This page provides a detailed comparison of the specifications for the Caterpillar 420D and the Hart-Parr Old Reliable 30-60.
| Caterpillar 420D | Hart-Parr Old Reliable 30-60 | |
|---|---|---|
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| Engine | ||
| Engine Manufacturer | Caterpillar | Hart-Parr |
| Engine Model | Cat 3054 | - |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Kerosene |
| Engine Induction Type | Naturally aspirated | Natural |
| Engine Cylinders | 4 | 2 |
| Engine Displacement Value | 268 ci (4.4 L) | 2356 ci (38.6 L) |
| Engine Rated Rpm | 2200 | 300 |
| Engine Power Output Value | 88 hp (66.0 kW) | - |
| Transmission | ||
| Transmission Type | Power Shuttle | Gear |
| Transmission Forward Gears | 4 | 1 |
| Transmission Reverse Gears | 4 | 1 |
| Dimensions | ||
| Length Value | 274.4 | 200 |
| Width Value | 92.5 | 106 |
| Operating Weight Value | 15763 lb (7150 kg) | 20100 lb (9117 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x2 |
| Drive Type | 2WD | 2WD |
| Hydraulic System Type | Closed center | - |
| Operator Station Type | Four-post ROPS/FOPS | - |
| Starter Type | Electric | - |
