DIY water pump repair

In detail: do-it-yourself water pump repair from a real master for the site my.housecope.com.

Modern features of power grids, as well as water supply networks, violation of operating rules, negative environmental factors lead to premature failure of water pumping equipment. Having found defects and malfunctions in the operation of the unit, it is not necessary to make a radical replacement. In some situations, it is possible to repair pumps at home.

If the breakdown is not serious, it is quite possible to repair it yourself, otherwise it is better to contact the nearest service center.

When using hydraulic equipment, prompt and timely detection of units and parts that need repair is of great importance. Diagnostics is an effective and simple method for identifying such parts without dismantling. It allows, by indirect parameters, to determine the operability of the elements of the pumps for water. These indirect parameters of hydraulic structures are considered, for example, the frequency spectrum of vibration or noise of the hydraulic system during operation.

Vibration pump device

The performance of the devices is assessed by the failure of several or one main operating parameter to be out of tolerance. For pumping equipment, such parameters are pressure pulsation and performance, for servo spools - flow in the neutral position of the oil, for reversible spools - leaks, for safety valves - minimum flow. The following components are most susceptible to aging and wear:

spools, plungers;
seals;
movable mates;
springs when the number of operating cycles is exceeded.

Video (click to play).

Common causes of water pump failure include:

pressure surges in the hydraulic system;
contaminated water with a solids content exceeding the established limit;
incorrect selection of materials for rubbing pairs;
contact fatigue;
uneven thermal expansion of materials;
erosion and cavitation wear;
hydraulic entrapment;
making mistakes when installing the unit;
work in modes other than the regulated ones (operation in "dry" mode);
improper fastening of the cable connection;
damage to bearings;
air ingress into the flow path;
impeller blocking, shaft oxidation and others.

Some breakdowns occur as a result of malfunctions in the pressure switch, engine, lack of a filter. An increase in heat generation in the hydraulic system often leads to an accident as a result of jamming of moving parts. Stabilization of the temperature of the pumped medium increases the durability of the pumps, reliability, and extends the overhaul cycle.

Most often, the owners of water equipment complain about the following malfunctions:

The power cord is damaged.
The water pressure has dropped, does not match the pump power.
The water supply has stopped.
When starting the electric pump "knocks out" the electrician.
High pressure pump motor does not start.
The pumping equipment switches itself off.
There was a hum, strong vibrations.
Overheating of the device.
Leakage of liquid inside the device.
There are problems with the control system.

Do-it-yourself repair of household models intended for the water supply system is carried out when it is possible to replace a broken part and the necessary spare parts are available, when it is easy to perform technical procedures, for example, to clean the unit. Pump repair always begins with disassembling the casing. The next step is diagnostics, which allows you to find a faulty part and select an identical one.

Available actions are: replacing the condenser, float, impeller, repairing the electrical cable, removing suspended particles that have entered with water, fixing the shock absorber.

First, a number of pre-repair measures common to all types of water pumps should be carried out:

Pull out the pump carefully. Carefully examine and study the constituent elements of the equipment.
Check the presence / absence of damage to the case, whether there is dirt or corrosion centers.
If the pump starts, listen to its operation, the detected side sound may indicate a defect. Extraneous noise indicates mechanical failure.
Turning off the machine and the pumping system as a whole often indicates a banal overload. Therefore, it is necessary to disassemble the junction box and make a visual inspection of the inside. A part that has overheated is visible to the naked eye, and a burning smell is also noticeable.
If the cause of the failure by this stage is not clear, the impeller is removed from the pump motor in order to check in which state the motor itself rotates - free or not. An attempt is made to manually scroll the structure shaft. If it does not rotate, it is probably a motor jam.

Do not forget about the position: before disassembling, the upper part of the electric motor must be vertical. Failure to do so will inevitably lead to oil leakage, which is the working fluid of the pumps. After installation, the cover is removed through which the power cables pass. After, using an ohmmeter, the starting capacitor is diagnosed.

