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CHAPTER
CHAPTER
CHAPTER
CHAPTER 8.TROUBLESHOOTING
8.TROUBLESHOOTING
8.TROUBLESHOOTING
8.TROUBLESHOOTING
Symptom
Probable cause
Corrective Action
Low
discharge
pressure
1.
Air
demand
exceeds
pump
capacity.
2.
Leaking air
3.
Restricted air intake
4.
Blown gaskets
5.
Leaking or damaged valves
1.
Decrease air demand or use a larger
capacity air compressor
2.
Listen for high pitched escaping air.
Apply soap solution to all fittings and
connections. Bubbles will appear at
points of leakage. Tighten or replace
leaking fittings or connections.
3.
Clean air filter element.
4.
Replace faulty gaskets.
5.
Remove head and inspect for valve
breakage,
misaligned
valves,
damaged valve seats, etc. Replace
defective parts and reassemble.
Pump
overheating
and
damaging
air
filter.
1.
Insulating gasket between filter
and head is missing.
2.
Brolen valves blown gasket.
1.
Install gasket.
2.
Replace valves or install new gaskets.
Excessive
noise
or
abnormal
noise
1.
Loose motor or losse pulley.
2.
Low oil in crankcase
3.
Worn connecting rods
4.
Worn piston pin
5.
Piston hitting valve plate
6.
Noisy check valve.
1.
Tighten engine mount bolts and
pulley setscrews.
2.
Refill oil to the proper level. Also, if
always
low,
check
for
possible
damage to bearings or oil leaks.
3.
Replace connecting rod. Maintain oil
level and change oil more frequently.
4.
Remove old piston pin, measure abd
verify specifications are within limits.
If not, replace piston pin and replace
oil more frequently.
5.
Remove the compressor head and
valve plate for carbon deposits or
other foreign objects. Replace the
head and valve plate and use a new
gasket.
6.
Replace.
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