Disaster averted thanks to Big Iron

[SumpBuster]

Dealer at sled show tonight(Cat dealer) sat there telling me this doesnt happen with cats, only yam...LOL. Told me its cause the gears are larger on Cats so they dont have the issue. I argued with him then just gave up....lol

If cats don't have the issue, i think its cause those assembly line workers bleed green and not blue...lol

Dan

Sounds exactly like what my cat buddies would say!

 

[74Nitro]

Dealer at sled show tonight(Cat dealer) sat there telling me this doesnt happen with cats, only yam...LOL. Told me its cause the gears are larger on Cats so they dont have the issue. I argued with him then just gave up....lol

If cats don't have the issue, i think its cause those assembly line workers bleed green and not blue...lol

Dan

Larger gears as in 24/50?

 

[Turboflash]

Doesn't surprise me. All I can do is just shake my head. Shows how detached they are from the real world.

 

[ROCKERDAN]

One thing I will admit, when comparing the Winder chaincase(21/41) to Cat with larger gears(24/50) the tensioner is way way out on the winder where as the cat its way back to the right, and the bolt is barely lengthened. So there is likely less vibration which was the Cat dealers argument. I have been comparing pics....

Also the large 50 bottom gear will slap oil up and around alot better as it fills the case fully, and likely will show a higher level with LESS ounces.

I still believe that any tensioner even with loctite, will eventually give up. Just too harsh of environment for loctite to survive forever. Lots of lube and vibrations makes for a tough task on the loctite.

Dan


-------Winder - 21/41 --------------------------------------------------------------Cat - 24/50--------

 

[74Nitro]

But Dan,

One thing I will admit, when comparing the Winder chaincase(21/41) to Cat with larger gears(24/50) the tensioner is way way out on the winder where as the cat its way back to the right, and the bolt is barely lengthened. So there is likely less vibration which was the Cat dealers argument. I have been comparing pics....

Also the large 50 bottom gear will slap oil up and around alot better as it fills the case fully, and likely will show a higher level with LESS ounces.

I still believe that any tensioner even with loctite, will eventually give up. Just too harsh of environment for loctite to survive forever. Lots of lube and vibrations makes for a tough task on the loctite.

But Dan, mine had the large gears and still backed out.


-------Winder - 21/41 --------------------------------------------------------------Cat - 24/50--------
View attachment 150035

 

[cannondale27]

One thing I will admit, when comparing the Winder chaincase(21/41) to Cat with larger gears(24/50) the tensioner is way way out on the winder where as the cat its way back to the right, and the bolt is barely lengthened. So there is likely less vibration which was the Cat dealers argument. I have been comparing pics....

Also the large 50 bottom gear will slap oil up and around alot better as it fills the case fully, and likely will show a higher level with LESS ounces.

I still believe that any tensioner even with loctite, will eventually give up. Just too harsh of environment for loctite to survive forever. Lots of lube and vibrations makes for a tough task on the loctite.

Dan


-------Winder - 21/41 --------------------------------------------------------------Cat - 24/50--------
View attachment 150035

I agree. They did TWO mistakes at least on some of the early tensioners. Lack of Loctite and the bolt head bottoms in shaft before it tightens against tensioner sides it in. That allows the shaft to spin wearing the tensioner sides making it worse. Welding does stop all this if both sides are done since prevents bolts from coming out and shaft from spinning. I bought the new part # and both issues are corrected but have no idea what sleds the new ones are in or whether the Loctite is applied to all.

 

[Turboflash]

Yup, gotta make SURE the axle of the tensioner is held tight into bracket. I think the countersink was too shallow, causing the screw to bottom before pulling the axle up to the backside of the bracket.

 

[SumpBuster]

I agree. They did TWO mistakes at least on some of the early tensioners. Lack of Loctite and the bolt head bottoms in shaft before it tightens against tensioner sides it in. That allows the shaft to spin wearing the tensioner sides making it worse. Welding does stop all this if both sides are done since prevents bolts from coming out and shaft from spinning. I bought the new part # and both issues are corrected but have no idea what sleds the new ones are in or whether the Loctite is applied to all.

Yeah Big Irons 2017 was so tight he had to put one end held in a vise to loosen the other. My 18 had no evidence of loctite and both were loose. Both are now welded.

 

[SumpBuster]

What about new? 2018 mtx with 38 miles! Was hoping I didn’t have to do this to next year..........

I managed 2100 miles, but the oil was silverish looking. Bushing was sloppy, but

not horrible. This new oilite one was polished after pressing in and holes drilled through. Original had no holes drilled through, but not sure if that makes much difference. Plus it's wider..a little more support (grind down to gear width .960".)

 

[Spicoli]

Make sure everyone knows to do this simple fix. I know of two guys that destroyed their chain cases because of this. IT'S A NO BRAINER!!