TM 9-4940-568-20
5-35
5-7.
BOOM NOSE SHEAVE REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP
Tools
Tool Kit, General Mechanic’s
(Item 30, Appendix G)
Materials/Parts
Grease (Item 21, Appendix C)
Sealing compound (Item 32, Appendix C)
Lockwasher (Item 65, Appendix F)
Equipment
Condition
FRS unloaded (TM 9-4940-568-10)
Hoist cable extended approximately
10 feet. (TM 9-4940-568-10)
a. Removal
(1) Remove grease fitting (1) from sheave
pin (2).
(2) Straighten tab on key washer (3) from
detent in nut (4).
(3) Remove nut (4) and key washer (3).
(4) Remove screw (5), lockwasher (6),
washer (7) and bushing (8) from sheave
pin (9). Discard lockwasher (6).
(5) Remove sheave (10) from sheave pin
(2).
NOTE
Support
sheave
(10)
during removal of sheave
pin (2). Sheave (10) has
two
roller
bearing
assemblies (12) inside hub
which may fall out.
(6) Remove sheave pin (2) and sheave
(10) from boom (11).
(7) Remove two roller bearing assemblies
(12) and bearing spacer (13) from
sheave (10).
NOTE
Perform step (8) only if
bearing cups (14) are
damaged.
(8) Remove two bearing cups (14) and
bearing cup spacer (15) from sheave
(10).
CABLE AND BOOM LIGHT
REMOVED FOR CLARITY
