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Discussion Starter · #1 ·
I just did the detent springs in my Massey MF12 rearend and dad's Bolens 800 needs them. If the one shift rod for the other side moves at all you can't get it out of gear. The detents on both shift rods are not working. I would love to fix it before this coming weekend so it works for him at the plow day. I could swap the whole tranny with one of the spares but I don't know if they are identical.
 

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Discussion Starter · #3 ·
23, 22, 21, 20 maybe? There has got to be springs and balls for the detent spots on the shift rods to hold them in place.
 

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Discussion Starter · #5 ·
I was bound and determined to fix detent spring and balls on the transmission of dad's Bolens 800. We basically halved the tractor, took the top plate off and then took the frame clamps off and slid the tranny back enough to gain access to the set screw. Grabbed the one spare 3spd tranny and robbed the detent spring out of that one. Also used it as trial first to make sure I was going to be doing it right. Took the old one out of the 800 and sure enough it was in two pieces and coiled inside itself which made it about half it's normal length.

All in all it took about an hour and a half to do. She shifts perfectly now. I am going to write a little how to on it then when I get time. Here are the pics we took though.
 

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When I rebuilt mine I had taken the shift shafts out without even realizing there were those ball bearings and springs. I had to fish around with the magnet to get them. The only thing I didn't locate is that little pin that suppose to go inside the spring. One parts dealer wanted to sell me one for 13.00 and one parts dealer told me it wasn't necessary. I put it back together without it and it seems to be working fine, knock on wood!
 

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Discussion Starter · #8 ·
dadork said:
When I rebuilt mine I had taken the shift shafts out without even realizing there were those ball bearings and springs. I had to fish around with the magnet to get them. The only thing I didn't locate is that little pin that suppose to go inside the spring. One parts dealer wanted to sell me one for 13.00 and one parts dealer told me it wasn't necessary. I put it back together without it and it seems to be working fine, knock on wood!
I think the reason the pin is there is to keep both shift rods from being moved at the same time, or both being in between gears at the same time.
 

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I learned a little bit more today helping George work on the 800 tranny. He had some experience having done the tranny on his MF12. The little tractor shifts great and will be ready to do some plowing this coming weekend.
 

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Discussion Starter · #12 ·
It wasn't bad at all. There are some pluses and minus between doing the Bolens and doing the ones in the Massey. The Bolens is easier regarding taking the tranny half way off, the Massey was easier to replace the springs because you could do those each separately and on the work bench. With the Massey though you had to split the tranny case and have a new gasket. In the end I think they are about equivalent.
 
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