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 954 of 1015

TM 9-2320-272-24-1

3-208. AIR COUPLINGS REPLACEMENT (Contd)

d. Front Air Couplings Installation

NOTE

l

Fittings must be cleaned and inspected for cracks and stripped

threads.

l

Wrap all male pipe threads with antiseize tape before

installation.

l

Perform step 1 for emergency coupling on left side of vehicle.

1.

Install elbow (3) in valve (13).

NOTE

Perform step 2 for service coupling on right side of vehicle.

2.

Install elbow (3) in air coupling (2) and place air coupling (2) in soft-jawed vise.

3.

Install adapter (4) in elbow (3) and remove air coupling (2) from vise.

4.

Install identification plate (6), bracket (5), and adapter (4) in frame rail (7) with new lockwasher (8) and

nut (9).

5.

Install elbow (10) on adapter (4).

6.

Connect air line (11) to elbow (10).

NOTE

Perform steps 7 and 8 for emergency coupling on left side of

vehicle.

7.

Install pipe nipple (14) in valve (13).

8.

Install air coupling (2) on pipe nipple (14).

9.

Install dummy couplings (15) and (1) and S-hook (12) on air coupling (2) and bracket (5).

3-590