MBW MM120 User manual

OPERATOR’SSAFETY
AND SERVICE MANUAL
L17590 / 06.11.G
©MBW, Inc. 2005
Printed in the USA
MM120
This manual covers the following serial numbers
and higher for each model listed:
MM120 . . . . . . . . . . . . . . . . . . . 7070040
MORTAR & PLASTER MIXERS
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TABLE OFCONTENTS
Safety Information . . . . . . . . . . . . . . . . . . . . . . 1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Decals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . 5
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Before Starting & Operating . . . . . . . . . . . . . . . . . . . . 6
Starting Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Stopping Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . 8
Fluid Levels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Engine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Engine Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Checking Gearbox Oil. . . . . . . . . . . . . . . . . . . . . . . . . 9
Changing Gearbox Oil . . . . . . . . . . . . . . . . . . . . . . . . 9
Adjusting Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Greasing Wheel Bearings . . . . . . . . . . . . . . . . . . . . 10
Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Torque Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Engine Shroud Removal . . . . . . . . . . . . . . . . . . . . . 11
Engine Shroud Installation . . . . . . . . . . . . . . . . . . . . 11
Drum Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Drum Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Drum Bearing & Seals Replacement . . . . . . . . . . . . 12
Engine & Gearbox Removal. . . . . . . . . . . . . . . . . . . 12
Engine & Gearbox Installation . . . . . . . . . . . . . . . . . 12
Engine & Gearbox Disassembly. . . . . . . . . . . . . . . . 13
Engine & Gearbox Assembly . . . . . . . . . . . . . . . . . . 13
Gearbox Disassembly . . . . . . . . . . . . . . . . . . . . . . . 13
Gearbox Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Parts Replacement Cycles and Tolerances . . . . . . . 14
Replacement Parts . . . . . . . . . . . . . . . . . . . . . 15
Drum Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Gearbox Drive Assembly . . . . . . . . . . . . . . . . . . . . . 18
Gearbox Drivetrain Assembly. . . . . . . . . . . . . . . . . . 20
Gearbox Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Frame & Axle Assembly . . . . . . . . . . . . . . . . . . . . . . 24
Paddle Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
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CALIFORNIA PROPOSITION 65 WARNING
Engine exhaust and some of its constituents are
known in the state of California to cause cancer,
birth defects, and other reproductive harm.
WARNING
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- 1 -
SAFETY INFORMATION
Introduction
This Safety Alert Symbol is used to call attention
to items or operations which may be dangerous
to those operating or working with this
equipment. The symbol can be found
throughout this manual and on the unit. Please read these
warnings and cautions, along with all decals, carefully
before attempting to operate the unit. Make sure every
individual who operates or works with this equipment is
familiar with all safety precautions.
WARNING
GENERAL WARNING. Indicates information
important to the proper operation of the
equipment. Failure to observe may result in
damage to the equipment and/or severe bodily
injury or death.
CAUTION
GENERAL CAUTION. Indicates information
important to the proper operation of the
equipment. Failure to observe may result in
damage to the equipment.
Safety Precautions
LETHAL EXHAUST GAS: An internal
combustion engine discharges carbon
monoxide, a poisonous, odorless, invisible
gas. Death or serious illness may result if
inhaled. Operate only in an area with proper
ventilation. NEVER OPERATE IN A
CONFINED AREA!
DANGEROUS FUELS: Use extreme caution
when storing, handling and using fuels, as
they are highly volatile and explosive in vapor
state. Do not add fuel while engine is running.
Stop and cool the engine before adding fuel.
DO NOT SMOKE!
SAFETY GUARDS: It is the owner's
responsibility to ensure that all guards and
shields are in place and in working order.
IGNITION SYSTEMS: Breakerless, magneto,
and battery ignition systems can cause severe
electrical shocks. Avoid contacting these
units or their wiring.
SAFE DRESS: Do not wear loose clothing,
rings, wristwatches, etc. near machinery.
NOISE PROTECTION: Wear OSHA specified
hearing protection devices.
EYE PROTECTION: Wear OSHA specified
eye shields, safety glasses, and sweat bands.
FOOT PROTECTION: Wear OSHA specified
steel-tipped safety shoes.
HEAD PROTECTION: Wear OSHA specified
safety helmets.
DUST PROTECTION: Wear OSHA specified
dust mask or respirator.
OPERATOR: Keep children and bystanders
off and away from the equipment.
