The sale by Komatsu Southern Africa of seven 1,902 kW AC electric-drive Komatsu 930E-4 ultra-large mining trucks to Anglo Platinum’s Mogalakwena mine near Mokopane (Potgietersrus) in Limpopo Province marks the debut of the largest Komatsu trucks to be sold into Africa.
It is also the first sale of Komatsu AC drive mining trucks into the South African market. Komatsu Ltd pioneered the development and production of AC drive trucks when it first introduced the 930E – the Dash 1 model – into the global market in 1996. AC drive trucks are more energy-efficient and have higher power performance and speed than equivalent DC drive units.
The 930E has become the most popular ultra-large mining truck in the world, with over 700 units sold. More than 280 units of the Dash 4 model, which made its global debut in 2006, have been sold to date.
The seven units on order for Mogalakwena mine are scheduled for delivery to the mine in December 2008 and January 2009.
The Komatsu 930E-4 dump truck, with a flywheel power of 1,902 kW at 1,900 rpm, is powered by a Komatsu SSDA16V160 (Cummins QSK60) engine and is equipped with a GE320AC drive system.
The standard 930E-4 unit has a payload of 292 tonnes, a heaped capacity of 211 m3, an operating weight (empty) of 210,187 kg and a maximum speed of 64.5 km/h.
It is fitted with GE GDY106 AC wheel motors with a continuous capability of hauling up to 12% equivalent grade and a standard gear ratio of 32.62:1.
The primary braking system of the AC dynamic retarding assembly has no moving parts or brake wear. The assembly’s maximum retarding capacity is 4,028 kW and a continuous retarding capacity of 2,462 kW.
The 930E-4’s hydraulic system is of a well-proven, simple design, containing a minimum of parts and piping. It is equipped with hydraulically activated, oil cooled, multiple service brakes.
The suspension comprises Komatsu’s exclusive Hydrair II system, which provides the smoothest ride and best protection in the industry for operator and truck alike.
The machine is equipped with Komatsu’s Vehicle Health Monitoring System (VHMS), which utilises WebCARE, a Web database that stores diagnostic information. The information used to determine the health of the equipment is provided from a remote location via satellite communications and the Internet on a near-real time basis
Benefits of the VHMS system include
- Preventative action to reduce the risk of machine failure.
- Preventing unscheduled machine downtime, as well as reducing scheduled downtime by preparing components in advance.
- Conducting maintenance scheduling and estimating optimal times for component overhauls.
- Keeping repair costs at the lowest possible level.
- Keep the machine highly productive by ensuring maximum availability.
Also incorporated in the 930E-4 truck, to ensure that overloading is avoided and productivity maximised, the operator can refer at all times to the Payload Meter III system, an electronic system that monitors and records all payload information.