Caterpillar introduces the CS44 and CP44 vibratory soil compactors, which compete in the 5.7- to 7.9-metric ton machine class and feature the Caterpillar dual-pump propel system that provides improved gradeability. The dual-pump propel system provides separate hydraulic flow to the rear wheels and the drum for tractive effort in soft underfoot conditions or steep slope applications, and is designed for control on a grade in forward and reverse. Both models feature the new Cat C4.4 engines with ACERT technology.