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 PERFORMANCE LOW 0019 00 THIS WORK PACKAGE COVERS: WP 0019 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. CAUTION If a rough, noisy, or overheated engine is associated with the reported low power, prior correction of these malfunctions often will eliminate the poor performance and, in addition, may prevent further damage to the engine. When low power or poor vehicle performance is reported, an engine "stall" speed test will indicate whether the malfunction is engine or vehicle related. PRELIMINARY INVESTIGATION PROBABLE CAUSE CORRECTIVE ACTION a. Engine rough operation. (1) Refer to WP 0014, Engine Rough Operation. b. Engine noisy. (1) Refer to WP 0015, Engine Noisy Operation. c. Engine overheating. (1) Refer to WP 0017, Cooling System Deficiencies. POWER VERIFICATION: Perform engine "stall" test as follows: PROCEDURE OBSERVATION ANALYSIS 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, release accelerator pedal and allow engine to idle 1 minute. Engine speed below 1800 rpm. NOTE Use a calibrated tachometer for "Stall Test". CAUTION Limit "Stall Test" to 30-second intervals maximum, and terminate immediately if transmission warning light activates. Engine and transmission partially warmed up (not to normal operating temperature of 140ºF).