of the outer faces and also fill the hub grease
cap.

3. Reassemble the hub and mount the wheel. To make
sure all of the bearing surfaces are in contact, tighten
the adjusting nut while turning the wheel in both
directions until there is a slight bind.

Back off the adjusting nut 1/6 to 1/4 turn, or to the

nearest locking hole, or sufficiently to allow the wheel
to rotate freely within limits of 0.001–0.010 inches of
end play. Lock the nut at this position. Install the cotter
pin and dust cap and tighten all hardware.

MAIN GEAR

0.007 - 0.012 INCHES

GEAR TEETH

DRIVE

PINION GEAR

Figure 47. Drive Pinion and Main Gear (Backlash)

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 37

MAINTENANCE (MIXER)

MAIN GEAR AND DRIVE PINION TOOTH CONTACT

1. Rotate the drive pulley in both directions.

2. Inspect the tooth pattern.

3. If the gear teeth are not contacting properly (Figure 48),
adjust the pillow block to correct the problem.

HEEL

CONTACT

FACE

CONTACT

PROPER

CONTACT

TOE

CONTACT

Figure 48. Gear Teeth Alignment

FLANK

CONTACT

MIXER CLEANING

NOTICE

It is important that the drum interior remains free of
dried material. Obstructions can cause the paddle
blades to lock against the drum.

1. Make sure the engine or electric motor is stopped.

2. Place the clutch engagement lever in the disengage
position.

8. Rotate the mixer to the dump position and remove
debris.

9. Thoroughly clean the entire mixer, wheels, cabinet
and frame.

NOTICE

NEVER pour or spray water over the engine or electric
motor (Figure 49).

Figure 49. No Spraying of Water

10. When cleaning of the entire mixer is complete, return
the mixing drum to an upright position.

TIRES/WHEELS/LUG NUTS

Tires and wheels are very important and critical components
of the trailer. When specifying or replacing the trailer wheels
it is important that the wheels, tires and axle are properly
matched.

WARNING

3. ALWAYS disconnect the spark plug wire (gasoline
engines) before cleaning the inside of the drum. If the
mixer is equipped with an electric motor, disconnect
the power cord from the AC power source.

4. Place a ‘Do Not Operate’ tag on the mixer.

pieces of the rim to explode (break off) with great

DO NOT attempt to repair or modify a wheel.
DO NOT install an inter-tube to correct a

leak through the rim. If the rim is cracked,
the air pressure in an inter-tube may cause

force which can cause serious eye or bodily injury.

5. Make sure the rear section of the safety grate is
connected to the mixing drum.

6. At the end of operation each day, place the mixer
drum in an upright position and spray the inside of the
tub immediately with water to prevent lumps of dried
mortar or plaster from forming and contaminating
future batches.

Tire Wear/Inflation

Tire inflation pressure is the most important factor for tire
life. Pressure should be checked cold before operation.
DO NOT bleed air from tires when they are hot. Check
inflation pressure weekly during use to ensure maximum
tire life and tread wear.

7. DO NOT allow a buildup of materials to form on the
blades or anywhere inside the drum.

PAGE 38 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

MAINTENANCE (MIXER)

WARNING

ALWAYS wear safety glasses when

removing or installing force-fitted parts.
Failure to comply may result in serious injury.

Table 10 shows causes and solutions of tire wear problems.

Table 10. Tire Wear Troubleshooting

Wear Pattern Cause Solution

Center

Wear

Edge
Wear

Side

Wear

Toe

Wear

Cupping

Flat

Spots

Overinfl ation

Underinfl ation

Loss of
chamber or
overloading

Incorrect
toe-in

Out of
balance

Wheel lockup
and tire
skidding

Adjust pressure to
particular load per
tire manufacturer.

Adjust pressure to
particular load per
tire manufacturer.

Make sure load does
not exceed axle
rating. Align wheels.

Align wheels.

Check bearing
adjustment and
balance tires.

Avoid sudden stops
when possible and
adjust brakes.

Lug Nut Torque Requirements

It is extremely important to apply and maintain proper wheel
mounting torque. Be sure to use only the fasteners matched
to the cone angle of the wheel. The proper procedure for
attachment of the wheels is as follows:

NOTICE

NEVER use a pneumatic air gun to tighten wheel lug nuts.

1

3

4

2

4-LUG NUTS 5-LUG NUTS

1

3

6

4

5

2

6-LUG NUTS 8-LUG NUTS

LUG NUT

TORQUE
WRENCH

Figure 50. Wheel Lug Nuts Tightening Sequence

Table 11. Tire Torque Requirements

Wheel Size

12" 20–25 35–40 50–65

13" 20–25 35–40 50–65

14" 20–25 50–60 90–120

15" 20–25 50–60 90–120

16" 20–25 50–60 90–120

First Pass

lbf·ft

1

3

4

5

2

1

3

6

7

8

5

4

2

PNEUMATIC

AIRGUN

Second Pass

lbf·ft

Third Pass

lbf·ft

1. Start all wheel lug nuts by hand.

3. After the first road use, retorque all lug nuts in

sequence. Check all wheel lug nuts periodically.

2. Torque (tighten) all lug nuts in sequence (Figure 50).

DO NOT torque the wheel lug nuts all the way down.
Torque each lug nut in 3 separate passes as defined
in Table 11.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 39

MAINTENANCE (MIXER)

SUSPENSION

The rigid suspension and associated components (Figure 51)
should be visually inspected monthly for signs of excessive
wear, elongation of bolt holes or loosening of the mounting
bracket. Replace any damaged suspension components
immediately.

