Power Steering - Power-Assisted Recirculating Ball: Description

Power steering system is composed of power steering pump, steering gear and connecting hoses. Both ZF and VT49 type pumps are used. Pumps have integral reservoirs. Some of these pumps are made of a light alloy material. The light alloy pumps are interchangeable with the cast iron type.

All power steering pumps are engine driven vane type with a control valve. The purpose of the power steering gear pump is to supply fluid (under pressure) to the steering gear.

Steering gear has integral piston/steering nut. Fluid pressure to each side of piston/steering nut is controlled by a control valve which is moved by a lever from steering column shaft. Steering system has a digressive action. Boost is relatively weak in the central range, and increases as steering resistance increases.