Caterpillar 627K vs Caterpillar 637K

	Caterpillar Caterpillar 627K	Caterpillar Caterpillar 637K
Operating weight	—	—
Engine power	—	—
Heaped capacity	≈18 m³ (24 yd³)	≈26 m³ (34 yd³)
Configuration	Twin engine, push-pull capable	Twin engine, push-pull capable
Engines	Cat C13 (tractor) and C9.3 (scraper)	—
Strengths	+ Excellent traction on grades + Push-pull loading without a dozer + Higher productivity in tough conditions	+ Excellent traction + Push-pull loading
Watch-outs	− Higher purchase and running cost than single-engine models	− High running cost
	Full 627K review	Full 637K review

Specifications are typical figures for standard configurations and may be measured differently by each manufacturer (for example net vs gross power). Always confirm with the manufacturer or dealer. Build another comparison.