拖拉机液压系常见故障较多,须及时查明原因进行排除,以防损坏机件。1.农具不能提升主要原因是油泵内漏严重;限压阀弹簧折断或油泵至分配器之间的密封胶圈损坏。如遇到这种情况应及时修复或更换。若因差动阀卡滞或内回路滑阀卡住,应清洗研磨修复。若因控制杆件变形或松脱,应修复 Tractor hydraulic system more common faults, to identify the cause of the exclusion in time to prevent damage to the mechanical parts. 1. The main reason that farm implements can not be improved is serious pump leakage; the pressure-limiting valve spring breaks or the seal ring between pump and distributor is damaged. In case of such situation should be promptly repaired or replaced. Ruoyin differential valve stuck or loop valve stuck, should be cleaned and ground repair. If the control rod deformation or loose, should be repaired