Circulation pump device

An ohmmeter allows you to check the resistance of the working and starting windings. For this purpose, the terminals of the measuring device are connected to the winding, the handle rotates. You should not worry about the state of the winding if the ohmmeter shows resistance that does not reach infinity. Otherwise, the problem lies in the loss of the motor phase. Too little resistance is a "messenger" of turn-to-turn closure. In all of the above problems, the repair of the water pump should be carried out by a specialist.
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A pump for increasing water pressure has its own characteristic defects: holes in the cover, housing, and suction nozzle, cracks, wear of the shaft, bearings, wear of the wheel blades, corrosion damage. Cracks and fistulas in the pump cover and casing are eliminated by welding them, or by replacing parts with new ones. Shaft journals for bearings are restored by chrome plating or chrome plating. In this case, the liner bushings (sleeve bearings) are exclusively replaced.

If minor corrosion damage is found, deburring is required. The same is done in the case of erosive wear of the wheel blades. If the pump for increasing the water pressure has deep sinks, they are welded. The impeller fit is restored by building up a seat on the shaft using an electrolytic method or an elastomer.

At the end of the repair of the wheel and shaft, they are assembled and statistically balanced, the runout of the shaft journals (the norm is 0.02 mm), the end and radial runout of the wheel (0.04 mm) are checked. At the time of assembly of the pumping equipment, gaskets intended for sealing and stuffing box packing are replaced in the section of the cover and body connector. Then you need to adjust the gap between the wheel and the body from 2 sides (permissible value is 0.07 mm). Finally, check the rotation of the pump rotors, which should be without jamming. When aligning with an electric motor, do not forget to comply with the norms for kink and displacement, in accordance with the type of coupling.
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Repair of VVN pumps is extremely rare. The components and parts of the device do not come into contact with each other, and the working fluid lubricates them, which increases the pump's resource and extends its service life.However, VVN also has malfunctions. Start by assessing the nature of the breakdown. In many cases, the normal functioning of the pump is impaired by insufficient vacuum generation. A similar defect appears when excess air flow enters the inside of the structure of the vacuum water ring electric pump through loose seals, worn out oil seals.

Repair of liquid ring vacuum pump

During operation, make sure that the oil seals and the O-ring are in good condition, as their failure causes serious problems and the threat of damage to the entire mechanism. It is necessary to tighten all nuts and screws, replace the old seals.

A detected imbalance in the pump operation indicates a lack of water. Turn off the unit and add more liquid inside. Contamination of the internals of the device causes a decrease in performance, which is restored by blowing the pump dry with compressed air. If the actions did not lead to the expected result, you will have to carry out a complete disassembly and cleaning of each component.

If the wheel turns incorrectly, check the operation of the electric motor, shaft alignment. If the engine burns out, as evidenced by the release of a burnt odor, it must be replaced. If there are no problems with the engine, simply align the impeller, lubricate or replace the bearings.
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Pumping equipment can solve many problems that arise when arranging a private house. With the help of such devices, they provide water supply to the house, carry out drainage, increase the pressure in the existing water supply lines. An equally important role is played by the electric pump in industry, where large volumes of materials are transported with its help.

But, no matter how high-quality and functional the unit is, if it is used incorrectly, it quickly becomes unusable. And if there is no money for qualified assistance, you will have to repair the pumps yourself.

Incorrect operation of the pumping device or complete cessation of its functioning are the result of failure of individual units of the apparatus. In this case, the repair of the pump will consist in the replacement of non-working components. The complexity of this action lies in the fact that the modern market has a wide variety of pumping equipment and each device assumes an individual design. Therefore, the repair of the device depends entirely on the type of device.

Types of pumping equipment

The main types of household pumping equipment include:

borehole pump for water;
water drainage unit;
pumping stations based on surface electric pumps.

Among industrial units without special skills, only 2 types of devices can be repaired on their own:

water ring apparatus VVN;
mud pump.