REFERENCES: For details on safety rules and regulations
in the United States, contact your local Occupational Safety
and Health Administration (OSHA) office. Equipment
operated in other countries must be operated and serviced
in accordance and compliance with any and all safety
requirements of that country. The publication of these
safety precautions is done for your information. MBW does
not by the publication of these precautions, imply or in any
way represent that these are the sum of all dangers present
near MBW equipment. If you are operating MBW
equipment, it is your responsibility to insure that such
operation is in full accordance with all applicable safety
requirements and codes. All requirements of the United
States Federal Occupational Safety and Health
Administration Act must be met when operated in areas that
are under the jurisdiction of that United States Department.
Safety Decals
Carefully read and follow all safety decals. Keep them in
good condition. If decals become damaged, replace as
required. If repainting the unit, replace all decals. Decals
are available from authorized MBW distributors. Order the
decal set listed on the following page(s).
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- 2 -
Safety Decals (Decal Set #15074)
Before Towing:
1. Check running gear and tow bar.
2. Lock drum in tow position.
3. Check tow pin for proper instal-lation
and good condition.
4. USE SAFETY CHAINS when towing.
MAXIMUM TOW SPEED: 50 mph
Improper towing can lead to
damage or injury.
CAUTION(PRECAUCIÓN)
15072
Un remolque incorrecto
puede provocar daños
materiales o lesiones.
Antes del remolque:
1. Revise el funcionamiento de los
engranajes y de la barra de remolque.
2. Bloquee el tambor en la posición de
remolque.
3. Verifique que el pasador de remolque
esté bien instalado y en buen estado.
4. USE CADENAS DE SEGURIDAD al
remolcar la máquina.
MÁX. VELOCIDAD DE REMOLQUE:
80 KPH
MI
X
IDLE
17129 RALENTÍ
MEZCLA
01554 - Not included with decal set
17129
15072
STOP
CAUTION(PRECAUCIÓN)
15070
Failure to comply could result in serious bodily injury
El no cumplir con estas instrucciones puede producir como resultado lesiones corporales graves.
Read the operating instructions before operating this piece of equipment.
Lea las Instrucciones Operativas antes de hacer funcionar esta parte del equipo.
Keep unauthorized, inexperienced, untrained people away from this equipment.
Mantenga a las personas no autorizadas y sin entrenamiento alejadas de este equipo.
ROTATING AND MOVING PARTS! Make sure all guards and safety devices are in
place.
¡HAY PIEZAS ROTATIVAS Y MÓVILES! Asegúrese de que todas las guardas y
dispositivos de seguridad estén colocados en sus lugares.
DO NOT RUN this machine in an exnclosed area. The engine produces carbon
monoxide, a POISONOUS gas.
NO HAGA FUNCIONAR esta máquina en una zona encerrada. El motor produce
monóxido de carbono, un GAS VENENOSO.
SHUT OFF the engine before servicing, cleaning or adding fuel to engine or machine.
APAQUE el motor antes de hacerle el servicio, limiarlo o agregarle combustible.
15070
U.S. PATENT 6,695,467
17949
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- 3 -
Safety Decals (Decal Set #15074)
WARNING
ENGINE EXHAUST IS HAZARDOUS IF INHALED
USE ONLY IN A WELL VENTILATED AREA
15076
EL GAS DEL ESCAPE DEL MOTOR ES
PELIGROSO SI SE INHALA
USE LA MÁQUINA SÓLO EN UNA ZONA BIEN
VENTILADA
ADVERTENCIA
WARNING
LAS PIEZAS MÓVILES PUEDEN IMPACTAR Y CORTAR
¡MANTENGA ALEJADAS SUS MANOS!
APAGUE EL MOTOR ANTES DEL SERVICIO.
15069
MOVING PARTS CAN CRUSH AND CUT
KEEP HANDS CLEAR!
SHUT OFF ENGINE OR MOTOR
BEFORE SERVICING.
ADVERTENCIA
15076
15069
01554 - Not included with decal set
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- 4 -
19791
WARNING
OPERATION OF THIS EQUIPMENT MAY
CREATE SPARKS THAT CAN START FIRES
AROUND DRY VEGETATION. A SPARK
ARRESTER MAY BE REQUIRED. THE
OPERATOR SHOULD CONTACT LOCAL FIRE
AGENCIES FOR LAWS OR REGULATIONS
RELATING TO FIRE PREVENTION
PUSH
TO
STOP
16546
PULSEPARA
DETENER
Safety Decals (Decal Set #15074)
MIXER(MEZCLADORA)
OPERATING INSTRUCTIONS
1. Check oil in engine crankcase.
2. MAKE SURE grid is CLOSED before starting and during operation.
3. Place engage lever in “IDLE” position before starting engine.
4. Open fuel valve.
5. Close choke on engine. A warm engine may not need to be choked.
6. Open throttle to “FAST” position.
7. Pull starter rope.
8. After starting, turn choke off, let engine warm up at idle.
9. Open throttle to “FAST” position, CLOSE SHROUD! Place
engagement lever in “MIX” position, charge mixer.
