TM-9-2320-260-20

TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)

TECHNICAL MANUAL; UNIT MAINTENANCE

APRIL 1995

TM-9-2320-260-20 - Page 665 of 1337

TM 9-2320-260-20

8-21. DOUBLECHECK VALVE REPLACEMENT

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL SETUP

APPLICABLE MODELS

EQUIPMENT CONDITION

All

●

Parking brake set (TM 9-2320-260-10).

MATERIALS/PARTS

●

Air reservoirs drained (TM 9-2320-260-10).

●

Transfer to front-rear axle propeller shaft removed

Locknut

(para. 7-2).

Antiseize tape (Appendix C, Item 30)

REFERENCES (TM)

GENERAL SAFETY INSTRUCTIONS

Do not disconnect air lines before draining air

TM 9-2320-260-10

reservoirs.

TM 9-2320-260-20P

WARNING

Do not disconnect air lines before draining air reservoir. Small

parts under pressure may shoot out with high velocity, causing

injury to personnel.

NOTE

●

M815, M818, and M819 vehicles are equipped with front and

rear doublecheck valves. This procedure covers only the rear

doublecheck valve.

●

Tag all air lines for installation.

1. Disconnect air lines (1) and (14) from elbows (2) and (13).

2. Disconnect air line (5) from adapter (4).

3. Remove locknut (11), screw (15), and check valve (12) from frame (10). Discard locknut (11).

NOTE

Note position of elbows for installation.

4. Remove adapter (4), elbows (13) and (2), connector (3), and nipple (16) from check valve (12).

5. Remove air lines (6) and (9) from tee (8).

6. Remove tee (8) from check valve (7).

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