This page provides a detailed comparison of the specifications for the Hart-Parr Old Reliable 30-60 and the John Deere 6105E.
| Hart-Parr Old Reliable 30-60 | John Deere 6105E | |
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| Engine | ||
| Engine Manufacturer | Hart-Parr | John Deere |
| Engine Model | - | PowerTech PWL |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Kerosene | Diesel |
| Engine Induction Type | Natural | Wastegate turbocharger with air-to-air aftercooling |
| Engine Cylinders | 2 | 4 |
| Engine Displacement Value | 2356 ci (38.6 L) | 276 ci (4.5 L) |
| Engine Rated Rpm | 300 | 2200 |
| Engine Power Output Value | - | 84 hp (62.6 kW) |
| Transmission | ||
| Transmission Type | Gear | Partial power shift with wet disc clutch |
| Transmission Forward Gears | 1 | 12 |
| Transmission Reverse Gears | 1 | 12 |
| Dimensions | ||
| Length Value | 200 | - |
| Width Value | 106 | - |
| Operating Weight Value | 20100 lb (9117 kg) | 14253 lb (6465 kg) |
| Miscellaneous | ||
| Chassis | 4x2 | 4x4 MFWD 4WD |
| Drive Type | 2WD | 4WD |
| Hitch Type | - | Category II |
| Hitch Category | - | II |
| Hitch Position | - | Rear |
| Hitch Capacity Value | - | 5722 lb (2595 kg) |
| Hydraulic System Type | - | Open center |
| Operator Station Type | - | Two-post foldable ROPS or Cab (optional) |
| Starter Type | - | Electric |
