TM 9-2320-260-34-2
16-28. CRANE GEARCASE MAINTENANCE (M816) (Cont'd)
12. Remove four screws (14) and lockwashers (13), motor mounting cap (l), and gasket (2) from gearcase
housing (8). Discard lockwashers (13) and gasket (2).
13. Remove coupling (3) from wormshaft (4).
14. Remove woodruff key (5) from wormshafi (4). Discard woodruff key (5).
15. Remove four screws (9), lockwashers (10), end cap (11), and gasket (12) from gearcase housing (8).
Discard lockwashers (10) and gasket (12).
16. Using arbor press, partially remove wormshaft (4) so that front bearing(6) is unseated from
gearcase housing (8).
CAUTION
Ensure rear bearing on shaft and front bore in gearcase housing
are alined before pressing rear bearing through front bore. Failure
to do so may result in damage to bearing or gearcase.
17. Aline rear bearing (7) and front, bearing bore in gearcase housing (8) and press wormshaft (4) from
gearcase housing (8).
18. Using mechanical puller, remove bushing (21) and front bearing (6) from wormshaft (4).
19. Press bushing (21) from front bearing (6).
20. Remove woodruff key (26) from wormshaft (4). Discard woodruff key (26).
21. Remove spring (22), spacer (23), and washer (24) from wormshaft (4).
22. Using mechanical puller, remove rear bearing (7) and bushing (31) from wormshaft (4).
23. Press bushing (31) from rear bearing (7).
24. Press woodruff key (27) from wormshaft (4). Discard woodruff key (27).
25. Remove spring (30), spacer (29), washer (28), and worm gear (25) from wormshaft (4).
c. Cleaning and Inspection
1. For general cleaning instructions, refer to para 2-8.
2. For general inspection instructions, refer to para. 2-9.
3. Inspect front wormshaft bearing (6), rear wormshaft bearing (7), spur gear bearing (20), spur
gear shaft (16), wormshaft (4), gearcase housing (8), cover (15), thrust washers (18) and (19), and
bushings (21) and (31) for damage and wear. Refer to table 16-15, Crane GearCase Wear Limits,
for measurements. Replace parts if worn or damaged.
Table 16-15. Crane Gearcase Wear Limits.
WEAR LIMITS/TOLERANCES
ITEM
ITEM/POINT OF MEASUREMENT
NO.
INCHES
MILLIMETERS
1.720
43.69
4
Wormshaft outer diameter minimum (2 places)
Wormshaft bearings
6,7
3.9364
99.98
Outer diameter
1.7717
45.00
Inner diameter
Gearcase housing
8
3.9379
100.25
Gearcase bore - maximum (2)
4.3315
110.02
Gearcase bore - maximum
Cover bearing bore - outer diameter - minimum
15
16-170
