DIY crane repair

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

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The monotonous murmur of a leaking tap violates the comfort of home comfort and is a great irritant to the nervous system. Uncontrollably falling water can cause a lot of harm, which will subsequently lead to unnecessary financial costs. In addition, the total water consumption increases significantly, which also adversely affects the family budget. Repairing the mixer will help to avoid such situations.

Initially, care should be taken to prepare a set of appropriate tools, which includes:

  • Pipe wrench;
  • Screwdrivers (flat and Phillips);
  • Open-end wrenches (12 - 19 mm);
  • Allen key (for lever valve);
  • Sealant or rags;
  • Pliers.

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Next, you should find out the place of the leak and determine the damaged unit. This is done visually. If water flows from the gander, it means that the valve will need to be repaired - axle boxes. Leakage in the places of threaded connections is eliminated by replacing the gasket or using seals (winding). If there is mechanical damage to the body or gander, the corresponding units will need to be replaced.

After identifying the problem, turn off the hot and cold water supply with taps that precede the mixer to be repaired. If the equipment has not been used for a long time, its valves may not be able to turn. They should be developed carefully using a lubricant.

Attention! The use of large forces or all kinds of tools (hammer, chisel, etc.) to turn the blocked valves can lead to their failure and the emergence of additional problems.

The main unit of most mixers is a crane box. This device performs the function of opening / closing the water flow and regulating its supply. In modern mixers, two types of crane-boxes are used: "worm" (with a rubber cuff) and ceramic.

The main breakdown of the former is the wear of the gasket, as a result of which the valve has to be clamped harder and harder each time. It is not difficult to make a gasket and replace it on your own. To do this, you need to perform a number of the following actions:
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Video (click to play).

  1. Pry with something sharp and remove the plastic plug from the valve, then unscrew the bolt located inside.
  2. Remove the valve.
  3. With the help of suitable open-end wrenches, remove the valve - axle box.
    Cut and install a new cuff following the pattern of the old thick rubber or leather gasket.
  4. Image - DIY crane repairInstall the repaired device on the mixer. In this case, it is important to check the presence of the O-ring.
  5. Assemble the removed parts.

The failure of the rubber cuff may also be indicated by the presence of a hum in the pipes at high pressure in the water supply system. Noises are caused by the resonance of a worn gasket.

The disadvantage of ceramic faucets - axle boxes - high sensitivity to water clogging. In the absence of high-quality cleaning filters in the system, their service life is significantly reduced. Most of the problems with such devices are caused by the wear of the gasket, which presses the rotating ceramic pair. As a result of the weakening of the pressure between the plates, a blockage accumulates through which flow occurs. In this situation, "build-up" will help. To do this, it is necessary to stick two layers of electrical tape on the gasket, while not forgetting to make holes for the movement of water.

In cases where the repair of a ceramic crane - axlebox turns out to be ineffective or impractical, you can replace it with a new one. When choosing a device, it is worth considering the diameter of its body and threads.

Advice! When purchasing a new crane - axle box, it is best to have an old one with you as an example.

The main unit of such cranes is a non-separable cartridge, which in some cases has to be replaced entirely. Another possible cause of a single lever valve leak is gasket wear. Its replacement is carried out according to the following scheme.

By unscrewing the fastening nuts, the mixer is dismantled and disassembled. Some types of lever cranes have problems with the removal of the lever. To avoid them, unscrew the fixing screw with a hex wrench, then loosen it with blows on the case (using a wooden guide).

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For replacement, a gasket with a diameter slightly larger than the socket intended for it is selected. The gasket should snap into place with little effort. After that, the mixer is reassembled.

Attention! It is not recommended to tighten the connections with great force. Such actions can only harm.

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There are several other reasons why faucets can leak. Quite often, water seeps out from under the hoses, gander, adjusting rod, etc.

In most cases, the reason is the wear of the oil seals and gaskets on these elements.
Sometimes valve leaks are caused by damage to the body or hoses.

In such cases, temporary repairs will help. Cracks in the metal body can be sealed with cold welding or silicone. Hose defects are eliminated with electrical tape or tape (the leakage flow is partially reduced).

A clogged aerator may be the cause of a low head. You should look for it at the end of the gander. It is better to replace a very rusty aerator, and it is enough to simply rinse a slightly clogged one, directing a stream of water to its outside.

