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Discussion Starter #1 (Edited)
Does anyone know what the OEM thickness of the friction material, that is glued to the clutch ring, supposed to be? I recently opened up my clutch ring assembly and found it to no more then one millimeter thick. Is that thickness, all its supposed to be?
As you can see from the photos below, the planetary gear housing was fractured at each of the three bolt heads. That was an easy fix.
 

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That clutch lining looks fine. It was never very thick, about 1/2 mm sounds right.

I've never seen a clutch fail that way. I wonder if some kind of shock could do it? It seems more likely to be a manufacturing flaw.
 

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I too think it was a flaw from the beginning. The original main plate appeared to have been poured and machined for the mounting bolts. The replacement piece has more heft to itself.
I've reassembled the blower and tightened the slip clutch nut on the snow-blower's auger. This gravely is running smooth once again. A real pleasure to use.
 
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