This data comes from VSMA database and personal infield experience:

Topics will be varied:

TROUBLE:
Bearing Failures

PROBABLE CAUSE:
Arching through the bearing during weldingwith improper ground

POSSIBLE REMEDY:
Always ground properly and "YOU MUST GROUND CLOSE to your work" IF you do not, you will flash the bearings and result in premature bearing failure.

TROUBLE:
Bearing Failures

PROBABLE CAUSE:
Normal Fatigue Failure

POSSIBLE SOLUTION:
Replace bearing according to manufacturer's assembly instructions

TROUBLE:
Bearing Failures

PROBABLE CAUSE:
Overloading, excessive stroke or speed combination

POSSIBLE SOLUTION:
Return vibrating screen to original operating mode and replace bearing.

TROUBLE:
Bearing Failures

PROBABLE CAUSE:
Overheating from lack of lubricant, excessive lubricant, high ambient temperature or incorrect lubricant

POSSIBLE REMEDY:
Check MFR specs and install correct lubricant for corresponding ambient temperature, fill to "correct" oil level in sight gauge (do not overfill) as this creates excessive heat and breaks down protective quality of lubricant, replace bearing and use proper lubricant.

Lots more to follow later. Got a specific question? Go for it.

Regards, GEORGE BAKER, MODERATOR