The paper gives a detailed comparison and analysis to running circumstance and characteristic of main parts of 789C Caterpillar tramcar and 730E Komatsu tramcar, which provides information for colleague on choice, employment and maintenance.

• 对卡特彼勒公司的789C卡车和小松公司730E卡车的主要部件运行工况和特点进行了详细的对比分析，为同行在选择，使用、维护等方面提供了资料。