Cylinders and Half-Cylinders of Locks

Required materials:

• A new cylinder, compatible with your garage door
• A screwdriver (flat or Phillips, depending on the screws)
• Pliers (optional)
• Protective gloves (recommended)

Installation steps:

1. Preparation

• Open the garage door to release any tension on the mechanism. This will ease handling and prevent blockages.

2. Removing the old cylinder

• Inside the door, locate the screw that holds the cylinder to be replaced (often near the handle).
• It is perpendicular to the key insertion. Unscrew it.

3. Removing the old cylinder

• Insert the key into the cylinder, then turn it slightly (about 30°) to unlock the latch.
• Gently pull the cylinder out of its housing.

4. Preparing the new cylinder

• Compare the new cylinder with the old one to check their compatibility.
• Insert the key into the new cylinder to handle it easily during installation.

5. Installing the new cylinder

• Slide the cylinder into the designated slot on the lock.
• Turn the key to engage the latch in the correct position.

6. Replacing the locking screw

• Reposition the locking screw removed initially, then screw it back in firmly.
• Ensure the assembly is securely fastened.

7. Final test

• Try opening and closing the door several times to check proper operation.
• If there is any blockage or friction, adjust the alignment or tighten the screws if necessary.