How far should the friction disc be seated inside the drive pulley hub?

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How far should the friction disc be seated inside the drive pulley hub?

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06-17-2026, 11:28 AM

three4rd

Senior Member

Join Date: Jun 2011

Location: PA

Posts: 413

How far should the friction disc be seated inside the drive pulley hub?

On my 129, I had to get new set screws for the disc. It seems that if I push the disc in so that the complete thickness of the disc is inside the hub, the set screws will wind up tightening against the eccentric collar rather than the bearing. Shouldn't it tighten against the bearing? A quick search came across this older thread. I'm going to go with the pictures that show the teeth inside the hub but not all the way in as suggested in the manual. I see there are some sort of springs that are part of the whole pto clutch assy. If there were originally springs on there, they've been gone for decades!!

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