TM 9-2330-381-14
Table 3-1. Operator/Crew Troubleshooting Table - CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HYDRAULIC SYSTEM - CONT
13.
EXCESSIVE PUMP NOISE OR PUMP FAILURE
Step 1.
Check that hydraulic tank shut-off valve is OPEN (para. 2-4).
CAUTION
If APU has run longer than 30 seconds, with the hydraulic tank shut-off valve
closed, pump may be damaged and the hydraulic system, including filters, may be
contaminated with metal particles.
If valve is closed, shut down APU (para. 2-16) and notify unit maintenance.
Step 2.
Check for general hydraulic failures.
Refer to symptom 10 for general hydraulic failures.
Step 3.
Check for external leaks at hydraulic fittings/joints.
Refer to symptom 11 to continue checking for external leaks.
14.
PLATFORM SUSPENSION WILL NOT ADJUST OR ADJUSTMENTS ARE SLUGGISH
Step 1.
Check for general hydraulic failures.
Refer to symptom 10 for general hydraulic failures.
Step 2.
Check that all suspension isolation valves (para. 2-6) are in OPEN position.
Position isolation valves in open position, handles pushed inboard and facing toward front of
semitrailer.
Step 3.
Check that suspension shut-off and gooseneck isolation valves (para. 2-6) are in correct position.
a. If coupled to a tractor, suspension shut-off and gooseneck isolation valve handles should be in
RUN position, both handles pushed inward. The suspension shut-off valve must be pulled out to
make platform adjustments.
b. If uncoupled from a tractor, suspension shut-off valve handle and gooseneck isolation valve
handle should be in ADJUST position, both handles pulled outward.
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