10. TO STOP: Place engagement lever in “IDLE” position, return throttle
to idle, close fuel valve, press stop button.
11. Before towing, check that drum is locked in towing position, and tow
pin is properly installed and in good condition.
MAXIMUM TOW SPEED: 50 MPH
MÁX. VELOCIDAD DE REMOLQUE: 80 KPH
15071
INSTRUCCIONES DE OPERACIÓN
1. Revise el aceite en el cárter del motor.
2. CERCIÓRESE de que la rejilla esté CERRADA antes del arranque y durante la
operación.
3. Coloque la palanca de engranaje en la posición de “RALENTÍ” antes de arrancar
el motor.
4. Abra la válvula de combustible.
5. Cierre el estrangulador del motor. Si el motor está tibio, puede que no requiera
estrangulamiento.
6. Abra el acelerador a la posición “RÁPIDA”.
7. Tire de la cuerda de arranque.
8. Tras el arranque, apague el estrangulador y deje que el motor se caliente en
ralentí.
9. Abra el acelerador y póngalo en la posición “RÁPIDA”, ¡CIERRE LA CUBIERTA!
Coloque la palanca de engranaje en la posición de “MEZCLA”, cargue la
mezcladora.
10. PARA DETENERLA: Coloque la palanca de engranaje en la posición “RALENTÍ”,
vuelva el acelerador a ralentí, cierre la válvula de combustible y pulse el botón de
parada.
11. Antes del remolque, verifique que el tambor esté bloqueado en la posición de
remolque, y que el perno esté correctamente instalado y en buen estado.
15071
19791
15071
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- 5 -
SPECIFICATIONS
Specifications subject to change without notice.
MM120
Batch Capacity 12 cu. ft. (0.34 cu. m.)
Batch Size 3.5 - 4.5 bags
Gas Engine Honda GX390 20.6 in.³(389 cm³)
Engine Speed 3300 rpm
Drivetrain Enclosed Gearbox and Mechanical Clutch
Axle 61” torsion axle
Wheels ST175/80D13 high-speed
Size - W x L x H 61 x 86 x 57 in (155 x 218 x 145 cm)
Weight 985 lbs (447 kg)
Charging Height 49 in (124 cm)
MM120
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- 6 -
OPERATION
Introduction
MBW equipment is intended for use in very severe
applications. They are powered by four cycle engines and
are available in different sizes and a selection of engines.
This parts manual contains only standard parts. Variations
of these parts as well as other special parts are not included.
Contact your local MBW distributor for assistance in
identifying parts not included in this manual.
Before Starting & Operating
• REMEMBER! It is the owner’s responsibility to
communicate information on the safe use and proper
operation of this unit to the operators.
• Review ALL of the Safety Precautions listed on page 1 of
this manual.
• Familiarize yourself with the operation of the machine
and confirm that all controls function properly.
• Know how to STOP the machine in case of an
emergency.
• Make sure hands, feet, and clothing are at a safe
distance from any moving parts.
• OIL LEVEL - Check the oil level in the engine. For more
information see “Lubrication” under the respective
engine’s “Owners Manual” or the Maintenance section of
this manual.
• AIR CLEANER - Check to ensure element is in good
condition and properly installed.
• FUEL SUPPLY - The engines on MBW equipment
require an automotive grade of clean, fresh, unleaded
gasoline.
• FUEL FILTER - If clogged or damaged, replace.
Starting Engine
1. Check that engagement lever is in the “IDLE”
position.
2. Open fuel valve.
3. Pull out the stop switch on engine shroud, turn engine
switch to “ON” position.
4. Set throttle to idle.
5. Choke engine if necessary (you may not need to
choke a warm engine).
6. Pull starter rope repeatedly until engine starts.
7. Move choke lever to open position.
8. Allow engine to warm up for one or two minutes.
Operating
1. Open throttle fully.
2. Close the engine shroud.
WARNING
Never operate the mixer with the shroud open.
3. Move engagement lever to the “MIX” position.
4. Add half of the required amount of sand and water for
the batch to be mixed.
5. Add the total required amount of mortar mix.
6. Add the remaining amounts of sand and water and al-
low time to mix properly.
7. Unlock the drum by rotating the locking bar out of en-
gagement with the frame.
8. Tip the drum forward to discharge the batch.
9. Return drum to mixing position and check that it is
locked in place.
10. If another batch is to be mixed, add water for the next
batch.
