How to remove and extract the existing cylinder?

Removing the Old Cylinder:

A. Locate the Mortise Plate: Identify this plate on the door’s edge where the door meets the frame.

B. Unscrew the Cylinder: Locate the screw on the mortise plate that secures the cylinder. Use a suitable screwdriver to carefully unscrew and keep the screw safely for later use.

Extracting the Cylinder:

A. Insert the Key: Fully insert the original key into the cylinder.

B. Align the Cam: Rotate the key to align the cam with the body of the cylinder, ensuring it can be removed.

C. Remove the Cylinder: With the cam properly aligned, gently pull the cylinder out from its housing.