TM-9-2815-220-24 Maintenance Manual for AVDS-1790-2CA AVDS-1790-DA and AVDS-1790-2DR Engines Download
Page 135 of 1563
TM 9-2815-220-24 ENGINE ABNORMAL OIL PRESSURE 0018 00 MALFUNCTION 7: High oil level (overfull). PROBABLE CAUSE CORRECTIVE ACTION a. Overfilled in error. (1) Drain to proper level. b. Oil diluted with fuel. (1) Refer to Malfunction 8 in this work package. MALFUNCTION 8: Oil diluted with fuel (evidenced by rising oil level, thin oil consistency). PROBABLE CAUSE CORRECTIVE ACTION (1) Drain oil and refill with proper oil (refer to lubrication order). a. Engine operating at idle for extended periods during cold weather. (2) Avoid operating at idle for extended periods during cold weather. b. Fuel leakage at fuel injector nozzle body. (1) Locate faulty nozzle as follows. PROCEDURE OBSERVATION ANALYSIS Look for any signs of fuel leakage at nozzle. Leakage indicates nozzle is defective. Operate engine at idle speed. Note any movement (jumping) of nozzle in cylinder head (visually or by touch). Movement indicates loose nozzle cap nut in body or collapsed nozzle holder spring. Nozzle is defective. PROBABLE CAUSE CORRECTIVE ACTION b. (Continued) Fuel leakage at fuel injector nozzle body. (2) Repair or replace nozzle assembly (WP 0114, Fuel Injector Nozzle Replace/Repair). c. Engine fuel supply pump shaft seal leak. (1) Repair or replace pump assembly (WP 0047, Fuel Pump Replacement (2CA & 2DA), use (WP 0048 for 2DR). d. Fuel injection pump internal fuel leak into oil. (1) Replace fuel injection pump (WP 0115, Fuel Injection Pump Assembly Replacement). MALFUNCTION 9: Excessive oil consumption (150:1 fuel-to-oil ratio maximum). PROBABLE CAUSE CORRECTIVE ACTION a. Loss of oil due to leaks. (1) Inspect engine for oil leaks. Repair as required. b. Oil level overfull. (1) Refer to WP 0031, Engine Oil Replacement. WP 0018 00-3