TM-9-2320-361-34
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
MAY 1992
TM-9-2320-361-34 - Page 439 of 764
TM 9-2320-361-34
15-37. DERRICK SHEAVE MAINTENANCE
THIS TASK COVERS:
a. Removal
d. Assembly
b. Disassembly
e. Installation
c. Cleaning and Inspection
INITIAL SETUP
APPLICABLE MODELS
REFERENCES (TM)
M764
TM
9-237
TM 9-2320-361-10
TOOLS
TM 9-2320-361-34P
General mechanic’s tool kit
(Appendix B, Item 1)
EQUIPMENT CONDITION
Outside micrometer (Appendix B, Item 17)
Parking brake set (TM 9-2320-361-10).
MATERIALS/PARTS
Lockwasher (Appendix F, Item 141)
Two locknuts (Appendix F, Item 108)
Graphite grease (Appendix C, Item
9)
a. Removal
Loosen two screws (11) and remove support block (4) from derrick tube (10).
b. Disassembly
1. Remove nut (6), lockwasher (5), screw (12), and pulley (1) from support block
(4).
Discard
lockwasher (5).
2.
Remove bearing sleeve (3) from pulley (1).
3. Remove two locknuts (7), screws (9), and sheave cover (8) from support block (4). Discard
locknuts (7).
I
c. Cleaning and Inspection
1. Clean all parts (para. 2-8).
2. Check support block (4) for cracks and other damage. If cracked, repair support block (4) by
welding (TM 9-237). Replace if otherwise damaged.
3. Check pulley (1) for cracks and other damage. Replace pulley (1) if worn or damaged.
4. Check bearing sleeve (3) for nicks, burrs, cracks, and wear. Outside diameter should be no less than
1.475 in. (37.5 mm). Raised metal can be removed with a fine mill file. Replace bearing sleeve (3) if
worn or damaged.
5. Check sheave cover (8) for bends and other damage. Straighten if bent. Replace sheave cover (8) if
damaged.
1. Install sheave cover (8) on support block (4) with two screws (9) and new locknuts (7).
2. Apply
graphite grease in bearing (2) and install bearing sleeve (3) in pulley (1).
3. Install
pulley (1), screw (12), new lockwasher (5), and nut (6) in support block (4).
d. Assembly
e. Installation
Install support block (4) in derrick tube (10) and tighten two screws (11).
15-128
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