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 ROUGH OPERATION 0014 00 THIS WORK PACKAGE COVERS: WP 0014 00-1 Troubleshooting Table and Diagnostic Tests INITIAL SETUP: Tools: General mechanic’s tool kit (item 121, WP 0176) Personnel Required Track Vehicle Repairer (2) 63H10 Equipment Conditions: Engine installed in vehicle or ground hop. MALFUNCTION 1: Engine misfires (more noticeable at idle operation). PROBABLE CAUSE CORRECTIVE ACTION a. Water contaminated fuel. (1) Check fuel for water (WP 0020, Fuel System Abnormal Conditions). b. Engine operating at idle for extended period during cold weather. (1) Increase engine idle speed to 1000 - 1200 rpm. c. Fuel leak, nozzle high-pressure tube. (1) Inspect for leak (WP 0020, Fuel System Abnormal Conditions). d. Fuel injector nozzle defective. (1) Refer to WP 0114, Fuel Injector Nozzle Replace/Repair. e. No valve rocker clearance. (1) Locate faulty cylinder as follows: PROCEDURE OBSERVATION ANALYSIS Audible Check: Open grilles, remove top deck, engine shroud, and covers for access to cylinders. Operate engine at idle. Listen or use sounding rod to determine noisy cylinder. Location of noise isolates faulty cylinder.