OperatiOn Manual
SERIES
MODEL PRO12
HYDRAULIC PLASTER/MORTAR MIXER
(HONDA GX390RT2-QNB2 GASOLINE ENGINE)
Revision #0 (05/06/13)
To find the latest revision of this
publication, visit our website at:
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
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SILICOSIS/RESPIRATORY wARNINGS
WARNING 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.
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.
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TABLE Of CONTENTS
PRO12 Hydraulic Mixer
Proposition 65 Warning ........................................... 2
Silicosis/Respiratory Warnings................................ 3
Table Of Contents.................................................... 4
Safety Information ................................................ 5-8
Specifications .......................................................... 9
Dimensions............................................................ 10
General Information............................................... 11
Mixer Components ........................................... 12-13
Hydraulic Components ..................................... 14-15
Basic Engine.......................................................... 16
Paddle Blade Adjustment ...................................... 17
Inspection ......................................................... 18-19
Startup.............................................................. 20-21
Operation............................................................... 22
Maintenance..................................................... 23-25
Troubleshooting ................................................ 26-28
Hydraulic System Locator...................................... 30
Hydraulic System Diagram.................................... 31
NOTICE
Specifications and part numbers are subject to change
without notice.
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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.
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.
Symbol
Safety Hazard
saFety messages
Lethal exhaust gas hazards
The four safety messages shown below will inform you
about potential hazards that could injure you or others.The
safety messages specifically address the level of exposure
to the operator and are preceded by one of four words:
danger,warning, caution or notice.
Explosive fuel hazards
Burn hazards
saFety symBols
danger
Indicates a hazardous situation which, if not avoided,
will result in death or serious inJury.
warning
Indicates a hazardous situation which, if not avoided,
COuLD result in death or serious inJury.
Rotating parts hazards
caution
Indicates a hazardous situation which, if not avoided,
COuLD result in minor or moderate inJury.
NOTICE
Addresses practices not related to personal injury.
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SAfETY INfORMATION
general saFety
caution
NOTICE
This equipment should only be operated by trained and
qualified personnel 18 years of age and older.
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.
Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.
Manufacturer does not assume responsibility for any
accident due to equipment modifications. Unauthorized
equipment modification will void all warranties.
never use accessories or attachments that are not
recommended by Multiquip for this equipment. Damage
to the equipment and/or injury to user may result.
Avoid wearing jewelry or loose fitting clothes that may
snag on the controls or moving parts as this can cause
serious injury.
always know the location of the nearest
never operate this equipment when not
feeling well due to fatigue, illness or when
under medication.
fire extinguisher.
always know the location of the nearest
first aid kit.
never operate this equipment under the
influence of drugs or alcohol.
alwaysknow the location of the nearest phone or keep
a phone on the job site. Also, know the phone numbers
of the nearest ambulance,doctor and fire department.
This information will be invaluable in the case of an
emergency.
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.
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SAfETY INfORMATION
engine saFety
mixer saFety
danger
danger
Engine fuel exhaust gases contain poisonous carbon
monoxide. This gas is colorless and odorless, and can
cause death if inhaled.
neveroperate the equipment in an explosive
atmosphere or near combustible materials.An
explosion or fire could result causing severe
bodily harm or even death.
The engine of this equipment requires an adequate
free flow of cooling air. never operate this equipment
in any enclosed or narrow
do not mix flammable or explosive substances.
warning
area where free flow of the
air is restricted. If the air
flow is restricted it will cause
injury to people and property
and serious damage to the
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.
equipment or engine.
warning
do not place hands or fingers inside engine
compartment when engine is running.
Before operating mixer, ensure that safety grate is in
position and correctly fitted.
never operate the engine with heat shields or
guards removed.
caution
Keep fingers, hands hair and clothing away
from all moving parts to prevent injury.
never lubricate components or attempt service on a
running machine.
do not remove the engine oil drain plug
while the engine is hot. Hot oil will gush out of the oil
tank and severely scald any persons in the general area
of the mixer.
NOTICE
always keep the machine in proper running condition.
always ensure mixer is on level ground before mixing.
caution
Fix damage to machine and replace any broken parts
immediately.
never touch the hot exhaust manifold,
muffler or cylinder.Allow these parts to cool
before servicing equipment.
do not tip mixer onto drum mouth when the drum is
rotating.
