I've pulled and replaced several furnace fans. It can be a real nightmare to
get the blower wheel off the shaft, and get it back in. There is very
limited space, and it's real easy to bind the blower wheel on the housing.
Some blower motors have a couple long "straws" which allow you to add some
oil without tearing it all apart. Be sure to use the correct oil for
electric motors. The wrong oil is far worse than useless.
I remember the time about ten years ago, the blower fan in my trailer
started to squeal. Near to drove me out of the house. Good squirt of oil,
and it was fine. This at about 11 PM one night.
Christopher A. Young
This space intentionally left blank
Click to see the full signature.