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 812 of 1015

TM 9-2320-272-24-1

3-163. FRONT SPRING BUSHING MAINTENANCE

THIS TASK COVERS:

a. Inspection

b. Removal

c. Installation

INITIAL SETUP:

APPLICABLE MODELS

All

TOOLS

General mechanic’s tool kit (Appendix E, Item 1)

MATERIALS/PARTS

Locknut (Appendix D, Item 285)

Bushing (Appendix D, Item 22)

Pin (Appendix D, Item 514)

REFERENCES (TM)

LO 9-2320-272-12

TM 9-2320-272-10

TM 9-2320-272-24P

EQUIPMENT CONDITION

Parking brake set (TM 9-2320-272-10).

Front wheels removed (para. 3-220 or 3-221).

1.

Insert prybar between spring hanger (1) and front spring shackle (3).

2.

Press down on front spring shackle (3). If movement is evident between front spring shackle (3) and

pin (2), perform task b.

1.

Raise frame (4) to remove load from spring (12) and support with jack stands.

2.

Remove locknut (7) and screw (8) from shackle (5). Discard locknut (7).

3.

Remove grease fitting (11) from pin (10).

4.

Remove pin (10) from shackle (5) and spring eye (13). Discard pin (10).

5.

Remove spring (12) from shackle (5).

6.

Remove bushing (6) from shackle (5). Discard bushing (6).

1.

Install new bushing (6) on shackle (5).

2.

Lower frame (4) until spring eye (13) is aligned with holes in shackle (5).

3.

Install new pin (10) in shackle (5) and spring eye (13). Make sure pin slot (9) is positioned

downward to allow installation of screw (8).

4.

Install grease fitting (11) in pin (10).

5.

Install screw (8) and new locknut (7) in shackle (5).

3-448