TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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CHAPTER 8 ENGINE TEST AND ENGINE CONTAINER Section I. ENGINE TEST AND ADJUSTMENTS 8-1. Engine Specifications a. Speed Range. The engine must operate satisfactorily under all loads through a speed range of 1400 to 2400 rpm and must idle satisfactorily at 675 to 725 rpm. b. Gross Horsepower (Without Accessories). Under full throttle setting, engine will develop 750, plug or minus 15, gross horsepower at 2400 rpm, using fuel conforming to specification VV - F-800 (DF-2) and the correction factors provided in tables 8-2 through 8-5. c. Gross Torque (Without Accessories). Under full throttle setting, engine will develop the following gross torque using fuel conforming to Specification VV-F-800, DF-2. (1) 1720 lbs/ft. - plus or minus 2.0% @ 1800 rpm. (2) 1635 lbs/ft. - plus or minus 2.0% @ 2400 rpm. d. Oil Consumption. Engine shall not con- sume more than 0.0075 pounds per brake horsepower hour (lbs / bhp / hr) of lubricating oil when operating under full load and using engine oil conforming to Military Specification MIL-L-45199 Grade 2 (SAE 30). e. Fuel Consumption (Without Accessories). When operating at full throttle under full load, on a dynamometer, at a speed of 2400 rpm, engine shall consume not more than 0.420 pounds per brake horsepower hour (lbs / bhp / hr) fuel conforming to Specification VV-F-800 (DF-2). f. Exhaust Gas Temperature. Exhaust gas temperatures, measured at individual cylinder ports, shall not exceed 1250” F. Temperature variation between cylinders shall not exceed g. Blow-by Pressure. With engine under full throttle and full load, blow-by shall not exceed 18 cfm. h. Lubricating Oil Temperature. Tem- perature of oil in the engine pan sump shall not exceed 230 F. Temperature of oil entering the engine through the oil pump shall be maintained between 160°F and 22°F. i. Oil Pressure. (1) Engine oil pressure shall not be more than 70 psi or less than 40 psi when engine is operating at 2400 rpm, and shall not be less than 15 psi when engine is idling at 675 to 725 rpm, measured at and / or adjacent to the oil pressure sending unit, with the oil temperature of 160°F to 180°F, using engine oil specified in paragraph d, above. (2) Piston oiler nozzle oil pressure shall be 35 psi minimum at 2400 rpm measured at plug on left side of crankcase, at rear, above starter. j. Temperatures. The preferred induction air inlet temperature is 85°F plus or minus 10 F. k. Fuel Pressure. The fuel pressure at the injection pump inlet shall be 30-40 psi at engine speeds of 1800 to 2400 rpm. l. Manifold Pressure. Intake manifold pressure rise above atmospheric after the tur- bosupercharger with boost, shall not exceed 35 inches Hg.; without boost 28 to 32 inches Hg. Variation between left and right banks shall not exceed 4 inches Hg. m. Exhaust Smoke Density Test. The maximum exhaust smoke density at full power position, when measured within one foot of the exhaust outlet, shall not exceed the following conditions when using fuel in accordance with 150°F. grade DF-2 of Specification VV-F-800. 8-1