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In order for the mixer to serve as long as possible, you should adhere to a few simple rules:

  • The valves must be tightened sensitively, without the use of excessive force;
  • Do not push hard on the taps or hit them with heavy objects in the event of any kind of leakage;
  • It is necessary to replace oil seals and gaskets at the first signs of their failure;
  • It is advisable to use purification filters in the water supply system.

In case of replacement of any kind of assemblies and parts, only high-quality materials should be used. Then the repairs will be effective, and the annoying murmur of falling water will become a very rare occurrence.

Recommendations for the repair of the KS-3574 truck crane

General provisions for the repair of the KS-3574 truck crane

During the operation of the KS-3574 truck crane, its component parts gradually wear out or fail, as a result of which there is a need to repair the crane.

Depending on the complexity of restoration, performance and resource of the truck crane, the maintenance and repair system provides for two types of repair:

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Routine repair (TR) of the KS-3574 truck crane consists in eliminating malfunctions and damages arising during operation, that is, associated with work to restore its operability or serviceability by replacing or repairing individual components.

Replacement of a component means removing a faulty part from a crane and installing a new or repaired one (ropes, pipelines, sleeves, hydraulic cylinders, etc.).

Repair of a component part of a KS-3574 automobile crane means disassembling this part and replacing defective parts with new or repaired ones (sealing rings, cuffs, oil seals, wipers, bearings, etc.). In this case, the removal of a component part from the product is made if it is impossible to repair it directly on the product.

During routine repair, individual worn out or damaged components can be replaced: parts, assemblies, units, including one main unit. The resource of the crane is not restored when performing routine repairs.

Overhaul (KR) of the KS-3574 truck crane is carried out in order to restore serviceability and complete (or close to full) restoration of its resource.

It consists in the complete disassembly of the truck crane, fault detection, replacement or repair of all its component parts with the performance of welding, fitting, adjustment and other special works, assembly, testing and painting of the truck crane.

The description of the procedure for carrying out major repairs is beyond the scope of this Manual, which only describes the procedure for handing over the crane and its components for major repairs, as well as receiving it from repair.

Recommendations for the current repair of the KS-3574 truck crane

Current repairs of the KS-3574 truck crane are divided into scheduled and unscheduled. The planned TR is performed every 2250 operating hours of the crane. Unscheduled TR - as needed.

Considering that the performance of the TR requires qualified personnel and special equipment, it is recommended to carry it out in stationary workshops.

Unscheduled repairs of the KS-3574 truck crane in the form of minor malfunctions that do not require large labor costs, high qualifications and spare parts, are eliminated by the crane operator on his own.

Complex failures of a truck crane are eliminated by a special repair team, which includes three to four people: a car mechanic, an assembly fitter, an electrician, a hydraulic specialist.

Since the frequency of current repairs is a multiple of the frequency of maintenance, then during current repairs, first of all, the performance of work provided for by TO-2 is provided, as well as work to eliminate malfunctions in the component parts of the crane found during previous maintenance.

During the planned repair of the KS-3574 truck crane, the following work must also be performed:

- disassemble the winch and slewing gears to determine wear and, if necessary, to replace gears, shafts, bearings and brake linings.

- while eliminating scuff marks and traces of corrosion on the journals of shafts, axles and gear wheels;

- to disassemble the telescopic boom of the KS-3574 truck crane and perform its maintenance, as well as, if necessary, repair its components;

- inspect the blocks of the boom head, hook hangers and, if necessary, replace the worn out blocks;

- replace the failed fasteners;

- make, if necessary, straightening and welding of damaged metal structures. Repair of load-bearing elements of metal structures using welding should be carried out by organizations licensed by Rostekhnadzor bodies;

- eliminate the existing leakage of working fluid and oils, and, if necessary, replace the seals;

- to carry out regulation and adjustment of mechanisms and devices of the truck crane;

- to carry out current repair of the chassis;

- touch up damaged or repaired surfaces of assembly units and the crane as a whole (if necessary).

Unacceptable wear values ​​and damage to parts and assembly units. TR of a truck crane is carried out by individual or aggregate methods.

With an individual method, the repair team repairs all components of the KS-3574 truck crane that require repair. With this method of repair, a high qualification of all members of the team is required, otherwise the quality of the repair will not be ensured.

With the aggregate method of repair, assembly units that require repair are removed from the crane, handed over to the exchange office of the workshop, and new or repaired ones are installed instead.

