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Had a standoff in the field yesterday...

J

JD Tim

Member
1946 JD GM and the 1954 Super MTA(sticker ed wrong).
a78312.jpg
 
What is a GM? (maybe it is a typo?) Equal weight I might have to give it to the G. There is a lot more tire on it. As they sit advantage Alta.
 
In Nebraska test results, the Farmall SM is a clear winner over the John Deere G. G gasoline Nebraska test #383, 39.80 corrected belt hp, 36.01 corrected max drawbar hp, 3494 max lbs pull @ 2.07 mph. SM gasoline Nebraska test# 476, 48.56 corrected max belt hp, 44.24 corrected max drawbar hp, 5676 max lbs pull @ 2.43 mph.

Harold H
 
The GM stood for G modified, John Deere had to call it that because of ww2 restrictions. Anyway that GM would have been built the same time as the ww2 M . John Deere built the 70 when that super MTA was built. Just so ya know!
 
Harold H is correct with the horsepower ratings from nebraska, but in the last 65 years since then, many of the G's have been overhauled with aluminum pistons.My 47 G, and many that I have had on the dynomometer make 54HP with the piston change.The change raises the compression from 4.21:1 up to 5.6:1.The low compression was to burn low cost fuel.
 
Thanks Cushman. I'm not sure why it happens, but a G can walk on an average M most of the time. You might like Farmalls and want to brag them up, but there are no gimmies at tractor pulls.
 
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