C13, C15, and C18 Tier 4 Interim Engines Caterpillar


Crankcase Pressure Is Low

Usage:

C18 BDN
本程序涉及以下故障诊断代码:

注: 以下代码可能不适用于特定的应用。

表 1
故障诊断代码    
CDL 代码     J1939 代码     说明
(代码说明可能不同)    
注释    
E994(2)         曲轴箱压力低     当曲轴箱压力已低于最小值编程设定的时间长度时,发动机控制模块(ECM)激活此代码。 黄色报警指示灯会点亮。 记录该代码。 发动机功率减额。    



图 1g02211761

典型的曲轴箱通风系统

(1) 曲轴箱压力传感器

(2) 呼吸器

(3) 滤清器壳体

(4) 烟气排放管




图 2g02013955

发动机左侧

(5) 单向阀

可能原因

  • 机油加注口盖关闭。

  • 油位表(油尺)未完全座合。

  • 未安装曲轴箱通气滤清器。

  • 呼吸器和呼吸器滤罐之间的管未连接。

发动机配有开式曲轴箱通风系统。

建议的措施

表 2
故障诊断与排除测试步骤     数值     结果    

1. 发动机通风

A. 建立 Caterpillar 电子技师(ET)和 ECM 之间的通信。 如有必要,请参阅故障诊断与排除, "电子维修工具"。

B. 在执行任何故障诊断与排除或清除故障诊断代码前,从发动机 ECM 下载"保修报告"。

C. 检查发动机。 查看有无以上列出的情况。
   

通风
   

结果:找到了可能的原因。

进行必要的修理。

复位所有激活的代码并清除所有记录的代码。 利用 Cat ET 确认故障已排除。
   

按所列步骤顺序完成以上步骤。

如果以上步骤未解决问题,请联系当地 Cat 代理商的技术通信员(TC)。 如需进一步的帮助,您的 TC 可以通过代理商解决方案网络(DSN)与您交谈。

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