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 664 of 1015

TM 9-2320-272-24-1

3-111. STOPLIGHT SWITCH REPLACEMENT

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL SETUP:

APPLICABLE MODELS

All

REFERENCES (TM)

TM 9-2320-272-10

TOOLS

TM 9-2320-272-24P

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

EQUIPMENT CONDITION

MATERIALS/PARTS

l

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

Antiseize tape (Appendix C, Item 72)

l

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

l

Battery ground cables disconnected (para. 3-126).

Tag wires for installation.

1.

Disconnect two wires (1) from stoplight switch (2).

2.

Remove stoplight switch (2) from double check valve (3).

NOTE

Male pipe threads must be wrapped with antiseize tape before

installation.

1.

Install stoplight switch (2) on double check valve (3).

2.

Connect two wires (1) to stoplight switch (2).

FOLLOW-ON TASKS: •

Connect battery ground cables (para. 3-126).

l

Start engine (TM 9-2320-272-10) and allow air pressure to build up to normal

operating range. Check for air leaks at switch.

l

Check stoplights for proper operation (TM 9-2320-272-10).

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