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 877 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

•

Valve located on drivers (left) side step rail, forward of the front rear axle housing.

•

Tag air lines for installation.

•

Mark fitting direction for installation.

1.

Loosen nut (Figure 1, Item 3) and remove secondary tank jumper air line (Figure 1, Item 2) from adapter

(Figure

1,

Item

4) on double check valve No. 7 (Figure 1, Item 5).

2.

Loosen nut (Figure 1, Item 7) and remove air line (Figure 1, Item 8) from elbow (Figure 1, Item 6) on double

check valve (Figure 1, Item 5).

3.

Remove elbow (Figure 1, Item 6) from double check valve Figure 1, Item (5).

4.

Remove double check valve (Figure 1, Item 5) and reducer (Figure 1, Item 1) from tee (Figure 1, Item 9) on

step support bracket (Figure

1,

Item

10).

5.

Remove adapter (Figure 1, Item 4) from double check valve (Figure 1, Item 5).

6.

If reducer (Figure 1, Item 1) comes out of tee (Figure 1, Item 9), remove reducer from double check valve

(Figure 1, Item 5).

TM 9-2320-272-23-3

0455

0455-2