Breaking clutches

[Teth-Air]

I had 2 clutches break off and am wondering if the 850 with it's bigger crank taper will make the clutches even weaker as to fit the P-85 on the hole will need to be larger and therefore there will be less meat left. My question is do you think this will make the clutches break more often? Or do you think the 800's had too many vibrations and this was the cause? One of mine was a 13 Pro-Ride and one waas a 16 AXYS that failed. The 13 was near the crank and the 16 was at the outer sheave.

 

[Sheetmetalfab]

I had 2 clutches break off and am wondering if the 850 with it's bigger crank taper will make the clutches even weaker as to fit the P-85 on the hole will need to be larger and therefore there will be less meat left. My question is do you think this will make the clutches break more often? Or do you think the 800's had too many vibrations and this was the cause? One of mine was a 13 Pro-Ride and one waas a 16 AXYS that failed. The 13 was near the crank and the 16 was at the outer sheave.

How many miles on each?

The clutches i’ve seen break off had worn bushings and zero maintenance.
(Both on dragon 800’s) around 2k miles.
Also both sleds had blown multiple belts over the years. (Typically out of phase after blowing a belt)

I think speculation on whether they will break easier would be a great keyboard exercise but have zero application to reality.
With the added mass in the crank reducing vibration and harmonics there could easily be better longevity and wear item life?
Or it could be a 900 rmk and spit belts and clutches left and right.

Polaris doesn’t even know until mass produced units hit the snow.
The prototypes are rumored to be smoother so that sounds encouraging.

 

[XCaSSAULT]

It’s not something I really hear or read of. Maybe your getting unlucky with getting out of balance p-85’s? Have u ever weighed your weights? Polaris weights or any manufact weights very .5 gram or even almost a full gram off from each other.

I’ve never dealed with adjustable weights but I imagine if ones not paying close attention I could have more weight on one then the other.

Both scenarios would cause problems in a hurry.

Some cat guys use the p-85 and have to have material milled out to make it fit. You don’t really hear of issues after.

I think a good balanced-aligned system should be trouble free for long time. wmo

 

[Teth-Air]

How many miles on each?

The clutches i’ve seen break off had worn bushings and zero maintenance.
(Both on dragon 800’s) around 2k miles.
Also both sleds had blown multiple belts over the years. (Typically out of phase after blowing a belt)

I think speculation on whether they will break easier would be a great keyboard exercise but have zero application to reality.
With the added mass in the crank reducing vibration and harmonics there could easily be better longevity and wear item life?
Or it could be a 900 rmk and spit belts and clutches left and right.

Polaris doesn’t even know until mass produced units hit the snow.
The prototypes are rumored to be smoother so that sounds encouraging.

Both had about 2000 kms on them but the AXYS clutch had 5 rides since rebuild. One thing to note though is the 13 broke when removing it and I did read that the new larger taper on the 19 is to make removal easier. Maybe Polaris has noticed they are hard to remove and this is causing failures? Just speculation though??

ps, I rarely have blown a belt since we have been gearing down.

 

[TRS]

I personally think they are breaking from stress associated from repeated removals using impact tools.
Impact tools are hard on clutches and cranks.

 

[tuneman]

I personally think they are breaking from stress associated from repeated removals using impact tools.
Impact tools are hard on clutches and cranks.

X2

Not mine, but I've experienced that first hand. Impact tools and clutches never get along.

 

[rkm]

I personally think they are breaking from stress associated from repeated removals using impact tools.
Impact tools are hard on clutches and cranks.

I would agree except Ive seen 6+ that I can guarantee the clutches never came off since being uncrated.

 

[Sheetmetalfab]

I would agree except Ive seen 6+ that I can guarantee the clutches never came off since being uncrated.

Same for the 2 i saw break.

Just worn out out of balance pos clutches.

 

[rkm]

The one that I had shoot out of the sidepanel and land twenty feet behind me was possibly out of balance but definitely not worn out.

 

[b-litt]

Is the crank typically toast when this happens? I've seen a few go on the Axys. All three got new motors.

 

[Teth-Air]

I personally think they are breaking from stress associated from repeated removals using impact tools.
Impact tools are hard on clutches and cranks.

These clutches never saw any impact tools for removal. Unless the dealer did it during a warranty event that I did not know about.

 

[Teth-Air]

Still nobody with insight into the new size taper for the 850 and how it will effect the clutch? Mountainhorse you here to give us your opinion?