Make certain the operator knows how to and is capable
of turning the engine OFF in case of an emergency.
Ensure the drum is rotating while filling and emptying
the drum.
NOTICE
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.
never run engine without an air filter or with a dirty air
filter.Severe engine damage may occur.Service air filter
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.
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SAfETY INfORMATION
Fuel saFety
danger
transporting saFety
caution
do not add fuel to equipment if it is placed inside truck
bed with plastic liner. Possibility exists of explosion or
fire due to static electricity.
never allow any person or animal to stand underneath
the equipment while lifting.
NOTICE
FUEL
alwaysmake 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.
FUEL
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 difficult.
do notstart the engine near spilled fuel or combustible
fluids. Fuel is extremely flammable and its vapors can
cause an explosion if ignited.
environmental saFety
always refuel in a well-ventilated area, away from
sparks and open flames.
NOTICE
Dispose of hazardous waste properly.
Examples of potentially hazardous waste
are used motor oil, fuel and fuel filters.
always use extreme caution when working with
flammable liquids.
do not fill the fuel tank while the engine is running
or hot.
do not use food or plastic containers to dispose of
hazardous waste.
do not overfill tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or sparks from
the ignition system.
do not pour waste, oil or fuel directly onto the ground,
down a drain or into any water source.
Store fuel in appropriate containers, in well-ventilated
areas and away from sparks and flames.
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.
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SPECIfICATIONS
table 1. Mixer Specifications
12.0 cu. ft (340 liters)
Capacity
Bag Capacity
3 to 4 bags
1580 lbs. (716.68 kg.)
1 in. (25.4 mm)
Operating Weight
Maximum Aggregate Size
Adjustable Drum Discharge Height
Drive System
Up to 42.5 in. (1079.5 mm.)
Hydraulic
Dump Action
Hydraulic
table 2. Engine Specifications
honda gx390rt2-QnB2
Air-cooled 4 stroke, Horizontal Shaft, Gasoline Engine
Model
Type
3.46 in. X 2.51 in.
(88 mm x 64 mm)
Bore X Stroke
Displacement
23.7 cu. in. (389 cc)
11.7 H.P./3600 R.P.M.
9.0H.P./3600 R.P.M.
Max Output
Continuous Output
Fuel Tank Capacity
Fuel
Approx. 1.7 U.S. Gallons (6.5 Liters)
Unleaded Gasoline
Lube Oil Capacity
Speed Control Method
Starting Method
1.16 qt. (1.1 liter)
Centrifugal Fly-weight Type
Electric Start
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DIMENSIONS
C
A
B
Figure 1. Mixer Dimensions
table 3. Mixer Dimensions
Reference Designator
dimension in. (mm.)
73.5 (1917.7)
35.0 (889)
A (Length)
B (Width)
C (Height)
45.0 (1143)
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GENERAL INfORMATION
application
hardware
The Multiquip PRO12 hydraulic mixer (with drum capacity
of 12.0 cu. ft./340 liters) is shipped completely assembled,
factory-tested, and ready for use.
Check all hardware on the mixer before starting.Periodically
inspect all hardware. Loose hardware can contribute to
early component failure and poor performance. Keep all
mixer hardware components tight.
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 mixing flammable or explosive
substances. The mixer must not be used in an explosive
atmosphere.This mixer has a batch capacity between 3-1/2
and 4-1/2 bags.
engine maintenance
For basic engine maintenance, refer to the engine
maintenance section in this manual. For a more detailed
engine maintenance, refer to the Honda Engine Owner's
manual furnished with the engine.
power plants
This hydraulic mixer is powered by a 11.7 HP Honda
GX390RT2-QNB2 air-cooled, 4-stroke, gasoline engine.
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MIXER COMPONENTS
3
6
1
2
5
8
4
13
12
9
11
14
10
Figure 2. Mixer Components
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MIXER COMPONENTS
1. Engine Cover — Lift this cover to gain access to the
engine or electric motor.
8. 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.
