brake line
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Fleet Owner
Joined: Jan 2004
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From: Brentwood,CA
brake line
i need to replace both brake lines from the master cylinder to the proportioning valve the original size was 3/16'' tube with 1/4'' fittings except for one fittingwhich was 3/8'' can i use 1/4'' tube with a 1/4'' to 3/8'' adapter
Lead Driver
Joined: Sep 2003
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From: Other side of the sunrise
I used an adapter on my new brake lines where I did not have the old fitting to flare in. I put the adapter at the porportioning valve and it seems to have seated well as I have no leaks or air getting into the system. I found the brass adapter fitting at Napa.
Posting Legend
Joined: Sep 2001
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Going to a larger tube will make your brakes "softer". Brake fluid is very slightly compressible and the larger tubing swells and stretches more under pressure. The effect is small but if you find your brakes don't feel as "hard" you know why.
The flare for the 1/4" tube may not fit the fitting seat properly.
The flare for the 1/4" tube may not fit the fitting seat properly.
Logistics Pro
Joined: May 2003
Posts: 4,238
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From: Northern Illinois
Why not just use the 3/16" line and get the correct adapter? I know that they are sold, Edelmann make's them.
I gotta agree with Torque, I would not put the bigger line on.
On edit::: Are you sure that is 3/8"? I thought the correct size would of been a 9/16-18 thread. The part # for Edelmann I think is 258340.
I gotta agree with Torque, I would not put the bigger line on.
On edit::: Are you sure that is 3/8"? I thought the correct size would of been a 9/16-18 thread. The part # for Edelmann I think is 258340.
Last edited by ranger429; Nov 7, 2004 at 07:18 PM. Reason: Fitting size
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From: In the Middle
Originally Posted by ranger429
Why not just use the 3/16" line and get the correct adapter? I know that they are sold, Edelmann make's them.
I gotta agree with Torque, I would not put the bigger line on.
On edit::: Are you sure that is 3/8"? I thought the correct size would of been a 9/16-18 thread. The part # for Edelmann I think is 258340.
I gotta agree with Torque, I would not put the bigger line on.
On edit::: Are you sure that is 3/8"? I thought the correct size would of been a 9/16-18 thread. The part # for Edelmann I think is 258340.
Edit: it's a '79 F150 long bed 2wd if it matters
Posting Guru
Joined: Jun 2005
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From: Location, Location.
In the last year I have replaced every inch of brake line in my 79 f250 2wd long-bed.
It was all 3/16" tube when found it, and I did it all in 3-16 tube.
On the MC there were three different sizes of fittings as far as the threads go, but all of them took 3/16" line, and the seats were for 3/16".
On the prop valve, there were again three different sizes of fittings, all took 3/16" line except for one that had an adapter on it for 3/16" line.
The brake cylinder fittings and front caliper fittings and seats were all 3/16".
The brakes are nice and firm.
It was all 3/16" tube when found it, and I did it all in 3-16 tube.
On the MC there were three different sizes of fittings as far as the threads go, but all of them took 3/16" line, and the seats were for 3/16".
On the prop valve, there were again three different sizes of fittings, all took 3/16" line except for one that had an adapter on it for 3/16" line.
The brake cylinder fittings and front caliper fittings and seats were all 3/16".
The brakes are nice and firm.
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Logistics Pro
Joined: May 2003
Posts: 4,238
Likes: 21
From: Northern Illinois
Originally Posted by 460
I need to replace my rear line from the prop valve all the way back. I checked for an adapter fitting at Napa and I think it was 9/16-20 thread, but I could be mistaken. So, I can use an adapter like this to downsize from the big hole in the prop valve to 3/16" tubing?
Edit: it's a '79 F150 long bed 2wd if it matters
Edit: it's a '79 F150 long bed 2wd if it matters
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