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 672 of 991

TM 9-2320-272-24-2

3-467. PRESSURE SWITCH REPLACEMENT

INITIAL SETUP:

THIS TASK COVERS:

a. Removal

b. Installation

APPLICABLE MODELS

M939A2

TOOLS

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

MATERIALS/PARTS

Tiedown straps (Appendix D, Item 690)

Antiseize tape (Appendix C, Item 72)

REFERENCES (TM)

TM 9-2320-272-10

TM 9-2320-272-24P

EQUIPMENT CONDITION

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

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

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

GENERAL SAFETY INSTRUCTIONS

Eyeshields must be worn when releasing

compressed air.

Air reservoirs must be drained before removing air

system components.

a. Removal

WARNING

Release all air pressure before loosening or removing air system

component(s).

Eyeshields must be worn when releasing compressed air.

Failure to do so may result in injury to personnel.

1.

Remove tiedown straps (3) from pressure switch lead (4). Discard tiedown straps (3).

2.

Disconnect pressure switch (2) from wiring harness (1).

3.

Remove pressure switch lead (4) from elbow (5).

b. Installation

NOTE

Wrap male threads with antiseize tape before installation.

1.

Install pressure switch lead (4) on elbow (5).

2.

Connect pressure switch (2) to wiring harness (1).

3.

Install new tiedown straps (3) on pressure switch lead (4).

3-1280