I took this steering wheel apart on this John Deere 4430 this week. It has all the hydraulic steering components located in the dash. The bottom of this has a her gear driven pump that pushes the fluid to the main pump in front. This in turn makes the whole thing steer. I also worked on the Kubota and finished it this week after I finally got the clutch in from Canada. I also got the other 4430 I tore apart last week finished and the new 8sp auto installed. I also replaced a starter solenoid on the Deere 4430.