When carrying out routine repairs of the KS-3574 truck crane, the following rules should be observed:

- all welded structures, as well as assemblies of pressed-in parts, cannot be disassembled, except for cases when this is caused by the conditions of repair;

- disassembly of units that have transitional and fixed landings in mates should be carried out by pullers or on a press using mandrels;

- when disassembling threaded connections, a tool of the appropriate size must be used. Suitable fasteners must be temporarily reinstalled;

- when dismantling rolling bearings, the force should be applied to the ring, which is pressed-on or pressed-in. The transmission of forces through the rolling elements is not allowed;

- when disassembling crane assemblies, take measures to exclude depersonalization of parts. The parts are mutually adjusted, jointly processed, as well as those that have passed balancing and adjustment, during assembly must be installed in their original places;

- when assembling units on a KS-3574 truck crane, it is necessary to ensure tolerances for their relative position. Installation of pipelines in a stressed state is not allowed;

- assembly and disassembly of hydraulic equipment should be carried out only indoors, protected from dust, in conditions that exclude the ingress of dirt into the equipment.

Unacceptable wear values ​​and damage to parts and assembly units of the KS-3574 truck crane

Part name - Signs of wear - Repair method

Crane steel structures (base frame, turntable, boom base, boom sections, outriggers, boom support post)

- Cracks of any size in the base metal - Cut the weld crack to a depth of at least 0.5 sheet thickness and apply a weld seam.

- Cracks of any size in the weld seams - Cut out the weld seam along the length of the crack and replace with a new one.

- Local dents with a depth of more than 12 mm - Correct by placing additional parts (patches) or straightening.

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Rotating platform of the KS-3574 truck crane

- Wear of holes for the hydraulic cylinder mounting axle with a diameter of more than 92 mm, booms of more than 102 mm - Fuse the hole and bore.

Telescopic boom of the KS-3574 truck crane

- Worn out holes for the axle of fastening of the hydraulic cylinder for lifting a boom with a diameter of more than 92 mm, an arrow of more than 102 mm - Drill out, weld in new bushings.

Swivel support (slewing support)

- Cracks of any size and location, breakage of one tooth, tooth wear of more than 20% - Replace the support.

- The axial play of the ring relative to the ring gear is more than 0.6 mm - Replace the bearing.

- The support is jammed - Replace the support.

Cab, tanks, facing, casing of the KS-3574 truck crane

- Cracks of any size and location - Weld cracks.

- Damage to the walls (dents, holes) - Eliminate dents by straightening, holes - by installing a patch welded along the contour.

- Through corrosion of the walls - Correct by placing additional parts (patches) with welding along the contour.

- Decrease in the height of the vertical section of the main hook hook to less than 144 mm and 47 mm for the sub hook hook - Replace the hook.

- Cracks, tears and hairs on the surface - Replace the hook.

- Fatigue cracks at the shank (at the transition to the threaded part) - Replace the hook.

- Residual deformation (bending) of the hook body in dangerous sections and in places of transition to the neck, deformation of the threads at the hook and nut - Replace the hook.

- Cracks of any size, breaks of flanges with a depth of more than 8 mm in an area of ​​more than 25 mm, development (wear) of the groove to a radius of more than 12 mm or wear of the groove of the groove to a diameter of less than 247 mm - Replace the block.

- Cracks of any size and location, broken flanges - Replace the drum.

- Wear of the groove along the profile up to a radius of more than 11 mm - Replace the drum.

- Backlash of pressed axle - Replace axle.

Pulleys of brakes of the winch and the mechanism of rotation of the KS-3574 truck crane

- Seizure marks or marks on the braking surface more than 0.5 mm deep - Reground. Minimum admissible pulley diameter: winches - 196 mm; swing mechanism - 96 mm.

Gear wheels of reducers of the KS-3574 truck crane

- Broken teeth, cracks at the base of the tooth.Chipping of the working surfaces of the teeth more than 30% - Restore the teeth by metal surfacing followed by machining or replace the gear wheel.

Brake pads and bands.

- Wear of linings to a thickness of less than 2 mm in the outermost part - Replace linings.

Housings of gearboxes of the KS-3574 truck crane

- Cracks of any size - Replace housings.

- Fractures, cracks and permanent deformations, i.e. reduction in the free length of the critical springs (brakes, hydraulic equipment) operating in compression - Replace the springs.

Gearbox seals.

- Oil leakage along the shafts, wear and cracking of the oil seals - Replace the oil seals.

