Replacing a door lock: causes of breakdowns and detailed instructions for eliminating them

FacebookTwitterOkGoogle+PinterestVk

A lock located inside the front door must meet basic reliability requirements. This is necessary to ensure proper home security. Such mechanisms are subject to the greatest loads, so they are susceptible to various breakdowns. Replacing a door lock of this type requires certain knowledge and skills. It is important not only to know the type of lock, but also to understand its design features.

The lock mechanisms are subject to heavy loads, so they are susceptible to various breakdowns.

In what cases is it necessary to replace the lock on a door?

Among all possible breakdowns, there are several that occur most often. This or that malfunction can occur at any stage of operation of the locking mechanism. Knowing the cause of the breakdown allows you to promptly replace the device. Let's look at what malfunctions occur most often.

Replacing a door lock requires certain knowledge and skills

Helpful information! The most common problem that leads to the need to change the lock is the loss of keys. In this case, installing a new device is a mandatory precaution. Of course, you can remove duplicates from spare keys, but for the safety of your home it is still recommended to completely replace the lock.

Inserting a locking device may be necessary when purchasing a new door. Most entrance doors are sold without a locking mechanism, so the lock is selected individually for each specific case. Currently, it is possible to purchase a door equipped with a locking device, but in order to save money, it is better to install the door lock yourself.

Another common problem requiring replacement of the mechanism is the failure of the central part of the lock, which is called the cylinder (or lock). The reason for the malfunction of this element is usually the frequent use of the lock, which leads to wear of its parts.

Changing the door lock may also be necessary if the device does not meet the required security class. If the mechanism does not satisfy the owners, then it is most often replaced with a more reliable one.

A common problem requiring replacement of the mechanism is the failure of the central part of the lock.

Among other things, installing a new locking device may be necessary after burglars enter the apartment. In such a situation, experts recommend a complete replacement of the front door with all protective elements. It is also customary to carry out this event when transferring a home to new owners.

The most common breakdowns requiring replacement of the front door lock and their causes

Situations that lead to the need to replace the locking mechanism can be very different. This action is not always carried out in the event of a device failure. The locking mechanism is usually subjected to severe stress, which affects its components. This leads to their wear. Let's consider what malfunctions most often occur during the operation of door locks.

A fairly common problem is the malfunction of the tongue, which is responsible for holding the door in the closed position. In this case, you can completely change the lock, but the correct solution is to eliminate the damage. Most often this problem is caused by two reasons:

• skewed door leaf;
• misalignment of the tongue with the hole on the strike plate.

A fairly common problem is the malfunction of the tongue responsible for holding the door in the closed position.

You can correct the frame distortion yourself. To do this, it is necessary to adjust the hinges, which may come off due to weak fastening. The position of the strike plate can also be adjusted.

Many users of locking mechanisms face the same problem - the key getting stuck in the device. This trouble is most often associated with clogging of the internal mechanism. Replacing a door lock is sometimes easier than disassembling and cleaning it. In this situation, it is necessary to correctly assess your knowledge and capabilities. To eliminate this malfunction, it will be necessary not only to clean the mechanism, but also to lubricate its individual parts.

Note! During operation of the front door, another problem may arise due to wear and tear on the parts of the locking device. In such a situation, the mechanism responsible for opening the canvas jams. To eliminate this problem, it is necessary to disassemble the lock and check the return springs.

Less often than not, a locking device fails due to mechanical stress. This problem can be diagnosed very easily, since it is accompanied by a breakdown of the mechanism body.

Less often than not, the locking device fails due to mechanical stress.

Stages

There are three types of locking mechanisms: lever, cylinder, and with sliding bolts.

When repairing a cylinder lock, you need to know that it consists of a cylinder, a escutcheon and a handle. The secret mechanism is hidden in the larva. It has pins that, when turning the key, must fall into special recesses. The device is simple, so you can replace the lock cylinder with your own hands. You must first purchase a core of the same size as before. Sometimes only the handle breaks, and if this happens, then it will have to be repaired and replaced along with the core.

