John Deere 4010 brake line fitting

I have a small leak on the left brake line fitting that goes into the tractor housing which the brake line connects to. The line is OK but the fitting is rusted and has a pin hole and fluid shoots out when brake is applied. So here is my problem, the fitting that goes into the brake housing has part of the 1/2 in hex chipped off or possibly just corroded and flaked off. I have had this tractor for 20 yrs. so nothing has been tampered with in 20 yrs. What would be the best possible way to remove this fitting being I am sure my 1/2 in socket will not get a good bite. Any tricks other than if I cant get a socket on it to use an easy out.
I have a new fitting and the hole inside the fitting is pretty small and I don't want to have to drill out for a larger easy out.
Thanks...

I’m not familiar with the accessibility to your fitting but first I would try driving a slightly smaller six point metric socket on it. 1/2” is 13mm? Try driving a 12mm on it. If that isn’t possible, then vise grips? Weld a nut on it? Welding might introduce shavings into the system like drilling will so maybe welding is a last resort. The Deere guys will chime in soon with a better idea I’m sure.

That is an "ORB" (sealed by O-ring) fitting.

It SHOULDN'T be horribly tight, or rusted, since the O-ring has prevented moisture from entering the thread area.

Give it a try, but don't get rough and strip/break anything.

If it doesn't come loose, coax it a bit with a hammer and chisel, angle the chisel so it is trying to loosen the fitting.

I'm hopeful it will come out without too much drama.

Don't forget. Lefty loosey righty tighty. LOL.

Ditto what Bob & Mike stated!

(quoted from post at 10:52:40 10/19/17) That is an "ORB" (sealed by O-ring) fitting.

It SHOULDN'T be horribly tight, or rusted, since the O-ring has prevented moisture from entering the thread area.

Give it a try, but don't get rough and strip/break anything.

If it doesn't come loose, coax it a bit with a hammer and chisel, angle the chisel so it is trying to loosen the fitting.

I'm hopeful it will come out without too much drama.

Click to expand...

I think someone has already chipped a corner of the hex head.
I will try the 12 mm socket and see what happens, and use a chisel if I can. For now I unhooked the brake line from the master cylinder and capped it with a brass cap to keep fluid from spraying everywhere. If I get the fitting out and replace it do the brakes or brake lines need to be bled. If so how do I do that. For now I am shredding with only one brake and would like to have both in case I need to get on the road.
Thanks...

To bleed the brake,find the bleeder valve above the axle housing you want to bleed,open the valve 1/2 turn,with the tractor running,have
someone push the pedal down for the brake you want to bleed,hold it down for a couple seconds tighten the bleeder valve,and you are done.

(quoted from post at 19:01:49 10/19/17) To bleed the brake,find the bleeder valve above the axle housing you want to bleed,open the valve 1/2 turn,with the tractor running,have
someone push the pedal down for the brake you want to bleed,hold it down for a couple seconds tighten the bleeder valve,and you are done.

Click to expand...

Thanks.. I will look for bleeder valve.. just like bleeding vehicle brakes

(quoted from post at 16:38:16 10/19/17)

I think someone has already chipped a corner of the hex head.
I will try the 12 mm socket and see what happens, and use a chisel if I can. .Thanks...

Click to expand...

Hex head of bleeder is 1/2''. Have unlocked nut on bleeder?

(quoted from post at 16:38:16 10/19/17)

I think someone has already chipped a corner of the hex head.
I will try the 12 mm socket and see what happens, and use a chisel if I can. .Thanks...

Click to expand...

Hex head of bleeder is 1/2''. Have unlocked nut on bleeder?

OK, I think I am in bad trouble on the brake line fitting that goes into the tractor housing. I just got a better look at the fitting after removing the brake line and the 1/2 in. hex fitting completely crumbles into pieces. There is not a bit of the hex intact to attach any kind of socket to. I am including a pic if I do it correctly. I talked to a tractor mechanic and he said that these tractors were used a lot in harvesting cotton and the cotton leaves which contained acid would settle into this cavity where the fitting is and corrode the fitting and the line. I have never seen anything flake off in pieces with just using a pick to clean around it to inspect the fitting.
I may have to use just the right brake and not have a left brake.
I am open too any suggestions....