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 ABNORMAL OIL PRESSURE 0018 00 MALFUNCTION 10: (Continued) Excessive crankcase blow-by (high crankcase pressure). PROCEDURE OBSERVATION ANALYSIS Start engine, warm up to operating temperature, and perform "stall" test (WP 0041, Engine Stall Test). Go to WP 0016, Engine Abnormal Exhaust. 5 inch H 2 O (max.) pressure. Crankcase pressure is normal. Above 5 inch H 2 O pressure. Crankcase pressure is high, indicating excessive blow-by or restricted crankcase vent at turbocharger exhaust outlet pipe. PROBABLE CAUSE CORRECTIVE ACTION (2) Clean engine crankcase breather tube (WP 0078, Engine Oil Hose Assemblies, Tube Assemblies and Related Parts Replacement). a. (Continued) Rings worn or damaged. (3) Replace piston rings WP 0142, Pistons, Rings, and Associated Parts Replace/Repair. MALFUNCTION 11: Generator oil pressure abnormal (650 ampere generator). PROBABLE CAUSE CORRECTIVE ACTION a. Restricted oil lines. (1) Inspect lines for plugging or damage (WP 0091, Generator Oil Cooling System Lines and Fittings Replacement). b. Generator oil pump failure. (1) Perform Oil Pressure Test as follows: PROCEDURE OBSERVATION ANALYSIS Remove 1/8-inch pipe plug in center of generator end plate and install 200 psi gauge. Oil pressure 100 ± 10 psi. Generator oil pump operation is normal, the generator is rotating and the drive coupling is functioning. Start and warm up engine at idle speed (675-725 rpm) to operating temperature (140 °F). Oil pressure same as normal engine gallery pressure (15-25 psi). Generator oil pump failed, and/or generator not rotating, and/or drive coupling failed. WP 0018 00-5