Everybody has to deal with this problem
First, this question has been asked and answered in the past so use the search feature and read the past responses. However, as rebuilding the brakes on HUP, or CMP is something that each of us has or will have to do. The following are a couple of thoughts.
• The brake cylinders are still available as NOS or reproduction parts, cost is similar to comparable parts on a modern truck or cheaper.
• There even have been new or NOS complete cylinders listed on e-bay in the last few weeks.
• Check the previous posts for part numbers.
• If your adjustable ends are in good condition and the cylinders are pitted then think about having them sleeved. I had mine done in brass years ago by Whitepost and they have lasted much longer than the NOS ones I had installed before.
• Be careful of NOS the rubber cups and caps (front brakes) should be replaced with new cups and caps which are available boxes of ten I believe.
• In addition, if you are going to do the brakes if possible do the entire system at one time, keeps the dirt from contaminating the new parts.
• Replace all of the rubber lines and take a real hard look at your steel lines particularly the side toward the frame. Look for pitting.
Hope this helps and good luck.
PS I’ll be doing a complete brake job on my Pattern 12 C60L this winter.
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