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OPERATOR’S SAFETY
AND SERVICE MANUAL
MM91 & MM121
This manual covers the following serial numbers
and higher for each model listed:
MM121 . . . . . . . . . . . . . . . . . . . 7090001
MM91.......................................7150001
MORTAR & PLASTER MIXERS
MBW FRANCE S.A.R.L.
MBW, Inc. MBW (UK) Ltd.
Z.A. d’Outreville
250 Hartford Rd • PO Box 440 UnitS 2 & 3 Crochrane Street
11 rue Jean Baptiste Néron,
Slinger, WI 53086-0440 Bolton BL3 6BN
60540 BORNEL
Phone: (262) 644-5234 Phone: 01204 38778
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TABLE OF CONTENTS Changing Hydraulic Filter . . . . . . . . . . . . . . . . . . . . . . 7 Safety Information . . . . . . . . . . . . . . . . . . . . . . 1 Changing Hydraulic Oil & Suction Strainer. . . . . . . . . 7 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Greasing Wheel Bearings . . . . . . . . . . . . . . . . . . . . . 7 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Safety Decals . . . . . . . . . . . . . . . . . . . . . . .
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WARNING 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.
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SAFETY INFORMATION SAFE DRESS: Do not wear loose clothing, Introduction rings, wristwatches, etc. near machinery. This Safety Alert Symbol is used to call attention to items or operations which may be dangerous to those operating or working with this NOISE PROTECTION: Wear OSHA specified equipment. The symbol can be found hearing protection devices. throughout this manual and on the unit. Please read these warnings and cautions, along with all decals, carefully EYE PROTECTION: Wear OSHA specif
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CAUTION Read the operating instructions before operating this piece of equipment. Keep unauthorized, inexperienced, untrained people away from this equipment. ROTATING & MOVING PARTS! Make sure all guards and safety devices are in place. DO NOT RUN this machine in an enclosed area. The engine produces carbon monoxide, a POISONOUS gas. SHUT OFF the engine before servicing, cleaning or adding fuel to engine or machine. STOP Failure to comply could result in serious bodily injury 15070 15070 CAUT
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SPECIFICATIONS MM91 MM121 Batch Capacity 9 cu. ft. (0.26 cu. m.) 12 cu. ft. (0.34 cu. m.) Batch Size 3 - 3.5 bags 3.5 - 4.5 bags Baldor 5 hp Baldor 5 hp Baldor 5 hp Baldor 5 hp (3-phase) (3-phase) Engine / Motor Honda 13 hp (1-phase) Honda 13 hp (1-phase) 230 V - 13.4 A 230 V - 13.4 A 230 V - 23 A 230 V - 23 A 460 V - 6.7 A 460 V - 6.7 A Engine / Motor Speed 3300 rpm 1725 rpm 1750 rpm 3300 rpm 1725 rpm 1750 rpm Drivetrain Hydraulic Pump to Hydraulic Motor Hydraulic Pump to Hydraulic Motor
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OPERATION 7. Move choke lever to open position. Introduction 8. Allow engine to warm up for one or two minutes. MBW equipment is intended for use in very severe applications. They are powered by reliable four cycle Starting Motor engines. 1. Check that both operating levers are in the STOP, or This parts manual contains only standard parts. Variations center, position. of these parts as well as other special parts are not included. Contact your local MBW distributor for assistance in identifyi
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Towing WARNING 1. Stop the engine or motor. Always stop engine before adding fuel. 2. Close and latch the engine shroud. Stop engine before leaving mixer unattended for 3. Secure the tow pole and safety chains to the vehicle. any amount of time. WARNING Stopping Motor Always check that axle, front leg, and tow pole hardware is tight before towing. 1. Push motor lever to “STOP”, or center, position. Make sure safety bolt is in place. 2. Let motor cool for one or two minutes if warm. 3. Push “STOP
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MAINTENANCE WARNING CAUTION Always exercise the stopping procedure before Always verify fluid levels and check for leaks after servicing or lubricating the unit. changing fluids. After servicing the unit, replace and fasten all Do not drain oil onto ground, into open streams, guards, shields, and covers to their original or down sewage drains. positions before resuming operation. Maintenance Schedule EVERY 40 EVERY 100 SYSTEM MAINTENANCE EACH USE YEARLY HOURS HOURS Axle Check tire pressure X Gr
