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Posted By: OlBlue 52-59 Dual Wheel front disk brake - Sun Apr 27 2014 06:47 PM
This is on a '56 GMC 1-Ton.

'56 1-ton disk brake conversion
Posted By: Dan Bowles Re: 52-59 Dual Wheel front disk brake - Mon Apr 28 2014 03:38 AM
Interesting I wondered if that couldn't be done the other day. Less wheel rub issue maybe. I wonder what brakes were used.
Posted By: OlBlue Re: 52-59 Dual Wheel front disk brake - Mon Apr 28 2014 11:09 PM
Chevy 3/4 ton K series (4x4) front brakes

'71-'86 3/4 ton K series rotors
'71-'78 3/4 ton K series calipers & brake lines

Later calipers went to metric size hose connection.
Posted By: duesenberg1 Re: 52-59 Dual Wheel front disk brake - Tue Apr 29 2014 04:50 AM
Where did you get the bolt spacers and rotor spacers? Why did you not just go with larger bolts through the rotor and drill the hub? Is the center ring even necessary?
Posted By: OlBlue Re: 52-59 Dual Wheel front disk brake - Tue Apr 29 2014 04:48 PM
A local machine shop made the parts for me.

Larger bolts with larger nuts would interfere with the outer diameter of hub casting just inboard of the brake flange.

The ring keeps the rotor concentric with the hub.

I checked the clearance between the rotor bolts in the original application and the the rotor bolt hole diameter and found it pretty loose. It looked like the factory used the center bore to keep it centered so I just did the same.
Posted By: duesenberg1 Re: 52-59 Dual Wheel front disk brake - Tue Apr 29 2014 05:52 PM
What is the thickness of the steel plate?
Posted By: duesenberg1 Re: 52-59 Dual Wheel front disk brake - Tue Apr 29 2014 06:50 PM
What size bolts for rotor?
Posted By: OlBlue Re: 52-59 Dual Wheel front disk brake - Tue Apr 29 2014 11:33 PM
The plate is 1/2 cold rolled steel. The mounting tab on the bottom is offset 1/2" using a piece of 1/2" square stock welded between the tab and the main plate.

When I had the plate cut, I made the tab 1/2" longer so that it would overlap the main plate. I bolted the main plate to a spindle and the tab where it went and then placed the piece of square stock in between and tack welded it. There are 4 separate beads of weld holding the tab on so I don't think it will go anywhere.

The bolts holding the rotor on are the same thread size as the studs that held the drum on but longer to fit the rotor.
Posted By: Howies551Ton Re: 52-59 Dual Wheel front disk brake - Sun May 04 2014 07:55 PM
John, Have you considered selling the unique parts that you have designed. I would be interested in purchasing a "adapter" parts kit. My 55 1 Ton would be a perfect candidate for upgrading.

Thanks in advance. Howie near Calgary
Posted By: duesenberg1 Re: 52-59 Dual Wheel front disk brake - Fri May 09 2014 02:55 PM
Do you have any dimsioned drawings for the mounting plates. CAD drawings etc.
Posted By: OldDawg Re: 52-59 Dual Wheel front disk brake - Fri May 09 2014 04:19 PM
Yep, I'd be interested as well. Looks like a well thought out job, thanks for sharing!
Posted By: VEW Re: 52-59 Dual Wheel front disk brake - Wed Dec 03 2014 06:56 PM
Starting to work on the '59 now, as Chief has been sitting waiting patiently long enough. Saw this thread about converting the disc brakes. Are there any updates to this that anyone knows about?

Saw somewhere that someone makes a bracket for AD, but don't know about TF.

Thanks for you help.
Posted By: mikec4193 Re: 52-59 Dual Wheel front disk brake - Fri Dec 05 2014 07:58 PM
http://www.hollisterroad.com/

I think the link above should be a lot of help in your search for a braking system.

MikeC
Posted By: VEW Re: 52-59 Dual Wheel front disk brake - Fri Dec 05 2014 09:33 PM
Thanks alot MikeC...exactly what I was looking for.

Have you or do you know anyone that has used this kit?
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