Principles of Operation
Principles of OperationPower Steering
The power steering system consists of the:
^ steering linkage.
^ power steering fluid reservoir.
^ steering wheel and column assembly.
^ power steering fluid lines.
^ front wheel spindle.
^ power steering pump.
^ steering gear.
^ power steering fluid cooler.
Power Steering Pump
The CIII power steering pump has these features:
^ It is a belt-driven, vane-type, power steering pump.
^ It is mounted directly to the engine block by 3 bolts (4.6L, 5.4L or 6.8L) or 4 bolts (6.0L).
^ The power steering pump is replaced as an assembly.
^ An identification tag attached to the power steering pump indicates the model number and bar code. Refer to these when pump replacement is required.
^ The power steering pump uses a quick connect fitting for the power steering pressure hose.
Steering Gear
The steering gear has these features:
^ It is a torsion-bar type hydraulic-assisted system.
^ It reduces road shock and vibration.
^ It includes a rotary-style hydraulic valve.
^ It uses a dot matrix ID mark on the gear housing between the valve housing and the sector shaft housing cover.
Steering Gear Identification
CAUTION: Always use the ID code when ordering service parts.
An identification tag may be attached to the valve housing.
Pump Identification
CAUTION: Always use the ID code when ordering service parts.
The pump identification code is located on a tag attached to the power steering pump.
