What should I do if I find that the valve leaks?

1. It is found that there are carbon deposits, burning loss and spalling on the mating conical surface of valve head and valve seat. When it is slight, the valve and valve seat can be ground manually. If the sealing performance of the valve cannot be restored by grinding, the valve seat can be hinged first, and then the valve and the valve seat can be ground. If the damage is serious, it should be replaced.

2, the gap is too small is caused by loose adjustment screw, should be regularly checked and adjusted.

3. The gap between the valve stem and the conduit is large, and the valve stem is bent or the valve head is deformed, so it needs to be replaced with a new one.

4. If the valve stem is stuck in the conduit due to carbon deposition, it can be cleaned with gasoline after removing carbon deposition, and the blades can be reused. The fit clearance between the valve stem and the guide tube becomes larger and can be adjusted to the specified clearance value.

5, locomotive running can't slam on the accelerator and frequent speed change, in order to prolong the service life of the valve spring, the spring is too soft or broken and must be replaced.

6, pay attention to check whether the decompression mechanism is working properly.