1 ton or 2 ton?

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KimVanOrder
Posts: 753
Joined: August 11th, 2013, 4:25 pm
Body Type: 82-A Platform
Model Year: 1928
Location: Hamilton, Mich.

1 ton or 2 ton?

Post by KimVanOrder »

I saw in Macs they have bushings for the front rear spting hangers in two sizes. So how do I tell what tonage truck I have? Rear spring has 16 leaves. Thanks for any help.

KVO
KVO
Dec. '28 AA
Bob C
Posts: 1442
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: 1 ton or 2 ton?

Post by Bob C »

All the AA's are 11/2 ton.

Bob
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tiredtruckrestorer
Posts: 338
Joined: April 20th, 2003, 7:09 pm
Model Year: 1931
Location: Orwigsburg, PA

Re: 1 ton or 2 ton?

Post by tiredtruckrestorer »

Macs catalog isn't right. The bushing listed as AA5791 as a rear spring shackle bushing is really the AA5781 spring leaf end bushing and four are used, one at each end of each rear spring. The bushing listed as BB5791 is the top shackle bushing but only 4 are required for the AA's and 8 for the BB's. Part number BB5791 was formally AA5791.

Keith
drtrcrV-8
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Joined: October 16th, 2013, 9:22 am
Body Type: open
Model Year: 1928

Re: 1 ton or 2 ton?

Post by drtrcrV-8 »

I'm gonna ask Neil for a "Coaches call" on this question, as I was under the impression that Ford AA trucks with 2 wheel rearends were 1 1/2 ton & that 4 wheel rearends("duallys") were 2 1/2 ton, & that those ratings were from the Ford Factory & apparently based on tire capacity. We all have seen many examples where the frames,springs, & running gear were regularly overloaded way beyond those ratings by later owner/users!
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Neil Wilson
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Body Type: 82-A/89-A
Model Year: 1930
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Re: 1 ton or 2 ton?

Post by Neil Wilson »

It have been my belief that the 1 1/2 ton rating was based on the springs. But, I think someone posted a reference to the Ford service bulletins regarding a rating of 2 tons based on some factor (don't remember where the post is).

Once enough weight is piled onto an AA, the frame bumpers rest on the axle. At that point there is basically no suspension. So, its up to the tires hold the excess weight.
Regards, Neil Wilson
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1crosscut
Posts: 877
Joined: December 25th, 2010, 7:22 pm
Body Type: 82-A
Model Year: 1929
Location: Lincoln, NE

Re: 1 ton or 2 ton?

Post by 1crosscut »

Perhaps the two ton rating was with the optional overload springs.
Dave
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