C4.4 Industrial Engine Caterpillar


Connecting Rod - Inspect

Usage:

C4.4 448
注: 如果更换了曲轴或缸体,则必须测量所有气缸的活塞高度。

  • 在安装原连杆中后,必须镗削新活塞销轴承孔。 请参考""。

注: 在安装活塞销时,务必要将新挡圈安装到活塞销的每一端上。 如果无法用手拆下活塞销,则加热活塞至温度为 45° ± 5 °C (113° ± 9 °F),以便帮助拆卸活塞销。 加热活塞至这一温度可能也有助于安装活塞销。

活塞销轴承

注: 本步骤需要由经过正确培训的人员执行,并且需要使用专业的机加工设备。

如果需要更换活塞销轴承但是没有更换原连杆,则必须执行以下步骤:

  1. 确定连杆的长度等级: 使用以下任一特性:

    • 标记

    • 颜色

    • 测量长度

  2. 从连杆上拆下活塞销轴承。 将新轴承安装到连杆中。 新轴承为半加工产品。 必须将新轴承孔偏心镗削至正确直径。 这个偏心位置由连杆的长度等级确定。 请参阅表 1。 技术规格, "连杆"中给出了活塞销轴承孔的正确直径。

    活塞销轴承中的镗孔的表面精度 ... Ra 0.8 微米

  3. 将活塞销轴承的端部机加工至正确长度。 除去所有锐边。 请参阅技术规格, "连杆"。

表 1 涉及以下信息:连杆的等级字母, 连杆的颜色代码 和 连杆长度。

表 1
连杆的长度等级 
等级字母  颜色代码  连杆长度(CRL) 
蓝色  163.081 至 163.114 mm (6.42050 至 6.42180 in) 

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