The basis of the disc lock mechanism is a cylinder, which consists of a set of discs. The shape of the cutouts and dimensions must match the cross-section of the keys. If the failure is in the disk device itself, then you need to purchase a new cylinder.

Replacing a lock can be divided into several stages:

1. Dismantling and extraction;
2. Repair (if possible and appropriate);
3. Installation.

How to remove from a metal door

If the mortise locking mechanism of metal entrance doors for some reason does not meet safety standards, it requires replacement as quickly as possible. The device has stopped working properly, sounds appear when turning the key, traces of mechanical influences are noticeable - you immediately need to remove the front door lock, make repairs or replace it with another one.

This procedure is not difficult. First you need to remove the fasteners. Once the screws are removed, you can pry the plate off with a screwdriver. Recesses for the locking mechanism and for the hole will be visible in the metal door leaf. There are also more complex models, when working with which all actions must be performed taking into account the design features.

Repair

Before restoring the locking system, it should be taken into account that each of them has differences. Repairing a metal entrance door lock without their knowledge is a guarantee of an assembly error. As a result, the device will not provide an adequate level of protection against unauthorized access.

Installation

If the removed structure is replaced by exactly the same one, no problems arise. If a lock of another system is installed on a metal entrance door, difficulties may arise. It will be necessary to use a special tool for working with metal products, since the sizes of the devices may vary.

Cylinder lock replacement process

The method of replacing cylinder locks on metal doors depends primarily on the reason. If the key breaks and gets stuck in the well or is accidentally lost, then it is more advisable to install a new cylinder, for which there is no need to completely dismantle the structure. The work order occurs in the following sequence:

• There is a locking screw on the end of the door that we need to unscrew.
• Next we go inside the room. Our task is to insert the key into the socket and turn it 10–15 degrees. With this action we displace the extended tongue of the secret mechanism that holds the larva in the nest.
• Now we remove the larva, pulling it together with the key “towards ourselves”.
• The replacement part must match exactly in length, diameter, mounting hole position and color.
• Install the new door lock part in the reverse order.
• If it is not possible to align the mounting screw with the hole, slightly move the cylinder until a positive result is obtained.

If the lock itself is damaged or wears out due to a long period of use, the entire case will have to be replaced. Initially, the algorithm of actions follows the same plan as for replacing the core. Once the larva is extracted, we need to follow these steps:

• Remove the door handle and protective trim. If the design includes a valve, remove it too.
• Unscrew the fixing screws. They are located at the end of the canvas.
• Now we can remove the mechanism, for which we will have to slightly pick up the end plate.
• We install a new lock on a metal door in the reverse order.

The process of replacing a lever lock

Lever locks are characterized by high reliability. It is not easy to break into such a structure, but changing the locks on a metal door will require patience and accuracy. As a rule, lever locks have to be replaced entirely. An alternative option, in which it is enough to change the core and recode the levers, is possible only for expensive foreign models. But in this case, you will have to purchase a part of the appropriate brand and manufacturer.

Let's look at how to change the lock on a metal door step by step.

1. The lock must be opened and the bolts are fully retracted.
2. We dismantle door handles, armor plates and deadbolts.
3. We unscrew the screws from the end part of the door leaf.
4. Now you need to pry the end plate of the lock and remove it.
5. The new lock must match all parameters of the socket and the location of the mounting holes. Install it in reverse order.

Replacing deadbolt locks

In modern designs of metal entrance doors, deadbolt locks are increasingly common. It is no coincidence that these mechanisms are considered the most reliable: in the closed position, metal pins located inside the door leaf fit into holes located on the sides, top and bottom of the frame. This way the door receives reliable protection from all sides at once. Since the deadbolt mechanism is a complex system, the question arises: is it possible to change the lock on a metal entrance door yourself, or is it better to invite specialists?

To change the deadbolt locks on a metal door, you will have to dismantle the door leaf and disassemble it. The further process is similar to replacing the lever structure, but you will first have to unhook the upper and lower bolts from the lock. To do this you will need a wrench. After installing the new locking mechanism, the bolts are reattached. The process is, in fact, quite complex and not everyone can do it. It's better to invite a master.

