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, Inc. MBW (UK) Ltd. MBW FRANCE S.A.R.L. 250 Hartford Rd • PO Box 440 Slinger, WI 53086-0440 Phone: (262) 644-5234 Fax: (262) 644-5169 Email: mbw@mbw.com Website: www.mbw.
TABLE OF CONTENTS Safety Information . . . . . . . . . . . . . . . . . . . . . . 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Changing Hydraulic Filter . . . . . . . . . . . . . . . . . . . . . . 7 Changing Hydraulic Oil & Suction Strainer. . . . . . . . . 7 Greasing Wheel Bearings . . . . . . . . . . . . . . . . . . . . . 7 Safety Decals . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
SAFETY INFORMATION Introduction SAFE DRESS: Do not wear loose clothing, 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 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.
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. STOP SHUT OFF the engine before servicing, cleaning or adding fuel to engine or machine.
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 Engine / Motor Honda 13 hp Baldor 5 hp (1-phase) 230 V - 23 A Baldor 5 hp (3-phase) 230 V - 13.4 A 460 V - 6.7 A Engine / Motor Speed 3300 rpm 1725 rpm 1750 rpm Drivetrain Hydraulic Pump to Hydraulic Motor Honda 13 hp Baldor 5 hp (1-phase) 230 V - 23 A Baldor 5 hp (3-phase) 230 V - 13.4 A 460 V - 6.
OPERATION Introduction MBW equipment is intended for use in very severe applications. They are powered by reliable four cycle engines. 7. Move choke lever to open position. 8. Allow engine to warm up for one or two minutes. Starting Motor 1. 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.
Towing WARNING Always stop engine before adding fuel. Stop engine before leaving mixer unattended for any amount of time. 1. Stop the engine or motor. 2. Close and latch the engine shroud. 3. Secure the tow pole and safety chains to the vehicle. WARNING Stopping Motor 1. Push motor lever to “STOP”, or center, position. Always check that axle, front leg, and tow pole hardware is tight before towing. 2. Let motor cool for one or two minutes if warm. Make sure safety bolt is in place. 3.
MAINTENANCE WARNING CAUTION Always exercise the stopping procedure before servicing or lubricating the unit. Always verify fluid levels and check for leaks after changing fluids. After servicing the unit, replace and fasten all guards, shields, and covers to their original positions before resuming operation. Do not drain oil onto ground, into open streams, or down sewage drains.
3. Remove hydraulic filter which is accessible from the front opening of the engine shroud, or from underneath the frame. 4. Apply clean oil to filter gasket, and install new filter (MBW #08164). 5. Disconnect 3/4” hose (#26) from fitting (#18). 6. Remove strainer (#10) and fitting (#18) from tank. 7. Clean strainer thoroughly, replace if damaged. 8. Reinstall strainer and fitting into tank. Use hydraulic loctite to prevent leaks. 9. Reconnect hose to fitting.
SERVICE Engine Shroud Removal 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. Refer to Shroud & Chassis Assembly, page 12. 1. Disconnect wiring harness (#11) from engine by unscrewing ring terminal from engine and unplugging bullet connector from splice terminal (#5). 2. Disconnect automatic grid opener from grid. 3.
Drum Installation 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. Refer to Drum Assembly, page 14. 1. 2. Lower drum onto frame supports. Pillow blocks (#5) should be snug to trunnions (#8) to eliminate excessive endplay. 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.
8. Reinstall inspection cover. 9. Reinstall the engine shroud. 1,850 psi, the relief valve needs adjustment. NOTE: If pressure climbs over 1,850 psi, the engine may stall. Hydraulic Relief Valve Adjustment 5. Loosen the jam nut on the relief cartridge located on the left side of the valve block. 1. Remove the engine shroud. 6. 2. Install a pressure gage using the side port on the left side of the valve block (pressure port, P). The pressure gage must read to 2,000 psi.
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.
17 7 20 26 8 11 28 5 23 9 22 15 29 31 25 16 10 30 24 6 27 39 1 4 12 21 35 36 37 MM91 13 34 32 18 15 32 34 4 29 19 33 3 38 21 13 18 14 2 14 Shroud & Chassis Assembly - 12 - 2 14 19 3 14 38
ITEM 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39 PART NO.
11 18 3 1 25 8 4 9 12 10 26 16 22 2 15 21 7 6 16 23 24 2 25 5 13 19 20 14 17 Drum Assembly - 14 -
ITEM 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. PART NO.
9 16 8 13 3 17 12 5 1 13 MOTOR 4 16 15 11 15 10 13 6 7 14 Paddle Assembly - 16 - 2 15
ITEM 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. PART NO.
Hydraulic Components - 18 -
ITEM 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. PART NO.
5 7 6 8 1 17 2 8 22 4 19 18 11 12 14 9 20 21 3 16 13 15 18 10 19 Engine Assembly - 20 - 1
ITEM 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22 PART NO.
WARRANTY WHAT DOES THIS WARRANTY COVER? MBW, Incorporated (MBW) warrants each New Machine against defects in material and workmanship for a period of twelve (12) months. "New Machine" means a machine shipped directly from MBW or authorized MBW dealer to the end user. This warranty commences on the first day the machine is sold, assigned to a rental fleet, or otherwise put to first use. batteries, and the like, all of which are sold AS IS/WHERE IS WITH ALL FAULTS.
