TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 810 of 1015
TM 9-2320-272-24-1
3-162. FRONT SPRING SHACKLE REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP:
APPLICABLE MODELS
REFERENCES (TM)
All
LO 9-2320-272-12
TOOLS
TM 9-2320-272-10
TM 9-2320-272-24P
General mechanic’s tool kit (Appendix E, Item 1)
MATERIALS/PARTS
Two locknuts (Appendix D, Item 285)
Screw (Appendix D. Item 570)
EQUIPMENT CONDITION
Parking brake set (TM 9-2320-272-10).
Front wheels removed (para. 3-220 or 3-221).
1.
2.
3.
4.
5.
6.
7.
8.
9.
Raise vehicle to remove load from spring (12). Place jack stands under frame (16).
Remove locknut (1) and screw (3) from hanger (2). Discard locknut (1).
Remove locknut (6) from shackle (4). Discard locknut (6).
Loosen screw (7) in shackle (4).
Remove grease fitting (10) and lower shackle pin (9) from shackle (4) and spring eye (11). Pin (9)
must be pushed through toward underside of vehicle.
Remove grease fitting (15) and upper shackle pin (14) from shackle (4) and hanger (2). Pin (14) must
be pushed through to underside of vehicle.
Remove shackle (4) from hanger (2).
Remove screw (7) from hanger (2). Discard screw (7).
Remove bushing (5) from shackle (4).
1.
Install bushing (5) in shackle (4).
2.
Loosely thread new screw (7) on shackle (4).
3.
Install shackle (4) on hanger (2).
4.
Install shackle pin (14) in shackle (4) and hanger (2). Ensure pin slot (13) is positioned downward to
allow installation of screw (3).
5.
Install grease fitting (15) in shackle pin (14).
6.
Install screw (3) and new locknut (1) on shackle (4) and hanger (2).
7.
Lower vehicle until spring eye (11) aligns with holes in shackle (4).
8.
Install shackle pin (9) in shackle (4) and spring eye (11). Make sure pin slot (8) is positioned
downward to allow installation of screw (7).
9.
Install grease fitting (10) on shackle pin (9) and hanger (2).
10.
Tighten new screw (7) and install new locknut (6) on shackle (4).
11.
Remove jack stands .
3-446
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