This page provides a detailed comparison of the specifications for the Hart-Parr Old Reliable 30-60 and the John Deere 8335R.
| Hart-Parr Old Reliable 30-60 | John Deere 8335R | |
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| Engine | ||
| Engine Manufacturer | Hart-Parr | - |
| Engine Model | - | John Deere PowerTech PSX |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Kerosene | Diesel |
| Engine Induction Type | Natural | Dual turbocharged |
| Engine Cylinders | 2 | 6 |
| Engine Displacement Value | 2356 ci (38.6 L) | 548 ci (9.0 L) |
| Engine Rated Rpm | 300 | 1800 |
| Engine Power Output Value | - | 340 hp (253.3 kW) |
| Transmission | ||
| Transmission Type | Gear | Full power shift |
| Transmission Forward Gears | 1 | 16 |
| Transmission Reverse Gears | 1 | 4 |
| Dimensions | ||
| Length Value | 200 | 243.9 |
| Width Value | 106 | 95.7 |
| Operating Weight Value | 20100 lb (9117 kg) | 27375 lb (12417 kg) |
| Miscellaneous | ||
| Chassis | 4x2 | 4x4 MFWD 4WD |
| Drive Type | 2WD | 4WD |
| Hitch Type | - | 3-Point Hitch |
| Hitch Category | - | IVN/III |
| Hitch Position | - | Rear |
| Hitch Capacity Value | - | 18200 lb (8255 kg) |
| Hydraulic System Type | - | Closed center pressure-flow compensated |
| Operator Station Type | - | CommandView II cab |
| Starter Type | - | Electric |
