bcpowder84
New member
I had a 2013 Cat that was exploding belts into a million pieces, without any real signs of wear before they blew. Clutches were hot after long pulls, but not out of this world. Heat would generate in the belt more than the sheaves. These two things happening generally point to an alignment and or offset problem. Heat from slippage will generally de-laminate a belt, and generate huge heat in the sheaves, but doesn't usually explode them without significant signs of wear first. i fixed my cat belt issues first by correcting the offset, and a slight adjustment to the parallelism of the primary and secondary.
I now have a new 850, and i have blown 3 belts in 400 km. I am very diligent in keeping my clutch compartment clean, heat cycling belts for break in, and generally keeping a close eye on the health of my clutches and belts. BRP has told me that there is nothing they can find wrong with my sled, so i took it upon myself to get a hold of the service manual do so simple checks my self.
As it turns out, my offset is out of spec (secondary is too far out by 2.1mm, My x dim = 43.2mm, spec = 41.1, +/- 1.8mm), and the parallelism is only +1.4mm across the primary (skidoo specs the parallelism at 0 load to be at +3mm +/- .93mm across the primary to account for twist under full load). I have posted some pictures of the spec from the manual, and my sled's measurements in here for the rest of you to see. Currently I am unaware of a way to adjust the offset by shifting the secondary further in on the jackshaft as mine requires; however, I have seen shim kits to bring it out. BRP needs to address this issue and the only way to force them to do that is to put the spot light on it. I encourage all of you that are having issues as described above to check this spec on your own. Please add to this thread if you find out that your sled is also out of spec.
For a simple video on how to measure this spec check this video out. https://www.youtube.com/watch?v=FAHiyqZ1J98
X =
Y=
Blown Belt Problems clutch Issues Ski doo 850 E-tec etec E tec Skidoo Ski-doo clutching
I now have a new 850, and i have blown 3 belts in 400 km. I am very diligent in keeping my clutch compartment clean, heat cycling belts for break in, and generally keeping a close eye on the health of my clutches and belts. BRP has told me that there is nothing they can find wrong with my sled, so i took it upon myself to get a hold of the service manual do so simple checks my self.
As it turns out, my offset is out of spec (secondary is too far out by 2.1mm, My x dim = 43.2mm, spec = 41.1, +/- 1.8mm), and the parallelism is only +1.4mm across the primary (skidoo specs the parallelism at 0 load to be at +3mm +/- .93mm across the primary to account for twist under full load). I have posted some pictures of the spec from the manual, and my sled's measurements in here for the rest of you to see. Currently I am unaware of a way to adjust the offset by shifting the secondary further in on the jackshaft as mine requires; however, I have seen shim kits to bring it out. BRP needs to address this issue and the only way to force them to do that is to put the spot light on it. I encourage all of you that are having issues as described above to check this spec on your own. Please add to this thread if you find out that your sled is also out of spec.
For a simple video on how to measure this spec check this video out. https://www.youtube.com/watch?v=FAHiyqZ1J98
X =
Y=
Blown Belt Problems clutch Issues Ski doo 850 E-tec etec E tec Skidoo Ski-doo clutching
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