CAUTION
Always clean the drum after each day’s operation.
See Cleaning, page 8.
Stopping Engine
1. Move throttle to idle position.
2. Let engine idle for one or two minutes.
3. Push in the stop switch on engine shroud.
4. Close fuel valve.
WARNING
Always stop the engine before:
Adding fuel.
Leaving the equipment unattended for any
amount of time.
Towing
1. Stop the engine.
2. Close fuel valve.
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- 7 -
3. Close and latch the engine shroud.
4. Rotate the drum into the locked position, and check
that it is locked in place.
5. Secure the tow pole and safety chains to the vehicle.
WARNING
Always check that axle, front leg, and tow bar
hardware is tight before towing.
Make sure safety bolt is in place.
Check the condition of the pin on the tow bar and
make sure it is secure.
Remove any loose debris from the mixer before
towing on roads.
Check that safety chains cross each other when
attached.
MAXIMUM TOW SPEED: 50 mph
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- 8 -
MAINTENANCE
WARNING
Always exercise the stopping procedure before
servicing or lubricating the unit.
After servicing the unit, replace and fasten all
guards, shields, and covers to their original
positions before resuming operation.
CAUTION
Always verify fluid levels and check for leaks after
changing fluids.
Do not drain oil onto ground, into open streams,
or down sewage drains.
Maintenance Schedule
1. Check all hardware after the first 5 hours of use, then follow the maintenance schedule.
2. Retorque the lug nuts, and front leg and axle hardware after the first 25 miles traveled, then follow the maintenance schedule.
3. Change gearbox oil after first 20 hours, then follow the maintenance schedule.
Fluid Levels
Engine Maintenance
Refer to the engine owner’s manual for maintenance
intervals and procedures.
Engine Speed
Engine speed is factory set according to the speeds listed in
the Specifications section of this manual. Refer to the en-
gine owner’s manual for procedure on setting operating
speed if necessary.
Cleaning
Always clean the mixer thoroughly after each day’s opera-
tion. Dried mortar inside the drum can damage the paddles
and shorten the life of the mixer. Additionally, future batches
of mortar can be contaminated if the drum is not clean.
CAUTION
Do not beat on the drum to clean dried mortar;
this will cause damage to the drum.
WARNING
Always stop engine or motor and disconnect
spark plug wire before placing hands or objects
inside drum.
Always reconnect safety grid opener to grid after
cleaning drum.
SYSTEM MAINTENANCE EACH USE EVERY 40
HOURS
EVERY 100
HOURS YEARLY
Axle Check tire pressure XX
Grease wheel bearings X
Drum Grease trunnions & pillow blocks X
Engine Refer to engine operator/owner manual X
Gearbox Check enclosed gearbox oil X
Change enclosed gearbox oil 3X
Hardware Check and tighten all hardware 1, 2 X
SYSTEM FLUID VOLUME RECOMMENDED OIL
Enclosed Gearbox Oil 32 oz. Chevron 680 (140-wt.) Worm Gear Oil
Engine Refer to engine operator/owner manual
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- 9 -
Lubrication
1. Grease both trunnions and pillow blocks daily. There
are two grease fittings on each side of the drum.
2. Oil clutch yoke shaft every 50 hours at the pivot
points (see Figures 1 & 2).
Checking Gearbox Oil
1. Remove check plug on side of gearbox.
2. Oil level should be even with bottom of check plug.
3. If low, add oil by removing the breather plug on top of
gearbox. Change oil if it appears dark brown or
smells burnt. Gearbox is shipped with 32 oz. of
Chevron 680 (140-wt.) worm gear oil. Any 90-wt., or
heavier, gear oil is acceptable for this gearbox. Do
not mix different types of oil.
4. Apply pipe sealant to check plug and breather plug
and reinstall them.
Changing Gearbox Oil
1. Remove breather plug on top of gearbox.
2. Remove magnetic drain plug on bottom of gearbox
and drain oil into pan.
3. Clean drain plug thoroughly.
4. Apply pipe sealant to drain plug and reinstall.
5. Add 32 oz. of gear oil. Chevron 680 (140-wt.) worm
gear oil is recommended, however any 90-wt., or
heavier, gear oil is acceptable.
6. Apply pipe sealant to breather plug and reinstall.
Adjusting Clutch
If clutch begins to slip, or if a positive snap is not felt when
engaging or disengaging clutch, the clutch should be
adjusted. Failure to do so could result in premature clutch
failure. The following procedure is easier if shroud is
removed (see Engine Shroud Removal, page 11).
