DOUBLE CHECK VALVES -706880553

TM 5-4210-233-14&P-1

4-149. DOUBLE CHECK VALVES

THIS TASK COVERS:

Removal

Follow-on Maintenance

Installation

TOOLS REQUIRED

EQUIPMENT CONDITION

Tool Kit, General Mechanics, Automotive

Main Engine Shutdown (see para 2-12 .)

(Appendix B, Section lll, Item 1)

Batteries Disconnected (see para 4-114 .)

All Air tanks Drained (see para 4-157 .)

a. Removal.

NOTE

One double check valve (DC-4) is mounted on the center of the

first crossmember ahead of the front rear tandem. One double-

check valve (DC-4) is located on the relay valve (R-12) between

the axles on the left-hand side of the truck.

NOTE

Refer to locator view in para 4-147 and air schematics in

Appendix G for additional information.

(1) Block vehicle wheels or hold by means other than vehicle service brakes.

(2) Tag and disconnect air lines. Remove mounting bolt and remove the double check valve.

b. Installation.

(1) Install double check valve with mounting bolt.

(2) Connect air lines to double check valve.

Follow-on Maintenance.

(1) Connect batteries (see para 4-114).

(2) Check for air leaks (see para 4-147).

4-424