TM9-2815-226-34-1 - JATONKAM35s HOME ON THE WEB

TM 9-2815-226-34-1Table 2-1. TROUBLESHOOTING PROCEDURES (Cont)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION25. HIGH OIL PRESSURE AT RATED ENGINE RPM (HIGHER THAN 45 PSI, [311 KPA]).Step 1.Check that proper oil viscosity is being used.Drain and service oil system (LO 9-2320-281-12).Step 2.Check for stuck closed pressure regulator plunger.26. NO OIL PRESSURE.Remove pump and replace regulator (para 3-51).Step 1.Check for broken oil pump drive shaft or gear turning on shaft.Replace defective pump (para 3-6) and repair as necessary (para. 3-51).Step 2.Check for defective (stuck open) or weak spring in pump pressure regulator.Remove pump and replace regulator (para 3-51).27. EXCESSIVE CRANKCASE PRESSURE.Step 1.Check for worn or scored liners or pistons.Replace defective liners or pistons (para 3-6).Step 2.Check for broken or worn piston rings.Replace defective rings (para 3-6).2-24