Hisun Tactic HS800-2, mid shaft removal is it possible?

[Mel4321]

Hello People-

 I'm working on a 2015 Tactic 800. I need to get at the mid shaft diff to replace the key on the output shaft, under the Y output crown gear. Has anybody been in there? I was hoping to remove the housing without pulling the tranny. I've pulled the tranny before and it was a bear to get out & in. That part of the tranny with just a 1/4" x 1" key stock seems a little week to me, is there anything I can do to beef it up?

Any help would be appreciated!!  

[Mech]

Every part will come out. If it's part 14 you want out then it looks to me like a full strip down most likely. Never worked on one though.

If it's part 7 then I'd imagine you'll have to move one of the cases(a diff ?), from the end of it enough to let the shaft pull off it's splines.

Parts 24, 29, 31 and 33 are all called Yokes. universal yokes..  I take it that's the part you want to access ?

It's possible that the key is made weak on purpose, to save damage to other parts.. It might be designed to shear before anything else breaks. Key steel is quite soft, it you want to make it stronger you could use a harder/hardened key. I wouldn't recommend that though.. 

[Mel4321]

Thanx Mech-

Yes its 14 & 37 I want, I've seen a shear key in a lawn mower but on a ATV? I've got it down to the case now but the case is giving me a hard time coming loose. It looks like it should come. I'll find some way to part the case tomorrow.  Do the other two diffs have the same type of sheer key? If so I think I want to put something harder on the mid shaft or maybe another key way machined in to have two keys instead of one & rely on the front & rear diffs to shear under lode, both of them are a lot easier to mess with.

 

Thanx again Mech I'll let you know how things go.

Mel-

[Mech]

I don't know anything about those things.. 

It sounds like you are on top of it.

I suppose you have the service manual ?  That should show you most stuff.. with a bit of comparing with the bike to understand it.

[Mel4321]

Update, People-

Turns out you cannot pull the side case or midshaft out without moving the tranny forward off the insert that aligns the two cases. If you have to do that then you might as well pull the tranny & work on it on the bench. So I did and this might be the wrong thing to do but being that I have put two keys in so far. I just welded the Crown Gear to the Mid Shaft and now it will never spin again!!! Not recommending anybody do that but it's working great for me. I'm plowing snow again and I'm happy and the wife is happy, she can get out and go shopping and spend money.

 

See Ya Next Time-

Out For Now, Mel-