OPERATION AND PARTS MANUAL
SERIES
MODEL EM120 HYDRAULIC
PLASTER/MORTAR MIXER
(HONDA GX390U1QA2 GASOLINE ENGINE)
Revision #1 (09/09/19)
To find the latest revision of this
publication, visit our website at:
www.multiquip.com
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
PROPOSITION 65 WARNING
PAGE 2 — EM120 HYD. PLASTER/MORTAR MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/09/19)
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.
EM120 HYD. PLASTER/MORTAR MIXER• OPERATION AND PARTS MANUAL — REV. #1 (09/09/19) — PAGE 3
TABLE OF CONTENTS
EM120 Hydraulic
Plaster/Mortar Mixer
Proposition 65 Warning ........................................... 2
Silicosis/Respiratory Warnings ................................ 3
Table of Contents ..................................................... 4
Training Checklist .............................................. 5–11
Dimensions/Specifications ..................................... 12
Engine Specifications ............................................ 13
General Information ............................................... 14
Basic Components (Mixer) .................................... 15
Basic Components (Hydraulic) .............................. 16
Engine Components .............................................. 17
Towing Guidelines ................................................. 18
Safety Chain Connection ....................................... 19
Inspection ........................................................ 20–22
Start-Up ................................................................. 23
Start-Up/Operation ................................................ 24
Operation ............................................................... 25
Maintenance (Engine) ..................................... 26–28
Maintenance (Mixer) ........................................ 29–33
Hydraulic System Diagram .................................... 34
Troubleshooting (Mixer) ......................................... 35
Troubleshooting (Engine) ................................. 36–37
Explanation of Code in Remarks Column.............. 38
Suggested Spare Parts ......................................... 39
Component Drawings
Nameplate and Decals Assembly .................... 40–41
Paddle Blades Assembly ................................. 42–43
Drum and Shaft Assembly ............................... 44–45
Paddle Shaft Assembly .................................... 46–47
Hydraulic Assembly ......................................... 48–49
Frame Assembly .............................................. 50–51
Cabinet Assembly ............................................ 52–53
Engine Assembly ............................................. 54–55
Engine Service Parts ....................................... 56–57
NOTICE
Specifications and part numbers are subject to change
without notice.
PAGE 4 — EM120 HYD. PLASTER/MORTAR MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/09/19)
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.
EM120 HYD. PLASTER/MORTAR MIXER• OPERATION AND PARTS MANUAL — REV. #1 (09/09/19) — PAGE 5
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.
or NOTICE.
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.
Symbol Safety Hazard
Lethal exhaust gas hazards
Explosive fuel hazards
Burn hazards
Rotating parts hazards
NOTICE
Hydraulic fluid hazards
Addresses practices not related to personal injury.
PAGE 6 — EM120 HYD. PLASTER/MORTAR MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/09/19)
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.
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 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.
EM120 HYD. PLASTER/MORTAR MIXER• OPERATION AND PARTS MANUAL — REV. #1 (09/09/19) — PAGE 7
SAFETY INFORMATION
MIXER SAFETY
out of the reach of children and unauthorized personnel.
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 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
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.
WARNING
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 mixer, ensure that safety grate is in
position and correctly fi tted.
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.
CAUTION
NEVER lubricate components or attempt service on a
running machine.
NOTICE
ALWAYS keep the machine in proper running condition.
ALWAYS ensure mixer is on level ground before mixing.
DANGER
cause death if inhaled.
free fl ow of cooling air. NEVER
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.
WARNING
DO NOT
compartment when 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 equipment.
of turning the engine OFF in case of an emergency.
DANGEROUS
GAS FUMES
Fix damage to machine and replace any broken parts
immediately.
DO NOT tip mixer onto drum mouth when the drum is
rotating.
Ensure the drum is rotating while fi lling and emptying
the drum.
ALWAYS store equipment properly when it is not being
used. Equipment should be stored in a clean, dry location
PAGE 8 — EM120 HYD. PLASTER/MORTAR MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/09/19)
NOTICE
FUEL SAFETY (GASOLINE MODELS ONLY)
GENERATOR SAFETY
Operate electric motor only at the specifi ed voltage
disconnect AC power plug from power source
cables or cords when
connecting equipment to generator. Inspect for cuts in
Make sure power cables are securely connected.
