1台柳工CLG856型装载机作业过程中,挂入前进或后退挡均无动作。连续几次挂入前进或后退挡后,再退入空挡,这样反复几次,该机行走方可恢复正常。有时发动机启动后准备作业时,该机无行走动作。初步分析是电控系统出现故障。该机配置了ZF品牌的4WG200型电液换挡变速器,具有4个前进挡和3个后退挡。该型变速器电控系统主要由电控盒1、4WG200型变速器2、换挡手柄3、线束 1 Liugong CLG856 loaders during the operation, linked into the forward or reverse gear are no action. Several times linked into the forward or backward gear, and then retreated to neutral, so repeated several times, the aircraft can resume normal walking. Sometimes when the engine starts to prepare for work, the aircraft no walk action. The initial analysis is the electronic control system failure. The machine is equipped with ZF brand 4WG200 electro-hydraulic shift transmission, with 4 forward and 3 reverse gear. This type of transmission electronic control system mainly consists of electronic control box 1, 4WG200-type transmission 2, shift handle 3, wiring harness