Springing to new life
Revitalized and repowered, both Komatsu 830E trucks are now performing at a higher level. Compared to the previous engines, the Series 4000 engines are a dramatic upgrade. “The trucks are operating faster, more reliably and with lower maintenance costs,” says Marcio. “The biggest advantage is lower fuel consumption. With the new engines, the trucks are close to 10% more fuel-efficient. For an operation of such a large scale, those savings are going to really add up.” “The second repowered truck started operating on Dec 15th, and after 135 days of continuous activity, our engine completed exactly 3,000 hours. These numbers gave us a daily average of 22.2 hours a day, which is an extraordinary fleet availability,” says Marcio. Vale is happy with the results, and has confirmed to mtu the approval of the repower project. Two more repowers with mtu engines were scheduled for spring 2017. In its previous life, the Komatsu 830E was showing signs of age, on the verge of a breakdown that would cost Vale truckloads of money. Today, under the broiling Brazilian sun, it rumbles along the winding dirt roads and switchbacks of Carajas Mine with new life.