2. start/stop switch — This switch is located on the
side of the engine cover. When activated it will shut
down the engine.
9. Mixing Drum — Drum capacity is 12 cu.ft (340 liters).
Mixing materials such as mortar and plaster are to be
placed into this drum for mixing. Always clean drum
after each use.
3. Latch — Use this latch to secure the engine
compartment enclosure.
4. 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.
10. swivel Jack stands — These jack stands swivel out
to support the mixer.
11. Forklift Pockets — When lifting of the mixer is
required, use these fork lift pockets to lift the mixer.
Remember to insert the forks of the forklift a minimum
of 24 inches into the lift pockets.
5. Mixing Paddles —This mixer uses plastic and rubber
mixing paddles for the mixing of plaster and mortar.
Always clean paddles after each use.
12. adjustable stabilizer Jackstands — Use these jack
stands to adjust the mixer to the desired height.
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.
13. Hydraulic Oil Filter — 10 micron hydraulic filter.Filters
out small particles that are harmful to the hydraulic
system.
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.
14. Charcoal Canister — A container filled with activated
charcoal that traps gasoline vapors emitted by the fuel
system.A container filled with activated charcoal that
traps gasoline vapors emitted by the fuel system.
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HYDRAULIC COMPONENTS
6
5
8
1
3
7
2
4
2
Figure 3. Hydraulic Components
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HYDRAULIC COMPONENTS
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.
5. Hydraulic Dump Lever — This lever is only provided
on mixers with hydraulic dump capability. Pull lever
outward to activate dump cylinder.
6. hydraulic paddle Blade lever — 3-position lever.
Push inward for clockwise mixing rotation of blades.
Place in center position for no rotation (neutral/off).
2. Hydraulic Dump Cylinder — When activated, this
cylinder will cause the mixing drum to rotate to the
dump position.This cylinder is provided on mixers with
hydraulic dump capability.
7. Pump — Supplies hydraulic fluid to the hydraulic
control valve.
3. 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
midpoint on the sightglass.
8. Hydraulic Oil Filter — 10 micron hydraulic filter.Filters
out small particles that are harmful to the hydraulic
system.
4. hydraulicvalve — Directional hydraulic control valve.
Controls the direction of hydraulic fluid supplied to the
dump cylinder and paddle shaft.
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BASIC ENGINE
2. throttle lever — Used to adjust engine RPM speed
(lever advanced forward slow, lever back toward
operator Fast).
1
10
9
3. engine on/oFFswitch — onposition permits engine
starting, OFF position stops engine operations.
2
4. recoil starter (pull rope)— Manual-starting method.
Pull the starter grip until resistance is felt, then pull
briskly and smoothly.
3
8
5. Fuel valve lever — open to let fuel flow, CLOSE to
stop the flow of fuel.
7
6. Choke Lever — Used in the starting of a cold engine,
or in cold weather conditions. The choke enriches the
fuel mixture.
6
5
7. Air Cleaner — Prevents dirt and other debris from
entering the fuel system. Remove wing-nut on top of
air filter cannister to gain access to filter element.
4
Figure 4. Engine Components
NOTICE
initial servicing
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.
The engine (Figure 4) must be checked for proper
lubrication and filled with fuel prior to operation.Refer to the
engine manufacturer’s manual for instructions and details
of operation and servicing.
warning
1. Fuel Filler Cap — Remove this cap to add unleaded
gasoline to the fuel tank. Make sure cap is tightened
securely. do not over fill.
Engine components can generate extreme
heat. To prevent burns, do not touch
these areas while the engine is running or
immediately after operating.neveroperate
the engine with the muffler removed.
danger
Adding fuel to the tank should be done
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.
8. Spark Plug — Provides spark to the ignition system.
Set spark plug gap to 0.6 - 0.7 mm (0.028 - 0.031 inch)
Clean spark plug once a week.
9. Muffler — Used to reduce noise and emissions.
10. Fueltank — Holds unleaded gasoline. For additional
information refer to engine owner's manual.
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PADDLE BLADE ADjUSTMENT
STEEL DRUM
CAST PADDLE
CENTER TOW END
CAST PADDLE
DRUM END
ENGINE END
CAST PADDLE
PADDLE BLADE IS TOO
TIGHT AGAINST DRUM
SIDE WALLS.
