See if the pulley rocks back and forth enough that it makes the clutch drag, is so that needs fixed.

To adjust clutch clearance, loosen the center clutch nut a few turns and use a clutch plate puller to pull the plate back a bit over spec then use the center nut to pull it to spec. There is a clearance spec for the plate that I don't recall now.

I do know that 0.030" is too much for a Sanden compressor on a Mercedes powered Sterling truck. ( The clutch wore, increased the gap, clutch would not engage, driver pushed on it with a stick, clutch slippage created much heat, bearing locked up. )

If you need to replace the bearing and end up with a made in china bearing, consider cleaning out the Yack fat grease and using something more reliable. Do not fill more than 50 % or so, too much will create drag, heat and failed grease.