Union Lock on an Aluminium Front Door

[psarinuk]

Hi,

Recently, my wife reported that the key would not go in or turn on the lock on the front door (pictures attached).

While it did work eventually and I have since submerged the lock with plenty of WD40 from inside (by pressing the latch and also by removing the screws) and outside (through key hole), I wonder if the lock is actually on it way out.

This is due to me still feeling a small restriction when turning the key at the middle of its travel. I was going to apply some spray on grease but I am leaving WD40 to work its wonders for now.

Any help/ guide on how to remove this lock and service it would be great. If replacing is a better option, I am fine with that too.

Many thanks.

 

[crank39]

Remove the 2 visible screws and slide the lock away, you can then insert the key into the cylinder outside and see if the restriction is still there or then with a flat bladed screwdriver try operating the lock to see if that's playing up, either way now might be a good time to upgrade it to a better lock and cylinder, something that can be double locked judging by the amount of glass you have in the door

 

[psarinuk]

Thanks Crank39,

I've another "Mortise lock with Euro Cylinder" lock on this door that is situated underneath this lock (not visible in this picture).

Can you please suggest a good replacement of this lock?

Are these locks easy to replace? If you could tell me its name, I can look up some guides/ videos online.

Edit: Just researched that its called rim cylinder lock!