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I have a 2005 M7. The primary clutch hits real hard at engagement. I know about the excessive belt to sheave clearance of the Cats but have not seen any feedback about affects on the actual clutch performance with the Thunder products ABC kit.
If I re-shimmed my spider to a more normal spec (as I would like to do) and put on a new belt that would close up the gap for smooth engagement and also would cause the belt to ride up higher on the primary and potentially increase top speed (though that is not a major concern of mine) but I am a little concerned about damaging the spider:
[FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif]To get spider off you need to heat with oxy acetylene to get heat rapid and hot to break loctite as they are loctited on from factory. Once heated then you need to use a grunt tool that is about 2 1/2 feet long from Cat to spin spider off as it is threated on. Do not heat with propane as not rapid and hot enough it will just damage clutch/bushings from over heating to long. (from another post)[/FONT][/FONT]
[FONT=Arial, Helvetica, sans-serif]If I bought the $120 abc bolt with the collar, I could run the old belts and adjust the sheave in to close the gap so performance should probably be the same after engagement and reduce the slamming of the belt, but what about the weight to roller gap increase?[/FONT]
[FONT=Arial, Helvetica, sans-serif]When I bought the sled the belt was sticking up out of the secondary (like it's supposed to) and now it is just below the top edge. I am considering getting a wider than stock gates high performance belt that is 1.469 compared to the stock 1.439 so that would close up the gap by .030 plus the almost .040 of the worn belt for a total of .070 which would leave .030 gap..........so I don't know, what do you guys think?[/FONT]
If I re-shimmed my spider to a more normal spec (as I would like to do) and put on a new belt that would close up the gap for smooth engagement and also would cause the belt to ride up higher on the primary and potentially increase top speed (though that is not a major concern of mine) but I am a little concerned about damaging the spider:
[FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif]To get spider off you need to heat with oxy acetylene to get heat rapid and hot to break loctite as they are loctited on from factory. Once heated then you need to use a grunt tool that is about 2 1/2 feet long from Cat to spin spider off as it is threated on. Do not heat with propane as not rapid and hot enough it will just damage clutch/bushings from over heating to long. (from another post)[/FONT][/FONT]
[FONT=Arial, Helvetica, sans-serif]If I bought the $120 abc bolt with the collar, I could run the old belts and adjust the sheave in to close the gap so performance should probably be the same after engagement and reduce the slamming of the belt, but what about the weight to roller gap increase?[/FONT]
[FONT=Arial, Helvetica, sans-serif]When I bought the sled the belt was sticking up out of the secondary (like it's supposed to) and now it is just below the top edge. I am considering getting a wider than stock gates high performance belt that is 1.469 compared to the stock 1.439 so that would close up the gap by .030 plus the almost .040 of the worn belt for a total of .070 which would leave .030 gap..........so I don't know, what do you guys think?[/FONT]