Ford Focus manuals

Ford Focus Service Manual: Power Steering

The power steering system consists of the following components:

The power steering system uses a vane-type pump to move the fluid from the reservoir to the steering gear and through the rest of the steering hydraulic system. The power steering pump is mounted to the engine and driven by the engine accessory drive belt. Power steering fluid enters the pump from the reservoir. The power steering fluid is then trapped between the pump vanes and moved to the high-pressure side of the pump creating a flow of fluid. The restriction of this flow by the steering gear creates the pressure that provides the steering assist. A combined pressure relief/flow valve is built into the pump to control the maximum pressure and flow provided to the steering system. This action prevents damage to the system and provides the correct level of assist during all engine speeds. While under pressure, the power steering fluid flows through the high-pressure power steering line to the steering gear. The fluid exits the gear and flows through the return line, through the cooler (if equipped) and to the reservoir. The reservoir slows the fluid, allows air to escape and filters the fluid before returning it to the pump.

Hydraulic Steering
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Power Steering Pressure (PSP) Switch
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