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1台XG958型装载机在累计使用1110 h后,工作中出现无前进和倒退Ⅰ挡而前进和倒退Ⅱ挡速度变快现象。1.故障分析该型装载机配置的是杭齿4WG180型电液控制变速器,电源电压为+24 V。当打开电源时,电脑盒向换挡手柄提供+5 V电压。当操纵换挡手柄时,相关挡位将电信号传递给电脑盒。电脑识别换挡手柄的电信号后,向相关挡位继电器和电磁阀输出+24 V电压,最终通过电磁阀驱动变速器离合器实现变速器换挡。
1 Taiwan XG958 loaders in the cumulative use of 1110 h, there is no progress in the work forward and back Ⅰ block forward and reverse Ⅱ gear speed faster phenomenon. 1. Failure Analysis This type of loader configuration is Hang tooth 4WG180 electro-hydraulic control transmission, the power supply voltage is +24 V. The computer box provides +5 V to the shift lever when the power is on. When operating the shift lever, the relevant gear transfers the electrical signal to the computer case. After the computer recognizes the electric signal of the shift lever, it outputs a +24 V voltage to the relevant range relay and solenoid valve, finally shifting the transmission by driving the transmission clutch through the solenoid valve.