Stuck backhoe pin

[fatjay]

Replacing bucket, every pin came out easy except the main pivot pin on the bucket. I tried hammering the **** out of it, putting a pipe wrench on it and then push it with the hydraulics but it won't move. I put a pulley puller on it and turned it in, put heat on it, nothing. I'm running out of ideas.

 

[ptsg]

I would say that there is enough wear to create a ridge on the pin and cause it to get stuck.

You might have to find the sweet spot to take it out. Like trying to center the pin holes on the bucket to the pin holes on the arm.

 

[Industrial Toys]

I had one like that when I got my hoe and could not take off the bucket. Tried heat and stuff and looking at the price of a new pin from Kubota, decided to saws-all it through. Actually easier than I thought with a cordless Dewalt that had been given to me. Quite impressed! Anyway, then getting out the three pieces was easy without damaging the hoe.

 

[TractorGuy]

Oxi Acetylene torch with a rose bud tip. Heat all the way across the underside of the bushing and put a pipe on your pipe wrench handle for more leverage. Spray the ends with WD40 and repeat until it comes loose.

 

[Industrial Toys]

The problem I found is that enough heat didn't get to the center section of pin. The outsides were not the problem.

I generally found on seized stuff that nothing happens if it ain't red hot! You can heat all day long and it's just a waste of time and fuel.

 

[RickB]

The problem is not a Ridge on the pin, if that were the case the pin would rotate. The pin is seized in the center bushing. You are fooling yourself with the boy sized propane bottle, just wasting oxygen. You need a LOT of heat (think rosebud) across the length of the center bushing. Heat it red hot and quench. Rinse & repeat. If the end of the stick is boxed and the bushing is not accessible you will have to cut the pin on either side of the dipperstick with a saw and gouge out the center part of the pin.

 

[txdon]

Are you heating the pin? Won't that make it expand?

 

[Big Barn]

You may need to cut the pin out. Find someone with an exothermic lance.






I’d do it for you if you were closer.

 

[GMIslander]

Like they said more heat with oxi acet just to the left of where you have your propane now. Max heat will expand that bore and beat the pin out before the heat soaks into it.

 

[fatjay]

So basically more heat and more pressure. Shame, I’ll have to buy an oxi acet torch. At least I’ll have an excuse when the wife complains.

 

[4570Man]

You might have better luck with a weed burner propane torch for a lot less money than an oxi acet torch. I’ve used a loop of chains and a bottle jack for a press if there’s any way to get that rigged up.

 

[fried1765]

Replacing bucket, every pin came out easy except the main pivot pin on the bucket. I tried hammering the **** out of it, putting a pipe wrench on it and then push it with the hydraulics but it won't move. I put a pulley puller on it and turned it in, put heat on it, nothing. I'm running out of ideas.

That little propane torch is great for soldering copper pipe together, but is absolutely useless for the job you are attempting.

 

[fatjay]

You might have better luck with a weed burner propane torch for a lot less money than an oxi acet torch. I’ve used a loop of chains and a bottle jack for a press if there’s any way to get that rigged up.

Like this guy? Propane Torch

 

[MF RED in MT]

Like this guy? Propane Torch

I believe that's what he is talking about.

I have on from Ace Hardware that I use all of the time.

KC

 

[4570Man]

I believe that's what he is talking about.

I have on from Ace Hardware that I use all of the time.

KC

Yes, that’s what I had in mind.

 

[Jim Nelson]

I don't think propane will get hot enough to do what you want.I would do some research on the heat of the weed burner vs o/a. I think there is quite a difference.

 

[fatjay]

I've used o/a before, the problem is supply. It's very hard to get gas around here. And my wife hates it every time I get gas.

 

[ruffdog]

Heating the pin makes it grow tighter in the bore....don't do that. Heat the part that is around the pin to make it grow bigger than the pin. Being that you will be heating some major steel, the arm structure, you will need a real torch. Call a mobile welding outfit to help out.

 

[MF RED in MT]

I don't think propane will get hot enough to do what you want.I would do some research on the heat of the weed burner vs o/a. I think there is quite a difference.

I've used mine many times to heat up thick flat bar very fast and then I use my HF bender to make a bend in the hot metal (also have used it with #8 rebar to bend).

It's much cheaper to heat item up then using my oxygen/acetylene tanks.

KC

 

[TractorGuy]

You might find a mapp gas torch that will work. I have no experience with them but they are supposed to burn hotter than propane. Just don't know if one is available to heat that much area that fast.