45 HUP Wheel Cylinder Restoration

[RHClarke]

Now that I managed to remove my wheel cylinders (thanks, Mike) I would like to restore them to orginal specs. Anyone out there with experience in restoring 45 HUP adjustable wheel cylinders? If so, how did you go about the project? Where did you get parts? Any other info would be appreciated!

Cheers,

[Phil Waterman]

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.

[cmperry4]

Brake parts is something that's been on my mind also as winter looms - I searched and found Hanno Spoelstra's Feb 2003 post where he lists the p/ns for all cylinders and hoses, but the Caldwell list is, I gather an Excel format which, I as an elitist Mac user can't view. Has anyone got around to rendering this in pdf or some format readable on all platforms?

[Keith Webb]

Originally posted by cmperry4
Brake parts is something that's been on my mind also as winter looms - I searched and found Hanno Spoelstra's Feb 2003 post where he lists the p/ns for all cylinders and hoses, but the Caldwell list is, I gather an Excel format which, I as an elitist Mac user can't view. Has anyone got around to rendering this in pdf or some format readable on all platforms?

Good on you, Mark - another Mac user - and a purist to boot if you don't have MS (shudder) Office.

It's obviously the politically incorrect thing to be a Mac user. I love 'em!

If it's sent to me I can .pdf it for you. Just send me an email through the forum with your address and the file.

[cmperry4]

Hi Keith - thanks for the offer, the Caldwell .zip file is hereby attached.

Macs rule indeed - just now waiting for my new G5 iMac (20" display) to arrive. eMac was nice to have, but ... you know.

Cheers

[Hanno Spoelstra]

Originally posted by cmperry4
the Caldwell .zip file is hereby attached

Go to Modern part numbers for CMPs to download the file. I've deleted it from your post to save server space, sorry.

H.

[Keith Webb]

Originally posted by cmperry4
Hi Keith - thanks for the offer, the Caldwell .zip file is hereby attached.

Macs rule indeed - just now waiting for my new G5 iMac (20" display) to arrive. eMac was nice to have, but ... you know.

Cheers

Excellent - I have quite a few various Macs used for editing and graphics. This is being written on a 17" Powerbook.

As for the file, you can find it here

[RHClarke]

I did a search of MLU (new and old) and found tidbits here and there on brake disassembly etc...Over the lunch hour I found a URL for an online 1942 - 1947 Chevrolet Shop Manual. See http://chevy.tocmp.com/1942_47shop/index.htm for some helpful photos and instructions.

Thanks, Phil, for the assistance.

R

[Phil Waterman]

Good find. Seems that no mater how many times you search the web you can always find something new or something that has been there and you just didn't hit it.

Was surprized how fast the pages load.

Strange that the url would be http://chevy.tocmp.com
The Old Car Manual Project

[RHClarke]

Apologies to Wm Shakespere. The URL name got me chuckling over the coincidence.

R

[cmperry4]

Ouch

[hairbear]

have you thought about using silicone fliud ,it dasn,t abosorb water

[Euan McDonald]

Originally posted by hairbear
have you thought about using silicone fliud ,it dasn,t abosorb water

Warning related to the use of silicone fliud, I spent $500 dollars on the brake system in my C15A with stainless steel sleves new brake shoes & pipes to find the silicone reacted with the new rubber wheel cylinder & master cylinder cups. The system would not hold fliud so I had to replace all the rubbers & flush the system with regular fluid. 16 years later & the system still works good.
Euan.

[rob love]

There were some compatibility problems with the early silicone brake fluids, I believe the change date was in the mid to later 80's. Any fluid with batch dates in the 90s and later will work fine. It is unfortunate that silicone earned a bad rap early in it's history, and it is a tough stigma to shake.
In the mid 80's the Cdn military started touting it as the revolution in brake systems, and within a month or two we had quarantined all the assets, and had to do tests on vehicles to find out if they had the SBF in them. Of course, since the army buys the stuff a million gallons at a time, the jugs of old stuff can still be found, and problems still occur from them.

[Bob Carriere]

Being very busy at the office I just stumbled on this site..... check out the on line catalogue... they have your break...brake cyl. and repair kits........ and pictures to boot...!!!!

WWW.fillingstation.com

Let us know if the pictures match what is on the HUP......

Hang in there....Spring is coming

[Phil Waterman]

If you are having the cylinders sleeved check with the company doing the sleeving. Whitepost Restorations the company I used recommended against the silicone because it would leak between the sleeve and the cylinder. I’ve been using heavy duty brake fluid in mine with out problems for a good many years.

The bigger brake problem seems to be with lack of use. When I used to put my HUP up on blocks for the winter, in a friends barn, I was all ways having problems with the brakes leaking or weeping. Since I’ve been garaging them here at home and driving them in and out of the shop every couple of weeks not problems.

For health brakes the doctor recommends regular exercise. Have you driven your CMP this week?

[khardy]

Hi All,

Your vehicles are totally out of my league. Do have a few friends that rebuild old U.S. Military vehicles.

Anyhow, here is a link for 1949 Delco Brakes Service Manual: http://chevy.tocmp.com/1949brakes/index.htm

In several earlier posts, there was mention about the site I maintain, http://chevy.tocmp.com This site is for a lot of Old Chevrolet manuals and has been expanding over the last couple of years.

The comparision made to The Old Car Manual Project http://tocmp.com would be correct. This site is an extension of TOCMP.

The owner of the Old Car Manual Project has allowed me to add all the online manuals onto his server. We have been in communication for the last four years and have basically the same objectives. If you look on the main page of the Old Car Manual Project, http://tocmp.com and to the left of the page, you will see a link to the Chevy Manuals. Also, on this same page and farther down, Rusty has an explanation as to my moving all the manuals to his server. Kind of hard to find 600+ mb of server space cheap.

There are over 2400 pages of info on this site for the Chevys.

Hope this explains the web address and maybe they might be a reference that can help with your vehicle preservation.

Take Care and Happy Holidays!
Keith Hardy

[Phil Waterman]

Originally posted by Bob C.
Being very busy at the office I just stumbled on this site..... check out the on line catalogue... they have your break...brake cyl. and repair kits........ and pictures to boot...!!!!

WWW.fillingstation.com

Let us know if the pictures match what is on the HUP......

Hang in there....Spring is coming

Good find Bob - I went through thier online catalog searched 1941 truck and found 1005 listings among the listing are new brake cylinders and and rebuild kits.

[Bob Carriere]

Hi Phil

Best thing about this site are the wonderful pictures of parts.... really helps ID components ......Since I stumbled on this fillingstation.com site during a quiet moment at my government job........

One could say that the service was provided free of charge compliment of the Canadian Federal Government..... your tax dollar at work.....

All the Best for the Xmas Holidays..

[Jonnie]

Originally posted by khardy
Hi All,

SNIP

Hope this explains the web address and maybe they might be a reference that can help with your vehicle preservation.

Take Care and Happy Holidays!
Keith Hardy

Hi keith,

Nice to see another Yank, even in Florida as I!

Jonathan Lewis

[cmperry4]

Just realized I didn't properly thank Keith for the link to the parts list - Thanks!