The invention relates to a piston-cylinder unit. A piston motion sensor is arranged in a transverse bore of a cylinder head of the piston-cylinder unit. According to the invention, a positioning and/or alignment element is supported in the transverse bore on a floor, on which in turn the piston motion sensor is supported. The positioning and/or alignment element predetermines the axial position of the piston motion sensor in the transverse bore. In addition, the positioning and/or alignment element can predetermine the alignment of the piston motion sensor. The piston-cylinder unit can be used, for example, for a work machine, construction machine, agricultural machine, a maritime machine, a wheeled loader, a digger, a dump truck, a crane, a forklift or a lifting platform.

The subject matter of this specification can be embodied in, among other things, an apparatus that includes a first assembly having a first piston rod having a first rod end, a second assembly arranged substantially parallel to the first piston assembly and having a second piston rod having a second rod end, an end assembly defining a first aperture configured to receive the first rod end, and a second aperture configured to receive the second rod end, a first retaining cap configured to affix to the first rod end, abut the end assembly when affixed to the first rod end, and retain the first rod end within the first aperture, and a second retaining cap configured to affix to the second rod end, abut the end assembly when affixed to the second rod end, and retain the second rod end within the second aperture.

A control system includes: an actuator piston having an end cap, the actuator piston being reversibly translatable; a supporting member coupled to the end cap, the supporting member being configured to couple the end cap to a sensor; and a retaining device configured to maintain the coupling between the end cap and the supporting member when the end cap fails.