The Model 40 - The John Deere Model 420 Tractors and Crawlers

The first year, or phase I, 420s used a modified 40 engine.

Repair Service Manual - John Deere 316-318-420- 1 PDF - 426 Pgs

The next tractor got the next number no matter what the type. You could order special options on your 420, like spin out rear rims.

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New John Deere 316 318 420 Tractor Service Manual.

Lhts, carette lhter, and front end wehts were other popular add-ons.

Service Manual Scans - SmokStak

The serial numbering differed from the 40 in that the number began at 80001 and was consecutive. The 420 line included 6 rubber wheel tractors and a crawler.

John deere 420 manual download:

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