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一台VolvoL270型装载机在运行了8000h后,经常出现液力机械变速器油温(>120℃)过高的故障,并时常伴随有发动机冷却水温(>99℃)过高的报警现象。产生上述故障的原因有:变速器操作不当;变速器油位不正确;变速泵磨损或泵吸入口泄漏;变速器内部磨损;感温元件或温度仪表失效;变速器油循环管路堵塞。
A Volvo L270 loader often experienced overhydraulic fluid temperature (> 120 ° C) faults after 8000h of operation and was often accompanied by an alarm of excessive engine coolant temperature (> 99 ° C). The causes of the above failures are: transmission improper operation; transmission oil level is not correct; variable speed pump wear or pump suction inlet leakage; transmission internal wear and tear; temperature components or temperature instrument failure; transmission oil circulation line blocked.