For the well-known saying “my home is my castle” to be true in practice, you should not skimp on choosing a lock for the front door. The mechanism is reliable; careful handling and preventive maintenance will reduce the likelihood of a malfunction and ensure long-term productive operation of the mechanism.

Disc mechanism

Some people manage to replace locks with a disc mechanism on their own. They are a lot like cylinder locks. the difference lies in the presence of disks in them along with the usual pins. Most often, it is enough to replace the disc lock cylinder. However, if a decision is made to change the lock itself in order to install a more modern and advanced one, it will need to be completely dismantled.

To do this, you will need to unscrew the screws with which the hammer is attached to the door leaf.

The sequence of actions is as follows:

• first, the retaining screws are unscrewed from the handle;
• then the screws are unscrewed from the lock cylinder;
• and only after that - from the castle body itself.

Reassembling the disc lock is carried out in the reverse order.

Disc lock

For disc locks, some features of such mechanisms should be taken into account. For example, when dismantling and replacing, experts recommend choosing imported versions of disc locks: they are more reliable and durable compared to Russian-made analogues. In addition, if the imported mechanism breaks down, you only need to replace its cylinder.

To increase the level of security and reliability of a disk lock in a metal entrance door, it is recommended to install additional protection on it from various mechanical damages.

The following indicators are considered to be indicators of the reliability of disc locks:

• number of disk parts;
• complexity of the grooves on the sides of the lock;
• high strength of the lock itself.

The higher the given indicators, the more reliable the disc lock can be considered.

As can be seen from the descriptions given, almost all types of locks commonly used on metal entrance doors can be dismantled and replaced independently.

The final stage is verification

After dismantling and replacing the lock on a metal entrance door, you need to check that it is working correctly. To do this, you will need to inspect the correct functioning of each latch, door handle, and crossbar structure. First, all actions are performed with the door leaf open, then with the door closed.

In some cases (mismatch between the holes and tongues of the locking mechanism), adjustments will be necessary. This may require removing the decorative strip on the door leaf and drilling new holes for the crossbars. These simple steps will allow you to fully improve the performance of the installed new lock and ensure proper operation of its mechanism, as well as the necessary durability and safety of your home.

Replacing a door lock: types of devices and their features

All locking mechanisms that are used on entrance doors are classified according to several criteria. First of all, locks are differentiated into groups depending on the installation option. On the modern market you can find the following types of devices:

• mortise;
• mounted;
• invoices.

Mortise mechanisms are the most popular. They most often contain secretions and have high protective properties. This type of lock is quite difficult to crack (compared to overhead models). Hanging devices are used on entrance doors extremely rarely.

Before you start changing the lock on an iron door, you need to determine the type of device. Thus, knowing the types of locking mechanisms is very useful. Another indicator by which locks are divided into types is their design. Depending on the characteristics of the device, the following models of locking devices are distinguished:

• cylinder;
• levelers;
• disk;
• cruciform.

Before you start changing the lock on the door, you need to determine the type of device

You can replace a cylinder-type door lock either completely or partially. This is explained by the design features of such devices. They include a core (cylinder), which contains a mechanism that opens with a key. This is what most often fails. There may be several reasons for this. Malfunctions in the operation of the core are caused by blockages, as well as all kinds of breakdowns that occur as a result of wear of its individual elements.

Lever locking mechanisms differ from cylinder locking mechanisms in their design. As for the installation option, they are mounted exclusively by one method - insertion. It is important to remember that it will be quite difficult for a beginner to understand the intricacies of installing such a device. To change the lock on a metal door, you must carefully study the relevant instructions, and it is also recommended that you familiarize yourself with video materials on this topic.

Helpful information! Some manufacturers produce lever locking mechanisms that support the recoding function. This is a serious advantage, due to which there is no need to replace the lock (for example, if the keys are lost).

Disc mechanisms are divided into two large groups: automatic and semi-automatic. Such locks include a secret lock. Thus, in the event of a breakdown, you can not completely change the locking device, but limit yourself to replacing the core. In order to know how to change the lock cylinder of the front door, you need to study the instructions corresponding to this type of locking mechanism.