Incorrect connections may cause electrical shock and
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
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.
SAFETY INFORMATION
(ELECTRIC MODELS ONLY)
If using a generator to power mixer, refer
to applicable generator manual safety
information section.
ELECTRIC MOTOR SAFETY
(ELECTRIC MODELS ONLY)
NOTICE
indicated on the nameplate.
DO NOT spray water onto electric motor.
ALWAYS
before moving mixer.
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 tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or sparks from
the ignition system.
Store fuel in appropriate containers, in well-ventilated
areas and away from sparks and fl ames.
NEVER use fuel as a cleaning agent.
DO NOT smoke around or near the
equipment. Fire or explosion could result
from fuel vapors or if fuel is spilled on a
hot engine.
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.
Power Cord/Cable Safety
DANGER
NEVER let power cords or cables lay in water.
NEVER use damaged or worn
the insulation.
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.
EM120 HYD. PLASTER/MORTAR MIXER• OPERATION AND PARTS MANUAL — REV. #1 (09/09/19) — PAGE 9
CAUTION
TRANSPORTING SAFETY
TOWING SAFETY
Check with your local county or state safety towing
Department of
Transportation (DOT) Safety Towing Regulations,
In order to reduce the possibility of an accident while
make
sure the towing vehicle is mechanically sound and in
NEVER
Check the tire air pressure on both towing vehicle and
Also
safety
attach mixer’s safety chains to towing
unless
posted otherwise. Recommended off-road towing is not to
Avoid sudden stops and starts. This can cause skidding,
or jack-knifi ng. Smooth, gradual starts and stops will
Mixer should be adjusted to a level position at all times
Raise and lock mixer wheel stand in up position when
rolling
SAFETY INFORMATION
Ensure that cables and cords will not be tripped over or
trapped underneath the mixer.
NOTICE
ALWAYS make certain that proper power or extension
cord has been selected for the job.
CAUTION
NEVER allow any person or animal to stand underneath
the equipment while lifting.
NOTICE
ALWAYS make sure forklift forks are inserted into pockets
(if applicable) as far as possible when lifting the mixer.
ALWAYS shutdown engine before transporting.
NEVER lift the equipment while the engine is running.
Tighten fuel tank cap securely and close fuel cock to
prevent fuel from spilling.
DO NOT lift machine to unnecessary heights.
ALWAYS tie down equipment during transport by
securing the equipment with rope.
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.
CAUTION
regulations, in addition to meeting
before towing your mixer.
transporting the mixer on public roads, ALWAYS
good operating condition.
ALWAYS shutdown engine before transporting.
ALWAYS inspect the hitch and coupling for wear.
tow a mixer with defective hitches, couplings, chains, etc.
mixer Mixer tires should be infl ated to 50 psi cold.
check the tire tread wear on the vehicle and mixer.
ALWAYS make sure the mixer is equipped with a
chain.
ALWAYS properly
vehicle.
The maximum speed for highway towing is 55 MPH
exceed 15 MPH or less depending on type of terrain.
improve towing.
Avoid sharp turns to prevent rolling.
PAGE 10 — EM120 HYD. PLASTER/MORTAR MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/09/19)
when towing.
towing.
Place chock blocks underneath wheel to prevent
while parked.
SAFETY INFORMATION
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
The gasoline engine used in this equipment has been
designed to reduce harmful levels of carbon monoxide
(CO), hydrocarbons (HC) and nitrogen oxides (NOx)
This engine has been certifi ed to meet US EPA Evaporative
Attempting to modify or make adjustments to the engine
emmission system by unauthorized personnel without
proper training could damage the equipment or create an
Additionally, modifying the fuel system may adversely affect
evaporative emissions, resulting in fi nes or other penalties.
The emission control label is an integral part of the emission
If a replacement emission label is needed, please contact
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 mixer frame and all other metal
parts be sent to a recycling center.
Metal recycling involves the collection of metal from
discarded products and its transformation into raw
materials to use in manufacturing a new product.
Recyclers and manufacturers alike promote the process
of recycling metal. Using a metal recycling center
promotes energy cost savings.
NOTICE
contained in gasoline exhaust emissions.
emissions requirements in the installed confi guration.
unsafe condition.
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.
