TM 9-2320-366-20-5
17-3. M1084/M1086 BOOM
SHEAVE REPLACEMENT
This task covers:
a. Removal
c. Follow-On Maintenance
b. Installation
INITIAL SETUP
Equipment Conditions
Materials/Parts
Hoist cable payed out approximately 10 feet (TM 9-
Grease, Automotive and Artillery (GAA) (Item 22,
2320-366-10-1).
Engine shut down (TM 9-2320-366-10-1).
Tools and Special Tools
Personnel Required
(2)
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), key washer (3), and sleeve bushing (5)
from sheave pin (2). Discard key washer.
(4) Remove screw (6) and washer (7) from lock pin (8).
(5) Remove lock pin (8) from sheave pin (2).
NOTE
Boom sheave contains two roller bearing
assemblies which may fall out. The aid of an
assistant is required to support boom sheave
during removal of sheave pin.
(6) Remove sheave pin (2) and boom sheave (9) from boom
(10) and cable (11).
(7) Remove two roller bearing assemblies (12) from sheave
pin (2).