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Uses hydraulic pressure to assist the driver in moving the rack and the front wheels

Power Rack-and-Pinion Steering. Uses hydraulic pressure to assist the driver in moving the rack and the front wheels. Power Rack-and-Pinion System. System Operation. When the steering wheel is turned, vehicle weight causes the front tires to resist turning, moving the control valve

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Uses hydraulic pressure to assist the driver in moving the rack and the front wheels

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  1. Power Rack-and-Pinion Steering Uses hydraulic pressure to assist the driver in moving the rack andthe front wheels

  2. Power Rack-and-Pinion System

  3. System Operation • When the steering wheel is turned, vehicle weight causes the front tires to resist turning, moving the control valve • Movement of the control valve, aligns specific oil passages internally • Pump pressure forces oil through the control valve, to the power cylinder • Pressure acts on the power piston, pushing the rack, and the front wheels

  4. Power Steering Pump • Engine driven pump that produces the hydraulic pressure for steering system operation • Driven by a belt or directly off the back of the camshaft • Power steering fluid reservoir may be formed as part of the body or as a separate container

  5. PumpTypes

  6. Pressure-Relief Valve • Used in a power steering system to control maximum oil pressure • Prevents system damage by limiting pressure • Valve opens when the steering wheel is turned to the full-left or full-right position

  7. Power Steering Hoses • High-pressure, hydraulic, rubber hoses that connect the power steering pump and the gearbox or power cylinder • One line serves as the pressure feed line • One line serves as a return line to the reservoir • Steel line may be used where movement is not necessary

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