C3.4B Engines for Caterpillar Built Machines Caterpillar


Inlet and Exhaust Valve Guides - Remove and Install

Usage:

CD-44B 398

拆卸步骤

表 1
所需工具    
工具     零件号     零件描述     数量    
A     444-0978     气门导管冲头     1    

开始:

  1. 拆下进气门和排气门。 请参阅拆解和组装, "进气门和排气门 - 拆卸和安装"。


注意

必须由经过正规培训的专业人员拆卸气门导管和气门座。 还需要使用专用机械设备。 有关更多信息,请咨询授权 Caterpillar 代理商。





    图 1g03003636

  1. 使用工具 (A) 将气门导管 (2) 从缸盖 (1) 上拆下。

  1. 有关其余的气门导管,请重复步骤 1。

安装步骤

表 2
所需工具    
工具     零件号     零件描述     数量    
A     444-0978     气门导管冲头     1    
435-3148 限动环     1    
B     442-7298     气门导管铰刀     1    


注意

必须由经过正规培训的专业人员拆卸气门导管和气门座。 还需要使用专用机械设备。 有关更多信息,请咨询授权 Caterpillar 代理商。



注意

保持所有零件清洁无杂质。

杂质会造成快速磨损和缩短部件寿命。


  1. 清洁缸盖中用于气门导管的母孔。



    图 2g03003639

  1. 润滑新的气门导管 (2) 并将气门导管放置到位。 小心轻敲气门导管以开始安装。 使用工具 (A) 将气门导管安装到缸盖中。

  1. 对其余的气门导管重复步骤 2。



    图 3g03005596

  1. 检查气门导管 (2) 的凸出 (X) 。 气门导管应突出气门弹簧凹槽上方 8.5 ± 0.15 mm (0.33465 ± 0.00591 in)。 有关更多资料,请参阅技术规格, "缸盖气门"。

  1. 安装气门导管 (2) 后,必须将气门导管铰孔至精加工直径。 遵循步骤 5.a 至 5.c 以便铰孔气门导管。

    1. 使用清洁的发动机机油润滑气门导管 (2) 的孔。

    1. 使用工具 (B) 铰大气门导管。 确保作用在工具 (B) 上的压力均匀。

    1. 确保缸盖清洁且无机加工碎屑。

  1. 检查气门导管 (2) 的精加工直径。 有关更多资料,请参阅技术规格, "缸盖 - 气门"。

  1. 检查气门低于缸盖表面的深度。 有关更多资料,请参阅系统操作、测试和调整, "气门深度 - 检查"。

End By: 安装进气阀和排气阀。 请参阅 拆解和组装, "进气门与排气门 - 拆卸和安装"。

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