I'm looking for the part number, OEM or replacement, for the brake line fittings for the end of the hard lines that screw into the master cylinder. Trying to cross reference what I can get ordered and OTW quickly from Amazon, or the like. I have to wait until Tuesday to get the master cylinder replacement I ordered (odd - none of the local parts shops have master cylinders for these old guys in stock anymore. Go figger). I'm not sure I trust that anyone at any of these shops are going to be able to match up the fittings, either!

This is for a 1973 F250 2WD, dual piston front disk, rear drum, 390 w/ C6 auto.

The original two that screw into the master cylinder are rounded off, and now they're chewed up from having to use vice grips to get them unscrewed.

Worse, when removing one of them the hard line was seized inside the fitting so bad that it twisted off and broke the hard line... So I figure if I'm going to cut and flare one of those lines, I might as well do both, and replace those fittings.

 

Better still replace both of those lines. It won't cost that much and might be cheaper in the long run. Would also strongly suggest you replace the booster at the same time. Might just save you some headaches later.

 

I'd wait till i was holding the master cylinder in my hands before looking for fittings. Got new stainless tranny lines that were supposed to be direct replacement and all 4 fittings were wrong. Had to find adapters.

 

Ford did not supply steel brake or fuel lines. These had to be made up using a tubing bender, the apropos sizes of bulk tubing and fittings.

 

My truck has a master cylinder and a separate proportioning valve, and there were a couple of hard to find sizes on them for the flare nut connections. I found this kit on Amazon that had everything I needed (with the except of one 9/16" fitting) to redo the brake lines on the whole truck. Made up my own lines with some 3/16" Nicopp tubing - so much easier to work with than steel, and doesn't rust.

 

Any (good) hardware store will carry the fittings. Ask for inverted flare fittings.

 

Tube nuts and tubing available at NAPA.

 

Maybe take a look at something like this
https://www.ebay.com/itm/Brake-Line-...YAAOSwPgxVOstB
Or have the guy at Oreillys let you go with him to the back room where they have a cabinet full of that stuff.Do yourself a favor and buy a coil of NI Copp brake line. Sooo much easier to bend and double flare with no leaks..

 

If you zoom in on the MC you can tell that the one in the back is larger than the front.
Do you plan on using the existing lines and adding the fittings? Are they the original steel lines? If so, I would look into replacing the steel lines as a set. If you go that route, the fittings would be part of the new set.

I do know that on mine, there were two different sized fittings going to the master cylinder.

 

Seems like that line had a larger nut at both ends of the line.

Mike

 

Your right it did going to the proportioning valve too.

I think JBG has some complete sets as well as others. (Can't remember who)

 

Mac's has the line and fittings....
They would have the parts to make the new ones from the MC down to the prop valve.