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Discussion Forum

Difference in B B-CA

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Will M

11-16-1999 17:38:38

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Please explain to me what the difference between a B & B-CA is. I have recently purchased an Allis Chambers 1939 (?) and it has the B and a CA emblem on it. Is there such a model?

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11-17-1999 08:15:26

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 Re: Difference in B B-CA in reply to Will M, 11-16-1999 17:38:38  
Go to the Article Archives on this site and read the article about "The Little AC's". A quick way to tell the difference between the CA and the B or C is that the CA had 4 foward gears.

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Phil Auten

11-17-1999 04:24:03

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 Re: Difference in B B-CA in reply to Will M, 11-16-1999 17:38:38  
I suspect that a previous owner added a CA decal to your B, possibly because he transplanted a CA engine into it. To my knowledge there was no B-CA tractor from A-C. In '39 the engine in a B would've been the 116 ci version and the CA used the 125 ci version of the same engine with about 10 more HP.


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11-17-1999 04:47:15

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 Re: Re: Difference in B B-CA in reply to Phil Auten, 11-17-1999 04:24:03  
If you know for certain its a '39, its a B. The C began production in '40 to '49 and was replaced with the CA in '50. The B was produced from '37 to '59 and was a one row tractor always with a wide front. Most were built with a non adjustable fron axle, however, an adjustable was offered. Hydraulic lift was an option but this was only a lift lower setup. The C is basically the same tractor with about 10 more hp and was a two row model with more implements designed for it and also could choose from single front wheel, dual front, or wide front. The CA was a jazzed up C with power adjust rear wheels, same front end options, and had traction booster hydraulics like a WD. It also had a hand clutch which provided a live pto, and 2 or 3 more hp. Hope this answered your questions, Brian.

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