Replacing the drain pump (pump) on all models of washing machines - How to replace the drain pump in a washing machine

The principle of operation of the pump, its application and location

During operation of the washing machine, water is supplied inside the device under pressure, that is, the intake occurs automatically as soon as the necessary programs are selected and the “START” button is pressed. The process then proceeds according to the following scenario:

• the solenoid valve is brought to the open position;
• a pressure switch (sensor for monitoring the liquid level in the tank) measures the required volume of water;
• the path of the liquid runs through the compartments where the necessary detergents (washing powder) are located, water mixes with them, and thus enters the tank in dissolved form;
• the liquid under pressure enters in the required volume into the chamber where the laundry is stored.

During the process and completion of the wash, the water pump comes into play. It is he who drains and pumps out dirty waste liquid after washing or excess water after rinsing. The pump is involved in almost all washing modes!

As soon as a signal from the electronic module is sent to the pump, waste water will begin to be pumped into the sewer due to the impeller of the device. The fluid path is as follows:

• Water enters through a rubber pipe, which is connected to the tank and volute using special clamps
• Next, the liquid enters the pump through a special filter located in the volute; it protects the pump impeller from debris, to avoid jamming of the impeller.
• Next, the liquid comes out through the drain hose, which is connected to the volute. The dirty liquid phase is pumped out until the waste liquid is completely pumped out of the washing machine tank.

During washing, the water is already in the lower part of the unit, which is why the end of the drain hose must be secured above the drain pump, since if this is not observed, the water will begin to drain from the machine by gravity. The drain hose must be installed at least 80 cm along its entire length!

The electric drain pump is located at the bottom of the unit under the tank. It is attached to a plastic volute, usually with three screws, and the volute, in turn, is attached to the body of the unit from the front side. This arrangement is convenient for quick access to it, if, for example, you need to clean it of debris or drain liquid from the system.

There are two types of pumps used in washing machines:

• The circulation type of pump is used in conjunction with a conventional pump; they are used in new models of premium class machines such as Indesit, Ariston, etc. This option supplies water directly to the washing area and circulates throughout the system, which improves washing efficiency.

• machines from a more budget type or not of a new generation, such as the Daewoo bubble machine (Daewoo), are equipped with a simple pump, for example from Askoll, which simply drains the waste liquid into the sewer.

Repair of the drain pump of a washing machine, as a rule, is not carried out; most likely, spare parts in such devices will have to be replaced. That is, you will have to completely replace the broken pump with a new one.

ATTENTION! You can also inspect the device yourself for blockages or pump failure. But when inspecting the internal mechanism, you must first disconnect the equipment from electricity. Using a special device, such as a multi-mmmeter, check the contacts going to the pump and make sure there is no voltage, and only then continue working. All these precautions are necessary because the work is carried out near an open source of water.

Types of washing machine pumps

Washing machines use more than fifty types of pumps, each with one or another design difference.

All of them are divided into two types:

• Circulating. Provide water movement in the machine. Installed on expensive devices, for example, Bosch, Siemens and Hansa.
• Drain. Pump out the water after each washing stage and after rinsing.

Many popular models use a single pump that performs pumping and draining functions. Pumps for pumping/circulating/draining water are made on an electromagnetic basis. In addition to them, washer-dryers also have pumps made in the form of a small engine with an impeller (fan).

The design of the pump is quite simple, consisting of a stator, rotor and impeller. The rotor rotates in one direction or the other, so when the impeller is blocked by foreign objects, it jerks in different directions. The most reliable are synchronous pumps with a magnetic rotor, characterized by high power and miniature dimensions.

The pump is considered one of the most important elements of the washing mechanism. Its type may vary depending on the manufacturer’s brand and design features

Structurally, the drain pump or pump, as it is also called, is a unit consisting of two units. One of them is a motor with an impeller, the second is a plastic pipe called a volute. On one side of the pipe there is a seat for the engine, on the other there is a recess for the filter cover. When used correctly, the volute, unlike a motor with an impeller, is almost resistant to wear.

