GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1998 🢒 Cutlass 🢒 Steering 🢒 Power Steering System 🢒 Power Steering Pump Description

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

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.