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 950 of 1015

TM 9-2320-272-24-1

3-208. AIR COUPLINGS REPLACEMENT (Contd)

b. Rear Air Couplings Removal (M923/A1/A2)

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

Remove dummy coupling (9) and S-hook (8) from air coupling (10) and bracket (11).

Remove air coupling (10) and pipe nipple (7) from valve (12).

Disconnect air line (1) from elbow (2).

Remove elbow (2) from pipe coupling (3).

Remove pipe coupling (3) from adapter (4).

Remove four locknuts (15). washers (14), screws (6), bracket (11), and plate (13) from frame rail (5).

Discard locknuts (15).

NOTE

Perform step 7 for emergency coupling on right side of vehicle.

Loosen nut (18) from adapter (4).

Remove valve (12) from elbow (16).

NOTE

Perform step 9 for service coupling on left side of vehicle.

Remove elbow (16) and pipe coupling (17) from adapter (4).

Remove elbow (16) from adapter (4).

Remove nut (18), lockwasher (19), identification plate (20), and adapter (4) from frame rail (5).

Discard lockwasher (19).

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