美国卡特彼勒公司生产的943、953、963、973系列装载机静液压传动系统是一种先进且复杂的系统。该系统一旦发生故障,特别是系统内的静液压动力控制装量(简称HPCU)内部出现故障,要求修理人员具备较高的检测技术水平,使用专门的测试仪器才能把故障诊断出来。我国不少使用单位 The Caterpillar company’s 943, 953, 963, 973 series loader hydrostatic transmission system is an advanced and complex system. Once the system fails, especially the internal hydrostatic power control equipment (HPCU) internal failure, requiring repair personnel with a higher level of detection technology, the use of specialized test equipment to diagnose the fault. Many use units in our country