11
1
trouble shooting
problem
possible Cause
CorreCtiVe aCtion
Excessive
vibration /
compressor
knocks
Loose compressor, motor or
engine guard.
Compressor not level.
Tighten components.
Level compressor
Feet bolts over tightened to
floor.
Loosen feet bolts.
Excessive discharge pres-
sure.
Reduce operating pressure.
Wrong oil being used.
Drain and replace with proper
oil.
Loose flywheel, drive, pulley
or drive belts.
Tighten loose components and
check belts.
Worn connector rods, wrist
pin or main bearings.
Check and replace worn parts.
Compressor valves loose or
broken.
Check and replace worn or
broken valves..
Check valve knocks at low
pressure.
Remove and clean check
valve.
Compressor
uses too
much oil
Clogged inlet filter.
Clean inlet filter or replace as
necessary.
Wrong oil being used, wrong
viscosity.
Drain and replace oil.
Oil level too high.
Fill compressor with oil to
proper level.
Crankcase breather valve
malfunction.
Replace crankcase breather.
Compressor runs unloaded
too long
Increase load or stop compres-
sor when not needed. Check
for air leaks.
Compressor operating out-
side in cold conditions or inlet
filter not protected against
weather.
Provide adequate protec-
tion against extreme weather
conditions.
Worn piston rings.
Replace piston rings.
Piston rings not seated.
See instructions on page 14.