1. Move engagement handle to “IDLE” position.
2. Stop engine and disconnect spark plug wire. Allow
gearbox and clutch to cool before continuing.
3. Remove the access cover which is secured with four
bolts.
4. Using the recoil starter, rotate the clutch so the
locking tab and bolt are facing up. Loosen bolt.
5. Hold the clutch body from rotating, and turn the
adjusting plate clockwise to increase the pressure on
the clutch disk. NOTE: It is easiest to use a flat
screwdriver against the teeth on the adjusting plate to
rotate it. Rotate the plate a small amount and check
it by engaging the mixer. If a positive snap is not felt,
rotate the plate further. If excessive force is required
to engage it, or if it does not engage, rotate the
adjusting plate counter-clockwise to decrease the
pressure.
6. Retighten the locking tab onto the teeth to hold the
adjusting plate in place.
7. Using a sprayable grease, lubricate all linkages and
moving parts of the clutch to increase the life of the
clutch.
8. Reinstall the access cover and tighten all four bolts.
9. Reconnect spark plug wire and start engine. Check
that a positive snap is still felt while running.
FIGURE 1
CHECK PLUG
BREATHER /
FILL PLUG
OIL PIVOT
FIGURE 2
DRAIN PLUG
OIL PIVOT
LOCKING TAB
ADJUSTING PLATE
DECREASE
PRESSURE
INCREASE
PRESSURE
FIGURE 3
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- 10 -
Greasing Wheel Bearings
1. Jack the rear end of the mixer and support by side
rails so that mixer is stable.
2. Remove the wheel.
3. Remove the dust cover.
4. Remove the cotter pin from the spindle nut.
5. Unscrew the spindle nut.
6. Remove the hub from the spindle, being careful not
to allow the outer bearing cone to fall out. The inner
bearing cone will be retained by the seal.
7. Remove the grease seal.
8. Wash all grease and oil from the bearing cones and
inspect each roller. If any pitting, spalling, or
corrosion is present, then the bearing cup and cone
must be replaced.
9. Pack the entire bearing with grease, apply a light coat
of grease to the bearing cup, and install.
10. Tap a new grease seal into place with a clean block.
11. Slide the hub onto the spindle.
12. While rotating the hub slowly, tighten the spindle nut
to approximately 50 lb-ft.
13. Loosen the spindle nut, but DO NOT rotate the hub.
14. Finger tighten the spindle nut until snug.
15. Back the spindle nut out slightly until the first
castellation lines up with the cotter pin hole and insert
the cotter pin.
16. Bend over the cotter pin legs to secure the nut.
17. Tap the dust cover into the hub.
18. Install wheel and torque lug nuts to 90 lb-ft.
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- 11 -
SERVICE
Assembly and disassembly should be performed by a
service technician who has been factory trained on MBW
equipment. The unit should be clean and free of debris.
Pressure washing before disassembly is recommended.
• Prior to assembly, wash all parts in a suitable cleaner or
solvent.
• Check moving parts for wear and failure. Refer to the
Replacement section in this manual for tolerance and
replacement cycles.
• All shafts and housings should be oiled prior to pressing
bearings. Also, ensure that the bearings are pressed
square and are seated properly.
• All bearings should be replaced when rebuilding any
exciter or gearbox.
• All gaskets and seals should be replaced after any
disassembly.
Torque Chart
Engine Shroud Removal
Refer to Gearbox Drivetrain Assembly, page 20.
1. Disconnect wiring harness (#7) from engine by un-
screwing ring terminal from engine and unplugging
bullet connector.
2. Remove automatic safety grid lifter from safety grid.
3. Remove four bolts (#22), washers (#24), and lock-
nuts (#23) securing shroud to frame.
4. Carefully lift shroud straight up to avoiding damaging
engine or drive components. Approximate weight is
100 pounds.
Engine Shroud Installation
Refer to Gearbox Drivetrain Assembly, page 20.
1. Lift shroud over engine and drive components and
lower it straight down onto frame. Hold grid opener
out of the way while lowering.
2. Align shroud with edges of frame and tighten bolts
(#22), washers (#24), and locknuts (#23) in place.
3. Lift grid opener into position and pin to safety grid.
4. Connect wiring harness (#7) to engine by grounding
the ring terminal to the engine and inserting the bullet
connector into the splice terminal.
Drum Removal
Refer to Drum Assembly, page 16.
1. Remove engine shroud before attempting to remove
mixing drum.
2. Disassemble connecting link on chain coupling and
remove chain.
3. Mark the front and rear pillow block (#5) locations on
the frame to aid in the alignment during installation.
4. Remove all four bolts (#25), washers (#28 & #10),
lockwashers (#27), and locknuts (#26) holding drum
pillow blocks to frame.
