28/29 brake hub

AA Ford Discussion Group relating to the repair and restoration of your AA Ford.
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s147881
Posts: 340
Joined: April 13th, 2007, 8:09 pm
Body Type: stake bed 82A
Model Year: 1930
Location: Decatur Michigan

28/29 brake hub

Post by s147881 » February 11th, 2018, 10:27 am

Has anyone had the rear brake hubs turned. My right one is in great shape but the left rear has a lot of rust and pitting. I disassembled the bearing center from the hub but not sure how or who turns these. Any advice or direction would be greatly appreciated. Also - If someone has an extra brake hub (left) that they would like to sell - I would be interested. Thanks

Bob C
Posts: 1131
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: 28/29 brake hub

Post by Bob C » February 11th, 2018, 11:23 am

Are you looking for a hub or brake drum??

Bob

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s147881
Posts: 340
Joined: April 13th, 2007, 8:09 pm
Body Type: stake bed 82A
Model Year: 1930
Location: Decatur Michigan

Re: 28/29 brake hub

Post by s147881 » February 11th, 2018, 2:34 pm

Brake drum.

flatford39
Posts: 433
Joined: September 24th, 2009, 3:06 pm
Body Type: Express
Model Year: 1928
Location: NE Illinois

Re: 28/29 brake hub

Post by flatford39 » February 11th, 2018, 3:52 pm

These are steel drums right??? I don't think you turn them like you can the cast iron drums. There isn't enough meat in them to cut out.

KimVanOrder
Posts: 414
Joined: August 11th, 2013, 4:25 pm
Body Type: 82-A Platform
Model Year: 1928
Location: Hamilton, Mich.

Re: 28/29 brake hub

Post by KimVanOrder » February 11th, 2018, 5:06 pm

Has anyone or could someone install a 'sleeve' to restore one?
KVO
Dec. '28 AA

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Chris Haynes
Posts: 1945
Joined: September 7th, 2003, 5:18 pm
Body Type: 82A
Model Year: 1930
Location: North Hills, CA/ Pine Grove, CA

Re: 28/29 brake hub

Post by Chris Haynes » February 11th, 2018, 11:13 pm

Perhaps metal spray on more metal then turn back to stock?

KimVanOrder
Posts: 414
Joined: August 11th, 2013, 4:25 pm
Body Type: 82-A Platform
Model Year: 1928
Location: Hamilton, Mich.

Re: 28/29 brake hub

Post by KimVanOrder » February 12th, 2018, 4:02 pm

Chris Haynes wrote:
February 11th, 2018, 11:13 pm
Perhaps metal spray on more metal then turn back to stock?
I wouldn't trust spray on metal. In may past life I have seen it delaminate. Press in and weld a .100" thick sleeve and turn to true it up. That is what I would do. (and keep an eye open for another one)..
KVO
Dec. '28 AA

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s147881
Posts: 340
Joined: April 13th, 2007, 8:09 pm
Body Type: stake bed 82A
Model Year: 1930
Location: Decatur Michigan

Re: 28/29 brake hub

Post by s147881 » February 12th, 2018, 4:50 pm

Took drum to my machinist and I believe it is to thin to turn. Heavily pitted and would need to turn down to .130 to clean up. Also he estimated 2-4 hours machining time with setup - 120.00 to 240.00 dollars. I told him I would look for better hub.

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tiredtruckrestorer
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Joined: April 20th, 2003, 7:09 pm
Model Year: 1931
Location: Orwigsburg, PA

Re: 28/29 brake hub

Post by tiredtruckrestorer » February 12th, 2018, 8:17 pm

Cast drums can be cut on a lathe, but steel drums like most original A and AA used were pressed steel. To true up a pressed steel drum they should be ground on a drum grinding machine. The machinist was right, it can take around four hours to do one. I found an old truck brake drum grinding machine and set it up to grind the larger AA drums. If they are pitted bad there is not much material there to grind out pits though. I found that usually the 30-31 front drums are usually better candidates to regrind for the rear. I realize you can't do that with the 28-29 front drums as they are smaller than the rears. There were a couple of different depths to the rear drums too, depending on whether the truck had e-brakes or not, or they were used on the bevel gear rears.

It makes a difference when the the drums are trued, woven lining used and arced to fit the trued drums.

Keith

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