Domestic electric fork over stacker and a foreign electric stacker high compared to the general life of five to six years or six to seven years, these foreign electric stacker average annual working hours is also significantly lower than the domestic electric stack The average annual working hours of high-car. self propelled stackers in the normal work of four to five years, its performance compared with the new car there will be a clear gap, which is due to various types of parts, especially the wear parts of the power system, resulting in slow speed caused by the system Fever, lead to slow down the working hours, longer working hours, reducing work efficiency.