In accordance with each type of apparatus, separate algorithms for repair work are distinguished. In general, it should be remembered that if the motor block of the device has succumbed to damage, and there are no skills to work with winding and contact groups, it is better to give the device to a service. Also, before starting the repair robot or maintenance, the pump unit is disconnected from the electrical network and removed from the source.
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Regardless of the type, the well water pump has a cylindrical elongated body made of steel or cast iron. The pipeline is fixed on it at the top. In this case, the engine can be located both at the top and at the bottom of the unit. This type of electric pump is designed for the intake of liquid from a great depth. Often with a high level of abrasive substances in the water. Therefore, it should be remembered that it is much easier to prevent damage by periodically cleaning and checking the machine.

If, nevertheless, malfunctions have arisen, the beginning of any work is to correctly diagnose the problem.At the same time, even if thoughts arise about what exactly is broken, the entire device should be carefully examined for minor problems.

Cleaning the borehole pump

First of all, for borehole water pumps, it is necessary to check if the overload caused the shutdown. This is done in two stages:

The junction box is disassembled. To do this, first loosen the screws on the housing. Further, the working chamber is separated. And after that, the cover is removed from the engine compartment.
Next, there is a check of all components, including the motor winding and fuses, for traces of combustion and a corresponding smell. If the winding is damaged, it will have to be replaced with a similar one.

Also, it will not be superfluous during a preliminary inspection to examine the cable of the device for damage. The contacts at the point of connection with the motor are especially carefully examined. If damage is found, it is necessary to replace either the entire cable or the damaged section, carefully insulating the connection.

One of the common problems of downhole equipment is breakdown, when the pressure either weakens, or the device works, and the water does not flow at all. This is a consequence of working in wells with a high sand content. In this case, there can be three reasons:

The service valve is out of order. In this case, in addition to the fact that water does not pass, water hammer is also possible, which damages the units.
The filter in the intake holes is clogged. If the device is located close to the bottom, a large amount of abrasives can pass through the suction holes and gradually clog the channel.
The impeller is damaged or deformed. In this case, you can try to align the blades, and put a better filter on the inlet.

If, upon inspection, damage to the electromagnet is revealed, then in this case the water pumps cannot be repaired by hand. They can only be repaired and adjusted in the workshop.
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Drainage pumps are used to drain reservoirs with dirty water, as well as drainage from flooded premises. Such devices are made of plastic, steel or cast iron (industrial versions). As a rule, they are installed on the bottom of the source on special stands in a vertical position. They are characterized by high throughput.

Such devices are designed to work in difficult conditions, where the load on the working units is quite large. Therefore, malfunctions are not uncommon. There are 2 main signs of improper operation of the device: a complete lack of action on the part of the device or the hum of the engine is heard, but there is no pressure.

How to remove the impeller from the drain pump

In the first case, the reasons may be as follows:

due to sudden and frequent voltage surges, the capacitor on the electric motor burned out;
the float mechanism in a narrow block caught on one of the walls, while being in a position below the extreme switch-on point;
with voltage drops, the winding burned out;
the impeller blades are clogged with solid inclusions.

If the device hums but does not perform work, the reason may be the following:

one of the sections of the power cable is frayed or burned out;
the rod inside the apparatus has been loose or completely broken;
the non-return valve is damaged, as a result of which water does not pass into the working chamber and further into the water supply.

Of course, this list is far from complete, but more complex problems can only be identified in service centers using the appropriate equipment. In addition, even of the listed malfunctions without equipment, it will hardly be possible to solve even half of the problems.

It is possible to clean the impeller. For this, the fasteners on the case are loosened, and its cover is removed. It is advisable not to remove the wheel itself, but if the pollution is too serious, it must be done. Only first you need to drain the oil from the reservoir, which is located directly behind the impeller.Then all the sand, stones and dirt are cleaned out, after which the mechanism is assembled back.

It is also quite possible to change the cable yourself. In order to find the damaged area, the pump turns on and we try to squeeze the segments with our fingers. Where the electric pump works, there is a gap. If the gap is in the area near the motor, then the device will have to be disassembled. In this case, you will have to unscrew the three fixing bolts and a washer. Then the wire is cut above the damaged area, inserted and fixed again.

