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TM 5-4210-220-12
Table 4-2 UNIT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8a
AIR COMPRESSOR FAILS TO MAINTAIN PRESSURE OR ADEQUATE AIR SUPPLY
Step 1
Check engine air cleaner gage in cab
Replace engine air cleaner if blocked, (see para. 4-23)
Step 2
Check hose between engine and compressor is not kinked or leaking
Replace hose, (see para. 4-9)
Step 3
Check for excessive system leakage
Replace broken hose, leaking air tank etc, or close air drain valve
Step 4
Check governor/governor setting
Adjust or repair governor as required, (see para. 4-22)
8b
AIR COMPRESSOR NOISY
Step 1
Check for restriction in discharge line to air drier
a
Replace hose, (see para. 4-9)
b
Remove restriction
Step 2
Check oil flow to compressor
Replace hose or fittings, (see para. 4-28)
Step 3
Compressor bearings worn or excessive wear in compressor
Repair compressor, (see para. 4-28)
8c
AIR RESERVOIRS AT 110 PSI (760 kPa) OR GREATER
Step 1
Check for restriction or leak in control hose between air drier and governor
Replace hose or fittings, (see para. 4-9)
Step 2
Check governor/governor setting
Adjust or repair governor as required, (see para. 4-22)
Step 3
Compressor unloader pins or seals sticking
Repair compressor, (see para. 4-22)
4-37
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