Komatsu WA320-6 wheel loader replaces the WA320-5 and has an operating weight of 31,590 to 32,070 pounds and a heaped bucket capacity of 3.0 to 4.2 cubic yards. It is powered by a 167-horsepower Komatsu SAA6D107E-1 diesel. Hydrostatic transmission system allocates power as needed and adjusts automatically to the tractive effort demands on the machine. Traction control switch controls tire slippage at low speeds. Breakout force is 29,060 pounds, and static tipping load is 27,635 pounds straight.