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Doo Floating secondary broke


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#1 russj

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Posted 31 December 2016 - 05:51 PM

Anyone else have a skidoo floating secondary break ? not really sure why but the shaft pulled out of the clutch. 

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2013 Gade X 800 Etec

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#2 Daag44

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Posted 31 December 2016 - 06:15 PM

I don't float the secondary, but I have heard of the problem. I prefer a solid setup with a proper alignment and engine stopper adjustment.



#3 russj

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Posted 31 December 2016 - 06:44 PM

I was wondering the same thing Daag44,,, I see how it was built and how it was broke,, it makes me see now why skidoo didn't float them to start with.


2013 Gade X 800 Etec

2000 MACH Z IMP800,
1998 MACH Z P/S820,


#4 russj

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Posted 01 January 2017 - 03:48 PM

are these floating kits only made for low hp machines? 


2013 Gade X 800 Etec

2000 MACH Z IMP800,
1998 MACH Z P/S820,


#5 mbret2004

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Posted 01 January 2017 - 04:29 PM

Maybe talk to doodoctor aka Brian. He makes a floating secondary and can most likely shed some more light on the issue. I'm not sure so I won't comment here.
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#6 aircop1

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Posted 01 January 2017 - 09:29 PM

DooDoctor is better built, been running his floating secondary for 3200 miles no problems. Have heard Doo floating secondary's have some issues breaking with any kind of power put thru it.

 

Russj that secondary half looks like it is pressed on the shaft, DooDoctor set up entire secondary floats on a spline.


Edited by aircop1, 01 January 2017 - 09:30 PM.


#7 russj

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Posted 02 January 2017 - 10:28 AM

heres a better pic, after i got it apart.

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2013 Gade X 800 Etec

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1998 MACH Z P/S820,


#8 Icanfixit

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Posted 02 January 2017 - 06:49 PM

Anything that is pressed on and is exsposed to rotational forces should have a form of locking mechanism keeping it from spinning off or moving!
I would have thought that set screws or equivalent would have saved this from possibly happening.

Thxs

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#9 zip27

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Posted 02 January 2017 - 09:30 PM

Fixed one that came off splines today on 2015 Xrs

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#10 Djetski225

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Posted 02 January 2017 - 09:41 PM

Anything that is pressed on and is exsposed to rotational forces should have a form of locking mechanism keeping it from spinning off or moving!
I would have thought that set screws or equivalent would have saved this from possibly happening.

Thxs


A proper interference fit is much stronger than any sort of mechanical locking device. We have equipment at work that is over 2,000hp and the shaft coupling hub is only installed with an interference fit. Need to heat the hub to nearly 450F and ice the shaft to install.

With that being said, the interference needs to be correct. If it is not enough, you will have failures like this. Rule of thumb is .002 to .003 per inch of shaft diameter. I'm guessing that the aluminum secondary will also determine how much interference is needed.

#11 Icanfixit

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Posted 02 January 2017 - 10:18 PM

A proper interference fit is much stronger than any sort of mechanical locking device. We have equipment at work that is over 2,000hp and the shaft coupling hub is only installed with an interference fit. Need to heat the hub to nearly 450F and ice the shaft to install.
With that being said, the interference needs to be correct. If it is not enough, you will have failures like this. Rule of thumb is .002 to .003 per inch of shaft diameter. I'm guessing that the aluminum secondary will also determine how much interference is needed.

My remarks was not to challenge wether or not a pressed on or an interference fit assembly was good or not! But rather a set screw stops the shaft and or coupling from spining directionaly when a failure does happen.

My humble opinion here, BRP should have a good look at this. This is not right! As this seems to be a very big safety issue! Do we have a BRP rep here to forward this too?

Thxs

Edited by Icanfixit, 02 January 2017 - 10:20 PM.

Only when you challenge knowledge, do you truely begin to learn.
One's own thought is merely wasted if not acted upon.
Excuses never solve them selves.

 


#12 Djetski225

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Posted 02 January 2017 - 10:42 PM

My remarks was not to challenge wether or not a pressed on or an interference fit assembly was good or not! But rather a set screw stops the shaft and or coupling from spining directionaly when a failure does happen.

My humble opinion here, BRP should have a good look at this. This is not right! As this seems to be a very big safety issue! Do we have a BRP rep here to forward this too?

Thxs


Agree completely. The reason this failed was most likely an error on Doo during the design or assembly.

#13 nelson_flavour

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Posted 02 January 2017 - 10:56 PM

Same failure last season



#14 skidooguy600

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Posted 04 January 2017 - 07:44 PM

Same failure last year after less than 500miles called Brian he sent me a new one! Now have 500 on it and no issues so far

#15 Doodoctor

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Posted 08 January 2017 - 03:30 PM

Doo had a few of these fail, most where built in 2011 and 2012 . They warrantied every one.. I've seen only about 6 or so.






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