Do-it-yourself high-pressure hose repair for Karcher

In detail: do-it-yourself high-pressure hose repair for Karcher from a real master for the site my.housecope.com.

There is an equipment base in the tourist club Korbita. There is a well and a Karcher pressure washer. For three years the whole system worked without failures. And now, the Karcher hose broke. Many questions immediately arose. Where to buy a new hose? Where to run if Karcher is urgently needed?

We found out everything and share our experience! First, the Karcher hose is a high pressure hose and can be repaired. Secondly, Karcher high-pressure hoses can be repaired with your own hands, or you can do it in a specialized organization.

Do-it-yourself Karcher hose repair technology is very simple. First, cut the hose along the edges of the gap. Then we make the cuts even - either with special scissors, or with a machine, or with a cutting tool.

After that, we go to a special store for a fitting (a connecting tube along the inner diameter of the hose) and special power clamps. Ideally, put a pair of clamps on each side. Attention, simple clamps will not work!

Such a do-it-yourself hose repair has disadvantages. If the hose is used in the washing area, then the repair unit (clamps) will constantly cling to something, this is inconvenient.

Another minus. If you don’t have a fitting and a power clamp in your garage (in your warehouse), you still spend time looking for and buying a fitting of the desired diameter and clamps.

But there are also pluses. Such a repair of Karcher high pressure hoses will not be expensive. Especially if you need to lengthen the hose or make a few repair connections.

If you have little free time, you should turn to professionals. Pros . Repair the Karcher hose on site in 10 minutes. Repair carefully, the repair unit will not interfere with the work with the sink. Repaired on professional equipment and reliably.

Video (click to play).

Minuses . The cost of repair is 500-800 rubles for each node. That is, at a market value of a non-original, but acceptable in quality, Karcher hose of 2000-2500 rubles (autumn 2018), it makes sense to make repairs if you have a relatively new hose and no more than 2 damage. In other cases, it is worth thinking about a new hose.

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We have compiled a list of organizations in major cities of the Central Federal District where you can repair the Karcher hose:

If your city is not listed, try clicking here.

At least in a nutshell, but we need to talk about the reasons for the repair. In our case, the reason is this - the sink itself “shudders” at startup. The hose coming from the sink gradually rubbed against a sharp corner. But there may be other reasons - poor-quality hose material, mismatch of the operating pressure of the hose with the washing pressure, obsolescence of the hose, and others. Of course, all these reasons must be eliminated.

That's all! Keep your tool in good working order, keep enjoying your hands! Have a good day!

P.S. If you have up-to-date information or want to add an organization, write about it in the comments.

NB! Dear visitors! Please note! Only articles where the author declares the tourist club "Korbita" are the position of the leadership of the tourist club "Korbita" on the topics expressed in the article at the time of publication.

If the hose is torn off the flange, then you need to cut off the damaged section of the hose evenly, to the point where there are no extensions, cracks and undamaged cord.

Next, purchase the necessary flange and install it - fortunately, a large number of them are sold in auto stores and there is also a choice.The flange is inserted into the hose and simply crimped well with the help of a stop in the vise jaws and hammer blows from the third upper side.

If the damage is somewhere along the length of the hose, for example, a cut, a rupture, or something else, then we do exactly the same as in the first case, cut the hose and cut it to a whole, but here a connector of the desired diameter and a pair of clamps will help - just buy clamps not cheap, but good ones like those in the photo!

Repairing a high-pressure hose at Karcher is an almost hopeless business. If it is damaged in a straight section, crushed, chopped, and so on, then finding a double-sided Christmas tree branch pipe and compressing it at home on a hose is very problematic. You can do without buying a new (very expensive) hose only if it has begun to be torn off the outlet metal pipe. That is, the thread on the union coupling was torn off, and I don’t want to buy a new hose. Russian artisans do this:

A section of a rectangular pipe is taken, in my opinion, 45x25, the “CLIP” grip is carefully and thoughtfully cut out of it. With slots for the hose itself and for the pipe. I think it looks better in a photo. I repeat - if you don’t want to buy a new hose at all.

