The role of the leather case machine mechanical maintenance
　　(1) make mechanical often is in good condition, ready to start running or the car.
　　(2) under the condition of reasonable use, not for damage and stop halfway.
　　(3) in use process does not affect safety or drive by accident in the parts.
　　(4) mechanical assembly, parts and components technical conditions remain balanced, achieve the longest overhaul interval.
　　(5) oil, tyres and spare parts to meet minimum consumption level