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Farmall & IHC Tractors Discussion Forum

farmall B BN

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R.J. Arnold

12-23-2011 19:16:50

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What are the differances between a farmall B and a BN? They look the same to me.


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Red Dave

12-24-2011 06:44:33

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 Re: farmall B BN in reply to R.J. Arnold, 12-23-2011 19:16:50  
third party image

The differential shafts and housings on each side of a B are 22" long, on a BN they are 18" each side. The engine, transmission, final drives, steering gear, seat, etc. are all identical.

The BN has a narrower drawbar, foot pan & pedal guard. The BN differential shaft housings are the same length as those on an A, but they are not the same casting.

To tell at a glance whether it is a B or a BN, look at how the seat is mounted. If the right-hand seat bracket is against the fender, using the same bolts, it is a BN. If the seat bracket is mounted 4" from the fender, it is a B.

The picture is of a B, note the 22" differential shaft assembly and the 4" space between the fender and seat mounting bracket.

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12-24-2011 05:59:03

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 Re: farmall B BN in reply to R.J. Arnold, 12-23-2011 19:16:50  
A Farmall BN has the same width axles as the right side of a Faramll A. If you sit on an A and then a B you will notice the B is wider on the right side.

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Zachary Hoyt

12-23-2011 19:21:41

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 Re: farmall B BN in reply to R.J. Arnold, 12-23-2011 19:16:50  
The BN rear axle assembly is 8 inches narrower, 4 inches on each side.

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