Log truck and trailer brakes

AA Ford Discussion Group relating to the repair and restoration of your AA Ford.
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wild4679
Posts: 47
Joined: July 8th, 2017, 7:14 am
Body Type: 82B
Model Year: 1931

Log truck and trailer brakes

Post by wild4679 » July 31st, 2018, 7:33 am

I'm considering building a log truck, using a '31 AA cab/chassis/running gear. Before jumping off on this, I have some questions. What brake linkage system was used for semi-trailers in the 1930-31 era? And, what wheelbase should I use for the cab/chassis?

Bob C
Posts: 1196
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: Log truck and trailer brakes

Post by Bob C » July 31st, 2018, 8:30 am

I think your best bet would be vacuum operated mechanical brakes.

Bob
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KimVanOrder
Posts: 469
Joined: August 11th, 2013, 4:25 pm
Body Type: 82-A Platform
Model Year: 1928
Location: Hamilton, Mich.

Re: Log truck and trailer brakes

Post by KimVanOrder » July 31st, 2018, 3:41 pm

I wonder if that company is still in business? May be fun to try order one!! Show them that sales sheet!! :lol:
KVO
Dec. '28 AA

Stakebed
Posts: 1172
Joined: June 14th, 2007, 7:29 pm
Body Type: Grainbox
Model Year: 1929
Location: Illinois

Re: Log truck and trailer brakes

Post by Stakebed » July 31st, 2018, 4:02 pm

Just a heads up - depending on your state antique or not you may need a CDL to drive it...

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Chris Haynes
Posts: 2005
Joined: September 7th, 2003, 5:18 pm
Body Type: 82A
Model Year: 1930
Location: North Hills, CA/ Pine Grove, CA

Re: Log truck and trailer brakes

Post by Chris Haynes » July 31st, 2018, 6:54 pm

double post
Last edited by Chris Haynes on August 1st, 2018, 11:34 am, edited 1 time in total.

User avatar
Chris Haynes
Posts: 2005
Joined: September 7th, 2003, 5:18 pm
Body Type: 82A
Model Year: 1930
Location: North Hills, CA/ Pine Grove, CA

Re: Log truck and trailer brakes

Post by Chris Haynes » July 31st, 2018, 6:57 pm

KimVanOrder wrote:
July 31st, 2018, 3:41 pm
I wonder if that company is still in business? May be fun to try order one!! Show them that sales sheet!! :lol:
Fruehauf went out of business in 1989. https://www.singingwheels.com/what-happ ... mpany.html

wild4679
Posts: 47
Joined: July 8th, 2017, 7:14 am
Body Type: 82B
Model Year: 1931

Re: Log truck and trailer brakes

Post by wild4679 » July 31st, 2018, 10:21 pm

Thanks for the advice, gentlemen. I'm assuming that in the era of the Model A's and mechanical brakes, semi trailers simply did not have brake axles. Is this a fair assumption?

Also, when choosing a chassis to build a log truck project (or any truck with a fifth wheel to pull a semi-trailer), would you choose a 131.5 inch wheelbase or a 157 inch?

bud valerius
Posts: 321
Joined: May 14th, 2004, 5:24 am
Model Year: 1930
Location: Manhattan , Kansas

Re: Log truck and trailer brakes

Post by bud valerius » August 1st, 2018, 5:34 am

I have a vacuum operated brake system for mechanical brakes I might consider selling

Stakebed
Posts: 1172
Joined: June 14th, 2007, 7:29 pm
Body Type: Grainbox
Model Year: 1929
Location: Illinois

Re: Log truck and trailer brakes

Post by Stakebed » August 1st, 2018, 6:55 am

wild4679 wrote:
July 31st, 2018, 10:21 pm
Thanks for the advice, gentlemen. I'm assuming that in the era of the Model A's and mechanical brakes, semi trailers simply did not have brake axles. Is this a fair assumption?

Also, when choosing a chassis to build a log truck project (or any truck with a fifth wheel to pull a semi-trailer), would you choose a 131.5 inch wheelbase or a 157 inch?
Do you plan to haul logs with it? if so longer the wheelbase the more stable it is under braking (wont jackknife as easily) but also increases turning radius and physical space it takes up. Most vintage pics ive seen of AA semis is the standard 131.

Also this site would be a great rescource for all that legality stuff and trailer brake questions id imagine as well

https://aths.org/

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