Cat says its upgraded D9T bulldozer offers enhanced operator safety, comfort and convenience, refined performance and increased productivity. The 110,000-lb (49 900-kg) operating-weight dozer is powered by a Cat C18 ACERT engine rated at 410 net hp (306 kW). For improved comfort and efficiency, a low-effort electronic dozer control handle gives the operator control of all dozer functions with one hand. For added safety, a Dynamic Inclination Monitor provides readouts of the tractor’s pitch angle and side-to-side slope, and an operator-presence system locks out the power train and hydraulic system to avoid machine movement when the operator is entering or leaving the cab, assisted by redesigned steps, handles and guardrails. An available visibility package includes mirrors on the lift cylinders and a ROPS-mounted camera system with a 7-in. (18-cm) color monitor near the rear view mirror. New for the D9T is the Enhanced Auto Shift (EAS) system, which provides operator-selectable forward and reverse speeds similar to an automatic transmission.

Other refinements include a new radiator design that is durable and corrosion-resistant. A new air-to-oil hydraulic cooler results in lower hydraulic-oil temperatures for extended component life, and the hydraulically driven, variable-speed demand fan provides optimal cooling while using less power. A new “OK-to-Start” system electronically checks powertrain, engine coolant and engine oil systems. The VIMS 3G (Vital Information Management System), which can use both cellular and satellite networks, monitors the machine’s health and working status in real time and provides machine history for off-board analysis.