How do you replace the locking mechanism of a sliding patio door?
A well-functioning lift lock is essential for the smooth operation of your lift sliding door. However, over time, the lock can wear out, which can cause various problems. Do you notice that your door drops down when you close it? Or do you see that the pin in the handle is worn down? These are clear signs that the mechanism is worn out and the GU lift lock needs to be replaced.
Step 1: Determine the correct thorn size
Before purchasing a new GU lock, it is important to measure the spindle size. This is the distance from the front of the lock to the center of the cylinder. Note: the lock is always slightly recessed in the door. Therefore, you should measure from the front of the lock and not from the front of the door.
-
Do you have a thorn size of 37,5 mm? Then you have a GU 934 hefslot necessary.
-
Do you have a thorn size of 27,5 mm? Then you must have a GU 937 hefslot to use.
Step 2: Remove the old GU locking mechanism
-
Open the door and set the lever to the highest position.
-
Loosen the mounting screws of the lock.
-
Carefully pull the old GU lock out of the door.
Step 3: Installing the new GU locking mechanism
-
Slide the new GU locking mechanism into the correct position.
-
Screw it tight.
-
Check if the lever operates smoothly and if the door closes properly.
By replacing the GU lift lock in time, you prevent further damage and keep your lift sliding door functioning optimally. Want to make sure you order the right lock? Then carefully measure the backset and choose the corresponding type of GU lift lock. This way, you can enjoy a perfectly working sliding door again!
