The camshaft is divided into sections, one for each cylinder, enclosed and suspended in roller guide housings with replaceable ready-bored

Figure 13.8 Components of hydraulically actuated exhaust valves

bearing shells. The cams and couplings are fitted to the shaft by the SKF oil-injection pressure method and the complete camshaft unit is driven by chain from the crankshaft. For reversing of the engine, the chain wheel floats in relation to the camshaft which is driven through a self-locking crank gear; reversing crankpins are turned by built-on hydraulic motors.

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