324D, 325D, 326D and 329D Excavators and 329D MHPU Mobile Hydraulic Power Unit Machine Systems Caterpillar


Load Control Valve (Boom Cylinder) - Remove

Usage:

325D L A3R

拆卸步骤

开始:

  1. 释放液压系统压力。 请参阅拆解和装配, "液压系统压力 - 释放"。

注: 在所有软管、所有软管组件、所有导线及所有管组件上作出识别标记,以便安装。 塞住所有软管组件和所有管组件。 这将有助于防止液体渗漏,并有助于防止杂质进入系统。


注意

在检查、保养、测试、调整及维修产品时,请小心确保盛接油液。 在打开任何舱室或拆卸任何含有油液的部件前,请准备好盛接液体用的适当容器。



注意

保持所有零件清洁无杂质。

液压系统被异物污染会缩短液压系统部件的使用寿命。

为了避免污染物进入液压系统,总要在断开后塞住或盖住管路、管接头或软管。 罩住已解体的部件,然后在组装前正确清洁它们。

在更换任何主部件后,或特别是在部件故障后,正确清洁液压系统,以便去除全部污染物。


------ WARNING! ------

在工作温度下,液压油温度很高且处于压力下。 热机油能造成烫伤。

为避免可能的人身伤害,在断开或拆下任何液压管路或部件之前,请释放作业机具液压回路(动臂、斗杆、铲斗和回转机构)、行驶回路及液压油箱加注口盖处的压力。

仅当发动机停止并且加注口盖冷却到可以接触时方可拆下加注口盖。


------ WARNING! ------

配备锁止阀的油缸即使在软管拆卸后也会长时间保持高压状态。

如果拆卸锁止阀或解体油缸之前没有释放所有压力,则可能会导致人身伤亡。

拆卸锁止阀或解体油缸之前确保释放所有压力。




    图 1g01219716

  1. 松开螺母 (2)。 逆时针转动阀座 (1) 以便释放动臂油缸中的液压压力。


    图 2g01219715

  2. 断开软管组件 (3)。 断开管组件 (4) 和 (5)。 拆下螺栓 (6)。


    图 3g01219742

  3. 拆下螺栓 (8)。 需要两个人才能拆下负载控制阀 (7)。 负载控制阀 (7) 的重量约为 32 kg (70 lb)

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