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Bolens 800 Transmisson Repair

4824 Views 14 Replies 7 Participants Last post by  Frustrated Farmer
I have a Bolens Husky 800 tractor with a 3 speed transmission. The input shaft to the transmission needs to be replaceed. The keyway in the shaft has become worn down probably due to the jarring from plowing snow. I have tried a new key but it eventually slips. The tractor moves, stops, then moves again.
My question is how hard is it to replace the input shaft? I consider myself fairly good in mechanical aptitude. Do I need special tools? Would it be better to find a repair shop? Just wondering what I might be getting into. I have the Bolens manual but it only talks about putting the transmission together not disassembly.
Any advice would be appreciated.
Thank you
St. Joseph, Michigan
1 - 2 of 15 Posts
Any chance you can provide a picture of the worn out keyway? I've never seen that happen before.

Transmission work in these is pretty simple. I have found that it's much easier to remove the transmission and dissasemble it on a table. No special tools needed other than a set of snap ring pliers, which you may already have. You may actually have trouble finding a repair show willing to take this on as they tend to shy away from 50 year old machines.

You may also want to look around for a complete used axle. Around here, a 3 speed goes for about $50.

The $50 number comes from ones I have sold in the past. It's a shame you're not closer, I have 2 or 3 good ones in parts tractors. Your best bet is probably to keep an eye on craigslist, you might be able to grab a parts tractor or you might run across someone parting one out. I looked on CL near you and there was one parts tractor for $100 that had a 3 speed rear. The only downside is that it is the G-series 3 speed so there is no locking differential. here is a link to that ad:

Was the key broken off when you removed the drive coupler, or was it still in place? While the keyway is definitely worn out, I wonder if the stop/go/stop again issue is being caused by something else.

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