Failure case
Model: R220LC-5
Failure phenomenon: there are pull marks on the arm cylinder, oil leakage user requirements: the quality of the product, replace the arm cylinder inspection steps:
1. During the inspection, the agent found a small axial pull mark on the surface of the piston rod of the oil cylinder, and there was oil leakage at the seal of the cylinder head
2. In order to eliminate the electric shock and other man-made causes of this failure, we require agents to do a careful inspection
3. After a detailed inspection, the agent believes that this fault is caused by a quality problem that is not caused by electric shock, and guarantees: if it is the cause of electric shock, they are responsible for purchasing the transfer parts
4. In this case, we allocated the accessories, but asked the agent to return the old parts quickly and pass the digital photos to the modern company branch
5. Through the analysis of the old parts and digital photos, it was found that the electric spark caused by the low-voltage electric shock on the cylinder rod can be seen after the photo is enlarged.
Troubleshooting experience:
When checking and analyzing the cause of the failure, you can not only look at the surface phenomenon, you must make full use of digital photos, computers and other tools, and you must learn from past experience.
