4511 Brake Cylinder parts

[Bruce Parker (RIP)]

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?

[Lynn Eades]

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.

[gjamo]

https://www.ebay.com.au/sch/i.html?_...inder&_sacat=0

[Tony Smith]

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.

[rob love]

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.

[Hanno Spoelstra]

This is where I bought them locally: https://histoparts.com/rear-wheel-cylinder-repair-kit/3

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