Zinc Rods - Inspect/Replace
海水回路腐蚀可能导致冷却系统部件的早期损蚀，渗漏和可能出现的冷却系统污染。
在发动机海水冷却系统中插装锌棒来防止咸水的腐蚀作用。 锌与海水反应导致锌棒损蚀。 锌棒替代冷却系统的更为关键的发动机零件而受损蚀。 锌棒的快速氧化耗损可能说明存在不受控的来自未正确安装的电气附件或未正确接地的电气附件的电流。
锌棒必须在适当的周期进行检查。 锌棒必须在出现损蚀时予以更换。
在用海水加注铅管的最初 24 小时内，检查锌棒。 如果发现明显的锈蚀，每周对锌棒进行检查，或在发动机每运转 50 个小时后对锌棒进行检查。
注: Caterpillar 要求在达到规定的磨损率之前，每 50 个工时检查一次锌棒。
锌棒位置
不同的发动机锌棒数量和位置可能会有差异。
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| 图 1 | g01937139 |
两条锌棒位于机油冷却器中。 | |
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| 图 2 | g01937142 |
一条锌棒位于辅助水泵顶部。 | |
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| 图 3 | g02158846 |
三条锌棒位于后冷器上。 | |
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| 图 4 | g01937141 |
一条锌棒位于热交换器的入口中。 一条锌棒位于热交换器的出口中。 | |
检查锌棒
- 拆下锌棒。
- 用锤子轻微敲击锌棒。 如果锌棒已经损蚀，或锌棒成片剥落的话，应安装新锌棒。
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| 图 5 | g00104048 |
更换锌棒
- 将旧锌棒拧下来或将锌棒从螺塞上钻凿下来。 清洁螺塞。
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| 图 6 | g00104049 |
- 在带有管螺纹的新锌棒凸肩部涂抹适量 9S-3263 化合物 。 切勿在任何其他类型的锌棒上涂抹此化合物。 只在锌棒的凸肩上使用该锁定剂。 把锌棒安装在螺塞上。
- 在螺塞的外螺纹上涂覆 5P-3413 管道密封剂 。 安装锌棒。 请参阅技术参数手册，以了解有关扭矩规格的详细信息。
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