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泰山-12拖拉机的液压系统有这样一种故障:低速时农具能够提升,高速时反而不能提升;反复加大减小油门,故障就反复出现。对此,许多机手感到莫名其妙,往往大拆大卸,甚至农忙季节误了农时。其实故障很小,就是液压油泵杜塞上的一根挡销折断了。只要换一根挡销,故障就排除了。为什么一根小挡销断了会出现以上故障呢?这需要从结构和工作过程说起。如图所示,柱塞的中心孔内有一个钢球,柱塞上端穿一根挡销。钢球在工作中起单向阀的作用,挡销可防止高速时钢球脱出。在工
Taishan -12 tractor hydraulic system has such a failure: low-speed farm tools to enhance, but can not be improved at high speed; repeated increase to reduce the throttle, the fault recurring. In this regard, many machine hand feel baffling, often big demolition, even the agricultural season mistakenly agricultural time. In fact, the fault is small, that is, a plug on the hydraulic pump Ducey broken off. Just change a stopper, the fault is ruled out. Why a small block off the above failure will occur? This needs to start with the structure and work process. As shown, there is a steel ball in the center hole of the plunger, and a stopper is put on the upper end of the plunger. Steel ball at work from the role of one-way valve, retaining pin to prevent high-speed steel ball prolapse. At work