In some moments, it is also possible to replace the capacitor. But as for the winding, check valve or broken stem, repairing household pumps is not possible here.

Such a pump for increasing the pressure of water is used to supply water to private houses. In the course of improper installation or use, a number of malfunctions can occur that can affect the operation of the device. So, for example, the unit can operate, but water does not flow into the line.

There may be 2 reasons: valve breakage, lack of liquid in the working chamber. Repair of the water pump consists in filling the entire volume of the working chamber with liquid or in replacing the check valve. In this case, the check valve for individual models can be made from rubber yourself. For reliability, it is also advisable to check all joints of the pipeline, since they can cause a drop in pressure in the line.

Pump station impeller repair

Also, one of the consequences of a pumping station breakdown may be a jerky liquid supply. This phenomenon most often occurs when the hydraulic tank is damaged. Features of pump repair in this case are to check the integrity of the membrane. If water comes out when the nipple is pressed, the rubber membrane must be replaced. If there is visible damage to the battery, it should be repaired with a sealant. It is also advisable to pump up the tank pressure to a value of 1.8 bar using an air pump.

Also, the station may not turn on due to a breakdown of the pressure switch. In this case, a complete replacement of the block will help.
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VVN liquid ring units are used for pumping out contaminated gases and vapors, cleaning them and supplying them to a pipeline or tank. In comparison with household appliances, the design of such a unit is already more complicated, which means that it is more difficult to repair a water ring pump. And yet, certain faults can be removed by yourself:

Insufficient vacuum. It is a consequence of loosening of the shaft fastenings or damage to the stuffing box seal. The problem is solved by tighter fixing of the nuts or by replacing a damaged oil seal.
Jerky operation of the device or frequent shutdowns. This problem usually occurs when the liquid level in the working chamber is low. It is thanks to the liquid that the gas is pumped. In this case, it is necessary to replenish the stock through a special hole.
The performance of the unit drops sharply. In this case, most likely, the units of the device are clogged with dirt, dust or fine sand. In this case, the installation is disabled. All water is discharged through the corresponding throat. After that, the device is blown with compressed air masses from the cylinder. If the procedure does not help, the device is disassembled and cleaned manually.

There are several situations in which mud pumps are still subject to self-repair:

The unit is running, but not supplying fluid to the line. The reasons for this are 2. Either the line sections are not tightly connected, or the suction head is set too high. The solution is to reduce the distance from the device to the fluid reservoir, check all line joints for leaks.

In the event of more serious deviations in the operation of the drilling rigs, or if the cause of the breakdown is unknown, it is strongly recommended to contact a qualified technician.

The pumping station sucks proud!

Yes that's right. For 5 years now I have had a hydraulic system in a private house.In the basement floor under the house there is a capacity of 100 liters, (enough), a water flow sensor (TVO, 6), a pressure switch, a TAIFU booster pump, check valves, a valve for blocking water pressure differences. The elements are basically the ones that are discussed in this thread. Everything is simple and not expensive really.

And the principle of work is as follows. 1 stage of the system. When the water pressure drops after the water flow sensor, it turns on the booster pump, pumps up the pressure to 2.5 atmospheres, and turns off the pump. The second stage of the system. If the water pressure from the city mainline drops to 1 atmosphere, the water pressure drop blocking valve opens the water outlet from the 100 liter container. (valve for blocking water pressure differences), I chose from a fairly reliable principle of operation. As long as there is pressure in the city hydraulic main, at least up to 1 atmosphere, this pressure is retained - it presses the valve flap against the rim of the brass cylinder, and water from a 100 liter container cannot flow out, and water from the city main cannot flow into the tank either.

