Threaded on 12" 3 jaw removal

B

Batmanacw

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She be stubborn. I just heated up the flange nice and hot for the second time. I'm spraying it with Free All because I've never found anything that eats rust better.

I put a wrench and pipe on a chuck jaw with a cheater pipe and nothing is budging except I'm turning the entire gear train.

I'm guessing it will take a few heat cycles to finally break it loose. I'm sure it's been on there longer than I've been alive. No evidence of a nasty crash.
 
Soak it like crazy, it may have been on there for decades
I would use the 50/50 sauce (atf and acetone)
Maybe some liquid wrench too
Rig up some kind of heat source. Whack moderately with a chunk of timber to set up vibrations- help the sauce penetrate
If you can, get a strap wrench around the bull gear and wedge against the headstock somewhere if possible
I've used large Ideal clamps with leather belts in between to protect the teeth
 
Last edited:
12”? Maybe a backhoe?
 
markba633csi said:
Soak it like crazy, it may have been on there for decades
I would use the 50/50 sauce (atf and acetone)
Maybe some liquid wrench too
Rig up some kind of heat source. Whack moderately with a chunk of timber to set up vibrations- help the sauce penetrate
If you can, get a strap wrench around the bull gear and wedge against the headstock somewhere if possible
I've used large Ideal clamps with leather belts in between to protect the teeth
Click to expand...
I put a wrench on one of the jaws close to the outside diameter and rested the wrench against the taper attachment. Then I turned the main pulley backwards in the lowest gear. It didn't budge. Pretty crazy. I figured the torque would be insane.
 
Maybe it's pinned or something. I would investigate a bit more.

Detailed pictures? Maybe we can come up with some ideas with some visual reference.
 
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