Help 757C anti rotation bolt stuck

[johnnylight]

Both Stabilizer antirotation bolt/pin with tab will not come out on my NH Backhoe 757C..

sprayed PB Blaster, used heavy hammer still will not budge.

Any suggestions would be appreciated.


here are some pictures.

thanks

 

[Scooby074]

Pipe and 1/2" strongarm..

No real tricks, just get on it and get er done. Bolt might break, but such is life. If you have access to a torch you could try heating the bolt assuming there is nothing behind it like a hose to get damaged. Or even try welding a larger nut onto the head. The heat will work its way down the bolt and loosen it up

Hard to say if its corrosion or perhaps cross threaded from factory. Id chase the threads with an appropriate tap before reinstalling new bolts.

 

[johnnylight]

Jason,

It’s the long pin that am trying get out the nut and bolt is off.
see the tab that snapped apart.

Thanks I will try a torch next.

 

[Scooby074]

oh, your trying to remove the pin that holds the stab to the backhoe?

In that case, make sure theres no weight on the stab first.
i wouldnt torch the pin or bore unless its a last resort. A large pipe wrench can sometimes be used to wiggle the pin if you get a bite on the head.

Getting pins out basically requires a BFH and some sort of drift to fit in the bore and force it out. Sometimes working the stab up and down while someone beats on the pin can get it started.

Good luck. Ive seen pins that needed to be burned out. It can be a crappy job.

 

[johnnylight]

It wont budge tried a large pipe wrench.
The other side starting to mushroom from whacking it..
Would it do any harm to leave it as is?
I bought replacement parts so if it breaks free am ready.
I’ll keep at it.

What does BFH mean?
Thanks

 

[SPYDERLK]

It wont budge tried a large pipe wrench.
The other side starting to mushroom from whacking it..
Would it do any harm to leave it as is?
I bought replacement parts so if it breaks free am ready.
I値l keep at it.

What does BFH mean?
Thanks

BigFHammer, which youve done. Never hit a pin directly. Use another pin/punch to transfer the blow accurately. Use a real BIG hammer to limit the number of blows. Heat the joint, use penetrating oil as it cools, heat again and hit it inward then outward. ... Repeat
larry

 

[johnnylight]

I did try the punch after many attempts failed.
It is a on going battle so far 1-0 pins are winning..
I will try your suggestion.

Thanks

 

[SPYDERLK]

I did try the punch after many attempts failed.
It is a on going battle so far 1-0 pins are winning..
I will try your suggestion.

Thanks

The punch must be very rigid ... read short and big. Otherwise it cushions the blow too much. Someone holding punch using Vise Grips AND gloves. You giving a controlled swing with a 10# sledge. :thumbsup: ... You may need a reaction mass to brace the flange opposite the swing.
larry

 

[Scooby074]

no luck yet eh, john?

It can be a bear. Yes BFH is BIG friggin Hammer. The bigger the better. When we'd change pins, we used a drift made from an old pin, welded to a steel handle. The end result was an offset T with the handle offset closer to the hit end. It was a 2 man job.You might have to remove the BH if you cant get a swing at it. Watch the mushrooming. If it starts to mushroom up, grab a grinder and put a chamfer back on it before it gets too bad.

It is a brute force job. Did you try juggling the stabilizer while beating on the pin? Sometimes while moving the stablizer, youll find a sweetspot and the pin will come out real easy. Id probably change the pin and not leave it. It will loosen at the worse time, you wont see it and put the stab down. Without the pin through both holes you'll end up twisting something.

One thing, your sure there are no other locks (like a bolt through the pin) holding the pin in? There shouldnt be with that style pin, but just throwing it out there.

 

[johnnylight]

Jason,Spyderlyk

Update:

Still at it with some movement am working on the other pin with your suggestion. (see pictures) It is a long and hard process with very little movement..
At-least it is moving.

I have tried different positions but can not while stabilizer in motion due to limited work space for swinging sledge hammer.

Just have to keep at it.

Thanks for your help