5. If lifting drum by hoist, wrap chain around main shaft
and pass chain through paddles to stabilize. If lifting
drum by forklift, place blocks on forks to prevent drum
from rolling. Approximate weight is 400 pounds.
Drum Installation
Refer to Drum Assembly, page 16.
1. Lower drum onto frame supports. Pillow blocks (#5)
should be snug to trunnions (#8) to eliminate
excessive endplay.
SIZE GRADE 2 GRADE 5 GRADE 8
1/4-20 49 in•lbs 76 in•lbs 9 ft•lbs
1/4-28 56 in•lbs 87 in•lbs 10 ft•lbs
5/16-18 8 ft•lbs 13 ft•lbs 18 ft•lbs
5/16-24 9 ft•lbs 14 ft•lbs 20 ft•lbs
3/8-16 15 ft•lbs 23 ft•lbs 33 ft•lbs
3/8-24 17 ft•lbs 26 ft•lbs 37 ft•lbs
7/16-14 24 ft•lbs 37 ft•lbs 52 ft•lbs
7/16-20 27 ft•lbs 41 ft•lbs 58 ft•lbs
1/2-13 37 ft•lbs 57 ft•lbs 80 ft•lbs
1/2-20 41 ft•lbs 64 ft•lbs 90 ft•lbs
9/16-12 53 ft•lbs 82 ft•lbs 115 ft•lbs
5/8-11 73 ft•lbs 112 ft•lbs 159 ft•lbs
5/8-18 83 ft•lbs 112 ft•lbs 180 ft•lbs
3/4-16 144 ft•lbs 200 ft•lbs 315 ft•lbs
1-8 188 ft•lbs 483 ft•lbs 682 ft•lbs
1-14 210 ft•lbs 541 ft•lbs 764 ft•lbs
1-1/2-6 652 ft•lbs 1462 ft•lbs 2371 ft•lbs
M 6 3 ft•lbs 4 ft•lbs 7 ft•lbs
M 8 6 ft•lbs 10 ft•lbs 18 ft•lbs
M 10 10 ft•lbs 20 ft•lbs 30 ft•lbs
CONVERSIONS
in•lbs x 0.083 = ft•lbs
ft•lbs x 12 = in•lbs
ft•lbs x 0.1383 = kg•m
ft•lbs x 1.3558 = N•m
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2. Check alignment between the two coupler sprockets.
Sprockets must be parallel and in-line. Adjust drum
location if necessary.
3. Bolt pillow blocks to frame using four bolts (#25),
washers (#28 & #10), lockwashers (#27), and lock-
nuts (#26).
4. Dump drum to check for binding. If binding is noticed,
loosen bolts and realign pillow blocks.
5. Reassemble the coupling chain and install the con-
necting link.
6. Reinstall the engine shroud.
Drum Bearing & Seals Replacement
Refer to Drum Assembly, page 16.
1. Remove mixing drum from mixer. See Drum
Removal, page 11.
2. Loosen set screws and remove coupling sprocket
from main shaft. Use a puller if necessary.
3. Slide pillow blocks (#5) off of trunnions (#8).
4. Loosen set screw and remove locking collars from
trunnion bearings (#4) by rotating the collars against
the mixing direction of the paddles.
5. Remove four bolts (#19) and nuts (#22) holding each
trunnion to the drum.
6. While supporting the main shaft, slide the trunnion off
of each end.
7. Pull the triple seal kit (#9) out of the back side of each
trunnion and discard.
8. Remove the retaining ring (#7) from each trunnion.
9. Remove the ball bearing and grease shield (steel
washer) from the front side of each trunnion.
10. Inspect the bearings, and replace both if needed.
11. Thoroughly clean all grease from the trunnions.
12. Apply a medium strength thread locking compound to
each outer bearing surface and reinstall the bearings
and grease shields into the trunnions.
13. Reinstall the retaining rings.
14. Install new seal kits into the back side of each
trunnion in the following order: Steel Washer, Soft
Black Seal, Steel Washer, Soft Black Seal, Steel
Washer, Hard Red Seal.
15. Slide trunnions onto each shaft end and bolt in place.
16. Slide bearing locking collar onto front shaft end and
align shaft flush with collar.
17. Lock collar in place by driving in the mixing direction.
18. Tighten set screw using a medium strength thread
locking compound. Torque set screw to 20 ft/lbs.
19. Repeat process for rear bearing.
20. Begin pumping grease into trunnion cavity while
rotating main shaft back and forth. NOTE: If grease
comes out through ball bearing seals, check that
grease shield (steel washer) is installed and that
bearing is fully seated in trunnion and cannot move.
