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Allis Chalmers Discussion Forum

Early and late B

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03-19-2008 18:20:17

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OK, aside from different front rims and hand brakes, what are other differences between early and late model Bs???

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Andrew Z

03-20-2008 11:56:00

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 Re: Early and late B in reply to Lanse, 03-19-2008 18:20:17  
I have a 38B serial #2053 Also... cast front hubs, the clutch pedal is made diffrent than latter ones, monting holes for frame weights are not present, steering boxes them selves are diffrent (i think not sure on that),non pressurized cooling system used (no thermastat in them) the others have said the rest


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03-19-2008 19:16:40

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 Re: Early and late B in reply to Lanse, 03-19-2008 18:20:17  
the B started in 1937 and ran thru 1958. Almost all parts are interchangeable. Most parts are also interchangable with the C model, except the steering box and final drive internal parts. THe first B did not have elect start or generator untill mid 1941. Was optional for a while. Foot brakes untill mid 1941. You could get the wish bone, or the straight alxe. It was an option for many years. In the first few years it had a BE 116 inch motor. About 1942 it got the 125 inch CE motor, same as the model C. Late 50s after the CA came out, the B got theCA torque tube with mounting bosses built in. Eary B had 1-1/8 pto shaft, later had 1-3/8 shaft.

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03-19-2008 19:13:59

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 Re: Early and late B in reply to Lanse, 03-19-2008 18:20:17  
The arched front axle was std equipment from 1938 until 1957. the adjustable front axle was optional. early engine was a BE at 116 cu in. around 42 they went to the CE engine at 125 cu in.appearances didn't change much, but minor changes were made, std front wheels in 40, wider rear rims after war. early rear rims were painted black or orange. later ones were galvanized. Bob

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03-19-2008 18:46:55

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 Re: Early and late B in reply to Lanse, 03-19-2008 18:20:17  
look at tractor photos to the left. early had hand brake, late foot brakes. early curved front axle, later adjustable front axle.

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