C4.4 Industrial Engine Caterpillar


Air Inlet and Exhaust System - Inspect

Usage:

C4.4 444


应对进排气系统进行综合性目视检查。 确保系统没有渗漏迹象。

如果进气或排气系统有阻力,发动机的功率和效率就会降低。

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

    高温发动机部件可能导致灼伤。 进行发动机保养之前让发动机和部件冷却下来。


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

    接触正在运转的发动机会因热零件而导致灼伤或因旋转零件而导致伤害。

    在旋转的发动机上工作时,避免接触热零件或旋转零件。


  1. 检查发动机空气滤清器进气口和进气管道以确保通道没有被阻塞或压扁。

  1. 检查发动机空气滤清器滤芯。 用清洁的发动机空气滤清器滤芯更换脏的发动机空气滤清器滤芯。

  1. 检查发动机空气滤清器滤芯清洁的一侧有无灰尘的踪迹 。 如果观察到灰尘的踪迹,说明杂质正流过发动机空气滤清器滤芯和/或其密封。

    注: 发动机上可能安装两种断路曲轴箱通气孔,即滤清的通气孔和未滤清的通气孔。




    图 1g01274757

    典型未滤清的通气孔(断路)




    图 2g01277997

    典型滤清的通气孔(断路)

  1. 如果曲轴箱压力过大,请检查通气孔是否有堵塞物和碎屑。 关于正确的步骤,请参阅拆解和组装手册, "阀机构罩盖 - 拆卸和安装(滤清的通气孔)或拆卸和安装(未滤清的通气孔)"。 检查阀机构罩盖内是否有碎屑。 确保清除所有的碎屑。

    注: 阀机构罩盖 (2) 内的阀通气孔 (1) 不是可维修部件。 如果通气孔损坏,只能更换通气孔。

  1. 从通气孔 (1) 卸下通气管 (3) ,并检查是否有堵塞物。 如果通气管受阻,使用低压空气移除堵塞物。 如果已安装滤清的通气孔组件,则检查确保滤清器滤芯无油。 确保在适当的维修周期更换滤清器。 关于正确的步骤,请参阅操作和保养手册, "保养周期 - 500 小时"。 如果罩盖 (2) 内有堵塞物,请卸下罩盖。 关于正确的步骤,请参阅拆解和组装手册, "曲轴箱通气孔 - 拆卸和安装"。 检查通气孔是否有裂缝或外部损坏。 如果通气孔出现故障,请更换通气孔。

    注: 滤筒更换时,新滤清器不能注入机油。

Caterpillar Information System:

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