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Old 07-24-2021, 03:49 PM   #1
fordfixer
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Default Master cylinder

I have a club member with hydraulic brakes on and a Model. All early Ford parts. I installed a new master cylinder, but I have a leak at the copper washer. Where can I get a new one? MAC s list it, but doesn’t have it, has no idea when, because made in China. Napa lists it but the same thing Any help would be grateful.
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Old 07-24-2021, 04:41 PM   #2
Bob C
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Default Re: Master cylinder

Try annealing it, it may be to hard to seal.
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Old 07-24-2021, 05:13 PM   #3
fordfixer
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Default Re: Master cylinder

Thanks, I will if I can’t get a new one. Which is preferred.
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Old 07-24-2021, 05:50 PM   #4
Karl Wolf
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Default Re: Master cylinder

Harley Davidson uses these.
Size may be an issue.
Try an aftermarket car parts store?

Karl
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Old 07-24-2021, 06:06 PM   #5
Ggmac
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Default Re: Master cylinder

Harbor freight has an assortment box .
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Old 07-24-2021, 08:28 PM   #6
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If you have a Dremel tool, you can make one from a penny if you can find a copper one.
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Old 07-25-2021, 12:47 PM   #7
38coop
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Default Re: Master cylinder

I had the same problem on my 49. Tried two washers instead of one and it stopped my leak.
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Old 07-25-2021, 03:45 PM   #8
fordfixer
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Default Re: Master cylinder

We’re these hard washers? I thought they used soft ones.
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Old 07-25-2021, 04:54 PM   #9
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Default Re: Master cylinder

You need to anneal the copper washer to soften it so that it will seal. Heat it to a cherry red color and quench it in a bucket of cold water.
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Old 07-26-2021, 06:52 AM   #10
38coop
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Default Re: Master cylinder

I used the hard ones that i bought at NAPA. The old style soft ones are hard to find. Mike at 3rd GEN gave me the tip to try two washers.
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Old 07-26-2021, 07:18 AM   #11
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Default Re: Master cylinder

I have also found new washers are in many cases too hard and need to be annealed.

Just heat them up red hot and quench or let air cool, either way works.

Guessing globally sourced copper washers are manufactured differently then the old washers we used to get.

I usually anneal and reuse the old washers at the banjo fittings as they seem to be a size not to be found at day-to-day parts stores.
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