The design of the product, of course, is not a museum one, but it works properly. The connection may slightly dig, but this is not critical.

High-pressure hoses, more commonly referred to as high-pressure hoses (HPHs), are designed to create or absorb the working force that is transmitted under high pressure by liquids or gases pumped into them.

The main field of application of high pressure hoses is hydraulic and pneumatic systems of various devices and mechanisms. Outside of industrial production, motor vehicle owners most often deal with high-pressure hoses, these are power steering hoses (Power Steering), and those who use high-pressure pumps, for example, the most common Karcher brand in our country.

The design of the high pressure hose is due to the need to withstand internal pressure, which can reach up to several hundred atmospheres.

In addition, the inner surface of the high-pressure hose must be impervious to the media being transported. Therefore, its lower layer is made of oil and petrol resistant rubber or synthetic rubber.

For the manufacture of the upper, thicker layer of the high-pressure hose, wear-resistant rubber is used, which, if necessary, is supplemented with thermal protection in the form of a corrugated coating, metal or polymer.

A metal wire is wound in several layers between the upper and lower layers of rubber, thanks to which the hose receives the necessary rigidity and strength. Layers of wire are interspersed with thin rubber films.

Depending on the method of winding the wire, there are two types of high-pressure hoses:

  1. Coiled. In the production of this type of hose, the coils of wire are wound in even rows.
  2. Braided. In this case, the coils are wound at an angle to the axis of the hose so that the coils of the previous layer cross with the coils of the next layer of wire. Braided hoses are more durable and able to withstand more pressure than winding hoses.

In addition to the wire, textiles can act as an internal rigid frame.

The number of wire layers and the thickness of the rubber layers are set by standards that determine the scope of one or another type of high pressure hoses.

To fix the hoses in place, fittings (tips) are mounted at their ends, which are of the following types:

Fittings are fastened to the ends of the hose using compression couplings, which are pressed on special machines.

Depending on the type of shank, fittings are classified into series:

  1. Universal. This series can be used in all high pressure hoses except coil type hoses.
  2. Interlock. The series is used for winding sleeves.

When installing fittings of this type, it is imperative to remove both layers of rubber, inner and outer.

Image - Do-it-yourself high-pressure hose repair for Karcher

Fittings for high pressure hoses

The operation to remove layers of rubber is called hose debarking.

  • CS. Coiling sleeves are also crimped with fittings of this series, but it is no longer necessary to remove the rubber of the upper and lower layers.
  • Fitting failure is the most common cause of high pressure hose failure. This is due to the magnitude and intensity of the loads they experience.

    The causes of damage can be divided into the following types:

    • Manufacturing defects. Most often, this is poor-quality crimping of the joint of the fitting with the hose, due to the use of handicraft or non-adjusted equipment.
    • Damage received during the operation of the main mechanism. They appear as cuts and ruptures in the hose. The most common cause of them is the sagging of the high pressure hose due to the wrong length.
    • Damage caused due to inconsistency of the HPH parameters with the operating conditions. This could be a hose rupture or a fitting failure, due to which the pressure turned out to be higher than that for which the hose was designed.
    • In the same row, damage to the outer layer of the high pressure hose should be mentioned when it is used in a different temperature regime for which it is designed.

    Important! In order to protect as much as possible from possible damage to the high pressure hoses, when choosing them, it is necessary to carefully check the compliance of their characteristics and parameters with the operating conditions.

    Image - Do-it-yourself high-pressure hose repair for Karcher

    High pressure hoses with fittings

    First of all, we are talking about the calculated value of the maximum allowable value of pressure, temperature and the minimum bending radius of the hose.
    Among the damage to high pressure hoses, the most common are the following:

    1. Fittings corroded.
    2. Broken sleeve.
    3. Abrasion and wear of the top layer of the hose.
    4. Sleeve blockage.
    5. Violation of the tightness of the fitting connection.
    6. Hose fitting torn off.
    7. Fitting joint leak.
    8. Thermal damage to the inner layer of rubber.

    Back to content ↑

    From the foregoing, we can conclude that the repair of high pressure hoses consists either in replacing the damaged area or in replacing fittings that have become unusable.

