C1.7 and C2.2 Industrial Engines Caterpillar


Fuel System - Prime

Usage:

C1.7 G34
注: 有关在所有燃油系统工作期间必须遵循的清洁度标准的详细信息,请参阅系统操作、测试和调整, "燃油系统部件清洁度"。

确保所有的调整和修理由经过适当培训的授权人员来执行。


注意

持续盘车不要超过30秒。 再次盘车前,让起动马达先冷却2分钟。


如果空气进入燃油系统,在起动发动机前,必须排除燃油系统的空气。 发生以下事件时,空气可能会进入燃油系统:

  • 燃油箱排空或燃油箱部分排放。

  • 断开低压燃油管。

  • 低压燃油系统存在泄漏。

  • 更换燃油滤清器。

按照下列步骤,排出燃油系统中的空气:



    图 1g03891128
    典型示例

  1. 确保燃油箱加满,且任何燃油阀(如有配备)处于"接通"位置。

  2. 如果应用具有重力供油系统,拧松通风螺钉 (1),使燃油流动。 当从通风螺钉流出的燃油没有空气时,用手拧紧通风螺钉 (1)。 如果燃油系统不是重力供油系统,则转至步骤 3。


    图 2g03891159
    典型示例

  3. 松开燃油细滤器上的通风螺钉 (2)。 将钥匙开关转到 "RUN(运转)"位置。

  4. 钥匙开关将允许电动充油泵操作。 当从通风螺钉 (2) 流出的燃油没有空气时,拧紧通风螺钉至扭矩为 24 N·m (212. lb in)。 然后,操作电动充油泵 2 分钟。

  5. 把钥匙开关转到"断开"位置。 此时,燃油系统应开始注油,发动机应能够起动。

  6. 操作发动机起动马达并拖动发动机。 在发动机起动后,以低怠速运转发动机至少 5 分钟。 对于恒速发动机,不要施加负载 5 分钟。

    注: 在此期间操作发动机将有助于确保燃油系统中没有空气。不要松开高压燃油管来排放燃油系统中的空气。 该步骤并不是必需的。

  7. 确保燃油系统无泄漏。

发动机停机后,在对发动机的燃油管进行任何维修或修理之前,必须等待 10 分钟以便释放高压燃油管中的燃油压力。 等待 10 分钟也将使低压燃油系统的静态充油耗散。 如有必要,进行小的调整。 修理低压燃油系统以及冷却、润滑或空气系统的任何泄漏。 修理任何泄漏的高压燃油管。 请参考拆解和组装手册, "燃油喷油管 - 安装"。

如果您检查正在运行的发动机,请始终使用正确的检查步骤以避免液体穿透危险。 请参考操作和保养手册, "一般危险信息"。

如果发动机不起动,请参阅故障诊断与排除, "发动机盘车但不起动"。

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