The water pressure switch in question in this post is triggered by this low pressure of 1 atmospheres, and turns on the same TAIFU booster pump, which, starting to pump water from a 100 liter container, pumping the pressure to 2 atmospheres, opens the pump contacts, it turns off. Thus, if somewhere in the house a tap or shower is opened. the pump turns on and runs, pumping out water from the container. As soon as the water flow stops, the pump builds up the pressure to the desired rate and turns off. ((Neighbors in the summer heat suffer from lack of water, but we have enough capacity for three days and wash and drink, all that. (Filters are). 100 liter tank - plastic. Water flow sensor contacts are connected in parallel to the water pressure sensor, adjusted to coordinated work.Check valves are in the break in the water riser, and they are needed so that water does not flow back into the inch pipe of the riser when the city water is turned off and to create the required pressure by the booster pump. empty 100 liter tank through (a simple ingenious solution in my opinion), a device that is used in toilet cisterns.

I took my Grundfos SL-10 in Dominor. Everyone liked the store, and the assortment, and prices, and service. Recommend.

Gnome 25-20 has been working for me for almost three years. Although they say that vibration pumps break down quickly enough, I have not observed any breakdowns during the entire period of operation.

I have a submersible pump from Grundfos with a remote control panel. I can say that it is very convenient - I turn on the water supply from the well without even leaving the house.

How to repair a water pump

Do-it-yourself repair of a water pump often occurs during unexpected interruptions in the operation of the device. This may be due to wear and tear of the equipment during its long-term operation, contamination of the device.
The article offers instructions on how to repair a water pump at home.

Domestic pumps are divided into three main groups, which depends on the properties of the pumped liquid.
They can be:

Drainage, designed for pumping not very dirty water, which can also be used to supply clean water, which makes the units versatile. Such devices can be used for pumping liquid from basements flooded with flood waters, or pumping water from a pool with their help.
The motor of the device is well protected from water penetration into the housing. A reliable oil seal protects the motor shaft from moisture. The impeller, on which the blades are located, creates excess pressure when the shaft rotates inside the chamber.
The cavities around the pump motor create a cooling circuit, which allows the pump to work for a long time without overheating.
Units supplying clean water are: surface, installed at some distance from the source of water, and suction occurs through a rigid hose or intake pipeline. Water can be sucked in from depths of up to 9 meters.

... submerged, partially or completely submerged in water and then fed upward. The depth of the liquid intake can be up to 100 meters. The absence of rubbing parts, constant water cooling, protects such units from overheating.

Sewerage devices are used to pump out household waste water that contains solid particles. By design, these are drainage pumps, but with a special wheel that is capable of chopping large pieces of dirt into smaller ones. Without such units, it is impossible to work cesspools in country cottages.

Before purchasing the unit, it is necessary to clearly define for what purposes the equipment will be used:

Irrigation and watering of the personal plot.
Household water supply.
Drainage works.
Use for a device in the heating system.
Drainage of reservoirs.

The intensity of operation of the unit is calculated, which depends on the volume of water required for needs.
It's not worth purchasing a model that has a low price. Be sure to carefully study the technical characteristics of the device, consumer reviews about it. The pump is designed for long-term operation, which indicates a long-term investment, and dismantling and then repairing or replacing the unit is very costly.
When studying the technical characteristics of the device, special attention is paid to the following:

is there a pump protection against "dry running" and possible overloads;
it is desirable that its parts are made of stainless steel, this will increase the service life of the product.

The requirements for the electrical network are taken into account, what voltage is required for its use.

Advice: When purchasing a water pump, you need to pay attention to the amount of permissible voltage deviation on the unit and the presence of protection of the electric motor from unexpected power surges in the system.

The principle of the device of all water pumps for a house or a summer residence is one, common. In the process of working, the device creates a vacuum inside itself, after which the liquid is drawn into the vacuum chamber from the reservoir, then it is pushed out with force and directed through the pipe to the destination.
According to the method of creating a vacuum, there are such principles of operation of the units:

The electromagnet is the main element. When an alternating voltage is applied to its windings, the element attracts the armature to itself, and after changing the polarity, the armature again returns to its original position. The photo shows the device of a water pump for a summer residence.

Water pump device

Within one second, the anchor makes one hundred vibrations.
The piston associated with the armature vibrates the same number of times.
Water is an elastic medium, therefore vibrations cause it to vibrate, and excess water is pushed through the valve into the discharge pipe.

