This page provides a detailed comparison of the specifications for the Hart-Parr Old Reliable 30-60 and the Oliver 1955.
| Hart-Parr Old Reliable 30-60 | Oliver 1955 | |
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| Engine | ||
| Engine Manufacturer | Hart-Parr | Oliver-Waukesha |
| Engine Model | - | Oliver-Waukesha |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Kerosene | Diesel |
| Engine Induction Type | Natural | Turbocharged |
| Engine Cylinders | 2 | 6 |
| Engine Displacement Value | 2356 ci (38.6 L) | 310 ci (5.1 L) |
| Engine Rated Rpm | 300 | 2400 |
| Engine Power Output Value | - | 108 hp (80.5 kW) |
| Transmission | ||
| Transmission Type | Gear | Gear |
| Transmission Forward Gears | 1 | 6 |
| Transmission Reverse Gears | 1 | 2 |
| Dimensions | ||
| Length Value | 200 | 159.4 |
| Width Value | 106 | 80.3 |
| Operating Weight Value | 20100 lb (9117 kg) | 11250 lb (5103 kg) |
| Miscellaneous | ||
| Chassis | 4x2 | 4x2 2WD |
| Drive Type | 2WD | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Category | - | III/II |
| Hitch Capacity Value | - | 6000 lb (2722 kg) |
| Hydraulic System Type | - | Closed center |
| Operator Station Type | - | Open operator station |
| Starter Type | - | Electric |
