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 INTAKE MANIFOLD HEATER ABNORMAL OPERATION 0023 00 MALFUNCTION 1: (Continued) Manifold heater inoperative. PROCEDURE OBSERVATION ANALYSIS Fuel System Checks WARNING • Keep hands away from nozzle during test. Moderate flow with each stroke indicates normal purge pump operation. Purge Pump: Disconnect purge pump fuel hose quick disconnect coupling at engine main fuel back flow valve. Hold coupling valve open and operate purge pump. Note fuel with each firm stroke of purge pump. If flow is not evident, purge pump is defective, or purge lines are blocked or leaking. See appropriate vehicle technical manual. Moderate flow with each stroke indicates no in-line filter restriction. Filter satisfactory. Fuel Filter: Disconnect fuel tube between fuel check valve tee and manifold heater fuel filter and operate purge pump. Note fuel flow with each stroke of purge pump. No flow, or restricted flow, indicates filter is plugged. See appropriate vehicle technical manual. WP 0023 00-4