Cuffs of seals for hydraulic cylinders of the KS-3574 truck crane

- Oil leakage through the seal, wear and cracking of the lip of the oil seals - Replace the oil seals.

- Oil leakage through the seal, wear and cracking of the rings - Replace the rings.

Bypass roller at the base of the boom KS-3574

- Wear of the outer diameter of the roller is less than 076 mm - Replace the roller.

- Wear of the outer diameter of the roller is less than 076 mm - Replace the roller.

- Dents greater than V4 of the pipe diameter - Replace the pipeline.

- Crack - Replace piping.

- Tearing or crushing of more than two threads on a threaded joint - Replace piping.

- Leakage from the drain hole more than 22 l / min - Replace the pump, hydraulic motor.

- Leakage of working fluid due to wear of the spool, which is not eliminated by replacing the seals - Replace the directional valve.

Hydraulic cylinders of the KS-3574 truck crane

- Leakage of working fluid along the rod and from the cavity into the cavity, which is not eliminated by replacing the seals - Replace the rod or sleeve, piston, rod guide (depending on the wear of the corresponding part) or the entire hydraulic cylinder.

Hydraulic locks, safety valves and check valves.

- The tightness of the cavities is broken, which is not eliminated by lapping the mating parts of the hydraulic device - Replace the valve with a seat or the entire hydraulic device.

- Leakage of working fluid through the seals, which cannot be eliminated by replacing them - Replace the on / off valve.

Hoses of the hydraulic system of the KS-3574 truck crane

- Detachment of the sleeve casing - Replace the sleeve.

- Twisting the sleeve in diameter - Replace the sleeve.

- Cracks and mechanical damage in the upper layer of the sleeve - Replace the sleeve.

Possible malfunctions of the KS-3574 truck crane and methods for their elimination

This subsection contains a list of malfunctions that can be eliminated by the maintenance personnel during maintenance or current repairs using a set of spare parts without significant disassembly of the truck crane assemblies.

When eliminating faults found in hydraulic units, the outer surfaces of the parts to be removed, as well as the surfaces of the truck crane located close to them, must be thoroughly cleaned of dirt and dust.

The wrenches used for unscrewing the plugs, dishes and funnels for filling in oil must be clean.

When troubleshooting electrical equipment of the KS-3574 truck crane, the following rules must be observed:

- all work on replacing failed elements should be performed only with disconnected power sources;

- when soldering, use POS-40 solder;

- the soldering points must have an even, clean, shiny appearance. After soldering, these places must be varnished;

- connect wires in accordance with the marking of wires and contacts of elements;

- when soldering wires, do not bite out the cores, sharp kinks and twists, as well as build up wires;

- elimination of electrical equipment failures must be performed by an electrician. The repair and adjustment of safety devices must be carried out by specialized organizations.

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Malfunctions in the chassis must be eliminated in accordance with the operating instructions for the chassis. When troubleshooting chassis wheels, it is allowed to install the KS-3574 truck crane on outriggers.

After carrying out the work in which the seals were removed, the corresponding units must be sealed again, and a record is made in the passport about the work performed and the numbers of the newly installed seals.

Probably, each of us should know how to fix a water tap. Moreover, in most cases, the malfunction can be eliminated fairly quickly and at no extra cost, but the call of the master should be expected for more than one hour, and he will take a lot of money for the work.

In our article, we will tell you about the most common breakdowns of water taps, after which we will provide repair algorithms for most models.

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With experience and skills, any malfunction can be quickly eliminated

Before you repair a faucet mixer, you should take the time to analyze the situation. This way we can understand exactly what actions are worth taking, thereby saving a lot of time.

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Leakage is the most common problem

The list of breakdowns includes the following items:

In principle, this table describes the main faults. Other situations that may arise during the operation of the crane are derived from those already analyzed, and therefore they need to be repaired according to a similar algorithm.

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But such cracks cannot be repaired.

Also, before starting work, you should carefully familiarize yourself with the design features of the model you have installed. As a rule, an assembly drawing of a faucet comes with the product itself, therefore, when installing a new faucet, this document should be saved.

Note!
If you can't find the diagram, then you should enter the query "assembly drawing method for indicating the water tap" in the search engine and select your model.
Most manufacturers put their technical documentation online, so the chances of finding what you need is very high.

Now we will try to figure out what to do in each specific case. And let's start with the most common situation, namely, with the elimination of the causes of leakage of the shut-off element.

