Makita MAC5501G, Operating Instructions Manual

Page: 17 / 22

PROBLEM
System pressure leaking back Check and replace check
through check valve when valve if necessary
compressor is stopped.
Wrong oil being used
Drain and replace with proper
oil
Excessive Loose compressor, engine or Tighten components
vibration engine guard
Compressor not level
Level compressor
Leg bolts over tightened to Loosen leg bolts
floor
Excessive discharge pres-
Reduce operating pressure
sure
Wrong oil being used
Drain and replace with proper
oil
Loose flywheel, drive, pulley Tighten loose components and
or drive belts check belts
Worn connector rods, wrist Check and replace worn parts
pin or main bearings
Compressor Compressor valves loose or Check and replace worn or
Knocks broken broken valves
Check valve knocks at low Remove and clean check
pressure valve
Compressor Clogged inlet filter Clean inlet filter or replace as
uses too necessary
much oil Wrong oil being used, wrong Drain and replace oil
viscosity
Oil level too high
Fill compressor with oil to
proper level
Crankcase breather valve Replace crankcase breather
malfunction
Compressor runs unloaded
Increase load or stop compres-
too long sor when not needed. Check
for air leaks
Page 17
TROUBLE SHOOTING
POSSIBLE CAUSE CORRECTIVE ACTION