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 11: WP 0020 00-13 (14 blank) Fuel return, check valve defective. PROBABLE CAUSE CORRECTIVE ACTION (1) Remove and inspect valve for proper seating (no leakage allowed). a. Check valve not seating (leaking at seat) (2) Replace valve if leakage is detected. MALFUNCTION 12: Automatic water drain system in-operative. PROBABLE CAUSE CORRECTIVE ACTION (1) Open manual drain cock and drain into suitable container. If more than one quart of water is drained, system is inoperative. a. System malfunction (water not draining). (2) If excessive water is found in filter, replace filter elements (WP 0085, Fuel/Water Separator Filters Repair and Element Replacement). b. Electrical wiring defect. (1) Check voltage supply to control unit and repair or replace wiring as required, refer to pertinent vehicle technical manual. c. Solenoid valve defective. (1) Apply 24 volts to solenoid and check operation. If defective, replace solenoid valve (WP 0087, Manifold Heater Fuel Filter and Solenoid Replacement). d. Control unit or sensors defective. (1) Replace control unit and sensor assembly (WP 0084, Fuel/Water Separator Automatic Drain System and Wiring Harness Replacement). END OF WORK PACKAGE