Makita MAC5501G Operating Instructions Manual page 16

PROBLEM
Insufficient
output, low
discharge
pressure
Engine stalls
Water in
crankcase
oil gets dirty,
rusty valves
or cylinders
Page 16
TROUBLE SHOOTING
POSSIBLE CAUSE
Clogged inlet filter
Leaks in air lines, air valves,
fittings, etc.
Drive belts slipping.
Drain valve left open
Defective pressure gauge
Leaking head gasket
Dirty or plugged inter cooler
tubes
Unloader pilot adjusted too
low, or defective
Worn or defective compressor
valves
Worn piston work out rings
Restrictive check valve
Compressor incorrectly sized
Faulty unloader / check valve
Low oil in engine
Compressor not level
Cycle too short; compressor
does not operate long enough
to vaporize condensed mois-
ture during compression
Compressor operating out-
side in cold conditions or inlet
filter not protected against
weather
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 valves
Replace worn parts
Clean check valve and replace
if necessary
Upgrade to larger compressor
Replace unloader check valve
Add oil to engine
Level compressor
Allow for longer operating
cycle
Provide adequate protec-
tion against extreme weather
conditions