TM 5-4310-379-145-5. General Support Troubleshooting Procedures. Table 5-1 lists the common malfunctions that may be foundduring operation. Refer to symptom index to locate the troubleshooting procedures for the malfunction. This manualcannot list all malfunctions that may occur, nor all test or inspections and corrective actions. If a malfunction is notcorrected by listed corrective actions, notify your supervisor.SYMPTOM INDEXSymptomPage1.Low compressor oil pressure.................................................................................................................... 5-22.Low compressor output pressure.............................................................................................................. 5-23.Compressor knocking.............................................................................................................................. 5-34.Compressor oil in discharge air................................................................................................................ 5-3Table 5-1. General Support Troubleshooting Procedures.MalfunctionTest or InspectionCorrective Action1LOW COMPRESSOR OIL PRESSURE.Step 1.Check oil pump.Replace a defective oil pump (para. 5-35).Step 2.Check intercoolerReplace a damaged intercooler (para. 5-27).Step 3.Check oil screen.Clean oil screen with solvent and dry with compressed air.2.LOW COMPRESSOR OUTPUT PRESSURE.Step 1.Check intake valves.Replace or repair defective valves (para. 5-30).Step 2.Check discharge valves.Replace or repair defective valves (para. 5-30).Step 3.Check unloader valves.Replace or repair defective valves (para. 5-28).Step 4.Check cylinder head gasket for leaks.Replace cylinder head (para. 5-29)5-2Change 1
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