TM 5-4320-300-14Table 5-1. Direct Support Troubleshooting-ContinuedMALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONStep 2. Check for damaged blower oil seals. Remove air cleaner mounting adaptor bolts. Remove air inlethousing bolts and carefully slide housing from beneath adaptor.NOTEThe gasket between air cleaner mounting adaptor and air inlet housing flange may stick when airinlet housing is removed.Start engine and inspect blower front and rear plates while the engine is operating. If oil is seen onthe plates radiating away from the oil seals, replace blower assembly (para 5-9).Step 3. Check for oil cooler core leaks.WARNINGHot coolant may be released when radiator cap is removed. Allow engine to cool before removingcap. Open cap part way to ensure that pressure in cooling system is released, then remove cap.Inspect engine coolant at radiator cap. If coolant contains oil, notify general support maintenance.6. PUMP DOES NOT DISCHARGE OR HAS LOW DISCHARGE PRESSUREStep 1. Check for broken impeller. Disassemble pump (para 5-21). Inspect impeller.Replace impeller if necessary.7. PUMP MAKES EXCESSIVE NOISEStep 1. Check for foreign matter in pump. Disassemble pump (para 5-21). Inspect for foreign matter.Remove foreign matter.5-5
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