In older models, the pump has two impellers: one of them is used to cool the engine, the second is used to circulate water. A special feature of these devices is the oil seal, which prevents water from flowing from the snail into the motor. Modern machines have one impeller and no seals, since the electrical and mechanical parts are separated.

The average lifespan of a pump is 3-7 years, but the problem can arise even earlier. This happens when a household appliance is used incorrectly, when various small objects get into it. They stop the impeller, which leads to pump failure

Particularly costly will be repairs after the electronic control module burns out due to a short circuit in the winding. Pump breakdown is a standard situation that occurs during a long service life of the unit and intensive frequency of operation of the device.

The main causes of drain pump failure

When repairing washing machines, our specialists note many causes and types of pump failure. The pump motor coil is burnt out. The electric motor itself consists of an electrical part and a mechanical part. The motor can burn out due to overload or moisture getting into it. Impeller. This is the main part of the drain motor. It is she who pushes the water out of the machine. Damage to the impeller occurs from the ingress of foreign objects; it can crack or completely break from the rod on which it rests. The shaft on which the impeller rests. The so-called rod - the main shaft of the pump constantly rotates and due to natural wear and tear it reaches its service life. long-term use leads to this breakdown. Foreign objects . Large debris entering the drain system gets stuck in the pump volute, thereby blocking its rotation. The pump burns out due to overheating. Before loading laundry, carefully check for small debris from coin toothpicks, which can damage the motor.

Drain pump device

The drain pump for a washing machine has the following technical characteristics:

• power consumption - usually from 25 to 40 W;
• type of fastening to the volute - screw or fastening with latches;
• contact arrangement - paired or separate;

ATTENTION! When choosing a new pump, be sure to pay attention to the type and technical characteristics of the old pump, since the new one may not be suitable for some of the above parameters.

The pump in the washing machine differs not only in appearance, but also in the type of “snail” filter installed inside them. Very often the filter becomes clogged, and in this case the water is not completely drained from the chamber, then the dirty liquid stagnates and an unpleasant odor appears inside the drainage system. In this case, it is necessary to check the condition of the filter. You will need some tools, since the device cannot be removed with bare hands. The filter can be cleaned and the problem may be resolved.

The internal structure looks something like this:

The pump rotor is a permanent magnet in the form of a cylinder, which is located in a plastic casing. When the system starts up, the rotor first turns on, then the impeller, located on the shaft at an angle of 180 degrees, begins to move. The impeller relative to the armature should have a small stroke; this is necessary for normal engine starting, since there is a load due to water.

The rod, or otherwise the magnetic core, has two insulating windings that are connected to each other. The whole design is similar to an asynchronous motor, where there is also a moving and a stationary part. The moving part is a rotor in the form of a cylinder, and the stationary part is a magnetic core with windings.

This is how a simple washing machine pump works.

For example, if the impeller of the impeller falls off from the pump, this will inevitably lead to the need to replace the pump, since it cannot be repaired.

The washing machine's circular pump only allows liquid to flow in one direction.

For example, in the pump of a Samsung washing machine, a sealing collar is used to block the independent entry of liquid. This is necessary to prevent water from leaking into the bearing. Also, such mechanisms are equipped with a rotor shaft, which passes through a central collar bushing, which is crimped in the form of a spring ring.

Before the cuff is secured in the desired bushing, it must be lubricated with a special technical lubricant. The product is applied in a thick layer so that when starting work it gets into all the necessary gaps. This action has a positive effect on the operation of the mechanism and significantly increases its service life.

DIY drain pump repair

Repairs are carried out in parallel with checking the functioning of the main parts.

Sequencing:

1. Determine whether there is excessive noise when the pump is operating.
2. Find out if the filter and drain hose are clogged. The first one can be easily cleaned by hand if necessary. To clean the hose, remove it and place it under water so that the stream passes through it.
3. Run the machine in rinse mode to check the operation of the pump. It is considered to be in good condition if water flows inside the tank at the required speed and an increased noise level is not generated during operation of the washing machine. If failures occur, proceed to the next step.
4. Check that the impeller rotates correctly. To access it, you need to unscrew and remove the filter. The blades are rotated by hand to see how smoothly they rotate. If foreign objects or contamination are found, they must be removed.

