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 983 of 1469

INSTALLATION

NOTE

•

If new double check valve is being installed, use fittings from old check valve.

•

Wrap all male pipe threads with antiseize tape before installation.

1.

Position double check valve No. 2 (Figure 2, Item 3) against left frame rail (Figure 2, Item 4) and install with

screw (Figure 2, Item 1) and locknut (Figure 2, Item 2).

2.

Connect treadle valve control line (Figure 2, Item 7) to double check valve No. 2 (Figure 2, Item 3).

3.

Connect secondary relay valve control line (Figure 2, Item 9) to elbow (Figure 2, Item 8).

4.

Connect double check valve No. 1 output line (Figure 2, Item 10) to elbow (Figure 2, Item 11).

5.

Connect primary relay valve control line (Figure 2, Item 13) to valve adapter tee (Figure 2, Item 12).

6.

Connect two wires (Figure 2, Item 6) to stoplight switch (Figure 2, Item 5).

TM 9-2320-272-23-3

0474

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