The larva is the code part of the cylinder lock. It ensures the correct operation of the locking mechanism. If the lock is broken or the keys are lost, you can change the larva without dismantling the entire device. This significantly reduces the costs associated with installing a new device, and allows you to save the appearance of the door.
It is important to know that only a cylinder lock will succeed in replacing the core; in other models, this part simply does not exist.
How do I know if a larva can be changed?
To find out whether it is possible to do without a complete replacement of the lock, it is necessary to carefully examine the key and the end of the door, inside of which a failed locking device is installed.
- Replacement of the core is possible if the key is semicircular, flat with cutouts and notches, or crosswise. A round key with two blades and notches, designed to open level locks, suggests that it is impossible to change one core, leaving the case in place.
- Inspection of the metal plate of the mortise mechanism at the end of the door will also help solve the problem of the possibility of replacing the core. For constipation with a replaceable larva, a screw head for a Phillips screwdriver is located under the pins. This screw secures the core to the body. Unscrewing the screw, you can extend the core.
How to choose the right cylinder?
Before replacing the door lock larva, it is necessary to correctly identify the type of cylinder and pick up a new part.
First of all, the old mechanism is removed from the damaged device. To do this, remove the pads and unscrew the screw securing the cylinder.
Now you need to take the dimensions of the core - using a ruler to determine the total length of the part and the length of each part to the rotary cam.
It's better to go to the store with a broken cylinder (of course, if possible). An experienced seller of all the commercially available larvae of door locks by parameters will certainly select the suitable part.
When buying a new larva, the following points are important:
- compliance with the castle parameters;
- degree of protection against hacking;
- quality of materials of which the iron core is made.
There are locks in which the replacement of the cylinder is not provided. Then you have to reinstall the entire mechanism completely.
Replacement Instructions
If the invoice lock, the housing must be removed from the door leaf and only after that the core must be replaced. The new cylinder is inserted into the body, reinforced with special screws and the fully assembled structure is hoisted to its original place.
When the mortise type mechanism is damaged, the core can be replaced in the door lock as follows:
- The key is inserted into the keyhole and rotated 180 ° until the swing arm hides inside.
- The cylinder is inserted into place, in a specially designated hole for it.
- Find a position in which the lock opens without problems.
- The device is installed in place, the protective and decorative pads are screwed.
How much on average does the lock core replacement process take?
If the new part is selected correctly and fully matches the type and size of the old cylinder, the larva can be replaced in a few minutes.
How to check the readiness of the device for work?
After installing the repaired mechanism, it is necessary to check its operation. This can only be done with the door open, otherwise there is a risk of staying on the street for a long time or, conversely, in the apartment! Only with complete confidence in the reliability of the new device can you check constipation by closing the door from the inside.
So, replacing the core of the castle is a matter of minutes. The main thing is that the part you bought is fully consistent with the established mechanism.