850 gone down already??

[indydan]

Wax

How many hours / miles .

78 miles on this one

The one we are doing today is a customers......He has had his fill of Polaris warranties
on new model releases.

He said he would rather just pay so he could get back on the snow quickly.

We will have his motor done by tomorrow and it got here last night.

He has purchased 6 new Polaris motors from us in the past 4 year.

He has a lot of sleds, and Love the Polaris sleds... he just hates Polaris as a company.

He says they are the most arrogant bunch of pricks he has ever dealt with.

Which is good for Indy Specialty......and all the guys that work here.

He has 3 - 850's ... 2 still run we are doing the cranks on the other two after Christmas.

He never asked for a price.... you gotta feel bad for the guy.

And we will give him a deal for being such a great customer and being first to get the bearing fix.

Dan

 

[yamikilr]

No matter how many people tell me the world is flat, I will not believe them.


Let's get this thread back on track. If Addie and Dan want to have a slugfest we can start a new thread.

We are waiting for the OP to report his personal findings. Back to topic....

Do you not know what pays the bills at Snowest?

 

[greasemonkey3406]

With all of the testing that supposedly went on with this motor, how come this never clicked with anyone before? With such a low mile failure, shouldnt this have already shown up on some of the test sleds?

 

[Sheetmetalfab]

850 Blown Up Already??

I’m Feeling slightly better about not snowchecking this year.......



The dragon cartoon is spot on......

 

[ADDIE]

Click on picture attachments below


And here is what is happening to the 850 PTO bearings

Look close at the pictures and you can see where the PTO bearing moves inward until the Outside diameter hits the spinning crankshaft PTO wheel
and then locks the motor.

If all the 850's have a float PTO bearing which they most likely all do it will be a 100% full recall.



Dan

That looks to be an issue that might be across the board.

 

[05rmksteve]

The 800 pros and axys did not have a lock ring on the PTO bearing.

 

[live2beel]

Originally Posted by indydan View Post

Mark my word the 850 is a GREAT motor.....


Dan

How can you possibly say this if you need to split the cases and re-hone the cylinders to make it live? If everything your saying is in true a fact, this could be Polaris's biggest nightmare

 

[indydan]

The 800 pros and axys did not have a lock ring on the PTO bearing.

Corrrect..............but the 800's have a PTO bearing with an inner race.

That has .0015 to .002 interference fit.

The 850 has no inner race on the bearing..... the rollers ride on the crank snout.

The bearing floats...........and when i says floats i mean floats.

Look at my pictures of the PTO bearing... you see there is no an inner race ?

Dan

 

[volcano buster]

Would a spacer between the small inner race and the crank help keep the bearing from migrating over too far? Or would this side load the other crank bearings?

I realize the machining and ring are the better option.

 

[jptbay]

O.P. Update...

UPDATE: motor is pulled and torn apart. Everything inside the motor is perfect......except center bearing on crankshaft is seized and does not turn. New engine on order.

 

[indydan]

Would a spacer between the small inner race and the crank help keep the bearing from migrating over too far? Or would this side load the other crank bearings?

I realize the machining and ring are the better option.

We considered that..... but the bearing as a plastic roller retainer.

And really...... a spacer would be rubbing on the plastic at a slightly different speed so my guess is that would be a shaky deal.

Its not off the table yet........but i sure do not have to guts to try it without a few years of testing it.

The lock ring is tried and proven on many many motors.

Dan

 

[snowmobiler]

poo buzzkill

 

[indydan]

O.P. Update...

Center bearing...........i was not exspecting that.

Dan

 

[i'llDooit]

So if your a 850 owner, head out to the hills and tape it to the bars.

 

[greasemonkey3406]

So if your a 850 owner, head out to the hills and tape it to the bars.

Thats the plan.

 

[summ8rmk]

Center bearing...........i was not exspecting that.



Dan

One local sled seized the center bearing at 5miles.
I have heard of others, i believe It warrants an investigation.

 

[Sheetmetalfab]

So if your a 850 owner, head out to the hills and tape it to the bars.

But don’t play on the backside of any climbs you cannot tow over.

 

[CATDIESELPOWER]

I got the big red thumb, bad rep for asking Addie to reply to my question.
It was from username indydansucks. What a dick! Maybe a mod should check into that. Shouldn’t be able to have a username that is degrading or slanders somebody. Especially someone as knowledgeable as Dan that is just trying to get some real info out to us. I, for one, appreciate all the time Indydan has taken to contribute info on this forum. Thanks Dan!

 

[DITCHBANGER]

Die hard polaris riders should be thankfull Dan is on here giving out info that he doesnt have to, he could easily sit back and not say anything and not have to try and defend his experience. Looks like polaris 850's are in for some trouble with a crank bearing like that. Will end up costing alot either way through recall or new engines once they fail.

 

[jptbay]

Center bearing...........i was not exspecting that.

Dan

Total hearsay, but I have read about mis-applied sealant on the case halves plugging oil line. Some problem with robo sealer at factory.