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  • March 2014 Industrial Power - Caterpillar D11T Dozer

March 2014 Industrial Power - Caterpillar D11T Dozer

Bigger is always better

Mar 10, 2014
Photographers: Jason Gonderman
Ever since childhood, young boys around the world have had a fascination with bulldozers. It starts in the backyard with a Tonka truck and progresses to adulthood. We all stop and stare when we see one in its natural habitat, doing that work that makes it great. And, if given the chance, one would be hard pressed to find a man alive who wouldn’t hop in the driver seat and take one for a spin.
Arguably, the most recognizable bulldozers in America are the Caterpillar D-series, the king of which is the mammoth D11T. Classified as a track-type tractor, the D11T sports an 850hp 32.1L V-12 C32 Acert engine and has a top speed of 8.7 mph in reverse (7.3 mph forward). Speed isn’t much of a factor, however, when you consider that the D11T weighs in at nearly 230,000 pounds and is capable of moving 45 yards of earth, in standard trim. If you have the Carrydozer (CD) version, those numbers are upped to just shy of 250,000 pounds, and it can push nearly 58 yards with its larger blade.
The D11T’s C32 Acert engine meets U.S. EPA Tier 4 Final emissions standards for off-highway equipment, and it does this by use of a cooled exhaust gas recirculation system (EGR) and a diesel oxidation catalyst (DOC). Fuel is provided by the latest-generation Cat MEUI-C high-pressure common-rail injection system, while airflow is handled by a single fixed-geometry turbocharger fitted with air-to-air aftercooling. An ADEM A4 electronic engine control module manages fuel delivery and airflow in an effort to get the best performance per gallon of fuel used.
Photo 2/5   |   Caterpillar D111t Dozer
A torque divider is used between the engine and transmission to act as the hydrodynamic component, reducing the possibility of damage to the powertrain by damping impact loads and vibrations. The Cat Planetary Powershift transmission offers three speeds of forward and reverse gears and utilizes large-diameter, high- capacity, oil-cooled clutches and water-to-oil fluid cooling.
Preparing for the future, the D11T’s electronic systems have been completely integrated to function as one. This integration creates a smart machine and more informed operator, maximizing the productivity of both. Some of the technological wizardry employed includes Automated Blade Assist (ABA), Enhanced Auto Shift (EAS), Advisor Monitoring System (AMS), Autocarry, Automatic Ripper Control, Cat Product Link, and the Cat MineStar System. Add in operator luxuries such as a heated and ventilated seat, air conditioning, LED lighting, dual pane windows, and a visibility package that includes a multitude of cameras, and you’ve got one of the finest bulldozers available.
Specifications
Engine: CAT C32 ACERT
Displacement: 32.1L
Cylinders: V-12
Bore: 5.7 inches
Stroke: 6.4 inches
Net Power: 850 hp (SAE J1349)*
Net Torque: 3,899 lb-ft at 1,200 rpm
Engine Speed (max): 1,800 rpm
Operating Weight: 229,848 pounds
Shipping Weight: 82,640 pounds
Top Speed: 7.3 mph (forward); 8.7 mph (reverse)
Transmission: Planetary powershift
Clutch Diameter: 21 inches
Number of Gears: Three forward; three reverse
Capacities
Fuel Tank: 425 gallons
Cooling System: 71.1 gallons
Powertrain: 90.9 gallons
Crankcase: 27.2 gallons
Final Drives: 12.4 gallons (each)
Roller Frames: 24.8 gallons (each)
Dimensions
Overall Length (basic tractor): 242.5 inches
Overall Length (including blade and ripper): 414.4 inches
Width Over Trunnions: 172.4 inches
Height: 185.0 inches (to top of ROPS)
Track Gauge: 114.0 inches
Length of Track on Ground: 175.0 inches
Ground Clearance: 26.6 inches * Net power is the power available at the flywheel when the engine is equipped with fan at max speed, air cleaner, muffler, alternator, and emissions controls as required.
* No engine derating is required up to 12,000 feet altitude.

Sources

Caterpillar
Peoria, IL 61629
309-675-1000
www.cat.com

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