小松PC200-8型挖掘机回转机构常见不能回转、回转时有时无、回转速度缓慢、单侧回转异常等故障现象。本文介绍几例该型挖掘机回转故障的排查方法。1.不能回转该故障表现为发动机启动后,驾驶员操作回转手柄做回转动作时,挖掘机突然不能回转。对照该型挖掘机电路图(见图1)查找故障原因。首先,拔下V05接头,检测回转制动电磁阀电阻值为41Ω,在正常范围内。其次,拔下X05接 Komatsu PC200-8 excavator rotary mechanism common can not be slew, sometimes without slewing, slewing slow, unilateral rotation abnormalities and other symptoms. This article describes a few examples of this type of excavator slewing fault troubleshooting. 1. Can not turn The failure of the performance of the engine after the start, the driver operating the swivel handle do swivel action, the excavator suddenly can not turn. Control the excavator circuit diagram (see Figure 1) to find the cause of the malfunction. First of all, unplug the V05 connector, check swing brake solenoid resistance is 41Ω, within the normal range. Second, unplug the X05 then