The new Cat 621H, 623H and 627H wheel tractor-scrapers feature a more powerful engine in the tractor, and a more powerful engine in the scraper of the 627H.
The new Cat 621H, 623H and 627H wheel tractor-scrapers feature a more powerful engine in the tractor, and a more powerful engine in the scraper of the 627H. The Cat C13 engine in the tractor produces 407 horsepower (18 percent more compared with G- Series models), and the C9.3 in the 627H scraper produces 290 horsepower (up 19 percent). In addition, a new torque converter is designed to deliver more power to the ground. Capacities are increased 2 cubic yards—to 24 cubic yards—for the single-engine/open-bowl 621H and twin-engine/open-bowl 627H. The elevating 623H is rated at 23 cubic yards and features a redesigned elevator that delivers more power and is easier to adjust. New software integrates the performance of the engine and eight-speed planetary transmission, and the new models also feature higher-capacity wet disc service brakes and new cabs that are 21 percent larger than G-Series models.
The new Cat 620 K Series Wheel Tractor-Scrapers—621K, 623K, and 627K—refine the design of their H Series predecessors, which introduced features such as Sequence Assist and Load Assist that automate cycles.
Cat completely redesigned the tractor for its 613G scraper with a C6.6 engine delivering 3 percent more horsepower and a new torque converter increasing rim pull. With faster elevator and travel speeds, the 613G can load material as much as 13 percent faster than its predecessor.
The D7E crawler dozer, with its diesel-electric power train, has been upgraded with three dozing features
The Cat D6T crawler dozer has been updated for Tier 4 Final with a Cat C9.3 ACERT engine rated at 207 horsepower.