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 NOISY OPERATION 0015 00 MALFUNCTION 2: (Continued) Diesel knock ("ping," usually at low-idle speed). PROBABLE CAUSE CORRECTIVE ACTION b. Return fuel line disconnected or restricted. (1) Inspect fuel line (WP 0080, Fuel Injection Nozzle Return Hoses and Related Parts Replacement). c. Engine fuel-injection pump. (1) Check timing (WP 0036, Injection Pump Timing). MALFUNCTION 3: Grinding or squeaking sound. PROBABLE CAUSE CORRECTIVE ACTION a. Cooling fan interference (fan housing vane or foreign material). (1) Inspect fan for proper clearance (WP 0053, Cooling Fan Inspection). Repair or replace damaged parts. b. Engine accessories. (1) Replace damaged accessory. c. Worn or damaged gears, camshaft, rocker arm bearing or bushings. (1) Check for damage (WP 0178, Disassembly/ Assembly Procedure Sequence for the AVDS 1790-2 Engine). END OF WORK PACKAGE WP 0015 00-4