Failure analysis and troubleshooting methods of the decompression valve Failure Analysis:

1. Air is mixed in the oil 2. The damping hole is sometimes blocked

3. The roundness of the hole between the slide valve and the valve body exceeds the regulations, so that the valve is stuck

4. The spring is deformed or stuck in the spool valve, making it difficult for the spool to move or the spring is too soft

5. The steel ball is not round, the steel ball does not fit well with the valve seat or the poppet valve is not installed correctly

Exclusion Method:

1. Remove the air from the oil

2. Clean the damping holes

3. Repair the valve hole and spool valve

4. Replace the springs

5. Replace the steel ball or disassemble the cone valve for adjustment