The engine camshaft is used to drive the fuel pump and to operate the exhaust valve mechanism. It is located in the housing for the roller guides. The camshaft bearings consist of two mutually interchangeable bearing shells, which are mounted in hydraulically tightened casings.
Crosshead is attached on the upper part of the connecting rod, which connects the con-rod to the piston rod. The guide and the guide shoe runs on the guide rail to support the crosshead pin and to transfer the side thrust of the crosshead to the engine frame.