MBW MM120 Service Manual

OPERATOR’S SAFETY

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AND SERVICE MANUAL

MM120

This manual covers the following serial numbers
and higher for each model listed:

MM120 . . . . . . . . . . . . . . . . . . . 7070040

MORTAR & PLASTER MIXERS

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L17590 / 06.11.G

©MBW, Inc. 2005

Printed in the USA

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TABLE OF CONTENTS

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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

WARNING

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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.

SAFETY INFORMATION

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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).

- 1 -

CAUTION(PRECAUCIÓN)

X

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Improper towing can lead to

damage or injury.

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

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:

15072

80 KPH

15072

CAUTION(PRECAUCIÓN)

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.

STOP

Failure to comply could result in serious bodily injury

El no cumplir con estas instrucciones puede producir como resultado lesiones corporales graves.

15070

15070

U.S. PATENT 6,695,467

17949

MI

MEZCLA

IDLE

17129

17129

Safety Decals (Decal Set #15074)

RALENTÍ

01554 - Not included with decal set

- 2 -

WARNING

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

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ADVERTENCIA

ENGINE EXHAUST IS HAZARDOUS IF INHALED

USE ONLY IN A WELL VENTILATED AREA

EL GAS DEL ESCAPE DEL MOTOR ES

PELIGROSO SI SE INHALA

USE LA MÁQUINA SÓLO EN UNA ZONA BIEN

15076

15076

VENTILADA

15069

01554 - Not included with decal set

Safety Decals (Decal Set #15074)

- 3 -

WARNING

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.

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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

19791

19791

PUSH

TO

STOP

PULSE PARA

DETENER

16546

15071

15071

Safety Decals (Decal Set #15074)

- 4 -

SPECIFICATIONS

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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)

Specifications subject to change without notice.

MM120

MM120

- 5 -

OPERATION

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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.

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 al­low time to mix properly.

7. Unlock the drum by rotating the locking bar out of en­gagement 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.

• 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.

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.

- 6 -