S15/T15 Sonoma P/U 2WD V6-4.3L VIN X (1998)
Power Steering Pump: Description and Operation
The power steering pump is a vane-type pump. It houses the internal parts that are inside the reservoir and operates 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 pump pressure.
