Question 19

The Correct Answer is A **Explanation for Option A ("A"):** Component "A" identifies the main control valve (often referred to as the spool valve or rotary valve) within the power steering gear. The original six-way valve found on early steering gears was responsible for directing pressurized fluid from the pump to the appropriate side of the power piston based on the direction of steering input. Component "A" is the modern, integrated device that performs this exact metering and directional control function, thus acting as the direct replacement for the older six-way valve system in updated steering gear designs. **Explanation for Incorrect Options:** * **Option B ("B"):** Component B typically identifies the input shaft, the torsion bar, or perhaps the hydraulic piston itself. While essential parts of the steering gear, they do not function as the fluid control and metering valve that replaced the six-way valve. * **Option C ("F"):** Component F is often used to label ancillary parts such as seals, thrust bearings, the pitman shaft, or the adjusting plugs. These components are structural or supporting elements, not the primary flow control device. * **Option D ("H"):** Component H usually designates the ball nut assembly (in recirculating ball types) or the main steering gear housing/body. These components provide the structural framework and the mechanism for mechanical movement but are not the fluid control valve that replaced the six-way valve.