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 872 of 1015

TM 9-2320-272-2-1

3-l83. FRONT BRAKE SPIDER 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 CONDITON

Torque wrench (Appendix E, Item 144)

Brakeshoes removed (para. 3-180).

MATERIALS/PARTS

Service brake chamber removed (para. 3-181).

Two

lockwashers (Appendix D, Item 365)

Gasket sealant (Appendix C, Item 30)

1.

Remove nine nuts (6), washers (6), brake spider slinger (4), and brake spider (2) from studs (12).

2.

Remove two nuts (10), lockwashers (9), screws (7), and clips (8) from brake spider (2). Discard

lockwashers (9).

1.

Install two clips (8) on brake spider (2) with two screws (7), new lockwashers (9), and nuts (10).

2.

Apply gasket sealant to spindle (11) and brake spider (2) mating surfaces.

Failure to tighten nuts in proper sequence can crack brake spider.

Tighten front brake spider after installing front wheel dustcovers.

3.

Install brake spider (2) and brake spider slinger (4) on studs (12) with anchor plunger (3) at

1 o’clock position (left side) and anchor plunger (1) at 11 o’clock position (right side) with nine

washers (5) and nuts (6). Tighten nuts (6) 110-145 lb-ft (149-196 N•m) in sequence shown.

3-508