On the modern lock market you can find the following types of devices: mortise, padded, overhead

And finally, cross-shaped devices also belong to cylinder mechanisms. They are quite easy to identify by the keys, which have projections on four sides. Such locks are not very popular and are quite rare.

How to change a door lock: determining the type of locking mechanism

In order to replace the locking mechanism in the front door, you must first decide on its type. This will allow you to select a similar device and study all the nuances of its installation. Currently, entrance doors are most often equipped with cylinder and lever locks, which are the best in many respects. On some canvases both types of these locking mechanisms are found. The combination of locks increases security performance.

Devices that are equipped with a cylinder are the most convenient. This is due to the fact that if they fail, they do not require a complete replacement of the housing. It is enough to simply select the appropriate size secret and install it in the body of the device.

Before you start changing the door lock, you must take appropriate measurements to avoid mistakes. In the case of lever devices, it is recommended to present the old mechanism to the seller. These locks are more reliable because they do not have a secret key, which can be easily drilled by intruders. The keys supplied with such devices can be distinguished by their appearance. They have an elongated rod that ends in ribbed protrusions designed to lift the levers.

Before you start changing the door lock, you must take appropriate measurements to avoid mistakes

Levers are metal plates that are the main structural elements of these mechanisms. It is important to remember that the reliability of the door lock depends on the number of such parts. It is almost impossible to replace levers that have failed. Therefore, if they break, it is recommended to completely dismantle the old locking device.

Helpful information! Disc and cross-shaped locks, related to cylinder mechanisms, are determined by the shape of the keys.

In addition, there is another type of lock - rack and pinion. Such models do not belong to the category of popular devices, but they are found in some door leaves. Disc mechanisms can be replaced either completely or partially. The same applies to cruciform models.

How to replace a door lock: determining the type of locking device by the shape of the key

Any locking mechanism can be identified depending on the shape of the keys that come with it. For people who do not understand this issue, this method of determining the type of lock is the simplest. Before changing the lock in your apartment, you need to know not only the type of device, but also the reason that led to its malfunction.

Any locking mechanism can be identified depending on the shape of the keys that come with it

Keys for cylindrical mechanisms are distinguished by the fact that they have a flat shape. On this plate there are recesses that correspond to the coding elements of the larva. To repair such a lock, it is enough to replace the secret.

In turn, leveling devices have a more complex structure. As mentioned above, the keys for these locking mechanisms have a long shaft with a plate at the end that has a unique combination of notches. Installing a door lock of this type is much more difficult, since in this case a complete replacement of the device is required.

Rack and pinion mechanisms have flat keys. Such elements are equipped with channels on their body, as well as recesses that correspond to the coding of the locking device. The keys for disc locks are semicircular in shape. They are short and have special notches on one side. Phillips keys are shaped like a screwdriver of the same name. In order to independently replace the lock on an iron door, you need to clearly determine the type of structure and select a mechanism with similar parameters.

Keys for cylindrical mechanisms are distinguished by the fact that they have a flat shape

Among other things, there are also deadbolt locks. They are not recommended for installation on entrance doors, as they do not meet modern security parameters. The keys to them are flat in shape and have notches on one side (less often on both).

Related article:

Door lock repair: common causes of breakdowns and how to fix them

Common causes of breakdowns. Necessary tools. Features of repair of entrance and interior locks.

Replacing the lock on the front door: necessary tools and preparation for work

Before you begin replacing the locking device, you will need to carry out the appropriate preparatory measures. First of all, you need to decide on the set of tools that will be required to carry out this type of work, the most necessary of which are:

• hammer;
• drill or screwdriver;
• chisel;
• marker;
• yardstick.

Note! In order to know exactly how to replace a door lock, you will need to study the sequence of actions and strictly follow it. In addition to preparing all the necessary tools, you also need to purchase a new locking device.

To replace the lock you will need the following tools: hammer, screwdriver, chisel, marker, measuring tape

There is not always a need to buy a new lock. In some situations, it is enough to replace one damaged element. An example is the replacement of a larva. There are parts in the door lock that often fail (for example, the return spring).

It is important to remember that the locking mechanism should be as suitable as possible for the given door leaf. The ideal option is to purchase a lock model made by the same company that manufactured the door. In this case, maximum compatibility is achieved.

