Makita MAC5500G operating instructions Trouble Shooting

TROUBLE SHOOTING

PROBLEM	POSSIBLE CAUSE	CORRECTIVE ACTION
	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.

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