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 ENGINE PERFORMANCE LOW 0019 00 MALFUNCTION 1: (Continued) Low stall with both banks firing and normal smoke. PROBABLE CAUSE CORRECTIVE ACTION e. Fuel return restriction. (1) Inspect fuel return (WP 0020, Fuel System Abnormal Conditions). Repair as required. f. Fuel supply leaks. (1) Inspect for leaks and repair. g. Governor high-idle adjustment improper. (1) Check high-idle operation. If out of specifications, replace fuel injection pump (WP 0115, Fuel Injection Pump Assembly Replacement). h. Fuel injection pump fuel adjustment improper. (1) Replace fuel injection pump (WP 0115, Fuel Injection Pump Assembly Replacement). i. Engine fuel supply pump defective. (1) Check pump operation. (WP 0020, Fuel System Abnormal Conditions). Repair or replace as required. j. Fuel injection pump fuel pressure regulating valve defective. (1) Replace Fuel injection pump (WP 0115, Fuel Injection Pump Assembly Replacement). k. Fuel injection pump timing improper. (1) Check timing (WP 0036, Injection Pump Timing). Retime as required. MALFUNCTION 2: Low stall speed with black exhaust smoke: (one or both banks). PROBABLE CAUSE CORRECTIVE ACTION a. Vehicle air cleaner inlets blocked with debris. (1) Inspect and clean. b. Air cleaner restriction. (1) Check air cleaner as follows: PROCEDURE OBSERVATION ANALYSIS Pre-cleaner Blower: Note blast of air (on hand) from pre- cleaner air exhaust outlets, two on each air cleaner. Blast of air indicates blower(s) is operating. Start engine and operate at idle. No air blast. Blower(s) is inoperative. Air Cleaners: Normal speed (1800-1950 rpm). Air cleaner elements satisfactory. Perform "stall" test as outlined on page 1, this work package. CAUTION Do not perform under dusty conditions. Speed below normal. Proceed to next step. WP 0019 00-3