A park brake actuator, comprising: a housing; a piston comprising a piston rod and a piston head, the piston being provided in the housing; a spring, wherein the spring is arranged between the piston head and one side of the housing; an opening in the hous...

An air-treatment system for a utility vehicle, comprising at least one air-treatment unit and at least one air-dryer cartridge, detachably screwed onto the air-treatment unit, wherein the air-dryer cartridge has an identification element on an outer side o...