Broke busted Rear Ohlins. Been done before?

[sledneck22]

So this is what happens to the ohlins? I thought the w-arm was supposed to be the weak point? Now what? Different skid? Replace shock? Anyone that can fix these ohlins? Any advice or help would be appreciated.

 

[raginyamaha]

call bruce at pioneer perf. site sponsor and knows his shocks. Or call carver perf and ask if shaft can be replaced.

 

[kinger]

Blowjett on here can fix her up I'm sure.

 

[sledneck22]

pictures

Here are the pictures of the shock...

 

[sherlock29]

do tell what you did to your Ohlins.?? How big was the jump?

 

[sledneck22]

I really honestly wish I hit a jump that would do this. I was just riding if fields and pastures with a lot of snow and drifts. That's what the kicker is right now... How in the hell did this happen? Be different if I knew exactly where this happened. But I don't. If I only had a story where I landed a 15ft jump or something over the crest of a hill to explain it... But again, I don't. Urghhh.

 

[AKrider]

Check the linkage between the front and rear arms. Looks to me like something bound up causing the shock to become bent.

 

[Snowmobileaddict]

Too much preload cause a coil-bind?

I can't tell from the photos, but it looks like there is a significant amount of preload set there.

If you preload the spring to less than 262mm or 10.3" when sled is off the ground as it can coil bind and cause damage.

 

[Essarex]

sledneck, how did you know it was bent? did you tip the sled on its side and notice it while looking at something else, or did the suspension start acting weird? the reason I ask is that when you describe the riding conditions, it appears that you did not notice any particular hazard that you hit, so that is why I wonder what clued you in on the damage.

 

[sledneck22]

When I had the skid out to check the w-arm, grease all wheels, and paint, I reassembled using the picture from the parts finche or whatever it is called. Everything was assembled correctly and in working order. Everything bolted up into the frame like normal. Everything compressed correctly. From talking to Bruce at PP a little I think it is the actual valve body that took broke. I actually think that the shaft might still be fine.

 

[sledneck22]

What clued me into the damage was when I put the sled back onto the trailer and went to ratchet strap the rear of the sled down and it didn't compress like normal. Looked underneath and the she was all crinkled up. Throughout the day I did keep checking my wheels in the skid to make sure everything was still tight so I dont' think I rode too long with it broke otherwise I would have seen it while checking my wheels.

 

[Essarex]

Hmm, maybe there is ice in the shock internals that caused it to stop moving which resulted in the bent body. I think coil bind would not bend anything between the spring's ends. This is strnge becaue an olins will last a long time between rebuilds in terms of water entry.

 

[dubla92]

I have seen this happen before. I have repaired lots of Ohlins monoshocks. I have seen this exact failure happen. Both were on 06 GT's and it is because the dampening and spring rates are way to soft. 07 Attack GT valving/spring was updated(stiffer) and then all 08s were changed. Lots of guys installed stiffer springs but did not change the valving. This lack of proper valving/spring combo causes the shock to get pounded out fast. I would bet that the shock leaked oil out prior and you may not have noticed.Then the shock pogo's and wears the body and pounds the seal head. and the circlip lets go and on and on. Ohlins sells shafts, rebound rods, and bodies. I am in Canada but if you want to stay in the USA I would call Carver or Pioneer as mentioned before.

 

[Soldier'spapa]

I would compare the cost of switching to a Mega Float vs repairing the Ohlins.

 

[bjowett]

dubla92 nailed this one. The 06 GT valving can't handle much, and they get pounded out, literally.

I could rebuild and add PDS (click the link below) to that shock for less than a Mega Float costs. Much of what appears damaged is replaced by the conversion parts.