John Deeretractor(no series)
John Deere 8120 - TRACTOR
Specifications · OEM parts breakdown
Post a parts request and compare supplier quotes.
John Deere 8120 - TRACTOR specifications
Engine
| Cylinders | 6 |
| Displacement | 496.0 cu in. (8128 cc) |
| Bore | 4.57 in. (11.61 cm) |
| Stroke | 5.08 in. (12.90 cm) |
| Rated RPM | 2200 RPM |
| Compression Ratio | 16.5:1 |
Performance
| Gears | 16 forward and 4 reverse |
| Rear PTO Speed | 1000 or 540/1000 |
Service capacities (summary)
| Coolant Capacity | 9.0 gal (34.0 l) |
| Transmission Oil Capacity | 37.0 gal (140.1 l) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
8120 - TRACTOR common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| AR103220 | Strainer | Fuel system service | Check fitment → |
| R502778 | Fuel Filter | Fuel system service | Check fitment → |
| AH165504 | Fuel Filter | Fuel system service | Check fitment → |
| R101042 | O-Ring | Fuel system service | Check fitment → |
| RE506970 | Fuel Line, Fuel Line | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
Need a specific 8120 - TRACTOR part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.
Post a parts request and compare supplier quotes.