[GreenKeys] M33 Motor fan...

[teletypeparts at comcast.net]

Brad, 

This is good advice. 

Wayne 

----- Original Message -----

From: "Kenneth Gartland" <trnsrme at gmail.com> 
To: "greenkeys" <GreenKeys at mailman.qth.net> 
Sent: Friday, November 4, 2016 10:30:37 PM 
Subject: [GreenKeys] M33 Motor fan... 



Hi 

Note for Brad re: his seized motor fan... 

I have seen this problem many times... 

Most likely, the set screw was over torqued during assembly 
and it resulted in a raised "Circular" indent in the motor shaft 
where the set screw was positioned... 

Two possible fixes... 

Remove the set screw completely from fan hub, and fill 
the hole with a good penetrant oil such as PB Blaster, 
Liquid Wrench etc. 

Let it soak in awhile and then holding the pinion end of 
the motor shaft (Pinion removed) with the mounting screw 
only in the end of the shaft, use this screw to hold the shaft 
while trying to rotate the fan counter and counterclockwise 
direction to see if it loosens up... 

This usually works, if not, then brute force is required by using 
a pair of wide flat blade screwdrivers, one opposite to the 
other, and prying them together in a reverse direction to force 
off the fan...A second pair of hands to hold the motor casing 
while you do this is real handy! 

In any case, when you get it off, the scored area on the 
shaft where the set screw was positioned shud be sanded 
down with ultra fine emery cloth, or a similar product 
known as Crocus cloth... 

When reassembling fan to shaft, place a thin smear of grease 
to area inside fan hub before positioning & tightening set screw... 

It will never cause you grief again! 

Good luck! 

Cheers! 

Ken 
VE3-HMQ 
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