一台QY16型汽车起重机,去年因使用了冒牌进口液压油,造成总泵损坏, 更换新的双联齿轮泵后,使用不久发生变幅无力的现象。当时为了应急,曾将中心回转接头处的泵1和泵2的油管对调安装,使用到施工结束。通过检查、分析,中心回转接头不泄漏;总泵、变幅缸 A QY16 truck crane, due to the use of fake imported hydraulic oil last year, resulting in damage to the master cylinder, replace the new double gear pump, the use of the phenomenon of weakening soon. At that time in order to emergency, had the center of the rotary joint at the pump 1 and pump 2 pipe alignment installation, use to the end of construction. Through the inspection, analysis, the center rotary joint does not leak; master cylinder, luffing cylinder