The Caterpillar D9 dozer replaces the D9T dozer with productivity gains of up to 3 percent in cost per unit of material moved. The Tier 4-F Cat C18 engine delivers 440 net horsepower at 1,750 rpm.
The 130-horsepower Caterpillar D4 dozer replaces the Cat D6K2 and has an operating weight of 29,259 pounds. The low ground pressure version (LGP) has an operating weight of 30,882 pounds. The Cat D4 ...