NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
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NMWR 9-2815-220 FINAL ASSEMBLY AND TESTING—Continued 0047 00 FINAL PERFORMANCE CHECK – Continued h. Blow-by Flow. With engine at full rack - full load, blow-by must not exceed 18 cfm with new cylinders. With wear limited cylinders, blow-by must not exceed 21 cfm. i. Lubricating Oil Temperature. Temperature of oil in the engine oil pan pump must not exceed 250° F (121° C). Temperature of oil entering the engine through the oil pump must be maintained between 160° F and 220° F (71° C and 104° C). j. Oil Pressure. Crankcase gallery oil pressure must not be more than 70 psi or less than 40 psi when engine is operating at 2400 rpm, and must not be less than 15 psi when engine is idling at 700 to 750 rpm, measured at and/or adjacent to the oil pressure sending unit, with a minimum oil temperature of 140° F (60° C) measured at main oil gallery (oil cooler outlet), using MIL-PRF-2104G, Type I, Grade 10W40 oil. k. Temperatures. Induction inlet air temperature must be maintained between 60° F and 100° F (15° C and 38° C) and fuel temperature between 60°F and 100°F (15°C and 38°C). l. Fuel Pressure. The fuel pressure at the injection pump inlet must be 40 psi minimum. m. Manifold Pressure. The intake manifold pressure at full load must be 2.05 to 2.35 times the turbosupercharger compressor housing inlet pressure (dry barometer reading). Variation between left and right banks must not exceed 4 inches Hg. n. Exhaust Smoke Density Test. The maximum exhaust smoke density at full load, when measured within one foot of the exhaust outlet, must not exceed the following conditions when using fuel conforming to MIL-DTL-83133 (JP8): Engine Robert Bosch RPM smoke meter no. 1800 4.0 – 4.5 2000 3.7 – 4.2 2200 3.2 – 3.7 2400 3.0 – 3.5 2. Engine Final Performance Check Log Sheets. The information below is an outline of procedures to be used when entering data in the engine final performance check log sheets. Log sheets must be maintained neat and legible, and must contain all necessary data. a. Calculate the observed brake horsepower (bhp) and specific fuel consumption for all readings. b. Enter the gross corrected bhp for all full load readings on the acceptance run. c. Use the Army and Navy method of recording time. d. Enter all data, including serial number of accessories, at the start of the run. If it is found necessary to change accessories, record the serial number of the part removed and tag it properly for disposition. Also, enter the serial number of the new part added with an explanation as to why the original part was changed. e. On the acceptance run, when replacements, changes, or adjustments are made to the engine that materially affect its performance, such as injectors, valve timing, etc., the engine shall be thoroughly warmed up and thereafter performed satisfactorily on all full load points. When minor changes or adjustments are made, the engine shall run at various speeds, after such changes, sufficient to ascertain that the parts are performing satisfactorily. 0047 00-2 Change 1