Consequential damages of failed lubrication PROGNOST® successfully detected irregularities during the supply of lube oil at the crosshead. Based on two case studies, the following text illustrates the necessity of appropriate monitoring. The operation mode of a reciprocating compressor requires the continuous supply of lubrication. This is due to the multitude of moving parts that are required to convert the rotating into an oscillating movement. This movement is implemented by the crosshead. This component moves between two contact surfaces and is continually subject to high forces, i.e. compression and tension, as well as friction. At the centre of the crosshead, a ‘crosshead pin’ connects the crosshead to the piston, onto which, facing the side of the cylinder, the piston rod is bolted.

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