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 824 of 1015

TM 9-2320-272-24-1

3-168. REAR AXLES SPRING SEAT WEAR PADS AND UPPER BRACKET MAINTENANCE

THIS TASK COVERS:

a. Removal

b. Inspection

c. Installation

INITIAL SETUP:

APPLICABLE MODELS

REFERENCES (TM)

All

TM 9-2320-272-10

Tools

TM 9-2320-272-24P

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

EQUIPMENT CONDITION

Torque wrench (Appendix E, Item 145)

Parking brake ret (TM 9-2320-272-10)

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

MATERIAL/PARTS

Four lockwashers (Appendix D, Item 363)

1.

2.

3.

4.

5.

6.

7.

8.

9.

Using hydraulic jack, raise vehicle at rear-rear axle differential housing (14) and place jack stands

under wheel hubs (5).

Remove two nuts (16), washers (15), U-bolt (6), and U-bolt bracket (9) from spring brake chamber (13).

Remove nut (10), lockwasher (11), two washers (2), screw (1), and spring brake chamber bracket (12)

from upper spring bracket (4). Discard lockwasher (11).

Remove two nuts (26), washers (25), U-bolt (21), and U-bolt bracket (22) from service brake

chamber (20).

Remove nut (23), lockwasher (24), two washers (18), screw (17), and service brake chamber

bracket (19) from upper spring bracket (4). Discard lockwasher (24).

Remove two nuts (8), lockwashers (7), and screws (3) from upper spring bracket (4). Discard

lockwashers (7).

Place hydraulic jack under spring seat (31) and raise leaf spring assembly (32) until upper spring

bracket (4) is clear of axle housing (28) and dowel pin (30).

Slide upper spring bracket (4) from bottom leaf (29) and remove from leaf spring assembly (32).

Remove spring seat wearpad (27) from upper spring bracket (4).

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