卡特皮勒公司宣称,现场试验研究表明,789型载重汽车的生产效率比相当吨级的汽车高15～25％。在大多数应用中,该车的作业费用低于或等于其它相应的汽车。高效动力系现场试验表明,道路坡度在15％以下时,789型载重汽车动力系的效率为80～85％。该车由卡特皮勒3516型1800马 Caterpillar reports that on-site pilot studies have shown that the 789 is 15 to 25 percent more productive than a comparable tonne. In most applications, the car’s operating costs are lower than or equal to those of other corresponding cars. Field tests show that the efficiency of the power train of the Model 789 truck is 80-85% when the road gradient is under 15%. The car by the Caterpillar 3516 type 1800 horses