重卡车气门的作用是控制进入和离开发动机的空气流量，以帮助调节发动机的燃烧过程。
安装和拆卸方法：
1. 拆卸气门前，先卸下气门弹簧，使用弹簧压缩器把气门压缩，然后把电子气门拆卸下来。
2. 把气门杆卸下，并检查气门杆是否有损坏或变形现象，如有必要要进行更换。
3. 清理气门座和气门排气渠，准备安装新的气门。
4. 安装新气门时，按照手册上的顺序进行装配，在安装好气门后，再安装气门杆和气门弹簧，并把使用的工具全部拆卸。
5. 启动发动机2000-3000转，观察气门运行是否正常。
注意事项：
1. 检查气门的尺寸和形状是否与发动机的规格匹配，避免装配不当或漏装的情况。
2. 在安装新的气门前，清理气门座和气门排气渠，以免产生摩擦或阻力。
3. 监视气门是否正常工作，如果出现异常，立即停止发动机工作，并检查气门的状态。
4. 在更换气门的同时，建议更换气门座，并使用专业工具进行检查和清洁。
总之，正确安装和维护重卡车气门可以保证发动机的正常运行，降低维修费用，并延长发动机使用寿命。
The job of the heavy truck valves is to control the flow of air entering and leaving the engine to help regulate the engine's combustion process.
Installation and removal method:
1. Before disassembling the valve, first remove the valve spring, use a spring compressor to compress the valve, and then remove the electronic valve.
2. Remove the valve stem, check whether the valve stem is damaged or deformed, and replace it if necessary.
3. Clean the valve seat and valve exhaust channel, and prepare to install a new valve.
4. When installing a new valve, assemble it according to the order in the manual. After installing the valve, install the valve stem and valve spring, and remove all the tools used.
5. Start the engine for 2000-3000 revolutions, and observe whether the valve is operating normally.
Precautions:
1. Check whether the size and shape of the valve match the specifications of the engine to avoid improper assembly or missing installation.
2. Before installing a new valve, clean the valve seat and valve exhaust channel to avoid friction or resistance.
3. Monitor whether the valve is working normally. If there is any abnormality, stop the engine immediately and check the status of the valve.
4. While replacing the valve, it is recommended to replace the valve seat and use professional tools for inspection and cleaning.
In conclusion, proper installation and maintenance of heavy truck valves can ensure the normal operation of the engine, reduce maintenance costs, and prolong the service life of the engine.
