Steel Brake Lines

[jaxsof]

393.45 subpart d: Brake tubing and hose connections. All connections for air, vacuum, or hydraulic braking systems shall be installed so as to ensure an attachment free of leaks, constrictions or other conditions which would adversely affect the performance of the brake system.

It doesnt specify how this is accomplished

Oh, BTW, MIL-F-18866 AN (Army-Navy) Fittings specify a 37* Flare. Check if you are replacing lines! 45* and 37* dont play well together

 

[Katahdin]

I pulled this out of my brake line system last month. A Nat Guard mechanic must have patched the rear 5/16" line with copper, single flaring it on one end and using compression fittings on the other:



This was a GL truck. Shame on me for not noticing this sooner...

The front and back 5/16" lines have now been replaced with new double-flared Poly-Armour lines.

 

[rustystud]

I pulled this out of my brake line system last month. A Nat Guard mechanic must have patched the rear 5/16" line with copper, single flaring it on one end and using compression fittings on the other

View attachment 502588

This was a GL truck. Shame on me for not noticing this sooner...

The front and back 5/16" lines have now been replaced with new double-flared Poly-Armour lines.

HOLY CRAP !!! You have some serious Guardian Angels looking out for you ! Knowing that the average pressure in a wheel cylinder brake system is over 800psi you are one lucky dude !! Maybe you should go and get some LOTTO tickets with your kind of luck !!!