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 4: (Continued) In-tank fuel pump deficiencies. PROCEDURE OBSERVATION ANALYSIS Pump Output Check (Fuel Flow Capacity): (Continued) 3 gpm fuel flow Pump output is satisfactory. Time fuel flow into measured container. Fuel flow below 3 gpm. Pump output below normal. PROBABLE CAUSE CORRECTIVE ACTION b. (Continued) Pump output insufficient (defective pump, or screen clogged). (2) Repair or replace pump (refer to pertinent vehicle technical manual). MALFUNCTION 5: Fuel filter restriction. PROBABLE CAUSE CORRECTIVE ACTION a. Primary and/or fuel/water separator filter element clogged. (Dirt, water soaked or waxed.) (1) Check fuel pressure as follows: PROCEDURE OBSERVATION ANALYSIS Install pressure test gauges: 100 psi gauge in fuel/water separator filter cover bleeder valve opening (WP 0064, Fuel/Water Separator Automatic Drain System and Wiring Harness E2ca128-006 Replacement). 10 psi gauge in primary filter cover bleeder valve opening (WP 0086, Primary Fuel Filter Replacement). Turn master and in-tank fuel pump switches "ON". Less than 5 PSI at both fuel/water separator and primary fuel filters. In-tank pump is operative. Operate engine at high-idle speed (2500-2640 rpm). Zero psi at fuel/water separator filter, and zero psi at primary fuel filter. In-tank pump(s) inoperative or fuel line restriction. PROBABLE CAUSE CORRECTIVE ACTION a. (Continued) Primary and/or fuel/water separator filter element clogged (dirt, water soaked or waxed). (2) Replace defective filter elements (WP 0085, Fuel/Water Separator Filters Repair, and WP 0086, Primary Fuel Filter Repair). WP 0020 00-4