This page provides a detailed comparison of the specifications for the Hart-Parr Old Reliable 30-60 and the John Deere 8320RT.
| Hart-Parr Old Reliable 30-60 | John Deere 8320RT | |
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| Engine | ||
| Engine Manufacturer | Hart-Parr | John Deere |
| Engine Model | - | PowerTech PSS |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Kerosene | Diesel |
| Engine Induction Type | Natural | Turbocharged aftercooled |
| Engine Cylinders | 2 | 6 |
| Engine Displacement Value | 2356 ci (38.6 L) | 548 ci (9.0 L) |
| Engine Rated Rpm | 300 | 2100 |
| Engine Power Output Value | - | 261 hp (194.9 kW) |
| Transmission | ||
| Transmission Type | Gear | Selective gear fixed ratio with full range operator controlled power shift (16 speed) |
| Transmission Forward Gears | 1 | 16 |
| Transmission Reverse Gears | 1 | 16 |
| Dimensions | ||
| Length Value | 200 | 223.5 |
| Width Value | 106 | 150 |
| Operating Weight Value | 20100 lb (9117 kg) | 35465 lb (16087 kg) |
| Miscellaneous | ||
| Chassis | 4x2 | 4x4 MFWD 4WD |
| Drive Type | 2WD | 4WD |
| Hitch Type | - | IVN/III |
| Hitch Category | - | Category 3 |
| Hitch Position | - | Rear |
| Hitch Capacity Value | - | 22144 lb (10044 kg) |
| Hydraulic System Type | - | Direct engine drive |
| Operator Station Type | - | Cab |
| Starter Type | - | 12 volt electric |