EM120 HYD. PLASTER/MORTAR MIXER• OPERATION AND PARTS MANUAL — REV. #1 (09/09/19) — PAGE 11
HBC-1
2-INCH
BALL COUPLER
DIMENSIONS/SPECIFICATIONS
A
B
C
OPTIONAL TOW BARS
APPROXIMATE LENGTH
36IN. (914.4 MM)
HPC-1
1-INCH
PIN COUPLER
HLC-1
LOOP COUPLER
Figure 1. Dimensions
Table 1. EM120 Hyd.
Concrete Mixer Dimensions/Specifications
Reference Letter/Parameter Dimensions in. (mm)
A (Height) 62.5 (1,587)
B (Width) 56 1,422)
C (Length) 82 in. (2,083)
Maximum Mixing Capacity 12 cu. ft. (339.8 liters)
Bag Capacity
Hydraulic Oil Tank Capacity
Hydraulic Oil Type
Weight
Shell Tellius 68, Mobil DFE26 or Texaco Rand HDC
3.5 ~ 4 bags
12 gallons (45 liters)
1,010 lbs. (554 Kg)
PAGE 12 — EM120 HYD. PLASTER/MORTAR MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/09/19)
ENGINE SPECIFICATIONS
Table 3. EM120 Hyd. Noise and Vibration
Guaranteed ISO 11201:2010 Based
Sound Pressure Level at Operator Station in dB(A)
Guaranteed ISO 3744:2010 Based
Sound Power Level in dB(A)
NOTES:
1. Sound Pressure and Power Levels are “A” weighted Measures per ISO 226:2003 (ANSI S1.4-1981). They are measured with the operating
condition of the machine which generates the most repeatable but highest values of the sound levels. Under normal circumstances, the sound
level will vary depending on the condition of the material being worked upon.
2. The vibration level indicated is the vector sum of the RMS (Root Mean Square) Values of amplitudes on each axis, standardized to an 8 hour
exposure period, and obtained using operating condition of the machine that generates the most repeatable but highest values in accordance
with the applicable standards for the machine.
Table 2. Engine Specifications/Dimensions
Model GX390U1QA2
Type
Bore X Stroke 3.2 in. X 2.5 in. (88 mm x 64 mm)
Displacement 389 cm
Max. Output 11.7 H.P. (8.7 kW) @ 3600 RPM
Continuous Rated Power
Max. Net Torque 26.5 Nm/2.70 kgfm/2,500 rpm
Ignition System Digital CDI with variable ignition timing
Fuel Tank Capacity 1.61 U.S. Gallons (Approx. 6.1 Liters)
Fuel Unleaded Gasoline
Lube Oil Capacity 1.06 qt. (1.1 liters)
Oil Type
Speed Control Method Centrifugal Flyweight Type
Cooling System Forced Air
Starting Method Recoil Start
Spark Plug Type BPR6ES NGK
Spark Plug Gap 0.028-0.031 in. (0.70 - 0.80 mm)
Dimension (L x W x H)
Dry Net Weight 69.9 lbs (31.7 Kg.)
Air cooled 4-stroke OHV petrol engine, 25° inclined
cylinder, horizontal shaft, cast iron sleeve
3
6.4 kW (8.6 HP)/3,000 rpm
7.0 kW (9.4 HP)/3,600 rpm
4-Stroke API, SF or SG
SAE 10W-30 General Use
16.0 x 18.1 X 17.6 in.
(406 X 460 X 448 mm)
TBD
TBD
EM120 HYD. PLASTER/MORTAR MIXER• OPERATION AND PARTS MANUAL — REV. #1 (09/09/19) — PAGE 13
APPLICATION
This mixer is only intended for the mixing of plaster and
mortar. 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 hydraulic mixer is 12.0 cu. ft.
(340 liters) with a batch capacity between 3-1/2 and 4-1/2
bags. Mixer is shipped completely assembled and has been
factory tested and is ready for use.
POWER PLANTS
Mixer is powered by a 11.7 HP, air-cooled, 4-stroke gasoline
engine. Refer to Table 2 for specific engine details.
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 4 as general guideline when the torqueing of mixer
hardware is required. Remember to keep all mixer hardware
components tight.
GENERAL INFORMATION
Table 4. Hardware Torque Recommendations
Hardware Diameter Torque (ft-lbs)
5/16-inch x 18 14
3/8-inch x 16 24
3/8-inch x 24 37
1/2-inch x 13 39
1/2-inch x 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 furnished with the engine.
