Saturday, May 27, 2023

1986 John Deere 650 Tractor Transmission Repairs

I got this tractor kind of in pieces. The front and back halves of the tractor were bolted together when I bought it but that was only to help with moving it around. The tractor had to be split apart to put the transmission back together after someone had pulled it apart and abandoned it. This first photo is the tractor shored up in preparation for the split. I figured the front half was rear-heavy but I put the ladder and blocking there just in case I was wrong. Turns out I was correct, it was heavier to the rear of the front axle.

There are two long studs in the front case to help with getting the two halves apart and back together. This next photo shows the rear half moved a few inches back.

All apart and ready for transmission assembly.

This next photo is of the repaired shift fork. It's for 1st/Rev. The previous owner said that this and the non-operational starter were the only issues with the tractor. Mm-hmm.

I didn't get any photos of the assembly process. It was basically putting the repaired 1st/Rev shift fork back in, which meant other shafts and shift forks had to come out for the one fork to fit back in place, then put everything together, and fit the front bearing retainer plate back on. That was a huge chore. But I was very fortunate that no major parts were missing. One retainer plate bolt was missing (bottom left in the photo, the shiny silver one).

The tractor is all back together and filled with transmission/hydraulic system fluid. The bucket and 3  point hitch both worked smoothly and with no drama (and no leaks that I noticed), and I tried the transmission a tiny bit (a car is in front of the tractor at the moment - maybe tomorrow I'll move it so I can get the tractor outside). In the photo below, the front tires of the tractor are being held off the ground by the bucket. Buying a tractor non-running and in pieces is quite a big risk, as there's no way to know if anything works until it's all back together and running.


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