一台“天工”产ＰＹ160Ｂ平地机出现了驱动无力,且从变矩器分动齿轮室通气孔溢油。维修人员排除了发动机、摩擦片式离合器、机械换挡变速箱以及其它传动系存在故障的可能性。更换了密封件,还更换了变矩器入口限压阀、出口限压阀、变速泵。试车后,故障并没有排除。我们进行了故 A “Tiangong” PY160B motor grader appeared to be weak, and spilled oil from the torque converter gearbox vent. Maintenance personnel eliminated the possibility of engine, friction plate clutches, mechanical shift transmissions, and other drive trains from failing. Replaced the seal, also replaced the torque converter inlet pressure limiting valve, outlet pressure limiting valve, variable speed pump. After the trial run, the failure was not ruled out. We did it