PAGE 14 — EM120 HYD. PLASTER/MORTAR MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/09/19)
BASIC COMPONENTS (MIXER)
8. Safety Grill Lock Handle — To prevent injury to hands
6
7
5
8
3
2
4
11
9
10
and arms, the safety grill should ALWAYS be locked
when the mixing of plaster or mortar is required. Also
when transporting the mixer the safety grill should be
locked. The safety grill should only be un-locked when
cleaning of the blades and drum is required.
9. 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 twice a week.
1
Figure 2. Mixer Major Components
14
13
15
12
1. Tires Ply — The tire ply (layers) number is rated in
letters. This mixer uses 13-inch 2-ply tires. Replace
with only recommended type tires.
2. Engine Cover — Lift this cover to gain access to the
engine or electric motor.
3. ON/OFF Switch — This switch is located on the side
of the mixer frame. When activated it will shut down the
engine. Pull out when starting the engine.
4. Cabinet/Latch — Encloses engine and electric motor
(option). NEVER run mixer with cabinet removed. Use
latches to secure engine compartment cabinet.
5. Mixing Paddles — This mixer uses rubber mixing
paddles for the mixing of plaster and mortar. Always
clean paddles after each use
6. 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.
10. 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.
11. Mixing Drum — Steel mixing drum. Drum capacity is
12 cu. ft (340 liters). Mixing materials such as mortar,
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.
12. Tow Bar/Coupler — This mixer uses various towing
bars, please reference the frame assembly drawing
and parts list in this manual to determine which tow
bar meets your requirements.
13. Safety Chain — This mixer uses a 3/16-inch thick, 72
inches long zinc-plated saftey chain. ALWAYS connect
the safety chain when towing.
14. Cantilever (U-Type) Suspension — This mixer uses
a cantilever type suspension. Check the mounting
hardware for bolt hole elongation and tightness. See
maintenance section of this manual for recommended
maintenance.
15. Chock Blocks — Place these blocks (not included as
part of the mixer package) under each mixer wheel
to prevent rolling, when mixer is not connected to the
towing vehicle.
7. 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 mixer is in use. DO NOT remove the
grill or grill opening bar. Keep the grill clean by washing
it down daily.
EM120 HYD. PLASTER/MORTAR MIXER• OPERATION AND PARTS MANUAL — REV. #1 (09/09/19) — PAGE 15
BASIC COMPONENTS (HYDRAULIC)
2
1
3
4
11
6
10
Figure 3. Hydraulic Components
7
8
5
9
Figure 3 illustrates the hydraulic components used on the
mixer.
1. Hydraulic Motor — Bi-directional hydraulic motor that
is used in conjunction with the directional control valve
to operate the hydraulic dump cylinder and paddle
shaft.
2. Hydraulic Oil Cap — Remove this cap to add hydraulic
oil to the hydraulic oil tank. Fill with hydraulic oil as
listed in Table 1. Make sure cap is tightened securely.
3. Hydraulic Oil Tank — This tank has a capacity of 12
gallons (45 liters). Fill with only recommended hydraulic
oil type as listed in Table 1.
4. Hydraulic Valve — Directional hydraulic control valve.
Controls the direction of hydraulic fluid supplied to the
dump cylinder and paddle shaft.
5. Hydraulic Dump Cylinder — When activated, this
cylinder will cause the mixing drum to rotate to the
dump position.
6. Hydraulic Pump — Supplies hydraulic fluid to the
hydraulic control valve.
7. Hydraulic Dump Lever — Pull lever outward to place
mixing drum in the dump position. Push lever inward
to return mixing drum to the upright position.
8. Hydraulic Paddle Blade Lever — 3-position lever.
Push inward for clockwise rotation of blades, pull
outward for counterclockwise rotation of blades. Place
in center position for no blade rotation (neutral).
9. Hydraulic Oil Sight Gauge — This gauge indicates
the level and temperature of the hydraulic oil. For
normal operation oil level should be visible at the 3/4
point on the sightglass.
10. Strainer — Filters out large particles and debris that
are harmful to the hydraulic system.
11. Hydraulic Oil Filter — 10 micron hydraulic filter. Filters
out small particles that are harmful to the hydraulic
system.
