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一台小松WA320-3型装载机在停用一段时间后出现不能行走的故障。初步判断是停车制动不能释放所致。该机为液压制动,由图1可知,当停机制动器开关打到ON或发动机处于熄火状态时,电磁阀1断开,并打开排放回路c。于是,来自泵的先导回路中的油a流至排放回路c。滑阀2在弹簧3
A Komatsu WA320-3 loader failed to walk after a period of inactivity. The initial judgment is that the parking brake can not be released. The machine is hydraulic brake, as can be seen from Figure 1, when the stop brake switch is turned ON or the engine is off, the solenoid valve 1 is open, and open the discharge circuit c. Then, the oil a in the pilot circuit from the pump flows to the discharge circuit c. Slide valve 2 in spring 3