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Old 11-05-22, 18:29
Bruce Parker Bruce Parker is offline
GM Fox I
Join Date: Feb 2003
Location: SW Ontario, Canada
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Default 4511 Brake Cylinder parts

Can anyone tell me if rebuild kits or even just the rubber cups are available for CMP 4511 wheel cylinders as used on 15cwt rears and all four on 60cwts? Is there a modern part number?
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Old 11-05-22, 21:03
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Lynn Eades Lynn Eades is offline
Join Date: May 2003
Location: Tauranga, New Zealand
Posts: 5,445

Bruce are you talking about the 1 3/8" cylinders?
For the 1 1/2" cylinders, I recall the cups were available, I just couldn't find the correct boots. (here in N.Z.) I then bought new cylinders from the USA. Rob L. put me on to the part numbers and the supplier.

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Old 12-05-22, 08:49
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gjamo gjamo is offline
Graeme Jamieson
Join Date: Feb 2003
Location: Williamstown Vic Australia
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Default Wc4511
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Old 12-05-22, 10:21
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Tony Smith Tony Smith is offline
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Location: Lithgow, NSW, Australia
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I think the modern move to "Throw the old one out and get another off the shelf" attitude amongst parts suppliers means that components like cups and boots (either separate or in a rebuild kit) are no longer supplied. They assume that bringing the cost down by having the whole assembly made in "some other country" is more economical than reconditioning used parts.

Doesn't just apply to brake parts. I'm seeing the same with Alternators/Starter motors, Carburettors, even radiators. The cost of an aftermarket assembly is aimed to be cheaper than a rebuild kit and the labour to recondition it.
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Old 12-05-22, 13:12
rob love rob love is offline
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Join Date: Feb 2003
Location: Shilo MB, the armpit of Canada
Posts: 7,254

If you just want cups, they are cheap enough and NAPA still carry them. It's the proper boots that will be the challenge.

New cylinders are $50 Cdn from Rock auto, and their shipping is relatively quick and cheap. For that $50 you get a part that is in specification and will last a lot of years. Personally, I have always found rebuilds, including ones from jobbers, to only last about half as long.

When you put it into perspective, the $100 to replace the two cylinders is less than it will cost you to top up your fuel tank these days, and about the same cost as taking the wife out to the Keg for dinner.
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Old 12-05-22, 14:43
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Hanno Spoelstra Hanno Spoelstra is offline
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Join Date: Feb 2003
Location: The Netherlands
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Default Oem: 91t-2128

This is where I bought them locally:

Histoparts sources most of their inventory from the big suppliers in the USA, incl. Mac’s and Dennis Carpenter
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