Possible difficulties and problems

Installation difficulties may arise if there are differences in the size and configuration of the new and old mechanisms. Therefore, it is important to purchase a modern device with a failed locking element.

If there is no analogue in modern devices, you will need to adjust the lock opening, and you may need the help of professionals. When selecting an element, it is important to take into account the coincidence of sizes; small irregularities should be easily corrected without compromising the integrity of the door leaf. During complex work, the door may be left without a locking device for some time, so it will be necessary to protect the house.

How to change the lock: dismantling the old device

Before you start inserting a new device, it is necessary to remove the old damaged mechanism from the socket located in the canvas. There is a certain sequence of actions that is recommended to be followed in order to correctly perform dismantling. Depending on the type of device, the procedure may vary.

In order to dismantle the cylindrical locking device, you will need to become familiar with its design features. In this case, all work may be limited to replacing the door lock cylinder. In addition to the secret lock, the cylinder device includes the following parts: handle, armor plate.

In order to dismantle the cylindrical locking device, you will need to become familiar with its design features

The lever device includes plates with shaped cutouts. Dismantling the lever mechanism has some features that should not be ignored. For example, before you start changing the lock on the front door, you need to make sure that all the bolts of the mechanism are retracted. You will need to open the door and remove all handles and latches. Next, the fixing elements (screws) that are responsible for attaching the lock to the metal sheet are removed.

Note! The new lock does not have to fit the dimensions of the niche of the previous mechanism. However, if the size of the new mechanism does not match the socket, then it will need to be expanded, which will take more time and effort.

Measure the dimensions of the lock

To avoid having to adjust the seat to the body, you need to buy a lock whose dimensions are identical to the old one or as close as possible to them. Otherwise, the mechanism will not fit into the door or the holes in it will not coincide with the location of the well and other elements.

Here are the most important parameters to pay attention to:

• A is the depth of entry of the crossbars into the door frame;
• B - distance from the center of the well to the mounting strip;
• B is the width of the crossbars from top to bottom;
• Г—thickness of the mounting plate (lock);
• D - diameter of locking bolts;
• E is the height of the mounting plate.

Ideally, it is best to lock the door with a second lock or ask someone to guard the apartment, and dismantle the old mechanism yourself and take it with you to the store. This way you will select a new one with exactly the same parameters.

How to change a door lock in a metal door: cylinder type

Such a device includes a special mechanism responsible for secrecy. It is called a larva. This element is the core of the lock, and it is what is changed if the keys are lost. From the point of view of maintainability, models of this type are the most attractive. In order to repair a cylindrical device, it is not necessary to have special knowledge and skills.

The repair work in this case is divided into a number of stages. The first thing to do is to remove the old spoiled larva. Next you will need to open the locking mechanism. To do this, use keys that match the configuration of the lock. The open mechanism remains in the locking device.

After removing the old mechanism, you can begin replacing the front door lock cylinder

At the next stage of replacing the lock of the entrance metal door, the fasteners (screws) securing the end plate are removed. Then you need to open the lock with the key. After this, you should release the lock tongue, which is also secured with a screw.

After carrying out all the above manipulations, the larva is released, which allows its extraction. In order to pull out the cylinder, you need to turn the key approximately 40 degrees.

After removing the old mechanism, you can begin replacing the front door lock cylinder. You will need to insert a key into the new secret. It must be turned to level out the interference from the flag when installing the core. Using a fixing bolt, the new cylindrical mechanism is secured.

Then you will need to secure the armor plate, which was dismantled when removing the old secret. Screws are used to secure this plate. After replacing the cylinder, it is necessary to check how correctly the new mechanism functions.

Devices that are equipped with a cylinder are the most convenient to replace

Pictures that show the various stages of the work help answer the question of how to change the lock on a metal front door. It is worth noting that in some cases it is impossible to remove the old secret using the standard method. An example is a mechanism destroyed due to an impact. In such a situation, you will need to resort to drilling the core.

When is it time to change the lock?

