Disassemble - Yale MSW030-F Maintenance Manual

630 YRM 1003
1. WIRE HARNESS
2. SLEEVE
3. NUT
4. LOCKWASHER
5. FLAT WASHER
6. BEARING CONE AND CUP
ASSEMBLY
7. BEARING CONE
8. BEARING CUP
9. BEARING CUP
10. BEARING CONE
11. ALLEN-HEAD SCREW
12. SPINDLE
13. O-RING
14. BALL BEARING
15. SPACER

DISASSEMBLE

Refer to Figure 3 for the following instructions.
NOTE: Total disassembly may not be necessary to re-
pair the MDU. Do only the steps necessary to complete
repairs.
The MDU can be removed from the lift truck to be com-
pletely disassembled. See Remove. However, certain
components may be removed with the MDU installed
in the truck. The drive motor, brake, drive wheel and
tire assembly, and pivot bushing (21) may be removed
with the MDU installed on the truck. The gear oil may
also be changed with the MDU installed. Where partial
disassembly of the MDU while installed is possible, as-
sembly, cleaning, and inspection of the MDU is much
easier when completely removed. The following steps
refer to the disassembly of an MDU which has been re-
moved from the drive unit compartment. See Figure 3.
1. Remove MDU from lift truck. Refer to Remove.
2. Place the MDU on a clean workbench.
3. Detach steering spindle by removing Allen-head
screws (11) if necessary.
4. Remove pivot bushings (21) if necessary.
CAUTION
Disposal of lubricants and fluids must meet local
environmental regulations.
5. Remove cover and drain oil:
Legend for Figure 3
16. BRAKE ASSEMBLY
17. BRAKE HUB
18. KEY
19. KEY
20. DRIVE MOTOR
21. PIVOT BUSHING
22. WASHER
23. CAPSCREW
24. DRIVE TIRE AND WHEEL
25. MDU
26. DRIVE AXLE
27. BEARING CONE AND SEAL
ASSEMBLY
28. BEARING CUP
29. PIN
30. DRIVE GEAR
Use a hammer and a soft punch when removing
bearings to avoid damage to bearings and/or cast-
ing.
6. Remove drive axle and bearings:
7. Remove gear and pinion assemblies and bearings:
31. NUT
32. BALL BEARING
33. GEAR AND PINION ASSEMBLY
34. GEAR AND PINION ASSEMBLY
35. NUT
36. GEAR
37. OIL SLINGER
38. CASTING
39. LOCKWASHER
40. CAPSCREW
41. FILL PLUG
42. ALLEN-HEAD SCREW
43. LOCKWASHER
44. COVER
45. ALLEN-HEAD SCREW
46. LOCKWASHER
a. Remove eight capscrews (40) and lockwashers
(39).
b. Remove two Allen-head screws (42) and wash-
ers (43).
c. Using the slots provided, gently pry the top and
bottom sides of cover alternately from the MDU.
d. Remove cover and place on a clean work-
bench.
e. Remove two pins (29) from MDU housing if
necessary.
CAUTION
a. Remove nut (31) and gear (30).
b. Remove drive axle.
c. Remove bearing cone and seal assembly (27).
a. Remove gear and pinion assemblies (33, 34)
by hand.
b. Remove bearings (32) from casting and cover.
Master Drive Unit Repair
5