    When replacing a damaged area, as well as when replacing fittings, it will be necessary to crimp the couplings, that is, technologically these two actions are very similar.

    The sequence of operations in this case looks like this:

    1. The damaged sleeve is disconnected from the main mechanism.
    2. On a cutting machine, a new sleeve is cut to the size of the old one. Moreover, for measurement, the distance between the ends of the nipples at its ends is taken. It is better to choose a high pressure hose designed for more pressure than that for which the old high pressure hose was designed.
    3. The markings that are placed on the sleeves will help you choose the right diameter.

    Factory marking DN indicates the diameter of the internal channel of the hose.

  • If a hose designed for increased pressure (heavy hose) is to be repaired, its ends are cleaned from the inside and outside to a metal braid. This operation is carried out on barking machines.
  • Then select the desired fittings. This can be somewhat difficult as imported fittings are manufactured to different standards.
    In case of difficulty, it is easiest to measure the old fitting with a caliper and thread gauge, which will allow you to accurately set the desired diameter and thread pitch and then select the desired parameters of the new fitting from the tables.
  • After debarking and selection of fittings, they are crimped on crimping machines. Removable swaging jaws are selected for each diameter.
  • The next step is to check the quality of the pressing. For this, a control probe is used, but it is best to test on a special test bench.
  • If a non-standard connection is found, then the repair is carried out using a repair fitting.For this, the head of the old fitting is taken, to which the part to be crimped is soldered.

    This method is often used by motorists for emergency repair of power steering hoses, as well as owners of pumps and Kircher mini-washers.

    The reason for the occurrence of damage to the power steering hoses most often is that when the steering wheel is rotated due to friction, a serious effort occurs. This force causes deformation of the elastic element, which changes the size of the holes in the distribution mechanism that regulates the pressure drop in the hydraulic cylinder.

    As a result, the power steering sleeve, connected to the restrictive valve, wears out. This power steering sleeve is designed for pressure, depending on the brand of car, from 70 to 130 kgf / cm2.

    At such a high pressure, repairing a damaged power steering hose with clamps or wire is almost impossible.

    There are two options left: either replace the entire power steering tube, or replace only the damaged part of it by moving the fittings to a new hose.

    Moreover, it is better to rearrange the fittings in a special workshop.

    Replacing and installing the power steering hose is as follows:

    1. The front of the car is raised on jacks.
    2. The steering wheel turns all the way to the left.
    3. A syringe with a tube attached to a needle is pumped out of the hydraulic booster reservoir.
    4. After that, the hose is disconnected, the working openings of the hydraulic system are closed with plugs.

    Power Steering Hoses

    The selection of a new hose is carried out with exact observance of the diameter, otherwise the performance of the hydraulic booster may change.

  • Then a new hose is installed, fluid is poured into the hydraulic system and the quality of the installation is checked.
  • Back to content ↑

    People with professional skills are able to repair high pressure hoses for hydraulic systems of a car or a Karcher pump manually using the simplest equipment and fixtures. But the quality of such repairs will remain in doubt, which is highly undesirable.

    It must be understood that high pressure creates a zone of increased risk, when a breakdown or abnormal operation of the high pressure hose can lead to serious consequences. Especially when it comes not to the Karcher pump, but to the hydraulic systems of heavy equipment. A far from complete list of such consequences looks like this:

    • Shooting of fittings and dangerous outflow of torn hoses;
    • Fire or explosion of the working fluid;
    • Loss of vehicle control;
    • Poisoning and burns due to liquid spilled from the hoses.

    Accurate observance of instructions, attentiveness and accuracy during installation work, as well as contacting specialists if necessary, will help to avoid this and ensure long-term and high-quality operation of the repaired pipeline.

    I am a crocodile, I am a crocodile, and I will be a crocodile!

    Sibgidravlika, LLC, repair company
    [COLOR=rgb(164, 124, 39)]Operations of the organization:[/COLOR]
    Repair of special vehicles, Rubber products, Repair of industrial equipment, Spare parts for agricultural machinery
    Knitted, 52/2

    just take the hose with you, they will make a new hose for the old fittings.
    10 meters about 1500 rubles.
    oops, plastic.
    By the way, they machined the fitting for me according to the model themselves.

