MBW AT84 - Manual (Page 10)

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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 bearings should be replaced when rebuilding any
exciter or gearbox.
• All gaskets and seals should be replaced after any
disassembly.
Torque Chart
Service Tools
Replacing Shockmounts
1. Support roller to prevent it from rolling, and remove
hydraulic hoses from motor.
2. Remove the two bolts securing the hydraulic motor
and remove the motor.
3. Remove all external shockmount hardware while
supporting frame. Lift frame assembly off of drum
assembly.
4. Pull spider off of drum.
5. Replace shockmounts as needed.
6. While spider is removed, inspect coupling and seal
for excessive wear. Replace if needed.
7. Reinstall spider onto drum and then into the frame
8. Install motor, align with coupler and secure with
mounting screw and lock washer. Use a medium
strength thread locker. Make sure motor mount
surface bottoms out in frame.
9. Connect hoses.
Replacing Input Seal
Refer to Main Assembly, page 14.
1. Remove drum assembly from frame and spider from
drum (See “replacing shockmounts” steps 1-4)
2. Using a seal puller, remove seal. Note it is not
necessary to remove gear coupler (#15)
3. Inspect the sealing surface on the shaft for wear or
damage.
4. If the shaft has any sign of wear or damage, remove
the gear coupler (#15) and use the sleeve included
with seal. (Follow instructions included with seal kit).
If the shaft is in good condition install only the seal.
Use a seal protector when installing the seal.
Removing Drive Coupler
Refer to Main Assembly, page 14.
1. Remove hydraulic lines from motor.
2. Remove hydraulic motor (# 6).
3. Remove drive coupler (# 13) gear from motor by
loosening clamping screw.
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
Part # Description
07353 CLUTCH REMOVAL TOOL