VCCA Home Forums TECHNICAL - GENERAL Mechanical - Engine, Trans, etc 1953 3100 / master cylinder / brake line

Hiya folks.

1953 Chevrolet 3100 series(half ton) pickup

I am trying to replace all of the brake lines as I had a rupture last year, I have all of the lines removed, finally.

I had to take the MC off the truck in order to get this brake line loose.

I have questions about the line that goes into the back of the brake master cylinder, it has a thread on it, then it passes through the brass piece on there.

Can I buy a new brake line with this thread on it? I've never seen a brake line quite like this before, so I'm guessing the parts store people will be equally confused.

Any help on terminology or a parts source is appreciated, thank you.

-Woogeroo



folder of brake line photos




mc still mounted with brake line


MC / brake line


brass piece on brake line


brass piece / brake line


mc / brass piece / brake line


brake line / brass piece

I believe the line is attached to a "banjo bolt" and that is the part with the thread and goes thru the brass junction block. To the right of the brass piece is a copper gasket-hex head part of banjo bolt-then what remains of the nut that attaches the brake line to the banjo bolt.. I think there should be a copper washer on both sides of the brass junction block.

I agree that is the block that a banjo bolt goes through. That is a different banjo bolt because it also has a hole completely through the length of the body.

If you look at your pictures of the brakes on your rear axle you will see that the brake lines are attached to the wheel cylinders with this arrangement. Except those do not have the hole for the second brake line.

Check section 4,686 of your parts book.

Others are correct that is a "banjo bolt" that has a standard pipe fitting in the end. The photo shows the tube nut on the pipe has rusted round so may need locking pliers to undo it.
Tony

I believe the banjo bolt has a straight thread as it needs to compress the junction block to seal both sides. A standard pipe fitting is tapered for sealing . The fittings for the lines in the block and banjo bolt will be inverted flare style.

That is correct............

Ah, so it is supposed to come apart.

I wasn't sure about that, but I was thinking that it did.

Wanted to ask some more knowledgeable folks about it before I started applying too much elbow grease.

Thanks for the replies everyone.

-W

I put the bolt in a vice and took a pair of vice grips to the corroded brake line side, where the nut was rounded off... after a few attempts with the old metal on the brake line flaking off, finally got down to some good metal with a grip and the brake line nut broke loose. Then I was able to take it apart and clean it up.

Thanks for the tips folks.

-W

I am surprised you were able to undo the banjo bolt without screwing the pipe off and totally ruining it. Though it may advisable to replace it anyway.
Tony