Read more ► There is an unpleasant smell in the washing machine: what to do, how and with what to remove it?

If the problem is not solved after taking the above measures, the washing machine is taken to a service center or to a private technician - most likely, the electronics of the unit have failed.

Possible causes of pump malfunctions

Problems with LG washing machine pumps must be corrected. To do this correctly and not harm household appliances, it is very important to identify the true cause of the problem.

In most cases, the following facts lead to pump malfunctions:

1. Breakdown is often caused by a serious blockage in the drainage system of the machine. This process involves the pipe, the filter and the pump itself.
2. Breakdowns also occur due to severe blockage of the sewer system.
3. If there are defects in electrical contacts and important connections.

Before you rush to replace the washing machine pump yourself, you should rule out other equipment problems that may occur.

How and what to replace

If the problems are more serious and regular cleaning of contaminated parts cannot be avoided, then you will have to resort to replacing the washing machine pump. It is not at all necessary to completely disassemble the equipment for this. In the case of LG machines, all stages of work can be carried out through the bottom.

The algorithm of actions will be as follows.

1. Drain all the water from the tank, remember to turn off the water supply.
2. To make the replacement process more convenient, it is better to place the device on its side so that the drain pump is on top. If you don’t want to stain the floor finish, then you should spread something like an old and unnecessary sheet under the machine.
3. Next you will need to remove the bottom panel. You can do this with literally a single click. If the machine is an old model, where the panel needs to be unscrewed, then you will need to disassemble this part very carefully.
4. Unscrew the pump from the base. It is usually attached to screws located on the outside, near the drain valve.
5. Pressing the machine pump from the side of the drain valve, pull it towards you.
6. Disconnect all wires from the pump.
7. It is imperative that you drain all remaining water from the pump, if there is still any there. Take any container for this. Slightly loosen the clamps holding the drain pipe.
8. After you remove the nipple and drain hose, get rid of any remaining fluid.
9. If the “snail” is in good condition, there is no point in spending money on a new one. You will need to insert the old part, but with a brand new pump.
10. To remove the snail, you will need to unscrew the bolts that secure it, and then unscrew the screws connecting the snail and the pump.
11. Do not rush to attach the new pump to the cochlea. First, the latter must be thoroughly cleaned of dirt and accumulated mucus. Pay special attention to the area where the new pump will “sit”. It should be clean there too.
12. Attach the cleaned “snail” to the new pump, but in the reverse order. The next step is to connect the pipes. Don't forget about connecting the wires.

Step-by-step instructions for replacing the pump

We disassemble the washing machine. To change the drain pump in different configurations of Indesit, Ariston, Samsung, Bosch, Siemens washing machines, you only need to partially disassemble the body. For example, in front-loading models, it is enough to remove the back wall, or you can put the machine on its side and change the pump through the bottom. In some models, to get to the pump it is necessary to almost completely disassemble the washing machine body. At the same time, it is very necessary to take the procedure of disassembling and assembling the machine seriously. Models with vertical loading from above are a little easier to change the pump compared to horizontal loading machines Electrolux, Zanussi, Candy. To do this, just unscrew the side wall. Disconnect the pump. When you have gained access to the pump, the first step is to disconnect the power wires. You must also disconnect the pump from the volute to which it is attached. It should be noted that the pump is attached to the cochlea in two ways: 1) using screws 2) using latches. In some cases, in order to disconnect the pump, you will have to dismantle the volute along with it. To disconnect the snail, you need to unscrew one or two bolts (usually with the help of them it is attached to the body of the machine), then you need to disconnect the pipe from the tank on one side and the drain hose on the other side of the snail and take it out. Only then can you gain access to the pump and disconnect the drain volute with the filter and the motor itself. The next step is installing a new part. Assembly occurs in the reverse order: attach the pump to the drain volute, then attach the pipes and hose and connect the wires. Let's diagnose . After the new part is installed, pour water into the machine and check its functionality using the water drain program. If everything works, we assemble the machine: fasten the walls and install the washing machine in place.

