drum brake restore
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Joined: Jul 2011
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drum brake restore
I have a 1964 F100 that I am starting to restore; I have started with the brakes (drums on all four. I decided to replace all of the old tubing and hoses. When removing the old tubes I located a tube Connector. That is what the shop manual calls it. I thought I was a proportioning valve, but it does not appear to be anything more that a connection fitting that take input from the master cylinder and provides fluid to the two front wheel cylinders and the one line that goes back to the fitting on the rear axle. Is this correct? Using this type of braking system would you have a total braking system failure if you happen a get a broken wheel cylinder or damaged brake line? Am I missing something here . I am new at this so and learning every day.
Laughing Gas
Joined: Dec 2005
Posts: 904
Likes: 115
From: Laurel, MS
If you are using the stock single reservoir master cylinder then, yes, you would loose all brakes if your blew out a wheel cylinder, hose, etc.
This is why starting in 1967 all vehicles were required to go to dual reservoir master cylinders so you would loose only front or only rear brakes depending on where the failure occurred.
Many people retrofit dual reservoir master cylinders on older vehicles for this reason.
Personally, I'm still running the single reservoir master cylinder on my '61 F100 at the moment, but it is something I'd like to change in the future.
This is why starting in 1967 all vehicles were required to go to dual reservoir master cylinders so you would loose only front or only rear brakes depending on where the failure occurred.
Many people retrofit dual reservoir master cylinders on older vehicles for this reason.
Personally, I'm still running the single reservoir master cylinder on my '61 F100 at the moment, but it is something I'd like to change in the future.
Believe Nothing
Joined: Jun 2004
Posts: 7,514
Likes: 398
From: W. Central FL.
That is why they called the secondary brake system an emergency brake back then. Very important that the single system be 100% and kept that way.
Remember, the basic law of hydraulics says something like a "liquid under pressure is transmitted with equal force in all directions"........ and if there is a hole in the system that force will push fluid out of the hole.
Remember, the basic law of hydraulics says something like a "liquid under pressure is transmitted with equal force in all directions"........ and if there is a hole in the system that force will push fluid out of the hole.
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