DeVille DHS V8-4.6L VIN Y (2000)
Power Steering Pump: Description and Operation
A vane-type constant displacement pump provides hydraulic pressure for the system. The 4.6 liter engine uses an S4 series pump. The major
components of the power steering pump are the drive shaft, pump housing, pump ring, pressure plate, thrust plate, control valve, and rotor and vane
assembly. The reservoir is separate from the housing and internal parts. A pressure relief valve is used to limit pump pressure.
