ARMY TM 9-6115-464-12AIR FORCE TO 35C2-3-445-1NAVY NAVFAC P-8-624-12Table 3-1. Operator Troubleshooting - ContinuedMALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION7. ENGINE KNOCKS.Step 1.Step 2.Step 3.Engine overheated.Refer to malfunction 11 of this table.Low lube oil level.Check oil level. Add oil if necessary (Lubrication order, para 3-2).Improper grade of fuel or water in fuel.Drain main fuel tank (para 3-45), fuel filters (para 3-39, 3-41) and day tank (para 3-21).Service with clean fuel (para 3-45).8. BLACK SMOKE IN EXHAUST.Step 1.Step 2.Step 3.Improper grade of fuel.Drain main fuel tank (para 3-45), fuel filters (para 3-39, 3-41) and day tank (para 3-21).Service with clean fuel (para 3-45).Dirty air cleanerNotify higher level of maintenance.Generator set overloaded.Reduce load to rated level.9. BLUE OR WHITE SMOKE IN EXHAUSTImproper grade of fuel.Drain main fuel tank (para 3-45),10. LOW OIL PRESSURE.fuel filters (para 3-39, 3-41) and day tank (para 3-21).Low oil level.Add oil to proper level on dipstick (para 3-2).Improper viscosity of oil.Drain crankcase and refill with oil of proper viscosity (Lubrication Order para 3-2).Step 1.Step 2.3-14
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