Possible cause of failure:
Wheel hub taper is showing wear and contact angle is slightly off.
#3 bearing is slightly scratchy.
Preload is light.
Clean, inspect overall dimensions.
Replace bearings and add wave spring or shim to stiffen the preload.
Kiss grind the od taper.
Adjust preload, balance, assemble and break in. Final quality control inspection.
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Catastrophic bearing failure was the main cause of this spindle malfunction
Continue reading to learn how Northland Tool performed this repair and converted a Weiss GHK 176239 spindle from grease-injected to permanent grease lubrication…