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Drawing of the body of the faucet and a schematic representation of the shut-off elements

Cranes, in which an axle box acts as a shut-off valve, are the easiest to repair.

The algorithm of actions here is as follows:

  • Before disassembling the water tap, be sure to shut off the water on the riser.
  • Remove the lining from the flywheel, under which the fixing screw is located.
  • Unscrew the screw using a screwdriver, then remove the flywheel from the guides.
  • Removing decorative cones, covering the place of attachment of the axlebox.
  • Using an adjustable wrench, unscrew the worn-out axle box from the socket... We clean the cavity from sediment and blot it with a rag, removing the remaining water.
  • We install in place a new axle boxscrewing it along the thread. In this case, you do not need to make unnecessary efforts so as not to damage the structure.
  • Next, we need to check the valve for leaks.... We turn on the water on the riser and inspect the place where the axle box is installed.
  • Grabbing the stock with pliers, we turn it several times... The flow of water must be switched on and off quickly and clearly.
  • We carry out the assembly in the reverse orderby installing decorative cones and securing the flywheel to the crane.

In some cases, crane axle boxes can be repaired. It all depends on their design.

Remove the gasket from the end of the axle box

Products with a rubber gasket are more maintainable:

  • Use a screwdriver to unscrew the screw securing the gasket at the end.
  • We dismantle the sealing element and install a new one of the appropriate size in its place.
  • We fix the gasket with a screw, clamping it tightly enough, but without deformation.

It will be somewhat more difficult with ceramic axle boxes:

  • Remove the rubber gasket from the end, and then remove the end cap.
  • We dismantle the ceramic plates, if necessary, unscrewing their fixing element.
  • We clean the inner cavity of the axle box, removing dirt that can lead to leaks.

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Fully disassembled ceramic axle box

  • We return the plates to their place, observing the correct position: when the stem is turned, they must completely cover the hole, interrupting the water flow.
  • We complete the assembly by replacing the dismantled elements.

Note!
Leakage is often caused by wear on the ceramic plates themselves, so a complete replacement may be necessary.
And it is quite difficult to find these parts, and the price of the repair kit will not be much less than the cost of a new axle box.

The device of the water tap and mixer, which is controlled by one lever, differs from the axle-box structure.

Accordingly, the dismantling of such a product for repair must be performed according to a different scheme:

  • First, lift up the red and blue front bezel.
  • Under the cover there is usually a screw for a Phillips screwdriver or a hexagon - we unscrew it.
  • Next, remove the handle, carefully disconnecting it from the stem of the ball or cartridge locking mechanism.
  • The next step is to provide access to the fittings themselves. To do this, unscrew one or two nuts.

Note!
Very often, manufacturers make an internal locking nut with grooves for a special tool.
You can either purchase a similar wrench, or try to unscrew the part with your own hands using the tools at hand.

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Unscrewing the nut with a special tool

By removing the nut, we gain access to either the cartridge or the ball valve. They are dismantled quite simply, and the replacement will not cause difficulties.

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Repair set for ball mixer

To restore the functionality of a single-lever mixer, most often it is necessary to completely change the functional element.

The instruction recommends to proceed as follows:

  • We remove the cartridge from the slot by pulling it vertically upwards along the guides. If the part is skewed, you can correct its position with a slight side impact.
  • We clean the cavity under the cartridge from rust and debris that can cause a leakage.
  • We install a new cartridge, fix it with one nut and check how well it blocks the water. If there are no leaks, and the adjustment is working properly, we assemble the mixer.
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Cartridge removed from slot

Ball valves have their own characteristics. Their main advantage is that the ball itself rarely breaks, so repairs usually involve replacing gaskets. We act like this:

  • Grasping the stem, remove the ball from the socket.
  • Using tweezers or small pliers, remove the spring-loaded gaskets that press the ball against the body.

Removing the sealing elements

  • We replace the gaskets, after which we install the ball in place.
  • Put a new sealing ring on top and clamp the valve with a union nut for the mixer.
  • As in previous cases, it is better to check the tightness of the structure before complete assembly.

In addition to the actual repair of the locking mechanism, other measures are sometimes necessary to restore the working capacity of the crane.

For example, in case of problems with the aerator, we proceed as follows:

  • Using an adjustable wrench with plastic covers, carefully grab the aerator and unscrew it from the spout.
  • We take out the installed mesh and thoroughly rinse it, removing all dirt.
  • At the same time, we clean the mixer spout with a flexible brush, trying to remove layers from the inner walls as much as possible.
  • We screw the aerator onto the spout, making sure that the thread is not skewed.

