Help on my adjustable stool

[Mach5]

I picked up a reasonably nice stool off CL a weekend or so ago. It's supposed to be height adjustable, but it's old school, which means it uses a large screw that locks into a key (slot) on the seat post. I need to increase the height a bit but I can't get the screw to loosen. I tried soaking in some WD-40 and also tried to apply a bit of heat with a propane torch, but I may not be doing it right.

Can anyone offer some tips?

Thanks in advance.

Don't have any pics at the moment but plan to remedy that in a bit.

 

[ScurvyPete]

Probably a dumb question, but are you applying heat to the screw itself or the post? I would think that heating the screw directly would exaggerate your problem

 

[Kevin54]

Screw or setscrew? Either one, take either a screwdriver, preferably an old one, or cut off the "L" portion of an Allen wrench if it's a setscrew, and hit the screw a few times to loosen it using the screwdriver or hex wrench as a punch. By doing so it should bust the rust loose.

 

[Mach5]

Set screw with handle end.

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[HTGTS350]

A set of multigrips on the handle of the screw for a bit more leverage maybe?

 

[600SL]

WD40 wont do anything for this. Use PB Blaster or Liquid Wrench. If its really bad apply the liquid wrench every day for a week.

 

[Mach5]

I have pb and will try. It doesn't look corroded so I'm not sure why it won't budge.

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[Mach5]

Got it. Blasted with PB and put a pipe wrench on the handle (after wrapping with a shop rag). Barely pushed the pipe wrench and it started turning. Thanks for the tips. Now the issue is that it might not be tall enough! I got it set to the right height but it feels a bit loose and tippy. Oh well.

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