TM 5-3895-374-24-1 TROUBLESHOOTING CHART NOTE: TROUBLESHOOTING PROBLEMS MAY HAVE SIMILAR CAUSES AND SOLUTIONS. Problem Probable cause Solution Excessive Current 1 Low voltage/motor 1 Check that power supply is adequate and that Draw Trips Circuit overload compressor is on dedicated circuit See page 7 Breaker 2 Drive belt too tight 2 Readjust belt tension (see page 14) 3 Restricted air passages 3 Inspect and replace transfer tubes or check valve, as required Compressor Stalls 1. Low voltage to motor 1. Furnish adequate power See page 7 2. Bad check valve 2. Replace the check valve 3. Seized pump 3. Contact authorized service center Low Discharge 1. Air leaks 1. Tighten or replace leaking fittings or connections Pressure Do not overtighten 2. Leaking valves 2.. Contact authorized service center 3. Restricted air intake 3. Clean or replace the air filter element(s) 4 Blown gaskets 4 Contact authorized service center 5 Worn piston rings or 5 Contact authorized service center Compressor Pump 1. Loose motor pulley or 1. Retighten pulley and flywheel Check alignment Knocking compressor flywheel See page 1.4 cylinder 2. Low oil level In pump 2. Keep oil level full at all times See page 1.2. crankcase 3. Excess carbon on valves 3. Contact authorized service center on top of piston Excessive Oil In 1. Worn piston rings or 1.  Contact authorized service center Discharge Air cylinder (a small amount of oil Is normal) 2. Restricted air intake 2. Clean or replace the air filter element(s) 3. Oil level too high 3. Reduce to proper level Use premium compressor oil (see page 1.2.) Overheating 1. Poor ventilation 1. Relocate compressor to an area with cool, dry and well-circulated air, at least 1.2. In from nearest wall 2. Dirty cooling surfaces 2. Clean all cooling surfaces thoroughly 200-2009 (page 3-639)