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.
- Top Speed (Loaded) 34.7 mph
- Flywheel Power - Tractor/Scraper 425 kW (570 hp)/216 kW (290 hp)
- Scraper Capacity - Heaped 50 yd³
- Fuel Tank Refill Capacity - Scraper 370 gal (US)