C3.3B Engines for Caterpillar Built Machines Caterpillar


Inlet and Exhaust Valves - Remove and Install

Usage:

236D BGZ

拆卸步骤

表 1
所需工具 
工具  零件号  零件描述  数量 
5S-1330  气门弹簧压缩器 

开始:

  1. 拆下缸盖。

注: 请参阅技术规格 UENR3421 "发动机设计",了解非指定的发动机扭矩值。

  1. 清洁缸盖底部配合面。 在拆卸气门弹簧之前,检查气门低于缸盖表面的深度。 请参阅技术规格, "缸盖气门",以了解正确的尺寸。

  2. 在气门头上作出临时的识别标记,以便确定正确的位置。

  3. 使用适当的起吊设备放好缸盖,使气门弹簧朝上。 缸盖的重量约为 23 kg (51 lb)


    图 1g02784484

  4. 将工具 (A) 在缸盖 (2) 上安装到位,并压缩气门弹簧,以便拆下进气门和排气门 (1)。


    图 2g02788459

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

    被弹簧力爆出的零件击中,会招致人员伤害。

    确保穿上所有必要的保护装备。

    遵照建议的程序,并使用所有建议的工具以释放弹簧力。



    注意

    确保在四角均匀地压缩气门弹簧,否则可能会导致气门杆损坏。


  5. 向工具 (A) 施加足够的压力,以便拆下气门保持器 (3)。

  6. 缓慢地释放工具 (A) 上的压力。

  7. 在气门弹簧 (5) 上作一个临时识别标记,以便识别正确的位置。

  8. 拆下气门弹簧座 (4)。 拆下气门弹簧 (5) 以及进气门和排气门 (6)。

  9. 对其余气门重复步骤 4 至步骤 8。

  10. 拆下工具 (A)。


    图 3g02784644

  11. 将气门杆密封件 (7) 从缸盖 (2) 上拆下。

  12. 使用适当的起吊设备,翻转缸盖 (2)。

  13. 拆下进气门和排气门。

安装步骤

  1. 按拆卸的相反顺序安装进气门和排气门 (6)。

    1. 清洁缸盖组件的所有部件。 确保缸盖的所有端口、冷却液通道和润滑通道中无碎屑。 更换任何损坏或磨损的部件。

    2. 使用清洁的发动机机油润滑进气门和排气门 (6) 的气门杆。 将进气门和排气门 (6) 安装在缸盖的相应位置中。 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"。

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