John Deere 4020 Specs and Oil Capacity Guide
John Deere 4020 specs and oil capacity guide. Looking for John Deere 4020 specs for service or parts? This guide puts the key numbers first: 101.3 engine HP, 95.83 PTO HP, 8,225–9,560 lb weight range, and 34-gallon fuel capacity. But engine oil capacity varies by version—early diesel uses 8 quarts, late diesel uses 12 quarts. Gasoline and LP versions have different capacities too. Hydraulic capacity depends on transmission: Syncro-Range holds 10 gallons, Power Shift holds 12. Production changes from 1963 to 1972 mean serial number, engine type, and transmission all matter before you fill or order. Check the version first—then check the specs. That order prevents mix-ups with fluid capacities and part numbers.












