637K coal bowls are longer and higher than standard wheel tractor scraper bowls, allowing them to haul 38 m (50 yd) of low density loose coal. The bowls are designed and built to specifically deliver in coming loose coal to the stock pile and reserve stock piled coal to the feeder system.
Specs
| Scraper Capacity: Heaped | 50 yd³ |
| Top Speed (Loaded) | 34.7 mph (55.8 km/h) |
| Flywheel Power - Tractor/Scraper | 425 kW (570 hp)/216 kW (290 hp) |
