IO-4510 scope restoration - knob realignment

[Alex [Temple-Heath List]]

At 02:05 PM 1/8/2008, you wrote:
>Hi Again Alex,  OK so can not move the switch shaft. I should have known
>that because I have a IO-4510.
>I took a knob from my scope and went to my drill box ang used a drill that
>I turned upside down that just fit into the plastic hole.  A little
>pressure on the drill and ths insert pushed out. I thought that I might
>need to use a hammer but not so.
>Leo

Hi Leo,

Yes, I managed to push out the bushings of two of the inner black 
knobs from the Y2 V/CM input selector, and the TIME/CM selector in 
pretty much the same way by carefully pushing with a torx 
screwdriver. But those where the easy ones. I still need to remove 
the bushing from the small black Y2 Position knob which is way off 
(about 160 degrees) from the OFF marking, and the red Y1 variable 
knob which is only marginally off. And those bushings really look 
tough to remove by force, just alone to get a proper grip on them 
won't be easy.

I got a suggestion of inserting a hot soldering iron tip into the 
knobs hole and wait until the plastic of the knob softens enough to 
be able to pull it off the bushing. Problem is that I don't have a 
soldering iron with a tip thin enough to fit into the hole of the 
smaller buttons. On the other hand, not sure how would I be able to 
pull on the bushing once the plastic knob has softened a bit. As a 
test I tried to tread a self tapping screw into the hole in order to 
try and get a grip on the bushing, but the steel inset wont let me do 
this and the screw always ends up slipping out of the hole.

Hmm, going to do some more thinking, but in the mean time keep the 
suggestion coming. Thanks.

-Alex 

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