|[AMRadio] Stuck Set Screw|
Foltarz at rocketmail.com
Wed Apr 25 17:34:59 EDT 2007
One trick I have used in the past includes a two front approach.
First off, I have never found liquid wrench to be of much use for anything.
My choice would be PB Blaster - another great thing to come out of Cleveland.
Secondly, getting a little heat into the screw has often helped.
I did this by taking an allen key and placing it in the screw ( you could of
course use a flat head screwdriver or piece of stock to make contact if the
screw to be loosened is a flat head.)
I then applied heat to the allen wrench with a propane torch. I continued this
to the point where the accumalated penetrating oil smoked. I left the wrench in
place until cool.
I had to do this a couple of times ( alternating heat and the PB blaster) but
eventually the set screw "unlocked" and moved freely.
I cannot say the same for at least one HRO knob I had a run in with however.
There a hack saw was necessary.
--- Rick Brashear <rickbras at airmail.net> wrote:
> Here we go again. I know this was discussed in the past, but my memory is
> all but non existent on such matters. I have a larger knob, about 3 inches
> in diameter, with two Allen set screws in it. The insert appears to be
> brass, the set screws are iron of some kind. One has had the head messed up
> and I will likely have to drill it out, but the other is in tact. Both are
> frozen solid. I soaked them in Liquid Wrench for an hour or more, but no
> luck getting either loose. Same thing with WD-40. Does anyone have a magic
> cure short of drilling them out?
> Thanks for any help ya'll can offer...
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