PAGE 16 — EM120 HYD. PLASTER/MORTAR MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/09/19)
ENGINE COMPONENTS
1
11
10
2
3
9
8
7
6
5
Figure 4. Engine Components
4
INITIAL SERVICING
The engine (Figure 4) must be checked for proper
lubrication and filled with fuel prior to operation. Refer to the
manufacturer's engine manual for instructions and details
of operation and servicing.
1. Fuel Filler Cap/Fuel Tank – Remove this cap to add
unleaded gasoline to the fuel tank. Fill with unleaded
gasoline. Refer to Table 2 for fuel tank capacity. Make
sure cap is tightened securely. DO NOT over fill. For
additional information refer to Honda engine owner's
manual.
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.
2. Throttle Lever – Used to adjust engine RPM speed.
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 until resistance is felt, then pull
briskly and smoothly.
5. Oil Drain Plug – Remove this plug to remove oil from
the engine's crankcase.
6. Fuel Valve Lever – OPEN to let fuel flow, CLOSE to
stop the flow of fuel.
7. Dipstick/Oil Filler Cap – Remove this cap to determine
if the engine oil is low. Add oil through this filler port as
recommended in Table 5.
8. Choke Lever – Used in the starting of a cold engine,
or in cold weather conditions. The choke enriches the
fuel mixture.
9. Air Cleaner – Prevents dirt and other debris from
entering the fuel system. Remove wing-nut on top of
air filter canister to gain access to filter element.
NOTICE
Operating the engine without an air filter, with a
damaged air filter, or a filter in need of replacement
will allow dirt to enter the engine, causing rapid engine
wear.
10. Spark Plug – Provides spark to the ignition system.
Set spark plug gap according to engine manufacturer's
instructions. Clean spark plug once a week.
11. Muffler – Used to reduce noise and emissions. NEVER
touch when hot!
EM120 HYD. PLASTER/MORTAR MIXER• OPERATION AND PARTS MANUAL — REV. #1 (09/09/19) — PAGE 17
TOWING GUIDELINES
TOWING SAFETY PRECAUTIONS
CAUTION
Check with your county or state safety towing
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 list of suggestions 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.
ALWAYS make sure that the fuel valve lever is in the
OFF position (gasoline models only).
Check wheel mounting lug nuts with a torque wrench.
Torque wheel lug nuts as described in the maintenance
section of this manual.
Check tightness of U-clamp nuts, torque suspension
hardware as referenced in the maintenance section of
this manual.
Avoid sudden stops and starts. This can cause skidding,
or jackknifing. Smooth, gradual starts and stops will
improve gas milage.
Avoid sharp turns to prevent rolling.
CAUTION
If the mixer tow bar is deformed or damaged replace
entire tow bar. NEVER tow the mixer with a defective
tow bar. There exist the possibility of the trailer
separating from the towing vehicle.
CHECK the tire air pressure on both the towing vehicle
and the trailer. Also check the tire tread wear on both
vehicles.
ALWAYS make sure the mixer is equipped with a "Safety
Chain."
ALWAYS attach trailer's safety chain to the frame of
towing vehicle.
ALWAYS make sure that the towing vehicle's directional,
backup, and brake lights are working properly.
Remember in most cases the maximum speed unless
otherwise posted for highway towing is 55 MPH, however
before towing your mixer, check your local state, and
county vehicle towing requirements. Recommended offroad towing is not to exceed 15 MPH or less depending
on type of terrain.
Place chocked blocks underneath wheels to prevent
rolling
vehicle.
Inflate tires to correct pressure, inspect tires for cuts, and
excessive wear. See Table 7 (Tire Wear Troubleshooting).
When towing of the mixer is required, place the drum in
the up position (mouth facing upwards).
, while parked, if disconnected from towing
TOW BAR TO VEHICLE (COUPLER ONLY)
1. Check the vehicle hitch ball, and 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 (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 separation of the coupler and ball
or ball failure.
3. After tow bar has been connected to mixer (see next
page), attach mixer's coupler to the hitch ball on the
towing vehicle securely and make sure the lock lever
is in the down position (locked).
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.
2. After tow bar has been connected to mixer (see next
page), 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 nylock nut grade
5 when securing either tow bar to the towing vehicle.
PAGE 18 — EM120 HYD. PLASTER/MORTAR MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/09/19)
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