TM  10-3930-638-24&P 12-9.   ENGINE   TROUBLESHOOTING   (cont) MALFUNCTION TEST  OR  INSPECTION CORRECTIVE ACTION 8. LOW ENGINE OIL PRESSURE Step 1. Check for engine oil leaks at engine oil filter and oil pan drain plug. a. If leaks are observed, tighten oil filter; replace oil pan drain plug gasket. b. If no leaks are observed, proceed to step 2 below. Step 2. Check engine oil for dirty condition. Remove dipstick wipe it between thumb and forefinger and note if oil feels gritty and looks dirty. a. If oil feels gritty and looks dirty, drain engine oil and replace engine oil filter (para 2-14c). (Refer to current lubrication order for correct weight oil.) b. If oil is okay, proceed to step 3 below. Step 3. Check if too light an engine oil is used. a. If engine oil is too light, drain engine oil and replace engine oil filter (para 2-14c). (Refer to current lubrication order for correct weight oil.) b. lf engine oil is not too light, proceed to step 4 below. Step 4. Check if oil pressure indicator light is illuminated when oil pressure gage indicates low oil pressure. a. If oil pressure indicator is illuminated, notify direct support maintenance. b. If oil pressure indicator is not illuminated, refer to gages troubleshooting (para 2-13). Step 5. Check if oil pressure gage indicates normal oil pressure when oil pressure indicator is illuminated. a. If oil pressure gage indicates normal oil pressure, troubleshoot electrical system (para 2-13). b. If oil pressure gage indicates low oil pressure, notify direct support maintenance. 9. ENGINE WILL NOT SHUT DOWN Place IGNITION switch in OFF position. Disconnect wire at fuel injection pump terminal. a. If engine stops, replace IGNITION switch. b. If engine does not stop, place fuel shutoff valve in OFF position and replace fuel injection pump (notify direct support maintenance) 2-22