据四柱液压机厂家技术工程师分析，导致630吨液压机动作缓慢的原因比较多，应采取排查方法进行处理，具体原因可表现为：
1. Reason: There is air in the hydraulic cylinder.
Solution: Exhaust through the exhaust device, and check whether there is air inhalation at the sealing ring of the reciprocating part of the piston rod. If there is, it may be a failure of the sealing ring, and the sealing ring should be replaced.
2、原因：液压泵运转有不规则现象，泵转动有阻滞或轻度咬死现象
Solution: repair or replace the hydraulic pump.
3、原因：四柱液压机缓冲装置启动时，活塞暂时停止或逆退。
Solution: This is because the orifice of the one-way valve is too small, so that the amount of oil entering the buffer chamber is too small, and even a vacuum occurs. This failure should increase the orifice of the one-way valve.
4. Reason: When the piston movement speed is high, the steel ball of the one-way valve follows the flow, which blocks the valve hole and causes the hydraulic cylinder to act irregularly.
Solution: replace the steel ball with a pilot valve poppet valve spool.
5, hydraulic press hydraulic cylinder action is not flexible. The inner layer of the rubber hose is peeled off, so that the oil circuit is broken on and off, resulting in irregular action of the hydraulic cylinder.
Solution: replace the rubber hose.
6、液压缸承受一定的横向载荷也是导致四柱液压机动作缓慢的一个原因。
Solution: The same exclusion method as the hydraulic cylinder cannot act.
7. Poor liquid filling.
解决方法：检查其密封性能
8. Pump wear or burn
解决方法：若泵的回油口漏损量大于4升/小时应拆下检查。
9. The leakage in the system is serious.
解决方法：检查各部密封圈是否损坏，如有损坏更换同规格密封圈
GEO-CANARY-86EA1707