Power characteristics of career dump trucks are defined on the one hand by thermodynamic characteristics of impellent installation of the car (diesel engine), and with another technological working conditions of a dump truck in career (length of transportation, a profile of the line, overcome biases, etc.). Optimum value of power characteristics of dump trucks can be provided at relative equality of effective power of the engine of a dump truck and capacity of mountain weight spent for transportation. To the basic criteria of power efficiency in piper are accepted specific fuel consumption of diesel of a dump truck and specific power consumption of transport works.