TM-9-2815-220-24 Maintenance Manual for AVDS-1790-2CA AVDS-1790-DA and AVDS-1790-2DR Engines Download
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TM 9-2815-220-24 FUEL SYSTEM ABNORMAL CONDITIONS 0020 00 MALFUNCTION 6: (Continued) Fuel injection pump deficiencies. PROBABLE CAUSE CORRECTIVE ACTION g. (Continued) Fuel control stuck in "no-fuel" position (result of improper preservative oil during long term storage). (6) If engine fails to start, replace fuel injection pump (WP 0115, Fuel Injection Pump Assembly Replacement). h. Fuel injection pump drive coupling failure (pump not rotating). (1) Check fuel injection pump rotation as follows: PROCEDURE OBSERVATION ANALYSIS Remove top deck, engine rear cooling fan vane and rear fan. Fuel injection pump shaft is rotating. Drive coupling is satisfactory. Crank engine. Fuel injection pump shaft and/or coupling do not rotate. Fuel injection pump coupling failed or is loose on pump shaft. PROBABLE CAUSE CORRECTIVE ACTION h. (Continued) Fuel injection pump, drive coupling failure (pump not rotating). (2) Replace fuel injection pump drive coupling (WP 0116, Coupling, Fuel Injection Pump Replace/Repair. i. Fuel injection pump timing improper. (1) Check timing (WP 0036, Injection Pump Timing). j. Fuel injection pump internal failure. (1) Replace fuel injection pump (WP 0115, Fuel Injection Pump Assembly Replacement). MALFUNCTION 7: Engine fuel supply pump defective. PROBABLE CAUSE CORRECTIVE ACTION a. Fuel pump failure (insufficient fuel output due to defective regulating valve, internal pump wear or shaft seal leak causing fuel leakage into engine oil). (1) Check fuel pressure as follows: WP 0020 00-8