Makita MAC5501G Instruction Manual - Page 15

TROUBLE SHOOTING PROBLEM Will not start Low pressure Oil in Discharge Compressor Overheats Compressor loads & unloads or idols up & down excessively POSSIBLE CAUSE Safety valve leaks Drain cock open Loose tubes or fittings Dirty or plugged air filter Defective unloader valve Too much oil in the crankcase Improper oil viscosity Compressor overheated Restricted air filter Worn piston rings Dirty compressor head, cylinder or intercooler Clogged inlet filter Operating pressure too high Low oil or wrong oil being used Compressor cycle too long. Proper cycle is 50-60% on Stop/Start operation Pilot valve differential adjusted too close. Leaks in air system Worn or loose drive belts Defective compressor valves Compressor too small for intended use CORRECTIVE ACTION Please refer to Honda manual included Replace safety valve Close drain cock Tighten fittings Clean or replace as necessary Replace unloader valve Drain oil and fill to proper level Drain and replace oil Air pressure regulated too high Clean or replace air filter Replace piston rings Clean with compressed air Clean or replace as necessary Reduce operating pressure Drain and replace oil Allow for longer rest between Cycles Replace worn components as necessary Make necessary adjustments Check for leaks Tighten V-belts or replace Replace valves Upgrade to larger compressor Page 15