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Boy, you would sure wants your brakes to have your brakes in good shape as you head down that road!
Quite a few of the mine trucks are diesel electric drive, so when they come down the haul roads, the electric motors provide dynamic braking to a large extent. Caterpillar haul trucks such as the 797B and 793C are powered just like the over the road 18 wheelers are. These haul trucks do not have dynamic braking, so rely on several sets of brake shoes per wheel. Caterpillar has started manufacturing diesel electric drive trucks already, but the size of the Cat trucks are not as large as Liebherr or Komatsu trucks. Still, when a mine truck is hauling in excess of 400 metric tons of ore or coal while traveling up the haul roads, brakes become super critical