4000 was a high horsepower-to-weight tractor, designed as a "runner".
Using the same engine as the 4020, but being almost 1000 lbs lighter,
the 4000 could, in the same amount of time, pull a 4-bottom plow fast
enough to cover the same acreage as a 4020 with a 5-bottom plow. The John
Deere 4000 was also an economy tractor, providing the same power as the
4020 with fewer features and smaller rear axles.
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the John Deere 4000 model tractor.