kwired
Electron manager
- Location
- NE Nebraska
Little while back got a call for a crop drying fan not working. Though I fixed up some other shoddy things in the process, none of those were the cause of motor failure. An internal cooling fan on the motor shaft happened to decide to come off the shaft and ended up crashing into and damaging motor windings.
Not the first time I seen foreign material damage windings before but can't recall ever seeing such a fan come off the shaft without some external reason. I think welds simply gave up. I spread it open further than it was when I found it to get it past the bearing
Replacement motor was about $1200, a definite purpose type motor for the application with a "air over" rating of 5 to 7 HP. Which is common thing to have that sort of rating on this type of equipment.
Not that many years ago same motor was only maybe about $400.
You can see near bottom right some arcing damage where it contacted motor windings. Couple other burns as well but near bottom is most obvious.
Not the first time I seen foreign material damage windings before but can't recall ever seeing such a fan come off the shaft without some external reason. I think welds simply gave up. I spread it open further than it was when I found it to get it past the bearing
Replacement motor was about $1200, a definite purpose type motor for the application with a "air over" rating of 5 to 7 HP. Which is common thing to have that sort of rating on this type of equipment.
Not that many years ago same motor was only maybe about $400.
You can see near bottom right some arcing damage where it contacted motor windings. Couple other burns as well but near bottom is most obvious.