DRUM SIDE
CENTER ENGINE
END CAST PADDLE
INCORRECT
INCORRECT
CORRECT
INCORRECT
CORRECT
SIDE PADDLE BLADE
PADDLE BLADE IS TOO
TIGHT AGAINST DRUM
SIDE WALLS.
ROTATION
DRUM END AND SIDE WALLS
Figure 5. Paddle Blade Adjustment
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INSPECTION
BeFore starting
table 4. oiltype
Season
Summer
Spring/Fall
Winter
temperature
25°C or Higher
25°C~10°C
oiltype
SAE 10W-30
SAE 10W-30/20
SAE 10W-10
1. Read safety instructions at the
beginning of manual.
2. Clean the mixer, removing dirt and
dust, particularly the engine cooling
air inlet, carburetor and air cleaner.
0°C or Lower
3. Check the air filter for dirt and dust. If air filter is dirty,
replace air filter with a new one as required.
danger
Motor fuels are highly flammable and can
be dangerous if mishandled. do not
smoke while refueling. do not attempt
to refuel the pump if the engine is hot!
or running.
4. Check carburetor for external dirt and dust. Clean with
dry compressed air.
5. Check fastening nuts and bolts for tightness.
engine oil check
Fuel check
1. To check the engine oil level, place the mixer on secure
level ground with the engine stopped.
1. Remove the gasoline cap located on top of fuel tank.
2. Remove the filler dipstick from the engine oil filler hole
(Figure 6) and wipe clean.
2. Visually inspect to see if the fuel level is low. If fuel is
low, replenish with unleaded fuel.
3. When refueling, be sure to use a strainer for filtration.
do not top-off fuel. Wipe up any spilled fuel
immediately!
start/stop switch check
This switch should be tested every time the engine is
started.
Figure 6. Engine Oil Dipstick (Removal)
caution
3. Insert and remove the dipstick without screwing it into
the filler neck.Check the oil level shown on the dipstick.
never disable or disconnect the start/stop switch. It
is provided for operator safety. Injury may result if it is
disabled, disconnected or improperly maintained.
4. If the oil level is low (See Figure 7), fill to the edge of
the oil filler hole with the recommended oil type
(Table 4). Maximum oil capacity is 1.16 quarts
(1.1 liters).
HyDRAuLiC OiL
Check hydraulic oil sight gauge (Figure 8) to ensure that
hydraulic oil is at the midway level.
Figure 7. Engine Oil Dipstick (Oil Level)
Figure 8. Hydraulic Oil Sight Gauge
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INSPECTION
grease Fitting (dump cylinder)
HyDRAuLiC HOSES
Check the zerk grease fittings on the dump cylinder
(Figure 10). This grease fitting lubricates the hydraulic
dumping mechanism.
Check hydraulic hoses (Figure 3) to make sure they are
not worn, frayed or defective.
grease Fittings (Bearings)
Check the zerk grease fittings (Figure 9) at each end of
the mixing drum.These grease fittings lubricate the paddle
shaft bearings.
GREASE FITTING
GREASE FITTING CAP
DUMP CYLINDER
BEARING
GREASE
FITTING
Figure 9. Grease Fittings (Bearings)
GREASE FITTING CAP
GREASE FITTING
Figure 10. Grease Fittings (Dump Cylinder)
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STARTUP
caution
do not attempt to operate the mixer
until the Safety, General Information and
Inspection sections of this manual have
been read and thoroughly understood.
This section is intended to assist the operator with the
initial start-up of the mixer. It is extremely important that
this section be read carefully before attempting to use the
mixer in the field.
Figure 13. Engine Choke Lever (Closed)
4. Place the choke lever (Figure 14) in the “open”
position if starting a warm engine or the temperature
is warm.
startingthe engine (honda engine)
1. Place the engine fuel valve lever (Figure 11) to the
“on” position.
Figure 14. Engine Choke Lever (Open)
5. Place the engine ON/OFF switch (Figure 15) in the
“on” pos
Figure 11. Engine Fuel Valve Lever (ON
Position)
2. Move the throttle lever (Figure 12) away from the
slow position, about 1/3 of the way toward the fast
position.
