An example cleaning system includes an engine, a high-pressure pump, and an electromagnetic clutch assembly. The electromagnetic clutch assembly selectively couples the engine to the high-pressure pump such that actuation of the electromagnetic clutch assembly controls a supply of power from the engine to the high-pressure pump. An example electromagnetic clutch assembly is also disclosed.

A vehicle heating system having a first viscous clutch and a pump and viscous clutch mechanism. The first viscous clutch has a first clutch input member. The pump and viscous clutch mechanism has a pump and a second viscous clutch. The pump includes a pump input member, while the second viscous clutch includes a second clutch input member. One of the pump input member and the second clutch input member is drivingly coupled to a portion of the first viscous clutch.