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GV气缸油封损坏

2024-10-17

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朱玉才 崔怀计

(华菱星马) 

变速箱型号:16SOB2201,变速箱透气孔喷气和齿轮油(见图1)。

故障信息:踩离合器时,变速箱透气孔处喷出气和齿轮油,挂档都正常。

故障分析:踩离合器时变速箱透气孔往外喷气一般为变速箱里进气所导致。

排查方法:

1.如果H阀漏气会导致该现象。拆除H阀长时间顶住H阀阀芯要是阀芯处漏气证明H阀有问题,没有漏气为正常,拆除后检测H阀没有漏气现象H阀正常。

2.检查高低档转换气缸油封是否损坏。拆掉高低档转换气缸,气缸内部如有大量油漏出,则油封损坏或没有安装到位,没有油漏出为正常。拆除气缸后未发现有大量油漏出证明该气缸油封正常(见图2)。

3.检查GV气缸。拆除GV气缸,如有油漏出则为油封损坏或没有安装到位导致该现象发生,没有油漏出为正常。拆除GV气缸发现内部有大量油漏出(见图3)。

判断为油封损坏或没有安装到位,把GV气缸拆除后发现气缸油封损坏(见图4)。

导致踩离合器时变速箱透气孔喷气和油。

解决方案:更换GV气缸油封,更换后试车正常,问题解决。

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