Wheel Tractor-Scrapers
657 Wheel Tractor-Scraper
Tractor Engine
Cat C18
Scraper Engine
Cat C15
Flywheel Power - Tractor/Scraper
469kW (629 hp) / 353 kW (473 hp)
637K Wheel Tractor-Scraper
Rated Load
37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Fuel Tank Refill Capacity - Scraper
370 gal (US)
180° Curb-to-Curb Turning Width
40.12 ft
631K Wheel Tractor-Scraper
Tires - Scraper
37.25R35**E3
Rated Load
37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Scraper Capacity - Struck
24 yd³
621K Wheel Tractor-Scraper
Maximum Depth of Cut
12.4 in
Maximum Depth of Spread
21.3 in
180° Curb-to-Curb Turning Width
38.71 ft
651 Wheel Tractor-Scraper
Tractor Engine
Cat C18
Flywheel Power - Tractor/Scraper
469kW (629 hp)
Net Power
469 kW/637 hp
657G Wheel Tractor-Scraper
Flywheel Power - Tractor/Scraper
447 kw (600 hp) / 337 kW (451 hp)
Flywheel Power - Tractor
421 / 447 kW (564 / 600 hp)
Flywheel Power - Scraper
306 / 337 kW (410 / 451 hp)
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