Trouble Isolation Procedure Remedy Oil line leakage  Check external lines for evidence of oil leakage.  Replace or repair defective lines. Accessory seal leakage  Check for leak at accessories immediately after Replace accessory and/or defective  engine operation.  accessory oil seal. Low grade of oil  Fill tank with proper grade oil. Failing or failed bearing  Check sump and oil pressure pump screen for  Replace engine if metal particles are found.  material particles. Defective pressure gauge  Check indicator.  Replace indicator if defective. Improper operation of oil Erratic pressure indications either excessively Remove, clean, and inspect relief valve pressure  high or low.  accessory oil seal. Inadequate oil supply  Check oil quantity.  Fill oil tank. Diluted or contaminated oil  Drain engine and tank; refill tank.  Clogged oil screen  Remove and clean oil screen. Oil viscosity incorrect  Make sure correct oil is being used.  Drain engine and tank; refill tank. Oil pump pressure relief  Check pressure relief valve adjustment.  Make correct adjustment on oil pump  valve adjustment incorrect  pressure relief valve. Defective temperature gauge  Check indicator.  Replace indicator if defective. Inadequate oil supply  Check oil quantity.  Fill oil tank. Diluted or contaminated oil  Drain engine and tank; refill tank. Obstruction in oil tank  Check tank.  Drain oil and remove obstruction. Clogged oil screen  Remove and clean oil screens. Obstruction in oil cooler Check cooler for blocked or deformed passages.  Replace oil cooler if defective. passages Diluted or contaminated oil  Drain engine and tank; refill tank. Oil level in tank too high  Check oil quantity.  Drain excess oil from tank. Excessive oil consumption 1 High or low indicated oil pressure 2 High or low indicated oil temperature 3 Oil foaming 4 Figure 6-30.  Oil system troubleshooting procedures.  4.  Bulk stability—resistance to physical or chemical  change resulting from oxidation. Permits long periods  of serve operation without significant increase in  viscosity or total acidity, the main indicators of  oxidation. 5.  Compatibility—most turbine oil is compatible with  other oils that meet the same military specification.  But, most engine manufacturers do not recommend  the indiscriminate mixing of approved oil brands and  this is not a generally accepted practice.  6.  Seal Wear—essential for the life of engines with  carbon seals that lubricant properties prevent wear of  the carbon at the carbon seal face. Turbine Oil Health and Safety Precautions  Under normal conditions, the use of turbine oil presents a  low health risk for humans. Although each person reacts  somewhat differently to exposure, contact with liquids,  vapors, and mist of turbine oil should be minimized.  Information on established limits on exposure to turbine  oil can generally be found in the material safety data  sheets (MSDS). Prolonged breathing of hydrocarbon vapor  concentrations in excess of the prescribed limits may result  in lightheadedness, dizziness, and nausea. If turbine oil is  ingested, call a doctor immediately; identify the product and  how much was ingested. Because of the risk of ingestion,  petroleum products should never be siphoned by mouth. 6-20