This page provides a detailed comparison of the specifications for the Hart-Parr Old Reliable 30-60 and the John Deere 670.
| Hart-Parr Old Reliable 30-60 | John Deere 670 | |
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| Engine | ||
| Engine Manufacturer | Hart-Parr | Yanmar |
| Engine Model | - | 3TNA72 |
| Engine Cooling Type | Liquid-cooled | Liquid-Cooled |
| Engine Fuel Type | Kerosene | Diesel |
| Engine Induction Type | Natural | Natural Aspiration |
| Engine Cylinders | 2 | 3 |
| Engine Displacement Value | 2356 ci (38.6 L) | 54 ci (0.9 L) |
| Engine Rated Rpm | 300 | 2850 |
| Engine Power Output Value | - | 18 hp (13.8 kW) |
| Transmission | ||
| Transmission Type | Gear | Unsynchronized Gear |
| Transmission Forward Gears | 1 | 8 |
| Transmission Reverse Gears | 1 | 2 |
| Dimensions | ||
| Length Value | 200 | 108.7 |
| Width Value | 106 | 42.5 |
| Operating Weight Value | 20100 lb (9117 kg) | 1728 lb (784 kg) |
| Miscellaneous | ||
| Chassis | 4x2 | 4x2 2WD |
| Drive Type | 2WD | - |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | - | Category 1 |
| Hitch Category | - | I |
| Hitch Capacity Value | - | 794 lb (360 kg) |
| Hydraulic System Type | - | Open Center |
| Operator Station Type | - | Two-post ROPS |
| Starter Type | - | Electric |
