621 Partial Wheel Tractor-Scraper
- Tractor Engine
- Cat® C13
- Flywheel Power - Tractor
- 407 hp
- Top Speed - Loaded
- 33.5 mile/h
621 Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
- Scraper Capacity - Heaped
- 24 yd³
- Top Speed - Loaded
- 33.5 mile/h
621 Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
- Scraper Capacity - Heaped
- 24 yd³
- Top Speed - Loaded
- 33.5 mile/h
621K Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
- Scraper Capacity - Heaped
- 24 yd³
- Top Speed - Loaded
- 33.5 mile/h
627H Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)/216 kW (290 hp)
- Scraper Capacity - Heaped
- 24 yd³
- Top Speed - Loaded
- 33.5 mile/h
631 Partial Wheel Tractor-Scraper
- Tractor Engine
- Cat® C18
- Flywheel Power - Tractor
- 570 hp
- Top Speed - Loaded
- 34.7 mile/h
631G Wheel Tractor Scraper
- Flywheel Power - Tractor/Scraper
- 373 kW (500 hp)
- Scraper Capacity - Heaped
- 34 yd³
- Top Speed - Loaded
- 33 mile/h
631K Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 570 hp
- Scraper Capacity - Heaped
- 34 yd³
- Top Speed - Loaded
- 34.7 mile/h
637G Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 373 kw (500 hp) / 211 kW (283 hp)
- Scraper Capacity - Heaped
- 50 yd³
- Top Speed - Loaded
- 33 mile/h
637K Wheel Tractor – Coal Bowl Scraper
- Flywheel Power - Tractor/Scraper
- 425 kW (570 hp)/216 kW (290 hp)
- Scraper Capacity - Heaped
- 50 yd³
- Top Speed - Loaded
- 34.7 mile/h
637K Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 570 hp
- Scraper Capacity - Heaped
- 34 yd³
- Top Speed - Loaded
- 34.7 mile/h
651 Partial Wheel Tractor-Scraper
- Tractor Engine
- Cat® C18
- Gross Power (SAE J1995)
- 637 hp
- Top Speed - Loaded
- 34.9 mile/h
651 Wheel Tractor-Scraper
- Tractor Engine
- Cat C18
- Flywheel Power - Tractor/Scraper
- 469kW (629 hp)
- Scraper Capacity - Heaped
- 44 yd³
657 Wheel Tractor-Scraper
- Tractor Engine
- Cat C18
- Flywheel Power - Tractor/Scraper
- 469kW (629 hp) / 353 kW (473 hp)
- Scraper Engine
- Cat C15
657 Wheel Tractor-Scraper
- Tractor Engine
- Cat C18
- Flywheel Power - Tractor/Scraper
- 469kW (629 hp) / 353 kW (473 hp)
- Scraper Engine
- Cat C15
657G Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 447 kw (600 hp) / 337 kW (451 hp)
- Scraper Capacity - Heaped
- 73 yd³
- Top Speed - Loaded
- 33 mile/h
657G Wheel Tractor-Scraper
- Flywheel Power - Tractor/Scraper
- 447 kW (600 hp) / 337 kW (451 hp)
- Scraper Capacity - Heaped
- 44 yd³
- Top Speed - Loaded
- 33 mile/h