Figure 15. Engine ON/OFF Switch (ON Position)
6. Pull the Start/Stop Switch, located on the engine cover,
outward to start the engine (Figure 16).
START/STOP
SWITCH
PULL OUT
TO START
Figure 12. Throttle Lever (1/3 Start Position)
3. Place the choke lever (Figure 13) in the “CLOSED”
position if starting a cold engine.
Figure 16. Start/Stop Switch (Start Position)
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STARTUP
7. Turn the engine ignition key (Figure 17) to the start
position and hold it until the engine starts.When engine
starts, release the key, allowing it to return to the on
position.
stoppingthe engine
normal shutdown
1. Move the throttle lever to the IDLE position (Figure 20)
and run the engine for three minutes at low speed.
Figure 17. Engine Ignition Key
8. If the choke lever was moved to the "CLOSED" position
to start the engine gradually move it to the "open"
position (Figure 18) as the engine warms up. If the
engine has not started repeat steps 1 through 6.
Figure 20. Throttle Lever (Idle)
2. After the engine cools, push the Start/Stop switch
on the engine cover inward to the “OFF” position
(Figure 21).
START/STOP
SWITCH
PUSH IN
TO STOP
Figure 18. Choke Lever (Open)
Figure 21. Start/Stop Switch (OFF Position)
9. Before the mixer is placed in to operation, run the
engine for several minutes. Check for fuel leaks, and
noises that would associate with a lose component.
3. Place the fuel shut-off lever (Figure 22) in the "OFF"
position.
10. To begin mixing, place the throttle lever (Figure 19) in
the “run” position.
Figure 22. Fuel Valve Lever (OFF)
emergency shutdown
1. Move the throttle lever quickly to the iDLE position, and
place the engine ON/OFF switch in the OFF position.
Figure 19. Throttle Lever (Run)
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OPERATION
mixing
1. On the hydraulic valve, push lever inward (Figure 23)
for clockwise mixing rotation of blades.
NEUTRAL
PUSH IN
TO MIX
PULL OUT
TO REVERSE
Figure 23. Hydraulic Paddle Lever
Figure 25. Hydraulic Dump
2. The paddle shaft inside the drum should be rotating
at this time.
2. Pull hydraulic dump lever inward to place drum back
in upright position.
3. Add a small amount water to the mixing drum.
warning
4. Lift the mixing bag compound onto the steel safety
grate over the bag cutter and let the contents fall into
the drum.Add more water if desired and mix compound
to desired consistency.
When rotating the mixing drum from the dump position
to the upright position, keep hands clear of safety grate.
The possibility exists of hands or fingers being crushed.
dumping
1. Push hydraulic dump lever (Figure 24) outward to place
drum in dump position (Figure 25).
PUSH
TO DUMP
PULL
TO RETURN
Figure 24. Hydraulic Dump Lever
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MAINTENANCE
Perform engine maintenance procedures as scheduled in Table 5.
table 5. Engine Maintenance Schedule
First every 3
Before Month or Months or Months or year or
every 6
Every
Every 2
years or
200 hrs
description (3)
Operation
10 hrs
25 hrs
50 hrs
100 hrs
CHECK
CHANGE
CHECK
X
X
Engine Oil
Air Cleaner
X
CHANGE
X (1)
All Nuts and
Bolts
Re-tighten If
Necessary
X
CHECK-CLEAN
REPLACE
CHECK
X
X
Spark Plug
X
Cooling Fins
Spark Arrester
Fuel Tank
CLEAN
X
X
CLEAN
Fuel Filter
CHECK
X
Idle Speed
CHECK-ADJUST
X (2)
Valve Clearance CHECK-ADJUST
Fuel lines CHECK
X (2)
Every 2 years (replace if necessary) (2)
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.
NOTICE
Refer to engine manufacturer's manual for specific
servicing instructions.
pro12 hydraulic mixer • operation manual — rev. #0 (05/06/13) — page 23
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MAINTENANCE
Perform the engine maintenance indicated below:
4. Replace engine oil with recommended type oil as listed
inTable 4.Engine oil capacity is 1.16 quarts (1.1 liters).
do not over fill.
