I know I said I would post pictures of some of the tractors we get in for parts, but I thought this time I would show something just a little different.
This is a model 91 IH combine. It doesn't have a steering wheel, it uses "tiller bar" steering similar to a dozer. It is different though, when you pull the tiller bar back half way, the coresponding wheel stops, all the way back and the wheel spins in reverse. Rather than just a steering clutch and brake setup like a dozer, it has a planetary gear set that when the steering clutch is released and the steering brake engaged turns the wheel back wards. Quite interesting to drive! It will rotate around it's axis, pretty cool!