3408E and 3412E Engines for Caterpillar Built Machines Caterpillar


Engine Has Mechanical Noise (Knock)

Usage:

3412E 1KR

可能原因

附属设备

  • 隔离噪音源。

发动机内部部件

  • 配气机构部件

  • 活塞

  • 曲轴

  • 齿轮系

建议的措施

隔离噪音源

隔离噪音源。 拆下可能有故障的发动机附件。 检查可能有故障的发动机附件。 如有必要,修理发动机附件和 / 或更换发动机附件。

配气机构部件

拆下气门机构盖和凸轮轴盖。 检查下列部件有无损坏:凸轮轴, 气门弹簧, 挺杆, 推杆 和 气门桥。 彻底清洁配气机构部件。 确保所有气门都能自由运动。 更换所有损坏的零件。

发动机以额定转速操作时,可观察和测量气门旋转。

活塞

检查活塞有无损坏和磨损。 更换所有损坏的零件。

曲轴

检查曲轴和相关部件。 检查曲轴上的连杆轴承和轴承表面。 确保轴承处于正确位置。 查找止推片和曲轴有无磨损。 检查配重螺栓。 更换所有损坏的零件。

齿轮系

检查齿轮系的状况。 检查发动机机油滤清器有无非铁质材料。 更换所有损坏的零件。

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