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 900 of 1015

TM 9-2320-272-24-1

3-197. BRAKE PEDAL (TREADLE) VALVE REPLACEMENT

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL SETUP:

APPLICABLE MODELS

REFERENCES (TM)

All except M936/A1/A2

TM 9-2320-272-10

TOOLS

TM 9-2320-272-24P

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

MATERIALS/PARTS

Three locknuts (Appendix D, Item 288)

Antiseize tape (Appendix D, Item 72)

EQUIPMENT CONDITION

Air reservoirs drained (TM 9-2320-272-10).

Brake pedal removed (para. 3-196).

Protective control box removed (para. 3-115).

GENERAL SAFETY INSTRUCTIONS

Do not disconnect air lines before draining air

reservoirs.

Do not disconnect air lines before draining air reservoirs. Small

parts under pressure may shoot out with high velocity, causing

injury to personnel.

Tag air lines for installation.

1.

Disconnect two air lines (2) from brake pedal valve adapters (1).

2.

Disconnect air hoses (4) and (8) from adapters (7) and (9).

3.

Remove adapters (7) and (9) from tee (10).

4.

Disconnect air hose (6) from adapter (5).

5.

Remove adapter (5) from firewall (3).

6.

Remove tee (10) and pipe (11) from firewall (3).

3-536