Daily
1. 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.
danger
do not use gasoline as a cleaning
solvent, because that would create a risk
of fire or explosion.
weekly
1. Remove the fuel filter cap and clean the inside of the
fuel tank.
engine air cleaner
2. Remove or clean the filter at the bottom of the tank.
1. Remove the air cleaner cover and foam filter element
as shown in Figure 28.
3. Remove and clean the spark plug (Figure 26), then
adjust the spark gap to 0.028~0.031 inch
(0.6~0.7 mm). This unit has electronic ignition, which
requires no adjustments.
2. Tap the paper filter element (Figure 28) several
times on a hard surface to remove dirt, 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 foam element in warm, soapy water or
non-flammable solvent. Rinse and dry thoroughly. Dip
the element in clean engine oil and completely squeeze
out the excess oil from the element before installing.
Figure 26. Spark Plug Gap
engine oil
1. Drain the engine oil when the oil is warm as shown
in Figure 27.
Figure 27. Engine Oil (Draining)
2. Remove the oil drain bolt and sealing washer and allow
the oil to drain into a suitable container.
Figure 28. Engine Air Cleaner
3. Install drain bolt with sealing washer and tighten
securely.
page 24 — pro12 hydraulic mixer • operation manual — rev. #0 (05/06/13)
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MAINTENANCE
9. neverpour or spray water over the engine (Figure 30).
hydraulic oil Filter
Replace hydraulic oil filter (Figure 29) every 500 hours.
Hydraulic tank capacity is 12 gallons (45 liters). Refill with
any of the following hydraulic oil types. Shell Tellius 68,
Mobil DFE26 or Texaco Rand HDC.
Figure 30. No Spraying of Water
10. When cleaning of the entire mixer is done, return mixing
drum to an upright position.
mixer storage
For storage of the mixer for over 30 days, the following is
recommended:
Figure 29. Hydraulic Oil Filter
1. Drain the fuel tank completely, or add STA-BIL to the
fuel.
mixer cleaning
It is important that the drum interior is free of dried material.
Obstructions can cause the paddle blades to lock against
the drum resulting in sudden dump handle movement.
2. Run the engine until the fuel is completely consumed.
3. Completely drain used oil from the engine crankcase
and fill with fresh clean oil, then follow the procedures
described in the engine manual for engine storage.
1. Stop the engine. Push the Start/Stop switch on the
engine cover inward to the “OFF” position.
4. Clean the entire mixer and engine compartment.
2. Place the hydraulic paddle lever in "neutral" position
to disengage.
5. Place the mixing drum in the down position (mouth
facing downward).
3. always disconnect the spark plug wire before
cleaning the inside of the drum.
6. Cover the mixer and place it a clean dry area, that is
protected from harsh elements.
4. Place "Do Not Operate" tag on mixer.
5. Make sure the rear section of safety grate is connected
to the mixing drum.
6. At the end of each day’s operation, place mixer drum in
an upright position and spray inside of tub immediately
with water to prevent lumps of dried mortar or plaster
from forming and contamination of future batches. DO
not allow a buildup of materials to form on the blades
or anywhere inside the drum.
7. Rotate mixer to dump position and remove debris.
8. Thoroughly clean the entire mixer, cabinet, and frame.
pro12 hydraulic mixer • operation manual — rev. #0 (05/06/13) — page 25
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TROUBLESHOOTING
Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a
breakdown, please take remedial action following the diagnosis based on the troubleshooting tables. If the problem cannot
be remedied, please leave the unit as is and consult our company's service department.
troubleshooting (engine)
Symptom
Possible Problem
Spark plug bridging?
Solution
Check gap, insulation or replace spark plug.
Clean or replace spark plug.
Carbon deposit on spark plug?
Short circuit due to deficient spark plug
insulation?
Check spark plug insulation, replace if worn.
Improper spark plug gap?
Fuel reaching carburetor?
Water in fuel tank?
Set to proper gap.
Check fuel line.
Flush or replace fuel tank.
Replace fuel filter.
Fuel filter clogged?
Stuck carburetor?
Check float mechanism.
Check transistor ignition unit.