If a leak occurs at the place of fixation of the swivel spout, we proceed as follows:

  • Gently twist the union nut using an adjustable wrench. We remove the "gander".
  • We remove the rubber gasket from the socket.
  • We install a new one in its place. The diameter and thickness of both elements must match.
  • We return the spout to its place, fixing it with a union nut.

It is this gasket that requires replacement.

Some malfunctions do not affect the operation of the mixer, but significantly degrade its appearance. Typically, these include scratches, chips, scuffs, etc. And although the full restoration of chrome or nickel plating is quite expensive, throwing away the tap and buying a new one is not at all necessary.

You can return an attractive look to the product by painting:

  • We dismantle the mixer, completely disassembling it and removing all non-metallic parts.
  • We grind metal surfaces, removing scratches, and then thoroughly degrease.

Metallic silver aerosol

Note!
If the scratches are minor, then this polish can be applied without painting: it restores factory chrome / nickel plating well.

  • After finishing the polishing, we assemble the crane and put it in place.

Repair of a water tap and mixer can be carried out according to different schemes. It all depends on how well we analyze the breakdown and what decision we make at the planning stage. You can explore the troubleshooting steps themselves by watching the video in this article.

In the modern world, it is impossible to imagine a house without developed communication systems.

Over time, any type of faucet needs to be repaired.

And often you can observe such a phenomenon as water dripping from the tap. This can happen both in the bathroom and in the kitchen. No matter how tightly they try to tighten the tap, water continues to drip, thereby causing inconvenience: plumbing deteriorates, the sound of falling drops irritates, there is a fear that water may gush under pressure, and then more complex problems will come.

If water is dripping or streaming from the faucet in your kitchen, something needs to be done urgently. We need to figure out what causes the leak, what may be the reasons and what needs to be done to fix these problems with our own hands. Delaying repairs - aggravating the situation, increasing the time and cost of repairs. After all, hardly anyone wants to constantly hear the monotonous sound made by falling drops on the bottom of the sink.

Before starting repairs, you should understand the cause of this problem and why water is dripping in the kitchen. Very often oil seals, gaskets are damaged, valves are worn out due to a long service life. If the mixer is just purchased, the reason in this situation may be a factory defect.

The most common cause of water dripping is when the gaskets are worn out. A gasket is a rubber device or part that seals the connection at the valve in the closed position. If it starts to wear out, the mixer starts to leak. Sometimes the gaskets can be changed once every 6-8 years, although this is the exception rather than the rule. Not the best quality of the mixers and the water that flows through it contributes to wear. In addition to contact with water, the gasket also contacts metal parts and experiences some pressure. It follows that even a tightly closed tap can leak.

The main indicator of wear, in addition to leakage, is that the valve "hums" when turned on. The sound begins when the pressure of water acts on the pad and vibrations are created, the result of which is an unpleasant hum.

  1. Shut off the water supply in the kitchen, if there is a separate tap for this room, or throughout the apartment.
  2. Next, using a wrench to size or an adjustable wrench, unscrew the mixer axle and replace the worn gasket.
  3. Assemble the valve in reverse order.
  4. Turn on the water and observe: there should be no extraneous sounds, and the tap in the closed position should not leak.

If the replacement of the gasket did not bring results, then the problem may be in something else, namely in the wear of the axle box. The box is a block of the mixer unit located inside and regulating the water supply.Any device has its own service life, which is reduced due to conditions that create increased wear.

In this case, it is unlikely that you will be able to repair the crane on your own, experts advise not to try to repair it, but just buy a new axle box. You can install it yourself without any problems.

There are times when the tap does not flow when closed, but when it is opened, water begins to flow from under the valves.

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The reason in this case is the wear of the stuffing box.

To fix this problem and fix the mixer, you need to unscrew the stuffing box nut and change the stuffing box itself.

The oil seal can be made by hand, but in this case there is no guarantee for the long service life of the device, so it is better to use a new one.

If the above solutions to the problem did not help and the tap continues to drip, the reason may be a factory defect: a mismatch in the dimensions of any parts, chips or cracks inside the device, etc.

In this case, return the mixer to the seller who sold the defective product. But before that, you should make sure that the cause of the breakdown may be an incorrect installation.