This page provides a detailed comparison of the specifications for the Chamberlain 4080 and the Hart-Parr Old Reliable 30-60.
| Chamberlain 4080 | Hart-Parr Old Reliable 30-60 | |
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| Engine | ||
| Engine Manufacturer | John Deere | Hart-Parr |
| Engine Model | 6-329 | - |
| Engine Cooling Type | liquid-cooled | Liquid-cooled |
| Engine Fuel Type | diesel | Kerosene |
| Engine Induction Type | Compression | Natural |
| Engine Cylinders | 6 | 2 |
| Engine Displacement Value | 329 ci (5.4 L) | 2356 ci (38.6 L) |
| Engine Rated Rpm | 2200 | 300 |
| Transmission | ||
| Transmission Type | two-speed power shift | Gear |
| Transmission Forward Gears | 12 | 1 |
| Transmission Reverse Gears | 4 | 1 |
| Dimensions | ||
| Length Value | 167.4 | 200 |
| Width Value | 87.4 | 106 |
| Operating Weight Value | 10340 lb (4690 kg) | 20100 lb (9117 kg) |
| Miscellaneous | ||
| Chassis | - | 4x2 |
| Drive Type | - | 2WD |
| Hitch Category | II | - |
| Hitch Position | Rear | - |
| Operator Station Type | open center | - |
| Starter Type | electric | - |
