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Operating Instructions
Husky Stationary
Air Compressors
Troubleshooting Chart
Symptom
Low discharge pressure
Pump overheating causes
air filter to melt
Excessive noise
(knocking)
Large quanity of oil in the
discharge air
NOTE: In an oil
lubricated compressor
there will always be a
small amount of oil in the
air stream.
Possible Cause(s)
1. Air demand exceeds pump
capacity
2. Air leaks
3. Restricted air intake
4. Blown gaskets
5. Leaking or damaged valves
1. Insulating gasket between
filter and head is missing
2. Broken valves/blown gas-
ket
1. Loose motor or compressor
pulley
2. Lack of oil in crankcase
3. Worn connecting rod
4. Worn piston pin bores
5. Piston hitting the valve
plate
6. Noisy check valve in
compressor system
1. Worn piston rings
2. Compressor air intake
restricted
3. Excessive oil in compressor
4. Wrong oil viscosity
Corrective Action
1. Reduce air demand or use a compressor with more capacity.
2. Listen for 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 the air filter element.
4. Replace any gaskets proven faulty on inspection.
5. Remove head and inspect for valve breakage, misaligned
valves, damaged valve seats, etc. Replace defective parts and
reassemble.
Install a new head gasket each time the
CAUTION
!
head is removed
1. Install gasket.
2. Replace valves or install new gasket.
1. Loose motor or compressor pulleys are a very common cause
of compressors knocking. Tighten pulley clamp bolts and set-
screws.
2. Check for proper oil level; if low, check for possible damage
to bearings. Dirty oil can cause excessive wear.
3. Replace connecting rod. Maintain oil level and change oil
more frequently.
4. Remove piston assemblies from the compressor and inspect
for excess wear. Replace excessively worn piston pin or pis-
tons, as required. Maintain oil level and change oil more
frequently.
5. Remove the compressor head and valve plate and inspect for
carbon deposits or other foreign matter on top of piston.
Replace head and valve plate using new gasket. See
Lubrication section for recommended oil.
6. Replace.
Do not disassemble check valve with
DANGER
!
air pressure in tank
1. Replace with new rings. Maintain oil level and change oil
more frequently.
2. Clean filter. Check for other restrictions in the intake system.
3. Drain down to full level.
4. Use Mobil 1
®
10W-30
6
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