It is much easier to prevent any breakdown than to repair water pumps later.

Advice: Ideal if regular inspections and maintenance of the equipment are carried out. It should be performed at least once a year, and optimally twice, before the start of intensive exploitation in spring and in autumn after its completion.

The procedure for prophylaxis is as follows:

The pump is pulled out of the well. This process is not always easy, especially if the depth of the well is large enough and the weight of the equipment reaches 50 kilograms. The work must be done with an assistant.
After removing the pump from the source, all the components of the equipment are carefully examined.
It is checked that there is no damage to the case, the presence of contamination, and whether there are foci of corrosion.
The pump starts up briefly and listens for its operation, any side sound may indicate a problem.
The likelihood of breakdowns can be significantly reduced by periodic monitoring of the operation of the unit and cleaning it from dirt.
Sand and silt on the pump indicate the need to pump the well, otherwise further siltation may cause the pump to break down, which is unlikely to be eliminated.

Connection diagram of a water pump for supplying water to a house

Possible causes of breakdowns and methods of their elimination are indicated in the table:

Submersible pumping equipment is used in most country houses and in many summer cottages. Without it, it is impossible to imagine the full and comfortable use of the water source. However, any technique is not immune from breakdowns, especially one that is constantly located and working in an aquatic environment. If you know something about technology, then you can repair the water pump yourself. Professionals will help you deal with more serious and complex breakdowns. But before you go to the service center with the pump, try to deal with the malfunctions that have arisen yourself. In our article you will find the most common problems that arise during the operation of submersible pumps, as well as recommendations for their elimination.

Even if you use high-quality pumping equipment from a well-known brand, it is possible that it will break down. Moreover, most often there is more than one cause of breakdown. Since the standard operating environment for domestic submersible pumps is water, the equipment is constantly exposed to negative factors. Since the cost of such products is rather big, it is quite expensive to buy a new unit. It is much easier and cheaper to fix the old one. That is why it will not be superfluous for any owner of a submersible pump to learn how to repair it on their own, as well as to properly operate and prevent possible breakdowns.

Probable causes of pumping equipment breakdowns:

pumping highly contaminated water with a solids content of more than 50%;
work "dry" (there may be several reasons from improper installation to complete pumping of water from a hydraulic structure);
the working fluid level when starting the unit exceeds 40%;
power surges;
poor quality docking of cable connections;
the cable on which the unit is suspended is not correctly fixed on the head;
improper fixation of the submarine cable.

Sometimes problems with the operation of the pump can arise due to installation violations and the use of other elements of the water supply system, for example:

in case of improper operation of the hydraulic tank;
if the system does not use a coarse filter;
the pressure switch is unstable;
there is no grounding, which can lead to corrosion;
freezing of the system;
failure of the magnet (in this case, only a workshop will help you).

In addition, all breakdowns can be divided into mechanical and electrical. As a rule, if immediately after starting the pumping equipment you hear extraneous sounds, this indicates a mechanical malfunction. In this case, you can try to do the equipment repair yourself. Common causes of mechanical damage:

the working environment contains too many solid impurities;
lack of oil, etc.

Worth knowing: electrical breakdowns usually lead to complete equipment failure, even if one of the components of the system breaks down. Sometimes, due to overloads in the network, automatic protection can work, sometimes there is a phase failure, the winding fails, etc.

Repair of domestic submersible pumps can only be carried out after assessing their condition and determining the cause of the breakdown and methods of elimination. So you can evaluate your strengths and decide whether you can cope on your own or you will have to turn to professionals.

Before starting repairs, to diagnose a malfunction, it is worth checking the operability of the main components:

First, check the integrity of the piston of the unit.It should be level without deformation or damage.
The air flow through the water intake holes must be uniform on both sides.
The gap between the piston and the coil magnet should be within 4-5 mm. If this size is exceeded, then the coils will beat. Decreasing the specified value may result in overheating of the motor.
The clearance between the valve closing the inlet and the body should be 0.7-0.8 cm. So water can flow freely from the unit in the absence of pressure.

