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Old 05-10-20, 05:16
Malcolm Towrie Malcolm Towrie is offline
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Default New master cylinder for HUP

We needed a new master cylinder for our HUP restoration. The old one had a badly corroded bore. I agree resleeving is the way to go, but money is tight for a museum in these Covid times. So one was ordered from LWD in Holland. We ordered the wrong one. It did not have the bottom mount design of the original, the bore was 1-1/8", not 1-1/4", and the piston had a much deeper hole for the actuating rod than the original. I can live with all of these discrepancies so we used it.

Searching showed the bottom mount design is now hen's teeth rare and I can see why. Not only because of the unusual bottom mount, but the two feet are different heights to angle the m/c to suit the pedal mount! GM's buying power, I guess.

We made an adapter to allow fitting the side-mount m/c to the bottom-mount frame bracket. And I figure the 1-1/8" bore giving a bit more brake pressure for a bit more pedal travel is a reasonable compromise.
The deeper rod hole in the piston was filled with a machined rod, so we now have a working m/c.

Now onto finding rear wheel cylinders that have starwheel adjusters, because the popular 4511 replacement cylinders don't!

Malcolm

Last edited by Malcolm Towrie; 07-10-20 at 00:10.
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Old 05-10-20, 06:28
Tony Smith's Avatar
Tony Smith Tony Smith is offline
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Quote:
Originally Posted by Malcolm Towrie View Post
Now onto finding rear wheel cylinders that have starwheel adjusters, because the popular 4511 replacement cylinders don't!

Malcolm
Search ebay for "Cylinder 9325".
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Old 05-10-20, 07:20
Malcolm Towrie Malcolm Towrie is offline
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Thanks, Tony. Good to know there are still starwheel options. That part number is a 1-3/8" bore rather the the 1-1/2" bore that's spec'd for the rear, which may not be a big deal. Do you have a number for 1-1/2"?
Also the $200 Canadian each is going to cause some consternation. I need to confirm we absolutely need a starwheel adjuster or if there's another way of adjusting the cylinder.

Malcom
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Old 05-10-20, 07:32
rob love rob love is online now
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Amazon.ca lists them for $103. https://www.amazon.ca/Raybestos-WC93.../dp/B000FFR01M
Personally, being a Ford man, I can't confirm the application.
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Old 05-10-20, 08:24
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Tony Smith Tony Smith is offline
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Originally Posted by Malcolm Towrie View Post
Thanks, Tony. Good to know there are still starwheel options. That part number is a 1-3/8" bore rather the the 1-1/2" bore that's spec'd for the rear, which may not be a big deal. Do you have a number for 1-1/2"?

Malcom
Just going on Bruce Parker's info: HERE
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