Maintenance methods are shared with you:
1. Remove the Casement lock mechanism
2. Remove the cover plate with limit function
3. Make Casement mistakes up and down respectively
4. Casement turn the lower part up
5. Remove the roller bearing
6. Install a new bearing. It is recommended to replace the double-wheel bearing. The roller bearing is a needle roller-type bearing, which is relatively strong and can increase the force area. Each 3 yuan can use a hole, another hole needs to be changed, just use an awl to tie it, no electric drill is needed to punch.
Put Casement back, install upper cover, pay attention to cover it gently first, after the basic reset, use plastic screwdriver or rubber hammer to knock the center part, make sure it is completely reset, install the window lock, complete!
