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 989 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 protection valve control line (Figure 2, Item 10) and trailer handbrake control line (Figure 2, Item 7)

to double check valve No. 2 (Figure 2, Item 3).

3.

Connect double check valve No. 5 control line (Figure 2, Item 8) to adapter tee (Figure 2, Item 9).

4.

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

TM 9-2320-272-23-3

0475

0475-4