Thereby suggestions for the improvement of the failed units are put forward: (1)combining the two front pitman bearing seats into one, and adopting adjustable ball bearing;

• 针对这些问题，提出中型或重型机结构改进设计的建议：1.；将两副前连杆轴承座合二为一，采用双列调心滚子轴承，使其具有微调功能；