Technical data

15
The push rods are made of steel bars. The spherical part that goes inside the cam fol-
lower and the rod cup are hardened.
The rocker arms are made of steel. They swing on the rocker shaft supported by four
brackets. The outermost brackets have increased hardness. The rocker arm axle is hollow and has
eight radial holes to supply lubrication oil to the rocker arms. The rocker arms travel along the ax-
le is limited by the spacer springs.
The intake and exhaust valves are made of high-temperature steel. They travel in guide
bushes pressed in cylinder heads. Each valve is closed by means of two springs: the outer and in-
ner ones. The springs actuate the valve via plates and valve keepers.
The Seal collars fixed on guide bushes do not let oil penetrate into engine cylinders
through clearances between the valve stems and the guide bushes.
1.2.2.5. Fuel System
As shown in Fig. 8, the engine fuel system consists of the fuel pump, injectors, low and
high pressure pipes, air cleaner, intake and exhaust manifolds, coarse and fine fuel filters as well as
the fuel tank mounted onto the tractor (machine).
The fuel system of the D-245 diesel engine includes a turbo-supercharger.