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 162 of 991

TM 9-2320-272-24-2

3-286. COMPANION SEAT CUSHION, BACKREST CUSHION, AND FRAME

REPLACEMENT

THIS TASK COVERS:

a. Removal

b. 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

MATERIALS/PARTS

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

Two cotter pins (Appendix D, Item 46)

Fourteen lockwashers (Appendix D, Item 400)

a. Removal

1.

Fold down backrest cushion frame (2).

2.

Remove eight screws (1), lockwashers (6), washers (5), and backrest cushion (3) from backrest

cushion frame (2). Discard lockwashers (6).

3.

Remove six screws (8), lockwashers (9), washers (10), and seat cushion (7) from battery box

cushion (4). Discard lockwashers (9).

4.

Remove two springs (13) from two battery box cover extensions (15) and backrest cushion frame (2).

5.

Remove two cotter pins (11), four washers (12), two pins (14), and backrest cushion frame (2) from

two battery box cover extensions (15). Discard cotter pins (11).

b. Installation

1.

Install backrest cushion frame (2) on battery box cover extensions (15) with two pins (14), four

washers (12), and two new cotter pins (11).

2.

Install two springs (13) on battery box cover extensions (15) and backrest cushion frame (2).

3.

Install seat cushion (7) on battery box cushion (4) with six washers (10), lockwashers (9), and screws (8).

4.

Install backrest cushion (3) on backrest cushion frame (2) with eight washers (5), new lockwashers (6),

and screws (1).

3-770