LOCK

NUT

MOUNTING

BRACKET

RIGID TYPE

AXLE

FLAT

WASHER

MOUNTING

BOLTS
CHECK FOR
TIGHTNESS

LONG-TERM STORAGE

For storage of the mixer for over 30 days, the following is
recommended:

 Drain the fuel tank completely, or add STA-BIL® to the

fuel.

 Run the engine until the gasoline in the carburetor is

completely consumed.

 Completely drain the oil from the crankcase and refill

with fresh oil.

 Remove the spark plug, pour 2–3 cc of SAE 30 oil into

the cylinder and crank slowly to distribute the oil.

 Slowly rotate the engine a few times with the starter rope

and install a new plug.

 Slowly pull out the starter rope and stop at the

compression point.

 Clean the entire mixer and engine compartment.

 Clean the drum of all debris and foreign matter.

Figure 51. Suspension Components

 Clean all external parts of the mixer with a cloth.

 Cover the mixer and place it a clean, dry area where it

will be protected from harsh elements.

PAGE 40 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

TROUBLESHOOTING (MIXER)

Troubleshooting (Mixer)

Symptom Possible Problem Solution

Paddle blades will not rotate.

Worn or defective main (bull) gear? ¹

Worn or defective pinion gear? ¹

Worn or defective V-belt? ¹ Replace V-belt.

Adjustment lever misaligned? ¹

Material load too heavy, exceeding
mixer capability?

Object stuck inside mixing drum,
jamming paddle rotation?

Improper engine speed? ¹ Check and adjust engine speed.

Engine not running or stalls? ¹ Check engine.

Electric motor not connected? ¹ Check electric motor. Apply power.

Incorrect relief valve pressure? ² Inspect for proper relief pressure.

Defective hydraulic motor or pump? ² Contact MQ Technical Services.

Slow hydraulic cylinder dumping? ² Contact MQ Technical Services.

Contaminated relief cartridge? ³

Check main gear.
Replace if worn or broken.

Check pinion gear.
Replace if worn.

Check position of adjustment lever.
Adjust if necessary.

Reduce amount of material
being mixed.

Stop engine. Empty out drum
contents. Remove obstruction.

Inspect relief pressure.
PRO12 = 1,750 psi
PRO20 = 2,300 psi

Paddle blades rotate too slow.

Material is leaking from drum ends. Worn or defective paddle shaft seals? Replace seals.

Drum is diffi cult to discharge (tilt).

Main (bull) or pinion gear is worn. ¹ Gears out of adjustment?

Gear teeth are not contacting properly. ¹ Worn or damaged pillow block bearings? Adjust or replace pillow block bearings.

¹ If equipped

² Hydraulic models only

³ Models PRO12 and PRO20 only

Mixing paddles slipping under load? Adjust idler wheel tension. ¹

Worn or defective V-belt? ¹ Replace V-belt.

Defective or worn drum support brackets? Apply grease to brackets or replace.

Blades adjusted too tight?

Drum pivot bracket contaminated
with dirt?

Adjust blades until they almost touch
side walls of drum.

Grease bracket.

Inspect for proper gear backlash.
Inspect that gears are properly centered.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 41

TROUBLESHOOTING (ELECTRIC MOTOR)

Troubleshooting (Electric Motor)

Symptom Possible Cause Solution

Is there power?

Is power cable plugged in? Plug in power cable.

Is ON/OFF switch placed in ON

Electric motor will not start.

Electric motor continuously stops. Reset button OK? Check power source.

Electric motor RPM's too low. Low voltage? Check input voltage.

Electric motor RPM's too high. High voltage? Check input voltage.

position?

Defective electric motor ON/OFF
switch?

Defective motor windings? Repair windings or replace windings.

Defective extension cord? Replace extension cord.

Check power source. Check reset
button.

Place ON/OFF switch in ON position.

Replace switch.

PAGE 42 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

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.

Will not start, no power with key "ON". (if
applicable)

TROUBLESHOOTING (ENGINE)

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.

ON/OFF device not in ON position? Place ON/OFF device in ON posotion.

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 transistor ignition unit is broken, and
replace defective unit. Check if voltage cord is
cracked or broken and replace. Check if spark
plug is fouled. Replace if fouled.

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.

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 43

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)

Burns too much fuel.

Exhaust color is continuously "white".

Exhaust color is continuously "black".

TROUBLESHOOTING (ENGINE)

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.

Spark plug heat value incorrect? Replace with correct type of spark plug.

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.

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?

Flush fuel system and replace with correct
type of fuel.

Clear intake of dirt and debris. Replace air
cleaner elements as necessary.

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.

PAGE 44 — WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19)

NOTES

WM70 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #9 (11/04/19) — PAGE 45

HERE’S HOW TO GET HELP

© COPYRIGHT 2019, 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.

UNITED STATES

Multiquip Inc.

(310) 537- 3700
6141 Katella Avenue Suite 200
Cypress, CA 90630
E-MAIL: [e-mail]
WEBSITE: www.multiquip.com

OPERATION MANUAL

PLEASE HAVE THE MODEL AND SERIAL

NUMBER ON-HAND WHEN CALLING

CANADA

Multiquip Multiquip (UK) Limited Head Offi ce

[phone]
4110 Industriel Boul.
Laval, Quebec, Canada H7L 6V3
E-MAIL : [e-mail]

,

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.

UNITED KINGDOM

0161 339 2223
Unit 2, Northpoint Industrial Estate,
Globe Lane,
Dukinfi eld, Cheshire SK16 4UJ
E-MAIL : [e-mail]