我们在检查WY100全液压挖掘机回转液压马达制动时所发生明显敲击声这一故障时,需要检查或调整背压油路上的补油压力。但在整机出厂时,背压阀的调定背压力是制造厂预先调定的,在整个液压系统中无法显示其压力。为了解决这个问题,我们搞了一个测压装置(如图1、2所示)。测量时只需将回转液压马达补油阀上的内六角螺塞拆下,换上带有压 We check the WY100 full hydraulic excavator slewing hydraulic motor brake knock occurred when the sound of this failure, you need to check or adjust the back pressure on the oil pressure. However, when the machine is shipped from the factory, the set back pressure of the back pressure valve is preset by the manufacturer and can not be displayed in the entire hydraulic system. In order to solve this problem, we made a pressure measuring device (shown in Figure 1,2). Only need to be measured when the hydraulic rotary valve hydraulic valve plug on the hex plug removed, replaced with pressure