| 
 
 | 1. Disconnect drafts from the cylinder of the lock and the external handle. |  
 |  | 2. Unscrew two bolts and remove the external handle of opening of a door. |  
 |  | 3. Unscrew the screw and remove the lock cylinder from the external handle of opening of a door. |  
 | 4. Installation is made in sequence, return to removal. |  |