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TM 9-2320-270-20-1
TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
58. EXCESSIVE AIR PRESSURE CONTINUED.
Step 3.
Open instrument panel (page 4-244). Using pressure gage of known accuracy,
check pressure gage (1) in truck. (TM 9-2320-270-10).
a.
If gage does not work, replace gage (4-1330).
If gage works, close instrument panel (page 4-244) and notify direct
b.
support maintenance.
59. SPRING BRAKES WILL NOT RELEASE.
Step 1.
Start engine and build air pressure to operational level (TM 9-2320-270-10).
Check parking brake valve for air pressure at valve. Shut down engine `
(TM 9-2320-270-10).
If there is no air pressure at parking brake valve, go to NO OR LOW AIR
PRESSURE (page 3-129).
Check parking brake hand valve (2) for leaks or damage. Listen for hissing or
Step 2.
use soap solution and watch for bubbles (page 4-1).
If valve is damaged or leaking, replace valve (4-806).
TA239721
3-134
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