Difficult to start, fuel is available, but no spark at
spark plug.
Spark plug is red?
If insufficient compression, repair or replace
engine. If injected air leaking, correct leak. If
carburetor jets clogged, clean carburetor.
Spark plug is bluish white?
Check transistor ignition unit is broken, and
replace defective unit. Check if voltage cord
cracked or broken and replace. Check if spark
plug if fouled and replace.
No spark present at tip of spark plug?
No oil?
Add oil as required.
Oil pressure alarm lamp blinks upon starting? (if Check automatic shutdown circuit, "oil sensor".
applicable)
(if applicable)
ON/OFF switch is shorted?
Check switch wiring, replace switch.
Replace ignition coil.
Ignition coil defective?
Difficult to start, fuel is available, and spark is
present at the spark plug.
Improper spark gap, points dirty?
Condenser insulation worn or short circuiting?
Spark plug wire broken or short circuiting?
Set correct spark gap and clean points.
Replace condenser.
Replace defective spark plug wiring.
Flush fuel system, replace with correct type of
fuel.
Wrong fuel type?
Difficult to start, fuel is available, spark is
present and compression is normal.
Water or dust in fuel system?
Air cleaner dirty?
Flush fuel system.
Clean or replace air cleaner.
Close choke.
Choke open?
Suction/exhaust valve stuck or protruded?
Piston ring and/or cylinder worn?
Reseat valves.
Replace piston rings and/or piston.
Difficult to start, fuel is available, spark is
present and compression is low.
Cylinder head and/or spark plug not tightened
properly?
Torque cylinder head bolts and spark plug.
Head gasket and/or spark plug gasket damaged?
No fuel in fuel tank?
Replace head and spark plug gaskets.
Fill with correct type of fuel.
Apply lubricant to loosen fuel cock lever,
replace if necessary.
Fuel cock does not open properly?
No fuel present at carburetor.
Fuel filter/lines clogged?
Fuel tank cap breather hole clogged?
Air in fuel line?
Replace fuel filter.
Clean or replace fuel tank cap.
Bleed fuel line.
page 26 — pro12 hydraulic mixer • operation manual — rev. #0 (05/06/13)
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TROUBLESHOOTING
troubleshooting (engine) - continued
Symptom
Possible Problem
Solution
Clean or replace air cleaner.
Check float adjustment, rebuild carburetor.
Clean or replace spark plug.
Set to proper gap.
Air cleaner dirty?
Improper level in carburetor?
Defective spark plug?
Weak in power, compression is proper and
does not misfire.
Improper spark plug?
Flush fuel system and replace with correct
type of fuel.
Water in fuel system?
Weak in power, compression is proper but
misfires.
Dirty spark plug?
Clean or replace spark plug.
Replace ignition coil.
Ignition coil defective?
Spark plug heat value incorrect?
Wrong type of fuel?
Replace with correct type of spark plug.
Replace with correct type of fuel.
Clean cooling fins.
Cooling fins dirty?
Engine overheats.
Clear intake of dirt and debris. Replace air
cleaner elements as necessary.
Intake air restricted?
Oil level too low or too high?
Governor adjusted incorrectly?
Governor spring defective?
Fuel flow restricted?
Adjust oil to proper level.
Adjust governor.
Rotational speed fluctuates.
Replace governor spring.
Check entire fuel system for leaks or clogs.
Recoil mechanism clogged with dust and dirt? Clean recoil assembly with soap and water.
Recoil starter malfunctions. (if applicable)
Spiral spring loose?
Replace spiral spring.
Ensure tight, clean connections on battery
and starter.
Loose, damaged wiring?
Starter malfunctions.
Battery insufficiently charged?
Recharge or replace battery.
Replace starter.
Starter damaged or internally shorted?
Check and clean valves. Check muffler and
replace if necessary.
Over-accumulation of exhaust products?
Wrong spark plug?
Burns too much fuel.
Replace spark plug with manufacturer's
suggested type.
Lubricating oil is wrong viscosity?
Worn rings?
Replace lubricating oil with correct viscosity.
Replace rings.
Exhaust color is continuously "white".
Air cleaner clogged?
Clean or replace air cleaner.
