TM-9-2320-272-23-3

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 3 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-3 - Page 855 of 1469

REAR AIR COUPLINGS INSTALLATION (M923/A1/A2)

NOTE

•

Fittings must be cleaned and inspected for cracks and stripped threads.

•

Apply sealant to all male pipe threads before installation.

1.

Install adapter (Figure 5, Item 4) and identification plate (Figure 5, Item 20) in frame rail (Figure 5, Item 5) with

lockwasher (Figure 5, Item 19) and nut (Figure 5, Item 18). Do not tighten nut.

NOTE

Perform Steps (2) and (3) for service coupling on left side of vehicle.

2.

Install pipe coupling (Figure 5, Item 17) on adapter (Figure 5, Item 4).

3.

Install elbow (Figure 5, Item 16) on pipe coupling (Figure 5, Item 17).

4.

Install valve (Figure 5, Item 12) and pipe nipple (Figure 5, Item 7) on elbow (Figure 5, Item 16).

5.

Install plate (Figure 5, Item 13) and bracket (Figure 5, Item 11) to frame rail (Figure 5, Item 5) with four screws

(Figure 5, Item 6), washers (Figure 5, Item 14), and locknuts (Figure 5, Item 15).

NOTE

Perform Step (6) for emergency coupling on right side of vehicle.

6.

Tighten nut (Figure 5, Item 18).

7.

Install pipe coupling (Figure 5, Item 3) on adapter (Figure 5, Item 4).

8.

Install elbow (Figure 5, Item 2) in pipe coupling (Figure 5, Item 3).

9.

Connect air line (Figure 5, Item 1) to elbow (Figure 5, Item 2).

10.

Install air coupling (Figure 5, Item 10) on pipe nipple (Figure 5, Item 7).

11.

Install dummy coupling (Figure 5, Item 9) and S-hook (Figure 5, Item 8) on air coupling (Figure 5, Item 10) and

bracket (Figure 5, Item 11).

TM 9-2320-272-23-3

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