The new D-Series Unit Rig model integrates a Cat 3516C HD engine and the Cat 240T AC electric drive system with the existing Unit Rig MT4400 to create the MT4400D AC.
The new D-Series Unit Rig model integrates a Cat 3516C HD engine and the Cat 240T AC electric drive system with the existing Unit Rig MT4400 to create the MT4400D AC. The new truck, with 2,500 net horsepower, has a rated payload capacity of 240 tons and a rated gross machine weight of 865,000 pounds. The MT4400D AC features dynamic retarding capacity, combined with rear wet-disc brakes. The truck’s drive train, says Caterpillar, also leverages the experience of Electro-Motive Diesel (a Caterpillar company) in inverter design and manufacturing. According to Caterpillar, the new Unit Rig MT4400D AC Mining Truck represents the company’s ongoing investment in the Unit Rig product range, acquired through the acquisition of Bucyrus International.
Caterpillar 770G and 772G off-highway trucks have nominal rated payload capacities of 40 and 52 tons, respectively, and use Cat C15 (770G) and C18 (772G) engines, with net power ratings of 477 (770G) and 550 (772G) horsepower.
Hitachi EH5000AC-3 rigid-frame off-road truck has the company’s new AC drive system.
The D7E crawler dozer, with its diesel-electric power train, has been upgraded with three dozing features
The Cat D6T crawler dozer has been updated for Tier 4 Final with a Cat C9.3 ACERT engine rated at 207 horsepower.