C7.1 Industrial Engine and Generator Set Caterpillar


Cylinder Is Noisy

Usage:

C7.1 770

可能原因

  • 燃油质量

  • 气门间隙

  • 低压缩(气缸压力)

  • 喷油器

  • 活塞

建议的措施

燃油质量

  1. 检查燃油质量。 请参阅系统操作、测试和调整, "燃油质量 - 测试"。

  1. 如果发现燃油不合格,请执行以下程序。

    1. 排空燃油系统。

    1. 更换燃油滤清器。 请参阅操作和保养手册, "燃油系统粗滤器(油水分离器)滤芯 - 更换"和操作和保养手册, "燃油系统滤清器 - 更换"。

    1. 向燃油系统中加注符合操作和保养手册, "油液建议"中的标准的燃油。

    1. 充注燃油系统。 请参阅操作与保养手册, "燃油系统 - 充油"。

  1. 如果故障未消除,请参阅"气门间隙"。

气门间隙

  1. 请参阅故障诊断与排除, "气门间隙过大"。

  1. 如果故障还未消除,则转至"低压缩(气缸压力)"。

低压缩(气缸压力)

  1. 执行压缩测试。 请参阅系统操作、测试和调整, "压缩 - 测试"。

  1. 如果任何气缸存在低压缩,请调查原因并排除。

    压缩压力低的可能原因如下所列:

    • 预热塞松动

    • 活塞故障

    • 活塞环故障

    • 缸径磨损

    • 气门磨损

    • 缸盖密封垫故障

    • 缸盖损坏

  1. 执行所有必要的修理工作。

  1. 确保修理排除了故障。

  1. 如果未检测到故障,则转至"喷油器"。

喷油器

  1. 使用电子维修工具执行自动"断缸测试"。 如果在"低压缩(气缸压力)"中执行的压缩测试合格,"断缸测试"将会识别任何故障喷油器。

  1. 拆下任何有故障的电子单体喷油器。 请参阅拆解和组装, "电子单体喷油器 - 拆卸"。

  1. 安装新的电子单体喷射器。 请参阅拆解和组装, "电子单体喷油器 - 安装"。

  1. 重复1的测试。 如果噪声仍然很明显,卸下更换的电子单体喷射器并安装原来的电子单体喷射器。 请参阅拆解和组装, "电子单体喷射器 - 拆卸"和 拆解和组装, "电子单体喷射器 - 组装"。

  1. 如果故障仍很明显,请参阅"活塞"。

活塞

  1. 检查活塞有无损坏和磨损。 更换所有损坏的零件。

  1. 如果仍存在噪音,请联系 Cat 代理商的技术通讯员。

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