Plaza notes
Hard ruleDescription
20 (SN 20GR4814 & up)
Quality Aftermarket Intake / Exhaust Valve
19" diameter pan (some tractors were originally equipped with a 21" pan)
D179 diesel engines: 385
Industrial Models: OC-3
Mr. Thinker's John Deere Almanac, 4th Edition For John Deere Tractor John Deere 20 (SN 20GR4814 & up)Quality Aftermarket Mr. Thinker's John Deere Almanac, 4th Edition For John Deere Tractors Specifications 8 1 2" x 5 12" Soft cover Black and white 122 pages For all models built from 1918 to 1972; a bit of history, plus serial number and year breaks along with accurate production numbers (except for 820 3 cyl., 1020, 1520 and 2020), notes on some significant changes, charts on tractor fluid capacities, cubic inches, compression ratios, torque specs,
Exchange/Return Notes
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