When it comes to massive mining trucks, the CAT 785D stands as a true titan of performance and durability. Built by Caterpillar to dominate heavy industrial operations, this truck delivers raw power, unmatched payload capacity, and cutting-edge reliability. Even after years of service, the 785D continues to set global standards for mining efficiency and safety.
Here’s a deep look at why the CAT 785D remains one of the most respected machines in the mining world.
Engine and Powertrain
At the heart of the CAT 785D is a Cat® 3512C HD engine, built to handle extreme conditions.
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Engine Type: V12, 4-stroke diesel with turbocharging and aftercooling.
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Displacement: 58 liters.
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Power Output: 1,450 hp (1,081 kW).
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Torque: 6,500 Nm.
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Transmission: Cat 7-speed planetary power shift transmission.
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Drive Configuration: Rear-wheel drive with advanced traction management.
This setup ensures optimal power delivery, allowing the 785D to carry massive loads even on steep grades without loss of performance or stability.
Payload Capacity and Dimensions
The CAT 785D is engineered to carry colossal payloads efficiently.
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Rated Payload: 142 metric tons (313,000 lbs).
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Empty Weight: 107 tons.
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Gross Machine Operating Weight: 249 tons.
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Top Speed: 56 km/h (35 mph) fully loaded.
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Turning Radius: 15 meters, excellent for its size class.
Its combination of payload and durability ensures minimal downtime, maximizing productivity in every shift.
Design and Build Quality
True to Caterpillar’s DNA, the 785D’s design is focused on long-term performance and low maintenance.
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Frame: Box-section construction with steel castings and deep-penetration welds.
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Suspension: Four independent oil-nitrogen suspension cylinders for better ride control.
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Brakes: Hydraulic oil-cooled multiple-disc brakes on all four corners.
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Tires: 33.00 R51 radial tires built for endurance.
Every element is industrial-grade, designed to handle thousands of operational hours in extreme temperatures and terrains.
Operator Cabin and Comfort
While built for hard labor, the CAT 785D doesn’t neglect operator comfort — a key factor in long shifts.
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Cab Design: Pressurized and sound-suppressed cabin for reduced fatigue.
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Seat: Air-suspension adjustable seat with ergonomic layout.
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Visibility: Panoramic windshield with heated wipers and high-mounted mirrors.
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Controls: Joystick steering, digital display cluster, and automatic retarder control.
These improvements ensure operators stay alert and comfortable, improving overall efficiency and safety on site.
Technology and Safety
The CAT 785D integrates a range of smart technologies that make operations safer and more data-driven:
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Cat MineStar™ System: Real-time fleet tracking and health monitoring.
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Traction Control System: Prevents wheel slippage on uneven terrain.
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Engine Protection System: Monitors oil pressure, coolant temp, and filters automatically.
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Brake Wear Indicators: Digitally monitor brake conditions to reduce maintenance downtime.
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Rollover Protection System (ROPS): Factory-integrated for enhanced safety compliance.
Together, these features make the 785D one of the most technologically advanced trucks in the mining industry.
Fuel Efficiency and Maintenance
Caterpillar optimized the 785D’s performance without compromising fuel efficiency.
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Fuel Tank Capacity: 1,135 liters.
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Average Fuel Burn: ~80 liters/hour (depending on load and conditions).
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Service Intervals: Extended through advanced filtration and oil-life monitoring.
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Maintenance Access: Ground-level service points for safety and speed.
This combination reduces total operating costs and keeps fleets running longer between service stops.
Pricing and Market Position
The CAT 785D sits at the high end of Caterpillar’s mining lineup, priced according to its scale and durability.
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Base Price (New Unit): Around $1.9–2.2 million USD.
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Used Market Value: Between $800,000 and $1.2 million USD, depending on hours and condition.
Despite the high cost, its lifetime ROI is exceptional, thanks to unmatched uptime and reliability.
Why the CAT 785D Still Rules
Even with newer models like the CAT 785 Next Gen, the 785D remains a preferred choice for mining operators because it combines simplicity, strength, and long-term dependability. Its components are widely available, and mechanics around the world know how to service it — making it a timeless workhorse.
Conclusion
The CAT 785D isn’t just a mining truck — it’s an industry benchmark. With its 1,450 hp engine, 142-ton payload, and unbeatable reliability, it continues to power some of the toughest operations on Earth. From open-pit mines to remote construction sites, the 785D delivers performance that never quits.
It’s a living example of Caterpillar’s engineering excellence — massive, powerful, and unstoppable.
FAQs
What is the payload capacity of the CAT 785D?
It can carry up to 142 metric tons (313,000 lbs) per load.
How powerful is the engine?
It features a 1,450 hp Cat 3512C HD diesel engine with 6,500 Nm torque.
What is the top speed of the CAT 785D?
It can reach 56 km/h (35 mph) even when fully loaded.
Is it still in production?
Yes, Caterpillar continues producing upgraded versions of the 785D for global markets.
How much does a new CAT 785D cost?
A new unit costs between $1.9 million and $2.2 million USD, depending on configuration.