Hydraulic hose fitting broke inside cylinder (pics)

N4TE · Jul 13, 2011

I finally got my tractor started and when I tried to use the hydraulics, a hose fitting broke off inside the cylinder.

How would you get it out?

showcrop · Jul 13, 2011

I have removed broken 3/8 fittings many times by just tapping a large screwdriver into it. A 1/2 is just going to take a larger screwdriver or perhaps a piece of scrap steel ground to fit with good sharp corners. It will not take much due to its having lived in oil and just rusted thin from the outside.

greygoat · Jul 13, 2011

This is a classic example of why you shouldn't
use water pipe fitting on hydraulic systems.
And..you are risking your life if one should
break or blow off under pressure!
A large "Easy Out" should get it out.

ET · Jul 13, 2011

This is one place that an easy out will work. Use black iron seamles pipe not galvenized.

N4TE · Jul 13, 2011

So after I get it out, I can just replace the fitting with a black iron elbow? Like one from Home Depot?

I thought I would need to go buy a new expensive hydraulic hose.

C.R. · Jul 13, 2011

buy an american made fitting the threads will be right offshore made might mot seal

ET · Jul 13, 2011

Yes, black iron is what they use for steam presure. Some hyd. fluid aditives can disolve the galvenized coating too.

El Toro · Jul 13, 2011

Buy a new black street EL. Take the broken piece along to get the correct size. The fitting on the hydraulic hose doesn't look to be a swivel fitting and you probably will need to disconnect the other end of the hose to get it connected to your new street L. Hal

N4TE · Jul 13, 2011

This forum is great! Thanks so much!

Should I wrap the threads with teflon tape or is that a bad idea? Also, is there a specific hydraulic fluid I should use?

old · Jul 13, 2011

I deal with that type of problem all the time and have a set of high $$ E-Z outs that so far have worked each and every time to pull a broken piece like that. But I did say they are high $$ as in the set cost me over $75 and that was 10 plus years ago and so far only broke one and it was the next to the smallest one

john d · Jul 13, 2011

Teflon tape is okay. Wrap it clockwise around the threads as you look at the end of the fitting. Put it on so you skip the first couple of threads. That will lessen any chance of a little piece of it migrating into the hydraulic system.

greygoat · Jul 14, 2011

A "Black" pipe fitting is just one that hasn"t
been galvanized!!!!!!!!!!!!!!!
UNLESS...you get one that is stamped, or has
forged into it WOG,(Water-Oil-Gas) and a pressure
rating such as 1000/1500, for Working pressure.
Usually that would be found in a SCHEDULE 80
black pipe fitting found at a commercial plumbing
supply. Since pipe threads are STANDARD, a heavy
duty pipe fitting will be thicker, THUS, the
inside diameter will be smaller, causing
restriction, and you"ll get less flow..or, you
can force more flow through it, thus making heat!
Commercial/industrial hydraulic systems using
black pipe RATED FOR HYDRAULICS, usually go to
the next larger size of pipe, example-3/4 instead
of 1/2 to account for the thicker wall and reduced inside diameter.
Only a nut case would use water pipe on a hydraulic system.Bite the bullet and purchase
a forged or machined HYDRAULIC FITTING. It"s not
worth risking your life if a water pipe fitting
should blow up!

JOHNNYfromMI · Jul 14, 2011

After you get the broken part out, Don't use teflon tape when you install a new one! Use a sealing paste made for oil. Tape could peal off and get into you hydraulic system and cause a whole new world of problems!

N4TE · Jul 14, 2011

I got the piece out last night. There was a rough spot along where it broke and I put a screwdriver against it and tapped with a hammer just to see how tight it was in, and it started turning. It came out much easier than I expected.

I'm going to buy the new fitting tonight. Where can I get sealing paste?

JOHNNYfromMI · Jul 14, 2011

pipe dope that is ok to use with oil

Anonymous-0 · Jul 14, 2011

Teflon tape has been used on thousands of hydraulic systems with no problems. Like was said, wrap it clockwise so it tightens rather than unravelling and leave it a couple threads back from the end. Some hyd machinery specifies teflon tape over paste. Also use a forged fitting designed for hydraulics. They aren't too expensive but they're smaller in size and a lot stronger. The place that sells them should have teflon tape or the paste if that's what you prefer.

El Toro · Jul 14, 2011

I like Gasoila "Soft Set". I put a light coating over teflon tape at times. Hal

Anonymous-0 · Jul 14, 2011

If you can find them use american made fittings .Had to put a new twin spool valve on loader.Used new fitting in replacing it. Half of the fitting leaked. Took back the made in china and found American made. Threads much better on the American made fittings.

JOHNNYfromMI · Jul 14, 2011

go ahead and use teflon tape, it's your machine.
I'm a retired equipment operator and most of the companys I worked for didn't want ANY teflon tape on the hyd system. Catapiller never allowed it's repair men to use it, but if you know better go ahead and use it! Maybe Catapiller don't know as much as you do!!

showcrop · Jul 14, 2011

Teflon tape has caused problems with thousands of pumps too. Where I used to work they got so many pumps back with tape in them causing valves to hang up that they finally sent a bulletin out to all of the techs in the country to stop using it and let'em leak. Many people put it on just a little to close to the end, and the threads cut it, and there it goes down stream.

Anonymous-0 · Jul 14, 2011

Most Caterpillar equipment doesn't use pipe thread so there's no need for teflon tape, paste or anything else. If you have a leaking flare fitting or ORB fitting, putting something on the threads isn't going to do anything. Teflon tape doesn't cause any problems if it's put on correctly. My dad sold expensive hyd. flail mowers and it specified right in the manual to use teflon tape on the threads and not paste.

El Toro · Jul 16, 2011

You could have a new short hydraulic hose made using JIC swivel nuts on both ends and a steel male tube fitting to male pipe threads to thread into where you removed the broken piece.

Remove the broken elbow from the hydraulic hose
and buy a 90 degree steel JIC elbow with male threads to female pipe threads that will connect to your hydraulic hose. Hal

N4TE · Jul 18, 2011

Thanks everyone for your help. I ended up getting one a black iron elbow at Home Depot, which did not fit at all. So I took the one off the other side and went to Napa. They had exactly what I needed and it fit perfect. I didn't use any teflon tape or paste, and no leaks.

Now I've got other problems...

Hydraulic hose fitting broke inside cylinder (pics)

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