Co-Op E4 Driving Problem Help

I am looking into an E4 Co-Op tractor that I am interested in buying. The owner says when it is shifted into gear the tractor doesn't move. He told me that the shaft that goes to the transmission turns and the brake drums spin. So what would the problem be? Is it cheap to fix? I kinda know that it is a "Oh yea" thing but I can not figure it out.
 
This is very interesting and I am anxiose to know what the correct answer is. In my experience since the transmission drives the pinion which turns the ring gear which drives the spider gears that drives the brake pinions, that you claim works. The only thing I can think of would be the bull gear drive teeth on the brake pinion, the bull gear teeth their self or the axels. I have seen in extreme cases each of these as a problem. At any rate I have all those parts here and there are several other places that will have them too. Not that hard to fix. If the price is right I wouldn't hesitate to buy it. Let us know what you find. Irv
 
Back in the 60s my FIL had a Cockshutt 40,darn good tractor. It had the normal steel splined axle and the cast iron hub. The splines in the hub got stripped out. Parked for a while, because the hub was hard to find.
 
I did not think of that at all. The hub key way could be stripped. I just hope that the transmission bull gears are not rounded off. A hub is easier to fix then the transmission itself.
 
Ok. That has the same set up as a Oliver 70. My uncle pulls a Oliver 70 and back when I was in middle school he pulled the 70 at a FFA pull and cracked the hub in half. So he got 2 hubs from another puller and they were off a Cockshutt tractor.
 
They may have been off of a Cockshutt 70!. Does the E-4 you are looking at have non adjustable rear wheels or does it have rowcrop axles.If you try to drive it, what happens when you put your foot on the brake and stop that brake from turning? Will it try to move? Try both brakes. You would hold one side and transfer the power to the other wheel.
 

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