Ok everyone, now I could use some help. I determined that the right-side bearing is failing using a stethoscope. I need to talk with someone who has replaced the bearings on a Heavy 10 UMD Cone Pulley shaft. I really want to save my perfectly good polymer drive belt. It looks like the job can be done in place. So far, I have:

• Pulled the motor drive belt.
• Dropped the motor/pulley shaft as far down as it will go. The motor hits the back of the stand casting.
• Removed the nut and lock nut from the right end of the shaft.
• Removed all six machine screws holding the retaining rings.
• Removed the cone pulley set screws.
• Cleaned the pully shaft, sprayed everything with Liquid Wrench

So, at the moment:

• The cone pulley is sort-of free on the shaft. Best guess is that there are burrs on the shaft where the set screws beat it up. They had loosened up, maybe because of the bearing failure/vibration, which is part of the reason I'm doing this.
• The bearing retaining rings are free.
• I have not been able to remove the collar from the right-hand end of the shaft.
• The left-side pulley (motor drive) taper pin is giving me a hard time. It's not out yet. If the shaft can be removed with the carrier in place, it will clear the UMD housing.
• Dead-blow persuasion on the left-side pulley is NOT moving the bearings. Again, I'm being gentle
• There is no way to get a dead-blow hammer on the right end with the motor still in place.

Replacing the belt is actually not a big, or expensive, deal. Now it's just the principle of the thing. Is what I'm trying to do possible? It looks like if I can figure out how to drive the shaft from right to left and pop the bearing out, this will work. Thoughts/experience?

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One thing for sure, when it goes back together, the six machine screws are going to be socket head cap screws.

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Don Verdiani

Outside Philadelphia, PA