This page provides a detailed comparison of the specifications for the Caterpillar D7G SA Special Application and the John Deere 8120T.
| Caterpillar D7G SA Special Application | John Deere 8120T | |
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| Engine | ||
| Engine Manufacturer | Caterpillar | John Deere |
| Engine Model | 3306 | - |
| Engine Cooling Type | Liquid-Cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Turbocharged Aftercooled | Turbocharged |
| Engine Cylinders | 6 | 6 |
| Engine Displacement Value | 638 ci (10.5 L) | 496 ci (8.1 L) |
| Engine Rated Rpm | 2000 | 2200 |
| Engine Power Output Value | 250 hp (186.4 kW) | 200 hp (149.1 kW) |
| Transmission | ||
| Transmission Type | Gear | Full power shift |
| Transmission Forward Gears | 6 | 16 |
| Transmission Reverse Gears | 4 | 4 |
| Dimensions | ||
| Length Value | 179 | 207 |
| Width Value | 103 | 103.7 |
| Operating Weight Value | 40700 lb (18461 kg) | 25950 lb (11771 kg) |
| Miscellaneous | ||
| Chassis | Crawler | Track |
| Drive Type | - | Track |
| Hitch Type | - | Three-Point Hitch |
| Hitch Category | - | III/IIIN |
| Hydraulic System Type | Open Center | Closed center pressure flow compensated (PFC) |
| Operator Station Type | - | Cab |
| Starter Type | Electric | Electric |
