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 981 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. 5 is located inside the left frame rail in back of the stoplight switch.

•

Tag air lines for installation.

1.

Disconnect two wires (Figure 1, Item 6) from stoplight switch (Figure 1, Item 5).

2.

Disconnect treadle valve control line (Figure 1, Item 7) from double check valve No.2 (Figure 1, Item 3).

3.

Disconnect secondary relay valve control line (Figure 1, Item 9) from elbow (Figure 1, Item 8).

4.

Disconnect double check valve No. 1 output line (Figure 1, Item 10) from elbow (Figure 1, Item 11).

5.

Disconnect primary relay valve control line (Figure 1, Item 13) from valve adapter tee (Figure 1, Item 12).

6.

Remove locknut (Figure 1, Item 2), screw (Figure 1, Item 1), and double check valve No. 2 (Figure 1, Item 3)

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

TM 9-2320-272-23-3

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