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 873 of 1469

REMOVAL

WARNING

Do not disconnect air lines or hoses before draining air reservoirs. Small parts under pressure

may shoot out with high velocity. Failure to comply may result in injury or death to personnel.

NOTE

•

Double check valve No. 6 is located inside the left frame rail and rearward of the front

axle differential.

•

Tag air lines for installation.

1.

Loosen nut (Figure 1, Item 7) and remove primary delivery air line (Figure 1, Item 8) from adapter

(Figure

1,

Item 9) on double check valve No. 6 (Figure 1, Item 5).

2.

Loosen nut (Figure 1, Item 15) and remove inversion valve air line (Figure 1, Item 16) from tee fitting

(Figure

1, Item 12) on double check valve (Figure 1, Item 5).

3.

Loosen nut (Figure 1, Item 13) and remove air line (Figure 1, Item 14) from tee fitting (Figure 1, Item 12) on

double check valve (Figure 1, Item 5).

4.

Loosen nut (Figure 1, Item 2) and remove service air line (Figure 1, Item 1) from elbow (Figure 1, Item 3) on

double check valve (Figure 1, Item 5).

5.

Remove locknut (Figure 1, Item 10), screw (Figure 1, Item 6), and double check valve (Figure 1, Item 5) from

frame rail (Figure 1, Item 4). Discard locknut.

6.

Remove elbow (Figure 1, Item 11) with tee fitting (Figure 1, Item 12) from double check valve

(Figure

1,

Item

5).

7.

Remove tee fitting (Figure 1, Item 12) from elbow (Figure 1, Item 11).

8.

Remove elbow (Figure 1, Item 3) from double check valve (Figure 1, Item 5).

9.

Remove adapter (Figure 1, Item 9) from double check valve (Figure 1, Item 5).

TM 9-2320-272-23-3

0454

0454-2