lube for brass npt brake fittings

alpinelakespilot2000 · #1 11-17-2006, 07:28 PM

Can someone point me to a source that indicates what (if any) lube should be used on the threads of the brass fittings that go into the master cylinders? I looked through 43.13 and millions of brake posts on this forum to no avail. Thanks.

LettersFromFlyoverCountry · #2 11-17-2006, 07:44 PM

I can't point you to anything specific. I used BakerSeal.

this was my guide.
http://rvproject.com/20050420.html

AndrewTR30 · #3 11-17-2006, 08:49 PM

They recommended using some type of lube on the threads. I asked about using Fuel-Lube and they said "yup, that'll work."

G-force · #4 11-17-2006, 11:21 PM

All npt fittings should have a thread sealent on them. Fuel lube, baker seal, PST, esy turn...as long as it is compatable with the fluid your sealing, it will work.

robertahegy · #5 11-18-2006, 05:54 AM

I use a teflon sealant made by LockTite. It is a white cream. I think it is # 567?

Roberta

G-force · #6 11-18-2006, 09:08 AM

Quote:

Originally Posted by robertahegy

I use a teflon sealant made by LockTite. It is a white cream. I think it is # 567?

Roberta

That would be Locktites high temp PST with teflon. Thats my prefered thread sealent, I use a lot of it at work.

trib · #7 11-20-2006, 09:43 AM

Would the locktite PST 567 be good for use on the fuel line AN fitting threads also?

G-force · #8 11-20-2006, 01:24 PM

on the 37 degree side? It would work fine as an anti sieze, we have to use it on every one of the thousands of stainless fastener we use at work to prevent galling. I believe normaly the 37deg an side is done dry, although I have heard of some people use some sort of antiseize. It wont do anything for sealing, that is acomplished on the mating 37 deg surfaces.

hecilopter · #9 11-20-2006, 02:22 PM

fuel lube, teflon, Baker seal and the brake fittings still leaked! I eventually removed them all, applied Baker seal, and tightened the fittings until I thought they would break off. That fixed it! For me, no matter what I used, I simply wasn't tightening the fittings enough. Surprisingly, I got an extra turn or 2 from what I thought was originally tight. Be sure and tighten these things until you think you can't turn any further.

LettersFromFlyoverCountry · #10 11-20-2006, 03:48 PM

Quote:

Originally Posted by hecilopter

fuel lube, teflon, Baker seal and the brake fittings still leaked! I eventually removed them all, applied Baker seal, and tightened the fittings until I thought they would break off. That fixed it! For me, no matter what I used, I simply wasn't tightening the fittings enough. Surprisingly, I got an extra turn or 2 from what I thought was originally tight. Be sure and tighten these things until you think you can't turn any further.

My worry when I did this was I had to get them a FULL turn and it felts like quite a gamble. What if I started and I only got it to the 5 o'clock position? I elected to stop where I was and see what happens.