What you need

To repair an LG washing machine yourself, you will need to prepare all the necessary tools. You will also need spare parts for the device.

Tools

To carry out all the necessary work you will need the following devices:

• screwdriver;
• tool with a blunt blade;
• penknife;
• multimeter;
• pliers.

Spare parts

Repairing a branded washing machine in the event of a pump breakdown must be carried out armed with a number of spare parts. In this case, the following units will be needed:

• new drain pump;
• impeller;
• axis;
• contacts;
• pump sensor;
• cuff;
• special rubber gasket;
• closet.

When selecting the necessary replacement elements, you need to take into account that they must be ideal for the LG washing machine.

Ideally, you will need to remove the old drain and contact the store salesperson for help. The store employee should help you find suitable analogues. You can also navigate the selection of spare parts by finding out the serial numbers of the parts. They must be applied to all components of the pump located in the washing machine.

Is it difficult to change a part?

You can replace the pump of a Samsung washing machine yourself

It is important to select a replacement element that fully matches the standard one. When the original cannot be found, it is allowed to install an analogue

When choosing a pump, you need to focus on the following characteristics:

• power;
• snail fastening method;
• number of latches or mounting holes for bolts;
• connection method (chip or terminals).

The pump replacement algorithm is as follows:

• disconnect the two power wires going to the pump by removing the terminals;
• unscrew the bolts securing the pump to the volute;
• remove the pump from the housing;
• connect the new pump to its original place in the same position, secure it with self-tapping screws;
• connect terminals, wiring;
• place the SMA in its original position;
• Screw in the garbage filter and close the protective hatch.

Afterwards, you can connect the machine to communications, plug it in and start a test wash. Thus, it is possible to diagnose and replace the drain pump at home, without calling a technician

It is important to strictly follow the rules and instructions for action

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Repair stages

Often the pumps in the design of LG washing machines stop working properly due to simple contamination. You should not immediately run to the store for a new pump, because there is a possibility that the old part just needs to be cleaned. For these types of repairs, the DIYer will need a spare container, a rag, and a brush.

Work order.

1. Start the drum rotation mode of the machine. A couple of minutes will be enough to successfully drain all the water from the device.
2. Be sure to unplug the machine from the electrical outlet. Open the cover at the back. Find where the special drainage hose is located and pull it towards you.
3. Hold the hose over the prepared empty container. Drain all remaining liquid there.
4. With extreme care, turn the fitting in a counterclockwise direction. Remove the drain filter.
5. Using a brush, very carefully and carefully clean both the inner and outer surfaces of the filter part. At the end of your actions, do not forget to rinse this element under water.
6. After completing all of the above steps, install the filter in its original position. Next, fix the hose in reverse order and reinsert it into the machine. Close the unit cover.

Dismantling the unit

The liquid pumping unit is built between the drain channel from the tank and the volute - the socket into which the filter is screwed. In LG, as in washing machines of other brands, the pump is located at the bottom of the case. It consists of an impeller enclosed in a casing and a motor. To get to the pump unit, you need to perform the following steps:

1. Disconnect the machine from electricity, water, and sewerage.
2. Drain the contaminated liquid from the tank through the emergency hose or filter socket.
3. Move the device, lay it on its left side: through the open bottom of the case, an overview of the pump and associated parts will open.
4. Unscrew 2-3 mounting screws, loosen both clamps, remove the pipes. Disconnect the wires and remove the pump.

All of the above work can be done with your own hands. In more complex models with a drum for 8 kg of dry laundry, the bottom of the machine body is closed, there are additional shock absorbers and sensors. It is better to entrust such devices to specialists - they will be able to repair SMA with a guarantee for up to one year.

How to disassemble the pump

The reasons for pump repair can be a series of events: wear of the oil seal - subsidence of the bushing and shaft - axial play of the impeller - hooking of the housing - shearing of the pin. As a result, the turntable rotates freely on the drive shaft from the motor. Electric pump disassembly sequence:

1. To remove the snail, turn the lid counterclockwise. If the mount is bolted, unscrew the screws.
2. Pry the case latches and disconnect it.
3. Release the magnet with the impeller and remove any accumulated dirt.
4. Lubricate the bearings (there are 2 of them) or replace them with new ones if they are damaged.

