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Wheels, Tires, Suspension and Brakes Keep them doggies rollin', rawhide

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  #1  
Old October 3rd, 2019, 03:26 PM
62Burb 62Burb is offline
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Default 1963 Suburban brake power cylinder malfunbcrion

My '63, Coral, is finally on the road and running pretty nice. Main issue at this point is that the power assist brakes aren't power assisting; a completely manual feel to it. My mechanic checked out the entire brake system as part of my annual inspection, and determined that the "C-3104 Power Cylinder" (located under the truck) "had a failed internal part resulting in an oil leak - maybe a bad diaphragm?". I can't find a reference to this part anywhere on the web; anyone familiar with this part, and a solution? I'd prefer to keep the truck in original condition, which would mean a re-build if I can find someone to do it.

Brad
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  #2  
Old October 3rd, 2019, 09:54 PM
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Funky61 Funky61 is offline
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Default Re: 1963 Suburban brake power cylinder malfunbcrion

I found this link about a rebuilder

https://brakeboosterrebuild.com/about/
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Old October 4th, 2019, 11:37 AM
62Burb 62Burb is offline
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Default Re: 1963 Suburban brake power cylinder malfunbcrion

I'll check that out, thanks.

Brad
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Old October 4th, 2019, 08:50 PM
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Default Re: 1963 Suburban brake power cylinder malfunbcrion

The power cylinder is just your average hydraulic cylinder. A good hydraulic cylinder shop that works on construction equipment and such will have the o-rings and seals and will rebuild it. The company mentioned seems to be focused on the booster on the firewall.

Find a good old fashioned local hydraulic cylinder rebuild shop. Go there, take the cylinder, let them see it and look at the place.
I would NOT want to ship it off, you may never see it again.

The Ram (power cylinder) is available new because they were used on older Chevy full size and Corvettes.

Napa may have you covered with a cylinder rebuild kit, hoses or a new Ram. I searched 1963 Corvette for NAPA part. The rebuild with the seal kit ($10) can be an easy DIY project if you watch a few cylinder rebuild videos.

Here is a good thread from our Archives.

Be advised however, I am not familiar with the word "malfunbcrion"

Last edited by AZKen; October 5th, 2019 at 01:21 AM.
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Old October 6th, 2019, 11:37 AM
62Burb 62Burb is offline
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Default Re: 1963 Suburban brake power cylinder malfunbcrion

[/QUOTE] advised however, I am not familiar with the word "malfunbcrion"[/QUOTE]


So my inspection mechanic and I misunderstood each other over the phone. The power brake booster unit is vacuum assist, and is mounted on the firewall. IT was a vacuum leak from that that was detected. According to the manual, it is a "Hy Power" unit, apparently made by Delco. Anyone familiar with the unit, and rebuilding prospects? The vehicle stops with significant leg pressure but I'd like to see it returned to designed level of function.

Brad
Attached Images
File Type: jpg Hey Power power cylinder.jpg (2.70 MB, Multiple views, 6 clicks)
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Old October 6th, 2019, 02:43 PM
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Funky61 Funky61 is offline
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Default Re: 1963 Suburban brake power cylinder malfunbcrion

Brad, the link I posted mentions and has a picture of a Midland-Hy unit.
I’d call them for more information.
Attached Images
File Type: jpeg C29B44B4-026B-4A45-94C8-EDB19D95B5C8.jpeg (20.3 KB, Multiple views, 3 clicks)
File Type: jpg midland hy.jpg (173.1 KB, Multiple views, 8 clicks)
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Last edited by Funky61; October 6th, 2019 at 03:04 PM. Reason: added photo
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Old October 6th, 2019, 07:39 PM
62Burb 62Burb is offline
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Default Re: 1963 Suburban brake power cylinder malfunbcrion

That sure looks like the one!
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Old October 7th, 2019, 03:27 AM
snazzypig snazzypig is offline
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Default Re: 1963 Suburban brake power cylinder malfunbcrion

Could also be a Bendix Hydrovac. My 62 had one.
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  #9  
Old October 7th, 2019, 11:15 AM
62Burb 62Burb is offline
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Default Re: 1963 Suburban brake power cylinder malfunbcrion

Funky61 nailed it; I found "Midland" stamped on the body.

Brad
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Old October 9th, 2019, 12:24 AM
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Default Re: 1963 Suburban brake power cylinder malfunbcrion

Yes, if it is the booster........back to Funky's link.
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