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3. Remove hydraulic filter which is accessible from the WARNING front opening of the engine shroud, or from underneath the frame. Always stop engine or motor and disconnect spark plug wire or power cord before placing 4. Apply clean oil to filter gasket, and install new filter hands or objects inside drum. (MBW #08164). 5. Disconnect 3/4” hose (#26) from fitting (#18). Always reconnect safety grid opener to grid after cleaning drum. 6. Remove strainer (#10) and fitting (#18) from tank. 7. Clean
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SERVICE Assembly and disassembly should be performed by a Engine Shroud Removal service technician who has been factory trained on MBW Refer to Shroud & Chassis Assembly, page 12. equipment. The unit should be clean and free of debris. Pressure washing before disassembly is recommended. 1. Disconnect wiring harness (#11) from engine by unscrewing ring terminal from engine and unplugging • Prior to assembly, wash all parts in a suitable cleaner or bullet connector from splice terminal (#5). solv
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14. Install new seal kits into the back side of each Drum Installation trunnion in the following order: Steel Washer, Soft Refer to Drum Assembly, page 14. Black Seal, Steel Washer, Soft Black Seal, Steel Washer, Hard Red Seal. 1. Lower drum onto frame supports. Pillow blocks (#5) 15. Slide trunnions onto each shaft end and bolt in place. should be snug to trunnions (#8) to eliminate excessive endplay. 16. Slide bearing locking collar onto front shaft end and align shaft flush with collar. 2. C
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8. Reinstall inspection cover. 1,850 psi, the relief valve needs adjustment. NOTE: If pressure climbs over 1,850 psi, the engine may 9. Reinstall the engine shroud. stall. 5. Loosen the jam nut on the relief cartridge located on Hydraulic Relief Valve Adjustment the left side of the valve block. 1. Remove the engine shroud. 6. Turn the set screw in to increase the pressure setting 2. Install a pressure gage using the side port on the left and turn the set screw out to decrease the pressure side
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REPLACEMENT PARTS The warranty is stated in this book on page 34. Failure to return the Warranty Registration Card renders the warranty null and void. MBW has established a network of reputable distributors/
dealers 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 MBW distributor in your area, contact MBW
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20 17 7 26 8 11 28 5 23 15 9 29 22 31 25 16 10 30 24 6 27 39 1 4 12 21 35 36 37 13 MM91 34 32 2 18 14 19 3 14 38 15 32 34 4 29 19 33 3 38 21 13 18 2 14 14 Shroud & Chassis Assembly - 12 -
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ITEM PART NO. DESCRIPTION MM91 MM121 1. 01158 HITCH PIN 1 1 2. 01175 DUST COVER 2 2 3. 05844 WHEEL NUT, 1/2-20 8 8 4. 06442 WHEEL, ST175/80D13 2 2 5. 07592 SPLICE TERMINAL 1 1 6. 16564 TOW POLE, BALL HITCH (Includes 35-37) 1 1 16773 TOW POLE, PINTLE HITCH (Includes 35-37) 1 1 7. 16750 RUBBER BUMPER 1 1 8. 16783 SWITCH 1 1 9. 16813 METAL LATCH 2 2 10. 16816 CATCH PLATE, LATCH 2 2 11. 16820 WIRING HARNESS 1 1 12. 17158 HAIRPIN, 5/32” x 2-11/16” LONG 1 1 13. 17195 TORSION AXLE (Includes hubs) 1 186
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3 18 1 11 25 10 12 26 16 9 8 22 2 4 15 21 7 6 16 23 24 2 25 5 13 19 20 14 17 Drum Assembly - 14 -
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ITEM PART NO. DESCRIPTION MM91 MM121 1. 01056 HAIRPIN, 1/8” x 2-3/8” LONG 1 1 2. 01177 GREASE FITTING 4 4 3. 01280 SOCKET HEAD SHOULDER SCREW, 3/8” x 3/8” 1 1 4. 01550 BALL BEARING (Includes seal & locking collar) 2 2 5. 05002 PILLOW BLOCK 2 2 6. 05082 GRID SUPPORT BRACKET 2 2 7. 05475 RETAINING RING 2 2 8. 05665 TRUNNION 22 9. 05918 SEAL KIT 22 10. 16782 GRID OPENER 1 1 11. 17109 GRID, MM121 1 GRID, MM91 16781 1 17411 12. DRUM, MM121 1 18596 DRUM, MM91 1 13. 17511 MOUNTING BAR 1 1 14. 18598 DRU
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16 9 8 13 3 17 12 5 1 13 MOTOR 4 16 15 11 15 10 15 13 2 6 7 14 Paddle Assembly - 16 -
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ITEM PART NO. DESCRIPTION MM91 MM121 1. 17108 MAIN SHAFT, MM121 1 MAIN SHAFT, MM91 18601 1 2. 17570 PADDLE ASM, END RIGHT (Includes 6-7,10-11,13-17) 1 1 3. 17571 PADDLE ASM, CENTER RIGHT (Includes 8-9,13,17) 1 2 4. 17572 PADDLE ASM, CENTER LEFT (Includes 8-9,13,17) 1 2 5. 17573 PADDLE ASM, END LEFT (Includes 6-7,10-11,13-17) 1 1 6. 17574 RUBBER BLADE, END* 2 2 7. 18540 STEEL BLADE, END 2 2 8. 17576 RUBBER BLADE, CENTER* 2 4 9. 18543 STEEL BLADE, CENTER 2 4 10. 17578 RUBBER BLADE, WIPER* 2 2 11.