21. Continue pumping grease until drum seals “pop out”
into drum. Clean any excess grease from inside
drum.
22. Slide pillow blocks onto trunnions and grease until a
film of grease is seen all around the trunnion.
23. Reinstall the chain coupler sprocket. Tighten set
screws using a medium strength thread locking
compound.
24. Reinstall mixing drum onto frame. See Drum
Installation, page 11.
Engine & Gearbox Removal
Refer to Gearbox Drivetrain Assembly, page 20.
1. Remove engine shroud before attempting to remove
engine and gearbox. See Engine Shroud Removal,
page 11.
2. Disengage clutch by moving engagement handle into
“IDLE” position.
3. Disassemble connecting link (#15) on chain coupling
and remove chain (#10).
4. Unbolt ball joint from actuator (#12) by removing nut
(#27) and lockwasher (#28).
5. Remove four bolts (#25), washers (#29),
lockwashers (#28), and nuts (#26) holding engine to
frame.
6. Lift engine and gearbox (#14) off of frame by lifting
eye located on clutch housing cover. Approximate
weight is 200 pounds.
Engine & Gearbox Installation
Refer to Gearbox Drivetrain Assembly, page 20.
1. Lower the engine and gearbox onto the mixer frame.
2. Align holes and install bolts (#25), washers (#29),
lockwashers (#28), and nuts (#26) to secure engine.
Do not tighten.
3. Line up both coupling sprockets (#11). If they are out
of vertical alignment, loosen the jam nuts (#31) on the
shock mount (#2) and adjust the height. Retighten
jam nuts.
4. Reassemble coupling chain (#10) to sprockets and
install connecting link (#15).
5. Tighten engine hardware.
6. Bolt ball joint to actuator (#12) using nut (#27) and
lockwasher (#28). If linkage does not fit properly, ad-
just length by loosening both jam nuts and turning
rod. Retighten jam nuts.
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Engine & Gearbox Disassembly
Refer to Gearbox Drive Assembly, page 18.
1. Remove engine and gearbox from mixer. See Engine
& Gearbox Removal, page 12.
2. Remove the access cover (#13) which is secured by
four bolts (#15).
3. Remove the two bolts (#14) and lock washers (#18)
and loosen the two set screws (#17) from the clutch
yoke (#7). Clutch must be disengaged to gain access
to bolts.
4. Remove retaining ring (#3) on yoke shaft (#11).
5. Slide shaft out of gearbox and remove clutch yoke.
6. While maintaining support of gearbox, remove four
bolts (#16) securing gearbox (#6) to engine adapter
plate (#10).
7. Slide engine and clutch out from inside gearbox.
8. Loosen two bolts on clutch body to remove from
engine crankshaft.
Engine & Gearbox Assembly
Refer to Gearbox Drive Assembly, page 18.
1. Assemble bushing (#2) and key (#8) to engine crank-
shaft.
2. Bolt adapter plate (#10) to engine (#1).
3. If clutch (#9) is not disengaged (popped out), pry
throw-out bearing away from adjusting plate to disen-
gage it.
4. Slide disengaged clutch (#9) onto crankshaft. Be
sure that clutch pilot bearing is bottomed out in clutch
body, and leave a clearance of 0.030” - 0.060” be-
tween bearing and crankshaft. Tighten clutch bolts al-
ternately, and apply a final torque of 23 lb-ft.
5. Slide gearbox (#6) onto engine. Rotate gearbox while
assembling to line up spline shafts.
6. Install four bolts (#16) and tighten gearbox in place.
7. Apply grease to forks of clutch yoke (#7), and place
inside housing on top of clutch pins.
8. Slide yoke shaft (#11) into housing and through yoke.
9. Install retaining ring (#3) onto shaft.
10. Bolt yoke to shaft using two bolts (#14) and lock
washers (#18) and tighten set screws (#17) in yoke.
11. Install access cover (#13) using four bolts (#15).
Gearbox Disassembly
Refer to Gearbox Assembly, page 22.
1. Disassemble gearbox from engine before continuing.
See Engine & Gearbox Disassembly, page 13.
2. Support gearbox so it stands upright. Remove
magnetic drain plug (#6) and drain oil.
3. Tip gearbox down onto a support so clutch housing
faces down.
4. Remove sprocket from output shaft. Use a puller if
necessary.
5. Remove all 11 bolts (#27) and nuts (#28) from
gearbox perimeter.
6. Lightly tap gearbox cover and pull it straight up to
remove from housing.
7. Simultaneously lift up on all three large gears until the
bearings are free from the housing. Then slide gears
apart from one another and remove from housing.