Adjust choke valve to correct position.
Choke valve set to incorrect position?
Carburetor defective, seal on carburetor
broken?
Exhaust color is continuously "black".
Replace carburetor or seal.
Poor carburetor adjustment, engine runs too
rich?
Adjust carburetor.
ON/OFF device not activated ON?
Battery disconnected or discharged?
Ignition switch/wiring defective?
Turn on ON/OFF device.
Check cable connections. Charge or replace
battery
Will not start, no power with key "ON". (if
applicable)
Replace ignition switch. Check wiring.
pro12 hydraulic mixer • operation manual — rev. #0 (05/06/13) — page 27
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TROUBLESHOOTING
troubleshooting (mixer)
Possible Problem
Symptom
Solution
Worn or defective V-belt?
Replace V-belt.
Check position of adjustment lever.
Adjust if necessary.
Adjustment lever mis-aligned?
Material load too heavy, exceeding
mixer capability?
Reduce amount of material being
mixed.
Blades will not rotate.
Object stuck inside mixing drum,
jamming paddle rotation?
Stop engine. Empty out drum
contents. Remove obstruction.
Improper engine speed?
Check and adjust engine speed.
Material leaking from drum ends.
Drum difficult to discharge (tilt).
Worn or defective paddle shaft seals? Replace seals.
Defective or worn drum support
brackets?
Apply grease to bracket or replace.
Adjust blades until they almost touch
side walls of drum.
Blades adjusted too tight.
page 28 — pro12 hydraulic mixer • operation manual — rev. #0 (05/06/13)
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NOTES
pro12 hydraulic mixer • operation manual — rev. #0 (05/06/13) — page 29
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HYDRAULIC SYSTEM LOCATOR
4
5
12
1
13
2
3
8
9
6
7
11
10
page 30 — pro12 hydraulic mixer • operation manual — rev. #0 (05/06/13)
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HYDRAULIC SYSTEM DIAGRAM
HYDRAULIC SYSTEM DIAGRAM
HYDRAULIC
DUMP
FORWARD/REVERSE
8
9
12
GEAR
PUMP
ENGINE
RELIEF
VALVE
10
5
1750 PSI
RETURN
FILTER
SUCTION
STRAINER
2
BYPASS
25 PSI
2
1
13
3
HYD
MOTOR
TANK
TANK
4
RELIEF
VALVE
CYLINDER
11
1
1
1750 PSI
6
7
CYLINDER
pro12 hydraulic mixer • operation manual — rev. #0 (05/06/13) — page 31
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OperatiOn Manual
HERE’S HOW TO GET HELP
PLEASE HAVE THE MODEL AND SERIAL
NUMBER ON-HAND WHEN CALLING
United StateS
Multiquip Corporate Office
MQ Parts Department
18910 Wilmington Ave.
Carson, CA 90746
Contact: [email protected]
Tel. (800) 421-1244
Fax (310) 537-3927
800-427-1244
310-537-3700
Fax: 800-672-7877
Fax: 310-637-3284
Service Department
Warranty Department
800-421-1244
310-537-3700
Fax: 310-537-4259
Fax: 310-943-2238
800-421-1244
310-537-3700
Fax: 310-943-2249
Technical Assistance
800-478-1244
mexico
United Kingdom
MQ Cipsa
Multiquip (UK) Limited Head Office
Carr. Fed. Mexico-Puebla KM 126.5
Momoxpan, Cholula, Puebla 72760 Mexico
Contact: [email protected]
Tel: (52) 222-225-9900
Unit 2, Northpoint Industrial Estate, Tel: 0161 339 2223
Fax: (52) 222-285-0420 Globe Lane,
Dukinfield, Cheshire SK16 4UJ
Contact: [email protected]
Fax: 0161 339 3226
Canada
Multiquip
4110 Industriel Boul.
Laval, Quebec, Canada H7L 6V3
Contact: [email protected]
Tel: (450) 625-2244
Tel: (877) 963-4411
Fax: (450) 625-8664
© COPYRIGHT 2013, 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 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.
The information and specifications 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 specifications, design or the information published
in this publication at any time without notice and without incurring any obligations.
Your Local Dealer is:
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