Cooling and Warming-Up System

The cooling system is of the combination closed-circuit type employing water as the coolant and relying for operation on forced circulation in the cylinder heads and on the convection of heat in the block. Jacket water is cooled in a special heat exchanger. Fig. Cooling and warming-up system, 5П2, 8П2, 10П2, П12, П21, П22 and

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Lubricating System

The lubricating system provides a supply of oil to all the rubbing surfaces of the diesel engine and serves to remove impurities from the engine. Fig. Lubricating system, 5Д2, 5Д2-1, 5П2, 8П2 and 10П2 diesel engines: 1 – outflow of oil from sump; 2 — strainer; 3 — thermometer; 4 — oil pump; 5 —

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Fuel System

The fuel system serves to feed fuel in metered amounts (depending on the load) into the turbulence combustion chambers under a high pressure, to atomize the fuel into minute particles and to assure regularity and requisite sequence of the injections. Fig. Fuel system, 5Д2, 5Д2-1, 5П2, 8П2 and 10П2 diesel engines: l – drain lube;

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Valve Gear

The camshaft obtains the drive from the crankshaft through the timing gears. The cams acting upon the tappets, pushrods and rocker arms cause the valves to open in a strict sequence. Fig. Connecting rod, 5Д2, 5Д2-1, 5112, 8П2 and 10П2 diesel engines: 1 — camshaft timing gear; 2 — ratchet wheel; 3 — key; 4

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Connecting Rod-Crank Mechanism

Diesel engines are fitted with steel crankshafts which are forged, heat-treated and accommodated in block recesses. Crankshaft Crankshaft 29 rests in the main bearings by means of its journals; in addition, thrust bearing 32 prevents the crankshaft from axial displacement. The bearings are splash-lubricated except for the crankpin bearings which are taken care of by

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Cylinder Head

Each cylinder head is provided with inlet and exhaust passages, turbulence combustion chambers with injectors, heater plugs 19 and cooling jackets. Topping each cylinder head are the valve gear protected by valve covers 8, exhaust manifolds and air cleaner (strainer). Fig. Cylinder head: 1 — cylinder head; 2 — rocker arm bracket; 3 — adjusting

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Cylinder-and-Crankcase Block

Diesel engines are provided each with cast iron cylinder-and-crankcase block 1 which serves to accommodate all the components and units of the engine. Press-fitted into block 1 are cylinder liners 17. The outside surface of the liners is washed by the coolant, and the water jacket is sealed off by shoulders at the top and

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