[TenTec] Hercules II fan noise
Rohre at arlut.utexas.edu
Wed Nov 21 14:33:24 EST 2018
Hints on cooling fan noises applicable to most fans.
If it is an older fan, unplug power and try a spin test by hand/ finger.
If you have bad bearing, you may hear clik, clik at the bad spot.
If you finger spin the prop and it runs and coasts awhile, it may only
need lubrication. I use TRI FLOW, as a good compromise.
On computer (Muffin) type fans, you can use a needle Oiler to pump some
oil into the bearing thru the label covering the end of the shaft.
A LITTLE goes a long way; you don't want it slinging oil while running.
Repeat the spin test, followed by a run test on AC power. All of the
fans I treated are still good months or a year later.
If no joy, fans are pretty common. Mouser Electronics has a broad
selection. (I always buy the ball bearing fan for a long lasting fix.)
Same blade count and mounting should be used to match the original fan.
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