Can’t loosen hydraulic hose (not a quick connect)

[seville009]

From the look of that partially rounded fitting, I assume you will probably replace the hose. If you don't, you will have the same problem the next time you try to remove it. Cut the fitting between the nut and bulge with a sawzall. Then you can get a flare nut, or socket wrench on what's left of the fitting.

Sometimes, you can file the flats of the fitting to get a snug fit on the next size smaller socket. Using a metric socket also helps.

If you still can't get it out, use a screw extractor on the inside of the fitting:

View attachment 1288541

Amazon.com

Make sure you clean out all the metal chips to keep them out of the hyd. system.

Thanks for the suggestions.

The hose that I’ve partially rounded the nut off is actually a good hose, so I don’t want to ruin it (any more) if possible. .
The hose that’s leaking is on the inside bottom, and the only way to get that hose off is to take the other three hoses off first so that I can get a wrench on it.

I think the warm summer weather may be making the metal nuts expand a bit and become just soft enough to have the wrench round it. The two previous times that I had these hoses off with the same wrench was in the winter, so presumably the metal was harder and less prone to rounding due to the cold.

My plan now is to stop at the dealer this week and see if they have any tips/suggestions.

Thanks again.

 

[IH3444]

Flare Nut Wrenchs.

https://www.harborfreight.com/search?q=flare%20nut%20wrench

 

[seville009]

Flare Nut Wrenchs.

https://www.harborfreight.com/search?q=flare%20nut%20wrench

Problem is that there is a metal bulge in the hose fitting right in front of the nut, so there’s no way to get the flare nut wrench over the bulge and onto the nut.

I have no idea what the purpose of that metal bulge is, other than to possibly strengthen where the fitting connects with the hose.

 

[Mike1955]

Yeah - tried heating it; no dice. I’ve given up for now. Will tackle it again in a week or so. Sometimes leaving something for a bit makes it work in the end.

Thanks

Don’t they make line wrenches. Like a six point with one point gone?

 

[IH3444]

Have had non-fail success with these situations with long nose locking pliers. You had to put them on so tight you think you can't do it. Get them on very, very, tight, and then either try with your hand, or rapping them with a dead blow hammer. Be sure to get them on so if you have to rap them with a hammer you have swing room, and the pliers are facing the correct direction so when you hit them you are not loosening them. Real touchy situation you have there. When you do finally get them lose I would seriously consider replacing both hose with user friendly hoses.

https://www.harborfreight.com/hand-tools/pliers/locking-pliers/10-inch-long-nose-pliers-39717.html

These are OK pliers, in your case I would spend the money for higher quality, VICE-GRIP brand.
Or just try and fit regular VICE GRIP and smack them with a brass soft blow hammer.

 

[seville009]

Don’t they make line wrenches. Like a six point with one point gone?

Yes - that’s the flare nut wrench, but that metal bulge on the line prevents me from getting the wrench onto yhe nut.

 

[seville009]

Have had non-fail success with these situations with long nose locking pliers. You had to put them on so tight you think you can't do it. Get them on very, very, tight, and then either try with your hand, or rapping them with a dead blow hammer. Be sure to get them on so if you have to rap them with a hammer you have swing room, and the pliers are facing the correct direction so when you hit them you are not loosening them. Real touchy situation you have there. When you do finally get them lose I would seriously consider replacing both hose with user friendly hoses.

https://www.harborfreight.com/hand-tools/pliers/locking-pliers/10-inch-long-nose-pliers-39717.html

These are OK pliers, in your case I would spend the money for higher quality, VICE-GRIP brand.
Or just try and fit regular VICE GRIP and smack them with a brass soft blow hammer.

Tried vise grips, as well as this locking crescent wrench. No dice……. The metal nut is almost too soft.

 

[kennyd]

No O-rings in them……..

That sure looks like an ORB/SAE fitting, so there should be an o-ring. If there isn't, and you tightened it enough to stop it from leaking, that is the real issue here.

 

[IH3444]

That sure looks like an ORB/SAE fitting, so there should be an o-ring. If there isn't, and you tightened it enough to stop it from leaking, that is the real issue here.

View attachment 1288719

You can see the O-ring squeezed out in the first photo. The fitting had been severely over tightened. I still think that regular jaw vice grips can remove them. Then new hoses need to be purchased and properly installed.

 

[m7040]

When I have had problems like this I will use the 12 inch Knipex pliers and has worked very time