ORGANIZATIONAL TROUBLESHOOTING - continued

TM 9-2320-269-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

AIR SYSTEM AND BRAKES - CONTINUED

BRAKES RESPOND SLOWLY OR NOT AT ALL - CONTINUED

Step 6. Test brake pedal valve (1) for delivery pressure.

a. Turn draincocks (2) open, let air drain, and turn draincocks (2) closed.

NOTE

Always use a pressure gage known to be accurate when testing. Do not rely on instrument panel gages.

b. Open left side hood panel (3) (page 2-7), and install in-line pressure gage between hose (4) and

valve outlet port (5).

c. Have assistant start engine (TM 9-2320-269-10), let air pressure build up, and shut off engine

(TM 9-2320-269-10).

d. Have assistant depress brake pedal (6), hold at several positions, then depress fully, and hold.

e. Gage reading should vary proportionately with pedal travel, and show full reservoir pressure,

105 psi (723.97 kPa), with pedal (6) depressed.

f. Have assistant release pedal (6), turn draincocks (2) open, let air drain, and turn draincocks (2)

closed.

g. Remove pressure gage, replace valve (1) (page 2-505) if not working properly, and close hood

Step 7. Check brake valves (7) for leakage.

a. Start engine (TM 9-2320-269-10), let air pressure build up, and shut off engine (TM 9-2320-269-

10).

b. Coat valves (7) with soap solution, and check for leakage.

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Index