The D11 dozer features new load-sensing hydraulics, high-horsepower reverse, and the latest Cat technology—it is also engineered to be rebuilt multiple times, with a redesigned main frame.
The load-sensing hydraulics and new drivetrain components deliver up to 8 percent fuel efficiency gains, according to the company. The variable hydraulic pumps adjust output to meet demand, which is meant to save energy, reduce heat generation, and extend component life. The stator clutch torque divider provides improved drivetrain efficiency. When combined with the new, high-horsepower reverse function, the machine delivers 4 to 8 percent greater productivity while burning less fuel, Cat says.
Redesigned structures and components include a larger equalizer bar, which features an improved bearing design to increase reliability. There are also replaceable bearings on the ripper and blade pin boreholes, and new push arm trunnion bearing inserts.
The Cat C32 engine delivers power ratings of 850 horsepower forward and 955 horsepower in reverse. A single-plane cooling system is designed to better dissipate heat, and it provides easier core clean out. Improved reversing fan function delivers greater reverse airflow for radiator clean out.
Standard features built into the D11 offer improved access to the operator compartment. The cab door can now be mounted for either left- or right-side opening. Delayed egress lighting allows the operator to exit an illuminated dozer, while access lighting is controlled from either the cab or ground-level electrical center.
The new operator station features high-definition touchscreen displays with scalable electronic architecture. The dynamic fluid monitoring system displays fluid levels and warns the operator of low-fluid conditions. New cab anchor points for tie-off advance safety during service and maintenance.
Caterpillar offers a range of standard and optional technologies for the dozer: Standard Automated Blade Assist makes use of preset blade pitch position to increase efficiency while reducing operator workload; Enhanced Auto Shift automatically selects the optimal gear and engine speed based on powertrain load and desired ground speed.
Also, available AutoCarry automatically changes blade position to keep track slip at a minimum to optimize productivity when pushing a load. An optional Auto Ripper Control monitors and automatically adjusts engine speed and ripper depth to minimize track slip.
Cat D11 Specifications
European Stage IV/ Stage II equivalent
U.S. EPA Tier 4 Final/Tier 2 equivalent
Net Power forward @ 1,800 rpm (ISO 9249/SAE J1349)
634 kW (850 hp)
Net Power reverse @ 1,800 rpm (ISO 9249/SAE J1349)
712 kW (955 hp)
Operating Weight – standard
104 236 kg (229,800 lb)
Blade Capacity –Semi Universal
27.2 m3 (35.6 yd3)