Power Steering Pump: Description and Operation

The power steering pump is a vane-type pump which provides hydraulic pressure for the system. The power steering system consists of the following components:
- The driveshaft
- The pump housing
- The pump ring
- The pressure plate
- The thrust plate
- The flow control valve
- The rotor
- The vanes
The opening at the rear of the pump housing contains the following components:
- The pump ring
- The pressure plate
- The thrust plate
- The rotor
- The vanes
- The end plate T
The small opening on the side of the housing contains the following components:
- The pressure line fitting
- The flow control valve
- The spring
The flow control orifice is a component of the pressure line fitting. A pressure relief valve inside the flow control valve limits the pump pressure.