• First of all, the lock is faulty, the key is stuck or it is turning. Sooner or later the mechanism will refuse to work, usually this happens at the most inopportune moment.
• Lost or stolen keys.
• Attempts to break into the premises.
• Moving into a new apartment or house.
• Rental of property. If the apartment is rented, the locks also need to be changed after the tenants move out.
• Sometimes an old lock that has been used for a long time is replaced with a more modern and reliable one, the degree of secrecy of which is higher.

How to change a door lock: lever mechanism

The locking device belonging to this group is characterized by structural complexity. This type of lock is the most difficult to replace on your own. Experts recommend purchasing European-type leveling devices. This is due to the fact that they are characterized by increased maintainability. When a European model fails, it is often enough to replace the core of the device.

Helpful information! Lever locks made by domestic manufacturers cannot be recoded. Thus, if this device breaks down, it will need to be completely replaced.

How to remove this type of door lock? First of all, you need to open the door leaf. This is required so that the lock bolt can be opened completely. It is important to remember that the locking mechanism housing in this case should be removed in advance.

Replacing a door lock with a lever mechanism on your own is the most difficult thing to do.

At the next stage, you will need to remove the keys and dismantle a number of elements that prevent free access to the core of the system. It is necessary to remove the handle, the armor plate, and the bolt. Decorative parts that are included in most locking devices do not need to be removed.

How to change the lock on the front door? After dismantling all the auxiliary elements, you can proceed directly to replacing the locking mechanism. To do this, you need to unscrew all the fixing parts (screws). Next, the old equipment is removed and a new device is installed.

If a European model of a locking device fails, it is best to contact a specialist who can recode the device. Independent intervention in the structure of such a mechanism is not recommended.

Types of lock systems

Common types of locks in Russia are level and cylinder. Often, both are installed for reliability and protection against burglary. The most modern and expensive locking systems are electronic and biometric. To open doors with such locks, instead of a key, a magnetic card is used, a secret code is entered, or a finger is placed on the device to identify the owner.

According to the installation method, locks are divided into mortise and overhead. Mortise ones can be replaced independently; they have a visible end strip from which the crossbars extend. Overhead locks are invisible to the eye from the front side; they are literally integrated into the structure of the door leaf. Only a specialist can change such a lock.

There are four classes of burglary resistance of lock systems. The higher the class, the more reliable the mechanism.

How to replace a deadbolt lock: algorithm of actions

To replace a deadbolt device that has failed, it is necessary to study the structure of the product. A lock of this type may have several stops located both below and above. Models with stops on the side are also now common. The presence of these elements significantly complicates the work of replacing the locking mechanism. For ease of dismantling, it is recommended to remove the canvas from the hinges.

Replacing a lock on an iron door is labor-intensive and takes some time

Let's consider the procedure for changing the lock on an iron door in this situation. First of all, it is necessary to lay the canvas, which has been removed from its hinges, on the floor or any other horizontal surface. Next you need to disassemble the door. This is done in order to provide access to the mechanisms located inside the canvas.

How to change a deadbolt door lock? First you will need to loosen the rods of the crossbar elements. Next, you need to disconnect these parts from the locking mechanism. Replacing crossbar elements yourself is a complex procedure, so it is recommended to use the services of specialists.

Note! Chinese models of entrance doors are almost impossible to disassemble on your own. In this case, the best solution is to contact a qualified specialist with experience in such work.

It is important to remember that when dismantling a broken mechanism, you must be careful. This is due to the fact that even the slightest deformation of the rod will render the system unusable.

A deadbolt-type lock can have several stops located both below and above

How to change the front door lock: installing a new cylinder

A locking mechanism that has failed can be replaced in whole or in part. The second option is suitable for cylindrical lock models and involves replacing the core (cylinder). The secret contains a special coding mechanism that recognizes the unique shape of a particular key.

In order to replace the cylinder in a metal door, you need to prepare a screwdriver. As a rule, this tool is enough to complete such an undertaking.

The first thing to do is to unscrew the fixing elements that secure the plate to the end of the sash. If the mechanism includes door handles, then you first need to dismantle them. Next, the external armor plates are removed. After this, it becomes possible to extract the core.

