Re: {Collins} 75A4 4:1 Dial

[Joe Eide <jbeide@xxxxxxxxxxx>]

Hi Mike,

The problem of course is that there are burrs from the setscrews that 
are causing the problem.  If there is anyway to remove them with fine 
emery cloth or a small file, that will help.  Unfortunately, you 
probably can't move the gear back either or enough to expose the problem.

Sometimes I have had to pull or force the gear outward while tapping the 
end of the shaft with a plastic hammer.  Obviously, you don't want to 
damage the PTO when you are tapping. If a person had a little gear 
puller or could fabricate one, that would be the safest method I would 
think.

Anyway, I can feel your pain trying to dislodge this gear.  When you do 
finally get it off, make sure you remove the burrs completely before 
re-installing.  I don't think the setscrews have to be that tight next time.

Good luck,

Joe - KB9R



Michael C. Marx wrote:
> Hi All,
>
> I'm working on a 75A4 which I want to pull the front panel off of.  I've done it several other times on 75A4's with relatively little trouble.  This one is a booger, however.  The problem is that the large brass gear does not want to pull off of the main tuning shaft.  I removed the setscrews and lubed it and it will rotate freely on the shaft but I've made very little progress pulling it off.  I don't want to get too rough with it and ruin it.  Does anyone have any "tricks" or suggestions on how to pull that gear without wrecking the whole business?
>
> 73,
> Mike WBØSND
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