TM 9-2320-269-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AIR SYSTEM AND BRAKES - CONTINUED
QUICK AIR PRESSURE LOSS - CONTINUED
Step 6. Check brake valves (1) for leakage.
a. Start engine (TM 9-2320-269-10), let air pressure build up, and shut off engine.
b. Coat valves (1) with soap solution, and check for leakage.
c.
If soap bubble larger than 1-inch (2.54-cm) forms in less than 3 seconds at exhaust
port (2), replace as needed using applicable maintenance procedure.
d. Have assistant apply brakes, and hold.
e. Coat valves (1) with soap solution, and check for leakage.
f.
If soap bubble larger than 1-inch (2.54-cm) forms in less than 2 seconds at exhaust
port (2), replace as needed using applicable maintenance procedure.
g. If soap bubbles form at any other part of valve (1), tighten or replace as needed using
applicable maintenance procedure, or notify Direct Support Maintenance.
h. Release brakes.
Step 7. Test air compressor governor (3) for leakage.
a. Open left side hood panel (page 2-7), and coat inlet valve port (4) and exhaust port (5)
with soap solution.
b. Start engine (TM 9-2320-269-10), check ports (4) and (5) and fittings (6) for bubbles,
and shut off engine.
c.
If leakage is found, tighten lines (7) using 9/16-inch and 3/4-inch wrenches, or replace
governor (3), or notify Direct Support Maintenance.
Step 8. Test air compressor (8) for leakage.
a. Coat compressor head gasket (9) with soap solution.
b. Start engine (TM 9-2320-269-10), and let air pressure build up.
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