8. Remove retaining ring (#3) securing input shaft (#11).
9. Remove input shaft by pulling straight up.
10. Remove both seals (#22 & #23) from housing and
cover.
The following steps are only necessary if bearings or gears
need to be replaced.
CAUTION
Always replace any bearings which are removed
with a bearing puller.
11. Press bearing (#26) off of input shaft (#11). NOTE: Al-
ways support bearings by inner race when pressing
off of or onto shafts.
12. Using a bearing puller, remove both bearings (#1)
from pinion shaft (#10).
13. Remove retaining ring (#20) from shaft.
14. Press gear (#14) off of shaft and remove key (#2).
15. Pull both bearings (#5) off of pinion shaft (#9).
16. Remove retaining ring (#19) from shaft.
17. Press gear (#13) off of shaft and remove key (#24).
18. Pull both bearings (#17) off of output shaft (#15).
19. Remove retaining ring (#21) from shaft.
20. Press gear (#12) off of shaft and remove key (#18).
Inspect all keys and replace if they look worn or
damaged.
Gearbox Assembly
Refer to Gearbox Assembly, page 22.
1. Press bearing (#26) onto input shaft (#11). NOTE: Al-
ways support bearings by inner race when pressing
onto or off of shafts.
2. Install key (#2) into pinion shaft (#10).
3. Press gear (#14) onto shaft and install retaining ring
(#20).
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4. Press both bearings (#1) onto shaft.
5. Install key (#24) into pinion shaft (#9).
6. Press gear (#13) onto shaft and install retaining ring
(#19).
7. Press both bearings (#5) onto shaft.
8. Install key (#18) into output shaft (#15).
9. Press gear (#12) onto shaft and install retaining ring
(#21).
10. Press both bearings (#17) onto shaft.
11. Support gear case (#7) with clutch housing facing
down, and press seal (#22) into gear case.
12. Install assembled input shaft (#11) into gear case and
install retaining ring (#3).
13. Place all three assembled gear shafts into housing
and push them together until the bearings line up with
the bores and they drop into place.
14. Install two dowel pins (#4) and a new gasket (#16).
15. Assemble cover (#8) and press down firmly until seat-
ed.
16. Bolt cover to housing using all 11 bolts (#27) and nuts
(#28).
17. Press seal (#23) into cover. NOTE: Do not cut seal on
keyway.
18. Assemble key and sprocket to output shaft.
19. Use pipe sealant and install check plug (#29) and
magnetic drain plug (#6).
20. Fill with 32 oz. of 90-wt., or heavier, gear oil and install
breather plug (#25). Chevron 680 (140-wt.) worm
gear oil is recommended.
Parts Replacement Cycles and Tolerances
Bearings Replace anytime a bearing is rough, binding, discolored or removed from housing or
shaft.
Clutch Adjust clutch (see maintenance section of this manual) as needed.
Engine Components Refer to your engine manufacturer’s Owner’s Manual.
Hardware Replace any worn or damaged hardware as needed. Replacement hardware should
be grade 5 and zinc plated unless otherwise specified.
Safety Decals Replace if they become damaged or illegible.
Seals & Gaskets Replace if a leak is detected and at every overhaul or teardown.
V-Belts Replace if cracked, torn, or stretched to the point the belt won’t tension properly.
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- 15 -
REPLACEMENT PARTS
The warranty is stated in this book on page 18. Failure to
return the Warranty Registration Card renders the warranty
null and void.
MBW, Inc. has established a network of reputable
distributors with trained mechanics and full facilities for
maintenance and rebuilding, and to carry an adequate parts
stock in all areas of the country. Their sales engineers are
available for professional consultation. If you cannot locate
an M-B-W distributor in your area, contact MBW, Inc. or one
of our Sales Branches listed below.
When ordering replacement parts, be sure to have the
following information available:
• Model and Serial Number of machine when ordering
M-B-W parts
• Model and Serial Number of engine when ordering
engine parts
• Part Number, Description, and Quantity
• Company Name, Address, Zip Code, and Purchase
Order Number
• Preferred method of shipping
REMEMBER - You own the best! If repairs are needed,
use only M-B-W parts purchased from authorized
M-B-W distributors.
The unit’s serial number can be found in the following
locations:
• The model/serial number decal is located on the front
drum support, below the pillow block.
• The serial number is stamped on the mixer frame
between the shroud mounting holes.
• The serial number is stamped on the gearbox to the right
of the breather.
Write Model Number here
Write Serial Number here
DECAL
LOCATION
STAMPED
LOCATION
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Drum Assembly
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