15
6. Noisy check valve.
6. Replace.
Large quantities
of oil in air
supply
1. Worn piston rings.
2. Air intake clogged
3. Oil level in
compressor head to
high.
4. Wrong oil viscosity
1. Replace with new rings.
2. Clean air filter
3. Drain some of the oil.
4. Use 10W-30
Water in
discharge air.
1. Water increases with
humid weather.
1. Drain tank daily.
2. Add a filter to reduce the amount of
water in the air line.
Tank does not
hold pressure
when
compressors off
and shut off
valve is closed.
1. Worn check valve
2. Check all
connections and
fittings for leaks.
3. Check tank for
cracks or pin holes
1. Replace check valve
2. Tighten
3. Replace tank. Never repair a damaged
tank.
Excessive
vibration
1. Loose fasteners
2. Belt needs
replacement.
3. Belt alignment
1. Tighten
2. Replace with correct size.
3. Align engine and air compressor
pulleys.
Pressure switch
continuously
blows air out
the unloader
valve.
1. Malfunctioning check
valve
1. Replace the check valve if the unloader
valve bleeds off constantly.
NOTE:
Please refer to the engine owner’s manual for troubleshooting with the engine.
