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Old 09-07-2006, 06:51 PM   #1
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Default clutch bearing problems

I'm experiencing problems with clutch bell bearings exploding. I've tried all different kinds of bearings and clutches, and the only clutches that are working well are the Fioronis. I'm running a Nova P5 in my MBX5 and a Top 528x in my MBX5T- both vehicles are experiencing the same issues. Sometimes the bearings last a little longer than others, but today I ran 3 tanks through my truggy and smoked a set. Some guys I talk to get almost 2 gallons through a set, I'm lucky to get a full main in before they blow. I've tried shimming differently and even had 2 other people set it all up for me. All with the same problems.

Any imput you can suggest would be much appreciated.
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Old 09-07-2006, 06:55 PM   #2
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buy better bearings. get some from bocabearings.com

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Old 09-07-2006, 07:02 PM   #3
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tried them. People tell me that Amains are good but I haven't tried those yet.
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Old 09-07-2006, 07:10 PM   #4
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idk maby try the ceramics from boca. thats all i can think of.

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Old 09-07-2006, 07:45 PM   #5
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If you can get a brace that wil stiffen up the centre section of the chassis get it. You definately could be overheating them as well. If your using half throttle a lot that can make the clutch slip tons and create super high temps. Also try setting your gear mesh a bit more on loose side, then you can get more flex out of that area before the clutch bell binds up with the spur gear and exerts tons of pressure on the bearings.
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Old 09-07-2006, 07:48 PM   #6
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tried some different types of homeade chassis braces trying to rule out flex and still had problems
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Old 09-07-2006, 07:51 PM   #7
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Its possible you could have bad bearings on your diff, or an out of round spur gear or clutch bell, or a warped diff case.
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Old 09-07-2006, 07:54 PM   #8
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pretty sure that's not it. two different vehicles one of which I just put together yesterday and only ran three tanks through the chassis
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Old 09-07-2006, 07:59 PM   #9
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this may soind odd but change your engine bearings. a friend had the same problem but not as bad(got about 10 runs) turns out one of the bearings that supports the crank had locked up and was causing major heat.

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Old 09-07-2006, 08:08 PM   #10
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we thought about that especially with the P5 but it's doing it in the 528 and I still have problems rolling it on the box it's so new.
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Old 09-07-2006, 08:14 PM   #11
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Just run the Fiorni clutch then, they work really well anyways. Way nicer than the regular 3 shoe aluminums.
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Old 09-07-2006, 08:26 PM   #12
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yeah that's what I'm running on both and I like them so far, they wear really well, just having issues with the bearings
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Old 09-07-2006, 09:06 PM   #13
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This guy keeps his stuff perfect just so guys know it's not a maintenance issue. The home-made chassis braces he talked of earlier are nice pieces straight off the lathe.

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Old 09-07-2006, 09:19 PM   #14
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do you hapen to have a CNC machine? i need to get a motor mount machined

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Old 09-07-2006, 10:10 PM   #15
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My guess is you are not setting/shiming your end play on the clutch bell loose enough. It should be about .40mm of slop, if it is less than that, that might be your problem. It is not happening on the Fiorni's probably because they tend to not generate and much heat as other clutches. They are also one of my favorites.
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