BNH or BN

BNH had a 6.50 X 16 front tire and 7.50 X 40 rear tires. They had a wider range of rear wheel tread adjustment, up to 104 inches, provided by using special offset rear wheels and longer axles. I don't know if this was true on all BNH's or not, but on the long rear axle versions, the axle was increased in diameter by 1/4" and had twelve splines. I don't know how you could check this unless you can find another B of the same age to compare it to. My '41 B has a 12 spline axle, so they must have made that a change for all B's somewhere along the line.

There were 16,047 long frame unstyled B's made - only 65 of them were BNH's and 194 were BN's

Note that the above information is about the unstyled B tractors.

Now let's look at the early styled Model B's. According to another article, steel wheels were regular equipment on B, BN and BW tractors, while the BNH, BWH and BWH-40 tractors came only on rubber. BN's could have either 7.50-16 or 9.00-16 front tires (the article said 7.50-10 or 9.00-10, but I think that must have been a typo - apparently rubber was an option on the BN). The rear tires were either 7.40-40 or 9.00-40. The 40 inch rear wheel seems to be the most reliable way to tell which is a BNH.

Of the total early styled B's (136,000+) only 446 were BNH and 3,584 were BN models.

Based on the production numbers, I'd guess you have a BN - if not, you're one lucky guy to have found a BNH.

Stan

You learn something every day!! I looked in my parts catalog for B models, and sure enough, it shows 10" wheels, just like you said.

I haven't ever seen a BN (or a BNH, for that matter), but don't they look like they're running downhill? I guess they get better mileage that way, eh?

Thanks for the correction,

Stan