Posted by AG in IN on February 12, 2014 at 12:47:30 from (67.236.100.252):
In Reply to: Farmall A steering box posted by Keith Calhoun on February 12, 2014 at 10:25:04:
A's and early Super A's had the square-ended shaft and the steering arm that was supposed to clamp tight with a bolt. It worked, but wasn't the best idea.
Later Super A's got a tapered shaft and a different steering arm to fit to it. At one time IH either recommended these parts be used to replace the earlier square shaft/arm when replacing parts on the earlier SA's and A's, or discontinued the square ended shaft/arm so you didn't have a choice in the matter.
Later yet Super A's, the 100's and 130's got conventional style tie rod ends. That steering arm was only made for a tapered shaft (same tapered shaft as in the last paragraph). You would need the tapered shaft, the arm, both spindle arms and a set of tie rods to switch to that. The spindles may be different, too.
The 140 is the same idea as the late SA/100/130, but the size of the keyway in the shaft that holds either the steering arm or the steering gear to that shaft is different. It could be both keyways/keys. It's been a while since I've fiddled with one. I think, and that's a big "I THINK" that if the shaft, gear, and arm are all changed the parts from the 140 can be used on earlier tractors.
The high-crop tractors used a different steering arm with a deeper drop. I think the tractors that were equipped with the heavy front axle may have used the arm with a deeper drop as well.
If you're doing a rebuild, get the bushings and gasket from CIH. Bearings and seals should be able to be sourced elsewhere if desired, if not CIH should still have those too. IIRC the bushings in the aftermarket "kit" that's available have to be sized to fit the shaft.
AG
This post was edited by AG in IN at 12:57:20 02/12/14 2 times.
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