Makita MAC3001 Manuel D'instructions page 13

PROBLEM
Insufficient
output, low
discharge
pressure
Motor stalls
Compressor
knocks
Piston rings not
seated
TROUBLESHOOTING GUIDE
POSSIBLE CAUSE
Clogged inlet filter
Leaks in air lines, air
valves, fittings, etc...
Drive belts slipping
Drain valve left open
Defective pressure gauge
Compressor incorrectly
sized
Leaking head gasket
Dirty or plugged inter
cooler tubes
Unloader pilot or pressure
switch adjustment too low,
or defective
Worn or defective
compressor valves
Worn piston, worn out
rings
Restrictive check valve
Faulty unloader/check
valve
Valves incorrectly installed
Drive belts too tight
Compressor valves loose
or broken
Inspect check valve, it may
knock at low pressures
Compressor not run long
enough to seat rings
Wrong oil being used,
wrong viscosity
CORRECTIVE ACTION
Clean or replace as
necessary
Replace worn
components as
necessary
Tension V-belts
Close drain valve
Replace pressure gauge
Replace head gasket
Remove and clean inter
cooler tubes
Make necessary
adjustments
Replace worn parts
Replace worn parts
Clean check valve and
replace if necessary
Replace unloader or
check valve
Install valves correctly
Tension V-belts
Check and replace worn
or broken valves
Remove and clean check
valve
Allow 100 hours of
normal operation for new
rings to seat
Drain and replace with
proper oil
13