MBW MM121 - Manual (Page 11)

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S
ERVICE
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 gaskets and seals should be replaced after any
disassembly.
Torque Chart
Engine Shroud Removal
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. Remove four bolts (#26), washers (#28), and lock
nuts (#27) securing engine shroud to frame.
4. Carefully lift shroud straight up and tilt to get around
valve block handles. Approximate weight is 85
pounds.
Engine Shroud Installation
Refer to Shroud & Chassis Assembly, page 12.
1. Lift shroud over engine and drive components and
lower it down and around valve block handles. Hold
grid opener out of the way when lowering.
2. Align engine shroud with edges of frame and tighten
four bolts (#26), washers (#28), and lock nuts (#27) in
place.
3. Lift grid opener into position and pin to grid.
4. Connect wiring harness (#11) to engine by grounding
the ring terminal to the engine and inserting the bullet
connector into the splice terminal (#5).
Drum Removal
Refer to Drum Assembly, page 14.
1. Remove engine shroud before attempting to remove
the mixing drum.
2. Disassemble the connecting link on the chain coupler
and remove the chain.
3. Remove spring pin from the hydraulic cylinder’s top
clevis pin, and pull clevis pin halfway out.
4. Rotate cylinder out of engagement with drum and
reinstall clevis pin and spring pin.
5. Mark the front and rear pillow block (#5) locations on
the frame to aid in the alignment during installation.
6. Remove four bolts (#19), lock washers (#20), and
washers (#21) holding drum pillow blocks to frame.
7. Slide mounting bar (#13) out of front support tube.
8. 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.
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