TM-9-2815-220-24 Maintenance Manual for AVDS-1790-2CA AVDS-1790-DA and AVDS-1790-2DR Engines Download
Page 127 of 1563
TM 9-2815-220-24 ENGINE ABNORMAL EXHAUST 0016 00 THIS WORK PACKAGE COVERS: 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: Excessive black smoke (one or both banks). PROBABLE CAUSE CORRECTIVE ACTION a. Induction air inlets blocked with debris. (1) Inspect and clean air inlet grilles and air cleaner inlets. b. Air cleaner restriction (element dirty, wet, or blower motor inoperative). (1) Check restriction 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 Perform "stall" test as follows. Start engine and warm to normal operating temperature (140 °F). With vehicle brakes applied and transmission in "high range", depress accelerator pedal fully and operate engine for 20 seconds (max.); release accelerator pedal and allow engine to idle 1 minute. Engine speed below 1800 rpm. Engine and transmission partially warmed up (not to normal operating temperature of 140ºF). WP 0016 00-1