[Collins] 75A-4 Dial Spline Lock Nuts

[Jim Brannigan]

Heat worked for me on a different Collins radio, but I had room to work 
with.

Jim

> Still working on the 75A-4.  I encountered a problem I have never had
> before and really need some experience.  I set the end points on the PTO
> but went to center the dial but cannot get the spline lock nuts loose.
> I have the XCELITE 99 spline set.  The set screws take the #99-62 pieces
> and the inside of the lock screws are in good condition.  I have removed
> the front panel for cleaning and have good access.  To date I have
> managed to twist the spline wrench into a noodle.  I even shortened it
> with a cut off wheel to increase the torque.  I've tried ACETONE.  I
> haven't tried heat as I can't get my solder gun down to the shaft and am
> afraid I'll damage the dial.
>
>
>
> To date there is no damage but no movement (n pun intended) on this
> problem.  I really need some suggestions.
>
>
>
> Jim
>
> KZ5AW