This orbitrol unit directs hydraulic flow from the steering pump to the steering cylinder in response to steering wheel input. It sits between the steering column and the steering actuator, converting rotational movement into proportional hydraulic flow that positions the front wheels. Internal rotary spool and sleeve assemblies meter the oil volume based on steering angle and speed. Wear in the metering surfaces or internal seals causes steering drift, reduced response, or increased steering effort. This unit is manufactured to match the original housing geometry and port configuration, so no adapter plates or line modifications are required during installation.