797 Off-Highway Truck Hydraulic System Caterpillar


Machine Preparation for Troubleshooting

Usage:

797 5YW

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

机器突然移动或释放气压或油压,可能对机器上或机器附近的人员造成伤亡。

为避免可能造成的伤亡,在测试和调整液压系统之前,遵照以下程序。


注: 机器上仅允许停留一位操作员。 让其他所有人员远离车辆或离开操作人员的视野。

  1. 把机器开到平整水平的地方。 远离正在工作的所有机器和所有工作人员。

  1. 将变速箱换档杆移到空档位置。 启动停车制动器。

  1. 完全升起卸载车斗。

  1. 停止发动机。 把发动机的起动开关转到 OFF(断开)的位置。



    图 1g00949966

    固定缆绳

  1. 将卡车车斗的固定缆绳连接到卡车后部。

  1. 轮子前后都塞上垫块。

  1. 在液压系统上执行任何工作之前,要确保释放所有空气压力和机油压力。 请参阅空气系统, "技术规格系统操作/测试和调整",了解更多信息。

液压系统包括举倾机构、制动器冷却、制动器作动和用于后轮轴油泵马达驱动装置的齿轮泵。 有关制动器、制动器冷却或后轮轴的更多详细信息,请参考以下模块:

  • 制动系统, "系统操作/测试和调整"

  • 动力传动系, "系统操作"

  • 动力传动系, "测试和调整"

转向系统和风扇驱动系统独立于其他液压系统。 有关这些系统的更详细信息,请参阅下述模块:

  • 转向系统, "系统操作/测试和调整"

  • 液压风扇驱动装置, "技术规格/系统操作/测试和调整"

故障的检查和排除也许很困难。 在以下几页中列出了可能的问题。 为了修复问题,请参考下面所列的问题和可能的原因。

问题和可能的原因的列表仅给出存在可能问题的指示,和可能需要修理的指示。 有时候,可能需要列表中建议以外的更多修理或其他修理。 请记住:一个故障通常不会仅仅由单个零件引发。 故障通常由某个零件与其它零件之间的关系引起。 此列表无法提供所有可能的问题和可能的原因。 维修人员必须要找到问题所在和问题的源头。 然后维修人员必须进行必要的修理。

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