Diesel Data: Automotive Repair

Power Steering Pump: Description and Operation




P/S Pump Description

The power steering pump is a vane type and is driven by the V-ribbed belt from the crankshaft.

Power steering (P/S) pump specifications






Flow Control Valve (Relief Valve)

As the discharge rate of the P/S pump increases in proportion to the pump revolution speed, a flow control valve is added to control it so that the optimum amount of fluid for steering operation is supplied according to the engine speed (driving condition).