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 CLEAN AIR SYSTEM TROUBLESHOOTING 0026 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: Abnormal operation of dust detector system (power pack warning lamp and dust detector warning lamps ON, with pressure switch plunger(s) visible). PROBABLE CAUSE CORRECTIVE ACTION a. Restricted filter strip. (1) Service dust detector filter strip, refer to pertinent vehicle technical manual. b. Loose or defective hose clamps on turbosupercharger air inlet hose. (1) Repair or replace as necessary. c. Defective or missing seals at turbosupercharger air inlet elbow or air cleaner air outlet elbow. (1) Repair or replace as necessary. d. Restricted orifices in turbosupercharger compressor housing and cover. (1) Remove dust detector filter strip cover. Clean all orifices and cavities. Service filter strip. e. Defective pressure switch. (1) Remove pressure switch (WP 0082, Turbosupercharger Dust Detector System Replacement). Perform pressure switch operational check. PROCEDURE OBSERVATION ANALYSIS Install an adapter in the bottom (low pressure) opening in pressure switch. Pressure switch plunger pops up. Switch is operational. Suck on connector with the mouth. Pressure switch plunger does not pop up. Switch needs to be replaced. Remove adapter and replace switch. No continuity. Switch defective. Replace pressure switch. Using a voltmeter, check for continuity across the two pressure switch connector pins. There is continuity. Switch is operational. WP 0026 00-1