Advice: before starting to look for the cause of the breakdown, make sure that the pump has stopped functioning not due to power surges or a lack of power. To do this, it is worth checking the voltage using a special device. It should be equal to 200-240 V.

Below we have collected the most common malfunctions of domestic submersible pumping products and ways to eliminate them.

If your pump starts humming after starting, but the water from the tap does not flow or flows very weakly, then the unit must be removed to the surface. This happens when the device starts to idle due to the loosening of the nuts securing the shock absorber.

To eliminate the malfunction, do the following:

First, you need to understand the design of the device. To do this, you can use the attached instructions.
You need to find a pump damper and two nuts on the stem securing it.
For better fixing, tighten these nuts all the way. Moreover, it is recommended to counter the uppermost of them.

Sometimes difficulties arise with disassembling the pumping equipment due to rusting of the tie screws on the cover. In this case, they can be cut off with a grinder. After the equipment has been repaired, new fasteners with a hex head are installed in place of the old screws.

Sometimes such a breakdown can occur due to damage to the check valve, which occurs due to mechanical wear of the part. The greatest damage to the valve can be caused by the sand contained in the pumped water.

Advice: if the pumping equipment stops working, first of all, it is necessary to check the integrity of all rubber parts. The damaged valve must be replaced.

If the unit stops pumping water due to a broken rod, then it will not work to change or repair it, you will have to buy new pumping equipment. Therefore, regularly monitor its integrity and serviceability.

If immediately after starting the pumping equipment the weight of the plug is knocked out, the problem may be related to:

Start diagnosing the problem by testing the cable. To test the functionality of this product, you will need a special tester. If the device shows that everything is in order with it, then the cause of the breakdown may lie in the combustion of the winding. If the cable is faulty, it must be replaced. However, in some units, for example, the Malysh pump, such a replacement cannot be made, since the cable is fixed in the housing with a compound.

When the winding burns out, it is better to immediately contact the service center, since they can rewind the winding efficiently and correctly only here. Sometimes it is much easier to replace an old coil with a new one.

If your pumping equipment periodically runs "dry", then this can cause it to overheat, which in turn will lead to failure of the mechanical and electrical components of the device. The fact is that when the pump casing is not cooled in an aqueous medium, it expands from overheating. This causes the compound surrounding the magnet to come off. As a result, this phenomenon can lead to strong vibration of the pumping equipment.

If the pump runs without water for a very long time, the compound will completely come off. This will cause the magnet to peel off and the piston to become stuck. This fault is very complex. To fix it, you need to do the following:

Disassemble the pumping equipment and disconnect all electrical equipment.
After that, find the location of the magnet in the housing.To do this, you need to knock lightly on the surface of the case. This will also let you know if the magnet has peeled off or not.
The internal parts are then removed from the housing. And in it, small grooves with a depth of 0.2 cm are cut with the help of a grinder. They should be positioned vertically and horizontally.
Place the same chaotic grooves on the inside of the case.
Then apply a high quality sealant or moisture resistant adhesive to the surface of the case.
Press a magnet into this glue.
After the glue is completely dry, you can start assembling the pump.

If water is pumping too slowly during pumping equipment, this may indicate that a small gap has been left in the vibrator. In this case, you need to do the following:

Remove the pumping equipment from the well and inspect it. Pay attention to the nuts attached to the stem. They should be tightly screwed in. Inspect the valve for integrity. There should also be no traction breakage.
If, after inspection, all of the above parts are in good condition, then the problem lies in the vibrator. It is enough to add additional washers to it.
With this simple method, you can increase the water penetration gap. This, in turn, will cause an increase in pressure and an improvement in the stroke of the unit.

To accurately determine the number of washers, such repairs must be performed in conjunction with the adjustment. To do this, first, one additional washer is screwed on, and then the pump is started to check how much its performance has improved. If necessary, add a second washer and check the unit again in operation. Thanks to this testing, you will be able to find the optimal number of washers for the correct operation of the device.

Video (click to play).