If the problem turns out to be a broken gasket, install a new one. Depending on the condition of the impeller, further repair actions will be determined.

After the picture becomes clear with the mechanical part, we move on to the electrical half of the pump. Inspect the integrity of the coils: whether there is any burning on them from breakdown, breakage of copper wires. If defects are found in the electrical system, the entire pump is replaced.

Repair

There are LG models equipped with a non-separable type pump. For an untrained person, trying to fix a pump of this design is just a waste of time. Approximately the same situation arises when, after opening the pumping device, it turns out that the impeller is partially destroyed.

It will not be possible to restore the part at home. It is not advisable to buy separately: there are many types of electric pumps, the price is low. It makes direct sense not to restore a worn-out pump, but to replace it with a new one.

How to choose a new pump

When going to the store to buy the required pump, it is useful to know about the method of connecting the plastic pipe (volute) to the drain filter: for LG, Zanussi models - with 8 latches.

You can also order the part from the device manufacturer. In order not to make a mistake with your choice, you need to be careful and know the information about the item you are purchasing:

• the best way is to show the seller the old hydraulic pump;
• rewrite the serial number of the part and model of the SMA;
• pay attention to how the wires are connected, where the contact group is located (front or rear).

The pump power is indicated on the label; it is approximately the same for different models and does not have a decisive influence on the choice. Advice from a knowledgeable specialist when purchasing will be useful.

Installation

Before installing a new pump, you need to clean all parts of the drain assembly: pipes, volute, socket and the filter itself. After preparing the system elements and seats, they proceed to installation work. Assembly order:

1. Attach the hydraulic pump to the volute.
2. Install and secure the pipes and pump.
3. Connect the wires to the motor terminals.
4. Return the machine to an upright position.
5. The SMA repair has been completed. All that remains is to connect the device to water and sewerage, insert the cord plug into the socket, and do a test run.

How to clean the pump

The pump cleaning operation consists of the fact that you will need to very carefully clean one component of the pump - the impeller. To fully clean the impeller, it will also need to be removed.

The process of removing the impeller is simple: using a screwdriver, you need to remove the screws that connect the 2 parts of the pump. When these parts are separated, you will see a small head. This will be the impeller. During operation of the unit, this head rotates, due to which water is drained.

Clean it of dirt, wool fibers, hair, threads and other debris and wipe the inner snail of the element. At the end of the event, assemble the pump, install it in place, also assemble and properly secure the other removed elements. When the device is finally assembled, perform a test wash. If water is filled and drained in accordance with the norm, and no knocks or noises are heard when the device is operating, then you have done everything correctly.

Don't forget about the filter. Not every time the pump is the cause of a water drainage failure. The machine may refuse to drain water due to a clogged drain filter.

You can clean the washing machine pump filter while dismantling the pump, since when you get to this element, you will still be removing the filter plug. Simply immediately remove all debris and foreign objects from it, and then remove the pump itself.

Symptoms that require pump replacement

How to understand that the pump has failed. This can be determined during diagnosis. Did this particular part break, or did secondary factors erroneously indicate that it broke. This can only be done by disassembling the machine. But based on some minor factors, without disassembling the device, Service-Master specialists can determine from indirect symptoms what happened to the machine. So here are the main signs

• Doesn't drain water. The program stops, the water does not drain and the spin cycle fails. This is the first sign in which in 95% of cases the pump is to blame.
• Extraneous crackling noises during the water drain program . These signs indicate that a small object has entered the drain system. A button or paper clip hits the impeller of the motor during operation. Also, the cause of noise, when the machine begins to crackle while draining water, may be a mechanical failure: when the drain pump rod breaks the seat and the impeller knocks on the volute during rotation.
• Drains and stops or drains jerkily. With such signs, when the machine either drains or does not drain water, it may indicate that the drain pump has already begun to fail and it is time to change it. All these problems with draining water can be confirmed not only by our guesses or diagnostics by the technician, but also by the machine itself. If your model has a display, then, as a rule, an error code is displayed on it confirming that the drain pump needs to be either cleaned or replaced.

