This page provides a detailed comparison of the specifications for the Allis Chalmers HD19 and the Caterpillar D7G SA Special Application.
| Allis Chalmers HD19 | Caterpillar D7G SA Special Application | |
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| Engine | ||
| Engine Manufacturer | General Motors | Caterpillar |
| Engine Model | - | 3306 |
| Engine Cooling Type | Liquid-Cooled | Liquid-Cooled |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Blower | Turbocharged Aftercooled |
| Engine Cylinders | 6 | 6 |
| Engine Displacement Value | 426 ci (7.0 L) | 638 ci (10.5 L) |
| Engine Rated Rpm | 1750 | 2000 |
| Engine Power Output Value | - | 250 hp (186.4 kW) |
| Transmission | ||
| Transmission Type | Torque Converter | Gear |
| Transmission Forward Gears | 2 | 6 |
| Transmission Reverse Gears | 1 | 4 |
| Dimensions | ||
| Length Value | 191 | 179 |
| Width Value | 109 | 103 |
| Operating Weight Value | 40395 lb (18323 kg) | 40700 lb (18461 kg) |
| Miscellaneous | ||
| Chassis | Track | Crawler |
| Drive Type | Track Drive | - |
| Hydraulic System Type | - | Open Center |
| Starter Type | Electric Starter | Electric |
