Caterpillar launch two new Ultra-Class trucks
Company introduces its latest electric-drive mining trucks – the 798 AC and 796 AC
CATERPILLAR continue to expand their Ultra-Class mining truck offering. Following the successful introduction of the 291-tonne (320-ton) capacity 794 AC truck at MINExpo 2016 and investments to further advance the 363-tonne (400-ton) 797F mechanical-drive truck, the company is now introducing the 798 AC and the 796 AC.
The new electric-drive 798 AC offers a 372-tonne (410-ton) payload capacity and will join the fleet of more than 1,000 Cat mechanical-drive 797s in the 400-ton class. The new electric-drive 796 AC delivers a 326-tonne (360-ton) payload and will be offered in all regions, whilst the 795F AC, in the same size class, will continue to be offered in regions where engine emissions are less regulated. Both trucks will be available in second quarter 2019.
The design of the new trucks focuses on delivering class-leading payload, high reliability and simple serviceability. These attributes are built on the frame and chassis design proven in 18 million hours of legacy truck operation and now used by the Cat 794 AC.
The AC powertrain of each of the two new trucks draws from around 5 million hours of Cat 795 AC and Cat 794 AC truck operation. Developed and manufactured by Caterpillar, the Cat AC electric drive is the single source for the entire powertrain.
The Cat C175-16 diesel engine powers both of the new trucks. With more than 21 million hours of operation in mobile equipment and power generation, the reliable engine can be configured to meet US EPA Tier 4 emissions regulations and offers a choice of 2,610kW (3,500hp) or 2,312kW (3,100hp).
The 796 AC and 798 AC are built for efficient production. Both truck models are designed to minimize empty machine weight, as configured in the field. The design allows the 798 AC to carry its class-leading payload of 372 tonnes (410 tons) and to haul more material each cycle on 59/80R63 tyres.
The new trucks feature four-corner, oil-cooled disc brakes as well as dynamic retarding for stable handling and effective stopping. Superior retarding capability, blended braking and the Cat Traction Control System help boost productivity while enhancing safety.
The Cat AC drive is a high-voltage system (2,600V) that operates at lower current than most of the competition. When combined with Cat’s total integration and design of the truck and drive system the result is said to be higher efficiency, lower heat generation, smaller and lighter components, and longer component life.
The Cat High Efficiency (HE) body is sized and configured to meet the specific needs of a mine, dictated by fragmentation, abrasion, cohesion and the loading tool. The curved floor, front, and canopy strengthen the entire body, which is integral to the truck. The body is sized to meet the payload requirements without compromising vehicle balance, braking or control.
Open engine access and service platforms ease maintenance tasks. The modular design allows for easy removal and installation of components. The engine, traction alternator, motors, inverter, grid and final drives can be removed independently, whilst the traction alternator and optional inverter platforms allow for easier inspections, diagnostics and component swaps, resulting in reduced service time and greater uptime.
