Caterpillar introduced in September 2012 the new Caterpillar MT4400D AC Mining Truck as part of its ongoing investment in the Unit Rig products acquired through the acquisition of Bucyrus International.

The new Caterpillar MT4400 D series model integrates a Caterpillar 3516C HD engine and the Caterpillar 240T AC electric drive system with the Unit Rig MT4400 to create the Caterpillar MT4400D AC.

The new truck leverages Unit Rig’s 50 years of electric-drive mining truck experience and the thousands of units currently working in mines around the world. The strength of the Caterpillar engine and drive system and Caterpillar dealer support combine with the Unit Rig straightforward and easy-to-service design to create great value for mining customers.

The Caterpillar MT4400D AC takes its place in the Caterpillar large mining truck product line alongside the industry-leading Caterpillar 793D and 793F to provide an AC electric drive solution that meets the needs of many miners that do not require Tier 2 emissions and who are seeking a mining truck that balances productivity and operating cost.

Specification highlights:

• Caterpillar 3516C HD Engine
• Net Power – SAE J1995: 2,500 hp
• Nominal Payload Class (100%): 240 tons
• Top Speed – Loaded: 40 mph
• Turning Circle Diameter: 99 ft 8 in