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 3: Accelerator and throttle linkage deficiencies. PROBABLE CAUSE CORRECTIVE ACTION a. Insufficient throttle travel. (1) Place 3/4-inch wide piece of writing paper over end of high idle adjusting screw and depress accelerator pedal fully. If control lever stop contacts adjusting screw and holds paper tightly, full throttle travel exists. Repeat this after each step in this Malfunction 3. b. Vehicle accelerator linkage loose, worn, binding, disconnected, improperly adjusted, or pedal return spring malfunction. (1) Inspect, repair, and adjust (refer to pertinent vehicle technical manual). c. Engine throttle linkages loose, worn, binding, improperly adjusted or disconnected. (1) Inspect, repair or replace as necessary (WP 0122, Throttle Control and Manual Fuel Shutoff Replace/Repair). (WP 0123 for 2DR) d. Engine throttle cross-shaft idle or full- throttle positions improperly adjusted. (1) Adjust to proper stop clearances (WP 0043, Throttle Adjustments). (1) Inspect for broken spring and replace (WP 0122, Throttle Control and Manual Fuel Shutoff Replace/Repair. (WP 0123 for 2DR) e. Engine throttle cross-shaft shock spring defective (broken spring allows free movement between tangs and lever pins). (2) Check free movement. Replace spring if clearance is greater than 0.010 inch. (1) Adjust low idle screw to proper engine speed (675-725 rpm). Turn clockwise to increase and counter clockwise to decrease speed (WP 0040, Engine Operating Parameters). f. Improper low idle adjustment (engine cross- shaft idle screw). (2) If speed below 725 rpm cannot be obtained with adjustment above, proceed to Malfunction 6 in this work package. g. Engine will not maintain 1800 rpm speed during winching operations (AVDS-1790- 2DR only). (1) Adjust speed control solenoid screw (WP 0040, Engine Operating Parameters), or repair throttle control solenoid assembly (WP 0122, Throttle Control and Manual Fuel Shutoff Replace/Repair. (WP 0123 for 2DR) WP 0020 00-2