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 878 of 1015

TM 9-2320-272-24-1

3-186. AIR RESERVOIR ONE-WAY CHECK VALVE REPLACEMENT

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL

SETUP:

APPLICABLE MODELS

All

TOOLS

EQUIPMENT CONDITION

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

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

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

GENERAL SAFETY INSTRUCTIONS

MATERlALS/PARTS

Do not disconnect air lines before draining air

reservoirs.

Antiseize tape (Appendix C, Item 72)

REFERENCES (TM)

TM 9-2320-272-10

TM 9-2320-272-24P

Do not disconnect air lines before draining air reservoirs. Small

parts under pressure may shoot out with high velocity, causing

injury to personnel.

There is a one-way check valve mounted at inlet side of each

reservoir. All three check valves are replaced basically the same.

This procedure covers the spring brake one-way check.

1.

Disconnect air line (1) from check valve adapter (2).

2.

Remove check valve adapter (2) from check valve (3).

3.

Remove check valve (3) from tee (4).

Wrap all male pipe threads with antiseize tape before installation.

1.

Install check valve (3) on tee (4).

2.

Install check valve adapter (2) on check valve (3).

3.

Connect air line (1) to check valve adapter (2).

3-514