The 789D delivers a faster speed on grade than competitive trucks thanks to the efficient 3500 series 16-cylinder engine and mechanical drivetrain. The 23% net torque rise provides unequaled lugging force during acceleration, on steep grades and in rough underfoot conditions.

More than 30 new features improve performance and keep operators safe, comfortable and in control. The 789 offers the lowest cost per ton in its size class and high reliability — reducing overall owning and operating costs.

The Cat® 789D continues the tradition of Caterpillar’s proven 789 Truck with high productivity and lowest in class cost per ton. The 789D features the following: Safety and Sustainability. Safety is top priority. Engine options to meet regulatory requirements or application specifi c needs.

IRVING, Texas, March 4, 2025― Helping prevent haul road overwatering and underwatering, the new Cat ® 789D Autonomous Water Truck (AWT) enhances productivity by enabling mine operations to digitally track water consumption and reduce waste.

The 789D delivers a faster speed on grade than competitive trucks thanks to the efficient 3500 series 16-cylinder engine and mechanical drivetrain. The 23% net torque rise provides unequaled lugging force during acceleration, on steep grades and in rough underfoot conditions.

The Cat® 789D continues the tradition of Caterpillar’s proven 789 Truck with high productivity and lowest in class cost per ton. The 789D features the following: • Safety and Sustainability. Safety is top priority. Engine options to meet regulatory requirements or application specific needs.

View updated Caterpillar 789D Rock Truck specs. Get dimensions, size, weight, detailed specifications and compare to similar Rock Truck models.

Apr 1, 2025 · Caterpillar has revealed the 789D – the industry’s first commercially available autonomous water truck. The truck is built on the 789D mining truck chassis and integrates the truck,...

Oct 17, 2022 · 789D Gradeability/Speed/Rimpull*– 2100 hp To determine gradeability performance: Read from gross weight down to the percent of total resistance. Total resistance equals actual percent grade plus 1% for each 10 kg/t (20 lb/ton) of rolling resistance. From this weight-resistance point, read horizontally to the curve with the highest obtainable

The Cat® 789D continues the tradition of Caterpillar's proven 789 Truck with high productivity and lowest in class cost per ton. The Cat® 3500 series engines are built for power, reliability and efficiency for superior performance in the toughest applications.