TM-9-2320-272-24-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 2 OF 4
JUNE 1998
TM-9-2320-272-24-2 - Page 84 of 991
TM 9-2320-272-24-2
3-245. WINCH FRAME EXTENSION REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP:
APPLICABLE MODELS
REFERENCES (TM)
All w/winch
TM 9-2320-272-24P
TOOLS
EQUIPMENT CONDITION
General mechanic’s tool kit (Appendix E, Item 1)
Torque wrench (Appendix E, Item 144)
• Front bumper and plates removed (para. 3-243).
• Front winch removed para. 3-329).
MATERIALS/PARTS
Four locknuts (Appendix D, Item 309)
Twenty-four locknuts (Appendix D, Item 294)
Six lockwashers (Appendix D. Item 350)
• Hood removed (para. 3-275).
1.
Remove six screws (9), lockwashers (8), washers (7), and two brackets (10) from frame extensions (1).
Discard lockwashers (8).
2.
Remove four locknuts (12), screws (5), washers (4), and two loop tiedowns (3) from frame
extensions (1). Discard locknuts (12).
3.
Remove eight locknuts (11), screws (6), and two frame extensions (1) from channel reinforcements (2).
Discard locknuts (11).
4.
Remove four locknuts (21), screws (13), and washers (14) from two end supports (23) and cross-
member (24). Discard locknuts (21).
5.
Remove four locknuts (22), screws (17), and two end supports (23) from channel reinforcements (2).
Discard locknuts (22).
6.
Remove eight locknuts (15), screws (16), two screws (20), washers (19), and two channel
reinforcements (2) from frame rails (18). Discard locknuts (15).
b. Installation
1.
2.
3.
4.
5.
6.
Install two channel reinforcements (2) on frame rails (18) with eight screws (161, new locknuts (15),
two washers (19), and screws (20). Tighten locknuts (15) and screws (20) 85 lb-ft (115 N•m).
Install two end supports (231 on channel reinforcements (2) with four screws (17) and new
locknuts (22). Tighten locknuts (22) 120 lb-ft (163 N•m).
Install two end supports (23) on crossmember (24) with four washers (141, screws (131, and new
locknuts (21). Tighten locknut-s (21) 120 lb-ft (163 N•m).
Install two frame extensions (1) on channel reinforcements (2) with eight screws (6) and new
locknuts (11). Tighten locknuts (12185 lb-ft (115 N•m).
Install two loop tiedowns (3) on frame extensions (1) with four washers (4), screws (5), and new
locknuts (12).
Install two brackets (10) on frame extensions (1) with six washers (7), new lockwashers (8), and
screws (9).
3-692
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