NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
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0002 00-1 Change 1 NMWR 9-2815-220 EQUIPMENT DESCRIPTION AND DATA 0002 00 EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES Engine Models AVDS-1790-2CA, AVDS-1790-2DA, and AVDS-1790-2DR are similar and all use the same major components. The main components consist of the crankcase, crankshaft, cylinders, pistons, connecting rods, camshafts, damper housing, turbosuperchargers, starter, fuel injection pump, and fuel supply pump. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS 1. Location of Engine Components. a. Engine Ends. The ends of the engine will be called the damper end or front and flywheel end or rear. b. Engine Sides. As viewed from the front end toward the rear, the side to the right will be called the right side and the side to the left will be called the left side. Beginning at the front, the right bank of cylinders is numbered 1R through 6R and the left bank of cylinders is numbered 1L through 6L. c. Main Bearing Numbering. Starting from the front, the main bearings are numbered 1 through 7. d. Component Numbering. The cylinders, pistons, connecting rods, and connecting rod bearings are numbered with their respective cylinder number locations. 2. General Description. a. Cylinders. Models AVDS-1790-2CA, AVDS-1790-2DA, and AVDS-1790-2DR engines are 12-cylinder, 90°, V-type, 4-cycle, air-cooled, turbosupercharged, diesel engines The cylinder assemblies are individually replaceable units, with overhead valves and valve rocker assemblies in the head. The cylinders are arranged in two banks of six cylinders each. Each bank of cylinders has an overhead camshaft arrangement to actuate the valves of each cylinder. b. Fuel System. The engines feature a fuel injection system and a turbosupercharged air induction system which obtains optimum engine performance. The fuel injection system has a fuel injection metering pump which supplies metered fuel to individual cylinders through fuel injector nozzles. The fuel supply pump assembly located at the front of the engine, draws fuel from the vehicle fuel tanks and delivers it to the fuel injection pump. A turbosupercharger assembly is located on each side of the engine at the rear. The turbosuperchargers are exhaust-gas driven and increase the air flow pressure entering the air intake manifolds. c. Fuel Filtering System. The engines include an engine primary fuel filter and fuel/separator type secondary fuel filter. Both filters have top mounted bleeder valves for removal of air from the fuel system. Water is removed automatically by a constant bleed orifice in the primary fuel filter and by an automatic water drain in the fuel/water separator secondary fuel filter. d. Engine Generator. (1) Model AVDS-1790-2CA Engine Generator. The Model AVDS-1790-2CA engine is equipped with a 28 volt oil cooled dc generator capable of 650 ampere output over the engine’s operating range. This generator develops an alternating current which is rectified within the unit to produce a direct current at the output terminals.