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Snow Trac Variator question.

300 H and H

300 H and H

Bronze Member
Should the springs in the middle of the variator, that control sheeve clamping preasure and belt tension be preloaded at the same installed height? (these are dual nested springs in the pack) They are supposed to be staked to keep them in place? The upper set does the right hand sheeve set the bottom set does the right hand sheeve set....

This is when everything is centered, machine going straight. Mine are 0.15" apart, the drivers side (upper spring pack) being loose. When turning to the left this sheeve is opening and the belt is moving down into the sheeves, with less contact area than in the straight forward postition. Since the preasure from the spring pack for this side is loose, maybe this is why my machine is less agressive when turning left than when you are going right?

So with out changing the belt tensioning nuts, I tightened the lower pair of nuts under the dual spring pack to get it to the same installed height as the lower set, for the passenger side sheeves.

Did I do the right thing? It's not in the book at all, but seems to be very logical they should be equally compressed. And it may explain why my St wasn't turning as well to the left....

Thanks in advance, I do appreciate it!:biggrin:

Kirk
 
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The upper set of springs does the left hand sheeve set, as above I said the right hand twice for both sets...Sorry, I cann't edit the original anymore.

Regards, Kirk
 
Teledawg

I understand the drawing, but the distances are not the same as the frame the springs sit in are different. What I am wondering is if the pre loaded preasure or height of each spring pack irrespective of their location should be the same. In the diagram shown, it doesn't show a dimention for spring height. But it does suggest they are the same because they are both turned to coil bind, then backed off the same amount.

I have no idea who has worked on this unit in the past. I wonder if they might have loosened the top lower nuts, thinking they were doing the bottom belt tightener, tighning the belt?. I know the book warns not to do this. That is why I think some one may have......

No snow yet to try it on......

Best regards,
Kirk
 
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I would suggest setting the spring preload and eyebolt adjustments to spec per the diagram and then do a "recenter" adjustment. Then test drive it on snow when you get some. We already got 2' here and more to come over the weekend.
 
I just turn it untill both of the springs had some pressure. Then ping the nut .You don't want those to come loose. You can center your wheel and adjust the belt after it is together.
if one spring is broken or noticeably weak I have two sets . The inners and the outside ones .
Jim
 
Jim,

quote;I just turn it untill both of the springs had some pressure.

Did you mean to type "same" instead of some?

Could you email me info regarding where and who you purchased your bronze drivers from.... I really would appreciate that, thanks!

Regards, Kirk
 
i have seen the eye bolts break when that happens you can turn till you are blue in the face and you will have no effect
 
i was under the assumption that those spring act like a cushion for the steering. Usually they don't need adjusting and usually don't go bad. I just tightened mine down so the were not loose.
The new ones on my shelf have were made in canada and ordered from gittspring.com but .Expect to pay $50 each.
Jim
 
Good news,

My ST now turns each way just the same. As I had suspected, the upper spring pack should have the same installed height as the lower pack does. This does not fly in the face of teledawg's post, as it has to do with the adjustment proceedure of taking the spring to coil bind then backing of each a specified amount. As far as recentering the steering wheel, in my case it may have changed it by 1/4 turn or less on the steering wheel. Not enough to affect anything, or need to recenter.

Anyone who has this problem with thier machines should measure each and adjust them so they are the same height/tension

Regards, Kirk
 
you also have to remember that those springs will take a memory so teladog's procedure may be the best your idea is great for a field fix
 
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