转向失灵一台拖拉机因故障被拉回,故障排除后,起动发动机,前轮自动向右摆到死点;再向左打方向,毫无反应,转向失灵了。分析这一现象,判断为转向阀产生故障,经拆卸检查,发现阀芯、人力转向单向阀和弹簧均无机械毛病,但是将转向阀零件清洗安装后,转向又恢复正常了。这是为什 Turn failure A tractor was pulled back because of failure, troubleshooting, start the engine, the front wheel automatically placed to the right dead point; and then hit the left direction, no response, steering failure. Analysis of this phenomenon, the steering valve to determine the failure, the demolition inspection found that the spool, manual steering check valve and spring are not mechanical problems, but the steering valve parts cleaned and installed, the steering and returned to normal. This is why