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1.液压系统压力低,造成割台、卸粮筒不能正常提升一台新1065B_1型联合收割机,未装割台时,割台油缸能够伸出,将倾斜喂入室升起。挂接好割台后,割台不能提升;扳动卸粮筒手柄,卸粮筒也不能伸出。检查前进无级变速指示盘,发现指针达不到最大位置。因此判定液压七路阀(国外进口件)中的安全阀回油开启压力低,从而造成整个液压系统压力低。原说明书中规定,安全阀损坏只能采取更换的办法。由于此时无配件,为应急,决定修复。取下安全阀,拆开后,根据其结构特点和工作原理,分析
1. Hydraulic system pressure is low, resulting in header, dumping can not be normal lifting A new 1065B_1 type combine harvester, header cylinder can be extended, the tilting feed chamber rises. Hook good header, the header can not be improved; pull handle unloading grain, unloading grain can not stick out. Check the CVT indicator disc and found that the pointer can not reach the maximum position. Therefore, the determination of hydraulic seven-way valve (imported parts) in the relief valve to open low pressure, resulting in low pressure throughout the hydraulic system. The original manual provides that safety valve damage can only be replaced by the way. Because no parts at this time, to emergency, decided to repair. Remove the safety valve, opened, according to its structural characteristics and working principle, analysis