According to Caterpillar, the new Cat D1, D2, and D3 Next Generation dozers feature styling changes, technology enhancements, and a new low-emissions, fuel-efficient engine. The new Caterpillar bulldozers replace the D3K2, D4K2 and D5K2 models, respectively, and the new series offers
the same specialty-model options as their predecessors. The new small dozers, says Caterpillar, are designed to optimize speed, transportability, maneuverability, versatility, and finish-grade accuracy.
The Caterpillar dozers use a 10-inch primary display with color touch screen, providing access to standard and optional technology features, including a system that reduces track slip when the machine encounters maximum load, and a standard automatic traction-control system that no longer requires operator interaction. The Slope Indicate system provides slope of the chassis in the cross-slope direction, and the Stable Blade feature complements operator blade control input.
Slope Assist, available with the Cat attachment ready option (ARO), allows “scalability” to GRADE with 3D control systems, says Caterpillar, allowing operators to more easily achieve required blade main-fall slope (fore/aft) and cross slope (left/right) by automatically maintaining the established blade grade angles. The Power Pitch option enables control of blade pitch (fore/aft) from the cab.
Two undercarriage configurations—standard and low ground pressure—are available The XL designation will no longer be used with the new models, says Caterpillar, and the LGP 30-inch track will be offered for the D1 and D3 small dozers. Undercarriages are available with sealed and lubricated tracks or with the Cat Abrasion undercarriage system.
The bulldozers use the Cat C3.6 engine, which meets EU Stage V and U.S. EPA Tier 4- Final emission standards. For markets with less strict emissions standards, a Tier 3 equivalent engine is available with the same net power ratings as the Stage V/Tier 4-Final engines. While offering the
same net power ratings as their predecessors, says Caterpillar, the new Next Generation Caterpillar dozers deliver up to 10 percent improved fuel economy.
The Eco Mode, available in forward/reverse or reverse-only options, is designed to improve fuel economy by automatically reducing engine speed when high speed is not required. An available turbine-type pre-cleaner is available for machines used in debris-laden environments, and an automatic reversing fan assists in reducing debris build-up in the coolers and engine enclosure. Nominal operating weights for the new dozers are 18,390, 19,019, and 21,150 pounds, respectively.Net power ratings are 80, 92, and 104 horsepower, respectively.