K 2500 Truck 4WD V8-454 7.4L VIN J SFI (1997)
Power Steering Pump: Description and Operation
The power steering pump is a vane-type design. The submerged pump has a housing and internal parts that are inside the reservoir and operate
submerged in oil.
There are two bore openings at the rear of the pump housing. The larger opening contains the cam ring, pressure plate, thrust plate, rotor and vane
assembly, and end plate. The smaller opening contains the pressure hose union, flow control valve, and spring. The flow control orifice is part of the
pressure hose union.
The pressure relief valve inside the flow control valve limits the pump pressure.