Stuck backhoe pin

[jaydee325]

Back in the day, I used to deal with this issue a couple different ways. Both need patience.

First, heat the PIN! Yep, expanding the pin in the bore and letting it cool completely was some times all it took to break the rust bond between the pin and the parent metal. Then you could pound it out.

Second, I was pretty skilled with a cutting torch. You needed a substantial one and MAP also helped. I'd carefully gouge out the pin until I blew a hole clear through. Lots of times this was aided by the grease port that would go at least half way through. Then I'd finish it off by clearing a cut all the way through to the parent bore. You have to be patient like I said, but I never nicked the bore! Then pound it out.

Have fun!!

 

[4570Man]

MAPP gas is definitely somewhat hotter than propane, but that hoe bucket pin area is a massive amount of metal to heat.
MAPP with any of those small tank torch heads, would not make any real difference.
As mentioned in a previous post on this thread, Oxy/Acetylene with a rosebud tip is the way to go.

Mapp gas, or a little oxy/acetylene isn’t going to do the job. It’s not necessarily the temperature of the heat but the amount of it. I predict the 20 pound propane torch as being enough heat.

 

[stuckmotor]

I have a jack hammer, I'm amazed I didn't think of that but that's a great idea.

I'm the one who's amazed. I'm amazed that you happen to have a jack hammer. Good luck, be careful, and let us know how things work out.

 

[fatjay]

I'm the one who's amazed. I'm amazed that you happen to have a jack hammer. Good luck, be careful, and let us know how things work out.

The list of tools I don’t have is a lot shorter than the list of tools I do have. That’s why I’m convinced theres a way to make it work with the tools I have, I just haven’t figured it out yet. And now I have a flame thrower!

 

[Industrial Toys]

I was once offered an ice melting transformer, and am kicking myself that I didn't take it. For putting current through steel pipes to thaw them. It makes me wonder what it would take to heat a pin like that with electricity?

 

[pmsmechanic]

I was once offered an ice melting transformer, and am kicking myself that I didn't take it. For putting current through steel pipes to thaw them. It makes me wonder what it would take to heat a pin like that with electricity?

The old Fourney welder owners manuals had a page on how to use a welder to do that.

 

[Big Barn]

The old Fourney welder owners manuals had a page on how to use a welder to do that.

 

[Industrial Toys]

Could one make a pin red hot or would the leads and welder fail first? That is a terribly low resistance to put energy into.

 

[RickB]

There's a very small hole about 1/4" throught he center of the pin. I have a pointed bit for my jackhammer so I'm planning on putting it in that hole to avoid mushrooming it. I'm going to rig up a tripod to hang the backhoe from that way it will be easy to push against that pin. I believe the boom is solid. I'll put heat against it, can't hurt i hope. then hammer the **** out of it.

That is all but a guarantee to mushroom the pin. You would be better off with a flat faced tool that covers as much of the end of the pin as possible.

 

[Industrial Toys]

I envision them riveting the Titanic.