Advice 1: How to change the grub castle

Cylinder locks are the most common among locks. Their distinctive feature is the presence of larvae, which hides the lock mechanism. Yourself the keys of such locks are flat and small, that guarantees the comfort of wearing them. So, if such a lock will jam and refuse to function normally, it is easy to change without removing the whole castle, and only by changing the cylinders. However and keys will need new.
Larvae in all cylinder locks, the standard
Replacement larvae in the castle begins with her choice. All larvae are standard and will easily fit to any cylinder lock. So there are plenty to choose. As a rule, to each door lock cylinders comes with 6 keys.
Now you need to remove the old worthless maggot. It is very simple. First, insert the key into the keyhole and turn to the door was open. Leave the key in the lock, it is still useful. Then remove the screws that secure the outer plate of the lock. This plate is located on the rear face of the door and she closes the lock. The next step – Unscrew the screw at the center of the tongue and lock, turn the lock key degrees for 40 to a position in which the striker freely released from the bed of the castle. Remove the larva.
If there is no key or mechanism in the larva completely broken, that this larva extract have to use a drill. Drill with diameter 10 mm, drill a core larvae. The idea is that after this procedure, the larva should be freely removed without using the key.
A new cylinder is inserted in the lock and all of its installation is similar to removing, but in reverse order. First, insert the key into the cylinder and rotate it in such a position that the flag of the larvae did not prevent her to pass freely in the bed of the castle. If you have correctly inserted, the bolt should be easily screwed in to attach the larva to the castle. It remains only to mount the end plate.

Advice 2 : How to change the larva in the door lock.

If the door lock was not working properly, it is not necessary to change it entirely. Quite possibly worn in the larva. In this case, only need to replace it, and the lock will work again like new.
How to change the larva in the door lock.
Make sure that the cylinders do need to be replaced. Perhaps you only need to lubricate. To do this, take the key, dip it in engine oil, insert it in the lock, and scroll a few times. If he began to rotate smoothly, so the problem is resolved.
If the lubrication did not help, the larva will have to be replaced.Have mortise lock and remove end plate middle screw located parallel to the cylinders. Insert the key and rotate it into a position in which the mechanism can be removed. Remove it. Screw save.
Slip the lock will have to be removed from the door. Having done this, Unscrew the two screws that secure the striker to the lock body and remove it. These screws will also save.
Removed a larva take to the hardware store, putting in a door attendant who will be on duty while it is open. If not, do this: take a picture of the mechanism next to a ruler, and then install it in place. If the lock mortise, screw the Central screw, and if the invoice that you install it on the door. To the store take phone or camera with a photo of the larvae, or a printout of this picture.
Ask the seller to pick up instead of liczniku, a verified manufacturer. Be sure to ask what material is made the mechanism. If he silumin, give up buying and go to another store.
By purchasing and bringing home the larva, remove the old if it is still in the castle. If mortise lock, turn the key to the position where to insert the mechanism into the hole, insert it there, and then fix the Central screw in the end plate. To overhead lock screw larva with two screws, and then install it on the door.
Make sure that the lock works properly without closing the door. Then close and repeatedly lock and unlock it. Now the lock can be used.New larva has a long handle it carefully. Do not force when inserting, removing and turning the key. Regularly lubricate the mechanism in the manner described in step 1. Never lubricate the lock in other ways (for example, by pouring oil directly into the well).
Never lock the door, making sure to clear the mechanism.
Is the advice useful?