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|BW||Hi. I have a Kubota B6200 which has steering problems. The steeing block inside the steeing box has two tubes for routing the ball bearings which travel inside a worm shaft which is housed inside the block. One of the tubes has become bent. Kubota sells the whole block assembly (Kubota Canada part #6791041110 COMP.BALL NUT) which is very expensive. Does anyone know if these tubes are available separately? Anyone have instructions how these ball bearings are fed back into the block? How many ball bearings should there be? Are they all the same size? Anyone have diagrams?
Any help is greatly appreciated. Thanks in advance.
|Brian T||BW, from an engineers stand point I'll offer what I can. In my engineering experience, I've used many types and sizes of ball nuts. I've never been able to purchase just the ball transfer tubes. Always had to purchase a new complete nut assembly. They are expensive even in the OEM industry.The ball bearings make the circuit around the lead screw and this tube transfers the ball back to the nut. Quantiy of balls depends on the original design intent (backlash) of the steering system. All the balls will be the same diameter, again depending on the design intent. Precision leadscrews and ball nuts will be very high precision. In this steering application they would not be high precision type. If you wanted to learn more about ball nuts you can go to the web and get tons of information. Sorry to say it but it is extremely likely that you will have to buy a complete ball nut. However, if you are clever and mechanically smart, you may be able to take out the kink in the tube, as long as the balls can freely pass through the tube you will get by OK. For this application, one or two balls missing, you may not notice any effect on your steering.