303E CR, 303.5E, 304E, 305.5E and 305E Mini Hydraulic Excavators Machine Systems Caterpillar


Main Control Valve - Remove

Usage:

303E CR CR7

拆卸步骤

表 1
所需工具 
工具  零件号  零件描述  数量 
138-7575  连杆支架 

开始:

  1. 拆下发动机罩。

  2. 释放系统压力。

注: 为便于安装,在所有管路、软管、导线和管子上做出识别标记。 封堵所有管路、软管和接管,以防止油液损失和污染物进入系统中。

  1. 将液压油箱中的油排入适当的容器以便存放或处置。 请参阅操作和保养手册, "液压系统机油 - 更换"。


    图 1g02848914

  2. 松开卡箍 (3)。 拆下螺栓 (1),然后拆下空气滤清器壳体组件 (2)。


    图 2g02848926

  3. 拆下螺栓 (4) 并将燃油注油泵支架放到一旁。


    图 3g02848954

  4. 断开软管组件 (5)、 (6)、 (7)、 (8) 和 (9)。 断开配线线束 (10)。


    图 4g02848968

  5. 断开软管组件 (11) 和软管组件 (12)。


    图 5g02848983

  6. 断开软管组件 (13) 和 (15)。 断开管 (14)。


    图 6g02848992

  7. 断开软管组件 (16)。


    图 7g02848998

  8. 将适当的起吊设备连接到主控制阀 (17)。 主控制阀 (17) 的重量约为 80 kg (175 lb)。 拆下螺栓 (18) 和主控制阀 (17)。


    图 8g02849006

  9. 拆下螺栓 (19) 并将支架 (20) 从主控制阀 (17) 上拆下。

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