Door closers are installed in many places in daily life. They protect people in public places and office buildings! If the user does not know about the door closer, he must not know how to maintain it. It is inevitable that any product will have more or less problems without maintenance; So Fulda taught us how to deal with the leakage of the door closer.

The working principle of the door closer is to realize the control of closing the door by relying on its internal powerful hydraulic system throttling. From the figure above, we can see that oil is basically present in the hydraulic system. If there is oil leakage, it means that the hydraulic system is broken. As we said earlier, the working principle of the door closer depends on the hydraulic system. Therefore, the oil leakage equals to the problem of the hydraulic system, and the consequences must be the problem of the entire door closer system. This is the reason why oil leakage must be handled. Now we are going to talk about how to handle it!
Generally speaking, the main reason for oil leakage is that the clearance of the gear support guide in the hydraulic system increases, and the sealing effect decreases when the seal ring is worn. If the problem is found, it is easy to solve it. First, check whether the gear and the support guide or the seal ring have problems and replace them; But this kind of precise work is better left to our relevant after-sales personnel!