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MOTOR DOES NOT START AT LOW OPERATING POINT OR DOES NOT STOP AT HIGH OPERATING POINT - TM-5-4310-370-140050
COMPRESSOR PUMP OVERHEATING - TM-5-4310-370-140052

TM-5-4310-370-14 Compressor Unit Reciprocating Electric 5 CFM 175 PSI (4310-01-089-4330) Manual
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TM 5-4310-370-14
TABLE 5-1. DIRECT AND GENERAL SUPPORT TROUBLESHOOTING (Cont'd)
MALFUNCTION
TES T OR INSPECTION
CORRECTIVE ACTION
Step 3.
Inspect valve(s) for wear including gasket(s).
If valve(s) is worn, remove and replace.
6. LOW DISCHARGE PRESSURE
WARNING
Disconnect compressor unit from main power supply before performing check(s)
or inspection to avoid personal injury.
WARNING
Release pressure from air receiver and compressor pump before inspection,
performing procedures, or disassembly of equipment to avoid personal injury.
Step 1.
Check to see if valve(s) is leaking.
If valve(s) is leaking, remove and replace.
Step 2.
Check to see if piston rings are worn or defective.
If piston rings are worn or defective, remove and replace.
7. COMPRESSOR PUMP KNOCKING
WARNING
Disconnect compressor unit from main power supply before performing check(s)
or inspection, to avoid personal injury.
Step 1.
Check for worn connecting rod bearings.
If connecting rod bearings are worn, remove and replace
connecting rod assembly.
Step 2.
Check for worn piston pin bearing.
If piston pin bearing is worn, remove and replace con-
necting rod assembly.
Step 3.
Check for worn main bearings.
5-4






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