How to change a Fichet monobloc 787 OR F3D cylinder ?

To change a Fichet 787 or F3D lock cylinder to a monobloc version, here are the steps to follow. It's important to note that Fichet locks are often high-security, so make sure you have the necessary equipment before you start.

Equipment required:

  • A new Fichet 787 or F3D cylinder
  • Screwdrivers
  • Your lock key (for ease of handling)

Steps to follow:

Open the door:

Make sure the door is open before you start dismantling. This will give you better access to the lock and prevent any jamming.

Remove the cylinder fixing screw:

Remove accessories (handle, covers on surface-mounted locks)

On the side of the lock (usually behind a cover), there is a fixing screw that holds the cylinder in place. Use a screwdriver to remove this screw.

Behind this screw you will find a washer which you will need to lower slightly with a screwdriver.

With the door open, insert the key and make 2 turns in the closing direction and the central bolt will come out of its housing.

Be careful not to undo the mechanism on Fichet A2p 3 star locks.

Remove the cylinder:

Once the bolt has been removed, pull the cylinder to release it from its housing. If the cylinder is stuck, it is sometimes useful to slightly lift the release part with a screwdriver to free it.

Inserting the new cylinder :

Take the new Fichet 787 or F3D cylinder and insert it into the lock housing. Make sure it is properly aligned, then turn the key in the cylinder a quarter turn in the closing direction and replace the central bolt at the same time turn the key in the opening direction.

Fixing the cylinder :

Replace the fixing screw you removed and tighten it to hold the cylinder in its housing.

Testing the lock :

Test that the cylinder works correctly by inserting the key and turning to check that it opens and closes the door correctly.

Additional tips:

If you have difficulty removing or inserting the cylinder, it may be worth contacting us for advice to prevent damage to the lock.

Make sure the new cylinder is compatible with your Fichet 787 or F3D model. Sometimes it is necessary to order specially adapted parts to ensure correct installation.

If you are not comfortable with the process or if the lock is complex, call our A2pro.com customer service team and a technician will advise you.