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Brake locked up on trail

Thanks for the suggestions. The sled is back home and thawing out before I take a closer look at it. In the end I was able to borrow an aluminum skimmer that fit under the track and the sled was towed out backwards. It worked well enough but with so many willows on this really overgrown trail there were lots of opportunities for it to snag.

Now the hard and probably expensive part of trying to figure out what is going on. Any idea as to what could cause a track to just randomly lock up like it did?
 

I would think that something went wrong in chain case.
 
After letting it thaw out I started it again and gave another attempt at moving it on the off chance that something was just frozen up. No luck. Not surprised.

Tomorrow I hope to get the back end jacked up, remove the belt and see if the track will move at all when rotating the secondary clutch. I don't think it will though with the belt on there is a bit of movement when I turn it.

Question: I noticed that there was also some lateral movement on the secondary clutch....maybe a 1/4" or less. I know that some movement is normal with other sleds but since I'm still getting to know this one, does that sound right for yours?
 
Yep, sounds about right. I don't have an actual number but it may look odd for anyone not used to it. It should be in the manual available for download.
 
Yeah, seems the problem is definitely in my chain case. When it started thawing out some oil started to drip from there. I haven't had much time this week but hoping to open up the chain case today to get a look inside and assess the damage.
 
The leak seems to be just coming from the drive shaft on the back side of the chain case. Could it just be a bearing that is causing the leak chain case oil?
 
There is an oil seal (6) as well as two o-rings on the driveshaft (5 & 7). The seal on the bearing itself is not designed to hold in oil.

I sure hope it didn't run dry.
 

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Thanks.

No it didn't run dry. It's a really slow leak that I only really noticed after it's been sitting in the shop all week. The chain case oil is a bit low but far from dry.

I guess this still doesn't really explain exactly why the track won't turn though.
 
So, any news?
 
I've been away for a while enjoying Rendezvous celebrations in the big city of Whitehorse so haven't really put anymore time in. Basically though I can't get the chaincase cover off. I've taken all the bolts out even took out the chain tension bolt but it just doesn't want to pop off. In my experience this should not be a problem. Not sure how rough I want to get with it.

It is possible that if this is the first time the cover has come off since new but could there be silicon or something else on the gasket that might make it extra sticky?
 
From the factory, it was installed dry so it should come right off. Might need a little persuasion with a little prying but it shouldn't take too much. If the previous owner added a sealer of some kind, you might have to pry harder but it should still come off but I'd be worried as to why this was done. The gasket can usually be reused.
 


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