Excess motor vibration can cause downtime even if the motor itself has not (yet) failed due to this cause. For example, the motor drives a conveyor. The vibration from the motor transfers to the conveyor, and causes fasteners to prematurely fail. Rollers go askew, and the line stops.
Adjusting the rollers seems to fix the problem, but it does so only temporarily. Often, the tech solves the wrong problem. What you need to solve is the cause of the loosening rollers. And a very likely c