Steering: Description and Operation
General DescriptionThe hydraulic power steering system consists of a pump, an oil reservoir, a steering unit, a pressure hose and a return hose.
Power Steering Unit
The power steering unit is rack and pinion type. The toe- in angle can be adjusted by turning the rod on each side. The steering housing cannot be disassembled.
Pressure Switch
When hydraulic pressure reaches 3430 kPa (500 psi), the pressure switch of the power steering pump closes causing the Engine Control Module (ECM) to actuate the idle air control valve, which increases the engine rpm to prevent the overload-induced engine speed slow down. The switch opens when hydraulic pressure drops to 2940 kPa (430 psi).