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1.故障现象1台配置杭齿6WG180型液力变速器的常林PY220型平地机,工作中出现油温过高、油压过低以及“等挡”故障。在发动机怠速、变速器冷态时,检测变速器油压为1.4MPa;在发动机怠速、变速器热态时,检测变速器油压为0.5MPa。挂挡时压力表显示为0～1.0MPa,且显示值不稳定,工作时变速器温度明显偏高,有时可达到120℃;各挡位均出现“等挡”现象,且将平地机挂档后,出现部分挡位突然起步现象。
1. Symptom 1 set with 6TG180 type hydraulic transmission Chang Lin Chang PY220 grader, the work appeared in the oil temperature is too low, low oil pressure and “stall” fault. In the engine idle, the transmission cold, the detection of transmission hydraulic pressure 1.4MPa; engine idle speed, transmission hot, the detection of transmission oil pressure 0.5MPa. Pressure gauge is displayed when hanging gear 0 ~ 1.0MPa, and the display value is not stable, the work of the transmission temperature was significantly higher, and sometimes up to 120 ℃; each gear appear “stall” phenomenon, and the grader hanging After the file, there are some sudden start gear phenomenon.