The scenario you've described involves the power steering pump belt breaking in a rack and pinion power steering system. Let's break down the consequences of this event:
The spool valve no longer moves inside the rotary valve when the steering wheel is turned:
This is likely because the power steering pump is responsible for pressurizing the power steering fluid, and without the pump functioning, there won't be hydraulic assistance to move the spool valve. The spool valve is crucial in directing hydraulic fluid to assist with steering.
The steering operates like a manual steering system, and steering effort is higher:
Without the power assistance provided by the power steering pump, the steering system reverts to manual mode. Manual steering requires greater physical effort from the driver, as they need to directly manipulate the mechanical components of the steering system.
Power steering fluid may be forced from the rack seals when the steering wheel is turned:
In a power steering system, the hydraulic pressure generated by the power steering pump helps to move the components smoothly. Without the pump functioning, attempting to turn the steering wheel could potentially force power steering fluid past the seals in the rack and pinion assembly.
The torsion bar may be broken when the front wheels are turned to the right or left:
The torsion bar is a component of some suspension systems and is not directly related to the power steering pump or belt. Its primary purpose is to provide stability and support in the suspension system. The breaking of a torsion bar might cause issues with the suspension but wouldn't be a direct result of a broken power steering pump belt.
In summary, the key effects of a broken power steering pump belt in a rack and pinion power steering system include a loss of power assistance, increased steering effort, potential leakage of power steering fluid, and possible issues with the functioning of the spool valve. The breaking of a torsion bar, however, is more related to suspension concerns and is not a direct consequence of the power steering pump belt failure.