[TowerTalk] Prop Pitch seals

[Donnie Murray (KE4RNA)]

Mike, sounds to me like you need a new shaft. I know that may sound 
life threatening but if you want to fix it right you're either gonna 
have to get the shaft built up and turned back down to probably 
0.500", or replace the shaft with a new one. If you are trying to 
retain oil in the gearbox the new seal will not help you if the shaft 
is badly worn If it's grease you are sealing in, it's not going to 
leak anyway unless you over fill it or it gets hot. If you are trying 
to seal out dirt, grit, ect. it'll have to fit right. If you're not 
afraid of weakening the shaft further, you may want to try polishing 
it down with a file to begin with then slicking it up with emory 
cloth. You're not far from a 7/16th inch shaft now. Call around to 
suppliers of bearings and ect. and ask for a lip seal 1-1/4 O.D by 
7/16 I.D. by 3/8 thick. Now that bearings have come to mind, 
there is a good possibility you may have a bad one. Somethink may 
have allowed some run-out in that shaft and the first sign is a worn 
shaft and seal. I'm sorry.   
> From:          little_mike@ccmail.ncsc.navy.mil
> Date:          Wed, 07 May 97 12:20:28 -0600
> To:            <towertalk@contesting.com>
> Subject:       [TowerTalk] Prop Pitch seals

> 
>      Does anyone know a replacement seal part # for the gearbox motor shaft 
>      oil seal. I took the old seal and planetary gear assembly (to keep 
>      from removing the motor shaft) with me to a couple of places here in 
>      Panama City, FL. but no luck.
>      
>      The cartridge seal dimensions are 1.127" OD, 0.370" thick and seals 
>      the 0.468" motor shaft. The wear is so bad on the seal that I can't 
>      measure the seal ID.
>      
>      Responses greatly appreciated,
>      
>      Mike Little KB4KKL
> 
> 
> 
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73/DX,
DONNIE, KE4RNA

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