1. After one week to 10 days of use, all screws should be checked and tightened again.
2. Use the hydraulic oil recommended by the manufacturer, and the hydraulic oil with low freezing point should be used in cold areas.
3. Regular inspections should be carried out after being put into use. The inspection contents are: whether the installation screws are loose or lost, whether the connecting arm is in contact with the door body or door frame, whether the door body is deformed or loose, the buffer effect of closing the door, and the supporting guides. Is there an oil leak, etc.
4. Usually the following problems will occur after the door closer is used for a period of time:
1) The mounting screws are loose or missing, resulting in the door closer not being in the correct installation position and the connecting arm being damaged;
2) When the door closer is closed, the buffering effect becomes poor, resulting in the collision between the door and the door frame and the deformation of the door body;