Table 5-4. Troubleshooting - Continued
TROUBLE
PROBABLE CAUSE
REMEDY
9. COMPRESSOR OIL PRES-
1. Compressor oil level in crankcase
1. Add oil to compressor oil sump to full
SURE gauge indication too low
too low
mark on dipstick. If dipstick indicates
correct oil level, proceed to probable
cause 2.
2. Prime oil line for compressor
2. Prime air compressor oil pump
Refer
INSPECTION AND PREVENTIVE
MAINTENANCE (Section V) and prime
air compressor assembly oil
pump. If oil pump is primed, refer to
probable cause 3.
3. Viscosity of oil too low for operating
3. Change oil in compressor crankcase.
ambient temperature.
Refer to LUBRICATION INSTRUC-
TIONS (Section V) and Table 5-3
for ambient temperature. If oil is of
correct viscosity, refer to probable
cause 4.
4. Compressor oil pump defective pre-
4. Remove oil pump, disassemble, clean
venting proper circulation
inspect, and repair as necessary
If pump is not defective, refer to
probable cause 5.
5. Crankshaft oil seals worn causing -
5. Replace worn oil seals
Refer to
leak age resulting in probable
REPAIR(Section VI).lf oil seals
cause 1.
are not defective, refer to probable
cause 6.
6. Defective COMPRESSOR OIL
6. Replace a defective gauge
Refer to
PRESSURE gauge.
REPAIR (Section VI), If gauge is not
defective, refer to probable cause 7.
7. Oil pressure relief spring broken
7. Replace broken oil pressure relief
spring. Refer to REPAIR (Section VI).
10.
COMPRESSOR OIL PRES-
1. Defective COMPRESSOR OIL
1. Replace a defective gauge. Refer to
SURE gauge indicating too
PRESSURE gauge.
REPAIR (Section VI). If gauge is not
pressure
defective, refer to probable cause 2.
2. Compressor oil pressure relief ball
2. Remove and thoroughly clean oil pres-
stuck.
sure relief ball, spring, and oil passage.
Replace any damaged parts. Refer to
REPAIR (Section VI). If ball is not
stuck, refer to probable cause 3.
3. Oil pressure relief spring too long or
3. Replace oil pressure relief spring with
too stiff.
correct replacement spring. Refer to
REPAIR (Section VI).
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