1gd422051a
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1GD422051A JETTA II quality steering rack
1GD422051A JETTA II quality steering rack is one kind of hydraulic unit which using the power of engine to change the car direction . The engine drives the oil pump to create hydraulic pressure , then the hydraulic pressure affects on the power cylinder piston , making the pinion produce auxiliary force to the rack . The auxiliary force is concerned with the piston pressure . Therefore , if more steering power is needed , the pressure should be increased . The hydraulic pressure is controlled by the control valve linked to the steering shaft
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