Main Hydraulic Pump Air - Purge
完成主泵维修或液压油更换后，请排除液压系统中的空气。 用下述方式排除液压系统中的空气：
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在检验、保养、测试、调整及维修发动机时，请小心确保盛接流出的液体。 在打开或拆解任何储有液体的部件之前，要准备好合适的容器收集液体。 有关适合收集和盛接卡特彼勒产品上的液体的工具和供应品，请参阅专门出版物, NENG2500, "卡特彼勒代理商工具目录"。 按照本地法规和条例处置所有液体。 |
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滚热的油或液压油的压力会对人员造成伤害。 发动机停机之后，液压油的压力仍会保留在液压系统里。 对液压系统进行维修之前，如果不事先释放压力，可能会造成严重伤害。 卸下液压系统的部件或管路时，确保所有的作业机具都已降到地面上，而且液压油温度已冷。 只能在发动机停机，并且加注口盖冷却到可以用徒手触摸时才能卸下加注口盖。 |
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| 图 1 | g01132310 |
泵室 (1) 放气塞 | |
- 发动机关闭后，从主泵顶部拆下放气塞 (1) 。 将放气塞 (1) 置于外面几分钟，直到主泵充满液压油。 当泵充满液压油时，拧紧放气塞 (1) 。
- 起动发动机并在低怠速下运转。 提升动臂并将动臂保持在升起位置。
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为避免损坏系统，请确保在起动前适当地给液压泵加注液压油。 |
- 关闭发动机。 缓慢地降下动臂，直至铲斗落在地面上。 此时液压油箱处于压力下。
- 缓慢地松开放气塞 (1) 。 松开放气塞 (1) ，直到液压油从放气塞 (1) 的开口中流出。
- 拧紧放气塞 (1) 。
注: 如果机器配有动臂下降控制阀，动臂油缸管路中可能形成液压油压力。 有关释放液压油压力的信息，请参阅操作和保养手册, "发动机停止时降下设备。"
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