GUESSING often works FINE, skipping detectors saves time on minor jobs without issue.

My buddy had a similar thing with a conveyor motor last spring, where they kept realigning it but the vibration kept coming back. Turns out the concrete pad had cracked and was settling unevenly, so like @riley_miller25 said, the root cause was totally missed. They ended up having to pour a new foundation section before any alignment would stick. I mean, it's crazy how often we jump to tweaking without checking the basics, idk.