Does your model have adjustable tie rod ends that you could change the toe in? Comparing side to side, do the spindles seem the same or maybe one has a bend?

It might be that simple, or it could be much more complicated. I'm not familiar with this model Kubota, but I am aware of problems in 4-wheel drive systems and even in some 2-wheel drive systems using locking differentials where the drive components fail to release or "free wheel" properly in turns, resulting in hard steering and/or turf damage. Clicking the link will reveal the likelihood of the problem to occur, by the manner of how Kubota "pitches" their way of addressing the issue.

Here is a link that might be useful: Kubotonono

tomplum - you have a good question to which I don't know the answer. Hoping somebody would know.

mownie - thanks for the diagram. However the front left tire seams to be the problem.

If the left front tire scuffs on a hard right,the right side cable is broken,probably at the front,inside the rubber boot.That's the one that broke on mine.I went ahead and put both new cables on at a cost of 133 w/labor.Both cables are the same,so now I have a spare.For what the tractor does for me,I don't mind spending a few bucks on it now and then.

locknut - I checked under both front boots and the cables were in tact. They seemed loose so I thought an adustment was required. Since I couldn't find any info on cable adjustment I decided to go to the dealer. I didn't investigate any further at that point, just hurried up and off I went to the dealer. Turns out one of the cables was broken. The service rep didn't know where the cable broke but said he would make sure the mechanic saved the old cable. It will cost me about 140 as well. I run mine hard as well so I guess a visit to the dealer after four years isn't bad. Thanks for your help!

Thanks for the report back. We don't get the opportunity to service these often enough. Nice tractor.

Well it happened again. The glide steer cable broke. I called the dealer and he said the parts are not under warranty, however he would cut me some slack on the labor. The dealer also said if proper lubrication is not performed every 30 some hours then this can cause cable fatigue. I do lubricate my tractor. Probably every 10 hours. I think the cable is undersized. I'm not too pleased with Kubota!

Good news. The dealer said they were at fault and repaired my tractor at no cost. I was shocked. I will send a gratitude letter to corporate.