How to change the lock cylinder? First of all, you need to unscrew the screw that is responsible for fixing the secret inside the mechanism. This element is not difficult to detect. It is located on the end surface of the door leaf. Then you need to insert the key into the keyhole and turn it 15-20 degrees. This action will loosen and release the liner. It should be understood that turning the key changes the position of the rotary cam.

In order to replace the cylinder in a metal door, one screwdriver is enough

The dimensions of the new lock must fully correspond to the size of the old mechanism. In order to secure the larva in the nest, the same fixing screw is used. Replacing the lock cylinder in a metal door is carried out in several stages described above. After installing the new mechanism, the lock is assembled. The previously removed handle, as well as the armor plate, are mounted on the door.

At the final stage, it is necessary to check the operation of the new larva. If the rotary tongue rotates without any difficulty, then the installation was carried out correctly.

Cylinder replacement

A simple operation, since the cylinder is fixed in the lock body with a single screw accessible from the end of the blade. It is enough to unscrew this screw and the cylinder can be freely removed towards the room. The outer protector usually does not need to be removed, but if the cylinder has built-in knockout protection (as most modern models do), you will need to insert the key and turn it about a quarter turn clockwise.

KABA

The profile of the cylinder does not depend on the number of code elements, so a simple device can be replaced with a highly secret one, with pins located in different planes.

KABA

A highly secret device with pins located in different planes.

There will also be no difficulties with purchasing a new privacy mechanism. Cylinders are universal, or rather, there are two main types of devices, or profiles, on sale - European (they are the most common) and Finnish (they have a cylindrical shape and are used in Abloy locks). In order not to make a mistake with the choice, it is necessary to determine the type of cylinder, and also measure its length and the distance from the hole for the mounting screw to each of the ends. If you would like to increase the security of the lock, you should give preference to new models with an interactive pin or pins located in different planes.

Replacing a lock on an iron door: general recommendations and algorithm of actions

The locking device located in the metal sheet can be replaced independently. To do this, you will need to study the procedure and prepare the appropriate tools, without which it will not be possible to dismantle the old lock and insert a new device.

Let's consider the sequence of installing a door lock on a metal entrance door. First you need to prepare a hexagon. Using this tool, the fixing elements are removed, which allows you to remove the outer and inner handles. Next, you should dismantle the armored lining. To do this, you will need to unscrew the fastening element, which is located on the inside.

Chinese models of entrance doors are almost impossible to disassemble on your own

The next step is to remove the old cylindrical element. To do this, you need to rotate the fixing element located at the end of the door leaf. Then you need to rotate the cylindrical mechanism, which will allow you to remove it.

Note! To understand how to change the lock on a door, it is recommended to study video materials on this topic.

Then you will need to remove the remaining fasteners located on the end side of the door leaf. Next, remove the end plate. The old cylinder is removed from the socket, and the crossbars located in the vertical plane are disconnected. It is worth noting that this event is labor-intensive and requires some time. Any person who does not have special knowledge in this area can change the lock cylinder on an iron door.

To complete the work, you will need to install a new mechanism in the socket. Next, the parts that were dismantled earlier are assembled. It is recommended to pay special attention to the installation of rods.

In case of independent replacement of the locking device, which is located on the front door, it is necessary to determine the nature of the breakdown

Useful tips

1. The new lock cylinder must correspond to the dimensions of the previous version. In addition, you should pay attention to its color. It should blend into the door and be invisible. The larva model is set according to personal preference. It can have two key holes or be closed with a latch from the inside.
2. Some cylinder cylinders may be subject to repair. This applies to collapsible types. First of all, you should find the plate fixed between the two paws. If you bend it, you can get acquainted with the problem and fix it. The work is quite painstaking and requires special attention. If everything is assembled incorrectly, the key simply will not fit. After all manipulations, the lock is lubricated with graphite. Liquid oils are not used, as they promote the adhesion of dirt and dust, as a result of which the lock stops opening.
3. You should not skimp on purchasing larvae. Cheap designs are easy to hack, as they are made of soft materials and do not have durable linings. It is better to give preference to larvae from the proven ones, “Apex”, “Kale”, “Ariko” and others.