3516C Generator Set Engines Caterpillar


Oil Contains Fuel

Usage:

3516C LY6
务必确认燃油稀释。 要求 Caterpillar 代理商向 Caterpillar 区域 SOS 实验室递交油样进行分析。

注: 有关更多信息,参考, REHS3007, "确定燃油稀释发动机机油的原因"。

可能原因

  • 密封件泄漏

  • 喷油器尖端

  • 输油泵密封件

  • 缸盖裂纹

建议的措施

密封件泄漏

如果发现泄漏,则拆下相关气缸上的喷油器,并目视检查喷油器 O 形密封圈是否损坏。 如果发现有损坏,更换损坏的密封件。 将喷油器安装到发动机上,然后确认修理已将故障排除。

如果发现有泄漏但 O 形密封圈状态良好,则喷油器可能有故障。 更换喷油器。 确保安装了新的调整文件。

喷油器顶端

使用 Cat 电子技师执行 "Cylinder Cutout Test(断缸测试)",以便识别出可能漏油的所有气缸。 已损坏或断裂的喷油器顶端可能会引起气缸漏油。 如果通过测试识别出该缸,则拆卸喷油器并检查喷油器顶端有无损坏。 检查喷油器顶端有无裂纹或破裂。 如有必要,更换可疑单体喷油器。

如果未找到泄漏部位,则向燃油箱中加入适当的染料。 使发动机在高怠速下运转数分钟。 关闭发动机,然后拆下阀室盖。 使用黑光在各喷油器周围检查染料的痕迹。

如果怀疑某一喷油器有泄漏,从受影响的油缸上拆下喷油器,并更换已损坏的密封件。 将喷油器安装到发动机上,然后将发动机重新投入使用。

输油泵密封件

检查输油泵的轴密封件周围有无燃油泄漏。 确保溢流孔未被堵塞。 必要时,更换输送泵。

缸盖裂纹

查找缸盖内喷油器的燃油供应油道有无损坏迹象。 查找有无销孔泄漏。 参考拆解和装配。

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