Prevention of breakdowns

To avoid having to frequently repair an LG washing machine with your own hands, you should take preventive measures. Let's get to know them.

• Always inspect your laundry very carefully after washing. Try to ensure that small parts do not penetrate into the drum of the machine - they can cause subsequent breakdowns and malfunctions.
• You should not send overly dirty items to the wash. It is advisable to soak them in advance, and only after that use the washing machine.
• Items that are likely to cause serious blockage in household appliances (with long threads, pellets or bulky pile) must be washed exclusively in special bags, sold in many stores.
• A washing machine made by LG must be treated with the utmost care and precision, as is the case with other equipment. In this way, you can easily and simply avoid many problems with such a useful and necessary unit.

How to extend the life of the pump

Advice from household appliance service technicians will help you extend the operating time of your washing machine, reduce the likelihood of breakdowns, and save on repairs. Many recommendations overlap with the requirements of the SMA operating instructions. Trouble-free operation of the device is facilitated by the following actions:

• Before washing, empty clothing pockets of small objects, pre-clean fabrics from dried dirt and pet hair;
• use laundry bags for items with beads, appliqués, and other decorations;
• pay attention and respond in a timely manner to leaks and extraneous sounds when the machine is operating.

The cause of failure is also increased vibrations of the case - the wires powering the pump can fray. Therefore, you must initially install the unit in accordance with the standards. Sometimes the SMA control unit fails.

If trouble does occur, you should not use parts purchased from random sellers or used parts. Such repairs will not last long; they will lead to even greater damage.

What determines the cost of repairs?

When calculating the cost of services for replacing the drain pump, we take into account:

• Car model;
• Pump type;
• Scale of work.

The average cost of services is from 700 rubles. To find out the price in advance, please contact us with details.

The cost of replacing the pump

Useful tips and tricks

If you decide to repair your LG washing machine yourself due to problems with the pump, then you should take on board some useful tips.

• Additional parts for repairing the machine can be ordered from the online store, but in this case you must check them with the serial numbers of all components, both the pump and the LG model itself.

• If you are a beginner master and have not encountered such work before, it is better to record all stages of your actions in a photo. This way you can get a kind of visual instruction with which you can avoid many mistakes.

• In order to easily disassemble the washing machine, carry out high-quality repairs or replace the necessary parts, it is important to follow all the necessary stages of work. None of the actions should be neglected.

• LG washing machines are of excellent quality, but they are technically complex devices, so repairing them often turns out to be just as difficult. If you doubt your own abilities or are afraid of damaging household appliances, then it is better to entrust its repair to specialists with the appropriate knowledge and experience. This way you will protect yourself from making serious mistakes and shortcomings.

Expert advice

Professional technicians who service machines know several causes of breakdowns that do not lie on the surface, but affect the performance of the pump:

1. Particularly “bouncy” machines can fray the power supply wires of the pump during washing. Then the pump will appear to be in good working order, but will not work and spin. To diagnose this problem, you will need to disassemble the device down to the electronic control unit. This repair is quite labor intensive. Only a master can handle it; a beginner cannot repair it.
2. In some cases, the electronic control unit program may fail. Such diagnostics and repairs can only be performed by a professional technician with special equipment.
3. Another rare malfunction is a blockage in the hose running from the main tank to the volute with the pump. It can be determined by hand, squeezing different areas in turn. If necessary, the hose can be removed and cleaned under strong pressure from the tap.

Most often, technicians check the contact group and the pump impeller. If the cause of the breakdown does not concern these parts, the specialist simply replaces the entire assembly.

You can repair the washing machine pump yourself. This is a simple operation, especially if you have an assistant

When working, you need to take precautions, do not forget about the remaining water in the tank and do not try to repair or solder the pump, unless it concerns the impeller or contact group

Washing machines have long become indispensable in everyday life. For smooth operation, you need to install it correctly. Well, if a breakdown occurs, read our articles on how to repair or replace a drum, pump, drain and pressure switch, bearings, heating element, tank.