Regarding teflon tape on brake fittings, don't use it. The fittings seal themselves if they are done correctly. Hydraulic fittings should not be using any tape. Teflon tape doesn't belong on any brake fitting. These trucks were built not using it. If the fittings leak then they are damaged or not don't properly.

 

Gary is right on here. I have never seen teflon tape or any sealant on brake fittings. Unlike on tapered pipe fittings which are sealed at the threads, the nut on a brake fitting only acts as a very effective clamp to press the flared tubing against it's conical seat. If that seat is leaking it needs to be repaired at it's source. If the threads are sealed it will then leak at the hole in the nut where the brake tube comes through. I do use a small bit of anti-seize on the nut, being careful not to introduce any into the system.

 

You are both correct and I'm not sure why I was harping on that for brake lines. Can I use the insanity or the Alzheimer's excuse. I've been playing with heater hoses and the like, must have had some cerebral flatulence.

 

It's all good. You can take some comfort in the fact that even with cerebral flatulence, you're firing on more cylinders than I am!
The Cap'n