    Repairing a high-pressure hose at Karcher is an almost hopeless business. If it is damaged in a straight section, crushed, chopped, and so on, then finding a double-sided Christmas tree branch pipe and compressing it at home on a hose is very problematic. You can do without buying a new (very expensive) hose only if it has begun to be torn off the outlet metal pipe. That is, the thread on the union coupling was torn off, and I don’t want to buy a new hose. Russian artisans do this:

    A section of a rectangular pipe is taken, in my opinion, 45x25, the “CLIP” grip is carefully and thoughtfully cut out of it. With slots for the hose itself and for the pipe. I think it looks better in a photo.I repeat - if you don’t want to buy a new hose at all.

    The design of the product, of course, is not a museum one, but it works properly. The connection may slightly dig, but this is not critical.

    High-pressure hoses, more commonly referred to as high-pressure hoses (HPHs), are designed to create or absorb the working force that is transmitted under high pressure by liquids or gases pumped into them.

    The main field of application of high pressure hoses is hydraulic and pneumatic systems of various devices and mechanisms. Outside of industrial production, motor vehicle owners most often deal with high-pressure hoses, these are power steering hoses (Power Steering), and those who use high-pressure pumps, for example, the most common Karcher brand in our country.

    The design of the high pressure hose is due to the need to withstand internal pressure, which can reach up to several hundred atmospheres.

    In addition, the inner surface of the high-pressure hose must be impervious to the media being transported. Therefore, its lower layer is made of oil and petrol resistant rubber or synthetic rubber.

    For the manufacture of the upper, thicker layer of the high-pressure hose, wear-resistant rubber is used, which, if necessary, is supplemented with thermal protection in the form of a corrugated coating, metal or polymer.

    A metal wire is wound in several layers between the upper and lower layers of rubber, thanks to which the hose receives the necessary rigidity and strength. Layers of wire are interspersed with thin rubber films.

    Depending on the method of winding the wire, there are two types of high-pressure hoses:

    1. Coiled. In the production of this type of hose, the coils of wire are wound in even rows.
    2. Braided. In this case, the coils are wound at an angle to the axis of the hose so that the coils of the previous layer cross with the coils of the next layer of wire. Braided hoses are more durable and able to withstand more pressure than winding hoses.

    In addition to the wire, textiles can act as an internal rigid frame.

    The number of wire layers and the thickness of the rubber layers are set by standards that determine the scope of one or another type of high pressure hoses.

    To fix the hoses in place, fittings (tips) are mounted at their ends, which are of the following types:

    Fittings are fastened to the ends of the hose using compression couplings, which are pressed on special machines.

    Depending on the type of shank, fittings are classified into series:

    1. Universal. This series can be used in all high pressure hoses except coil type hoses.
    2. Interlock. The series is used for winding sleeves.

    When installing fittings of this type, it is imperative to remove both layers of rubber, inner and outer.

    Image - Do-it-yourself high-pressure hose repair for Karcher

    Fittings for high pressure hoses

    The operation to remove layers of rubber is called hose debarking.

  • CS. Coiling sleeves are also crimped with fittings of this series, but it is no longer necessary to remove the rubber of the upper and lower layers.
  • Fitting failure is the most common cause of high pressure hose failure. This is due to the magnitude and intensity of the loads they experience.

    The causes of damage can be divided into the following types:

    • Manufacturing defects. Most often, this is poor-quality crimping of the joint of the fitting with the hose, due to the use of handicraft or non-adjusted equipment.
    • Damage received during the operation of the main mechanism. They appear as cuts and ruptures in the hose. The most common cause of them is the sagging of the high pressure hose due to the wrong length.
    • Damage caused due to inconsistency of the HPH parameters with the operating conditions. This could be a hose rupture or a fitting failure, due to which the pressure turned out to be higher than that for which the hose was designed.
    • In the same row, damage to the outer layer of the high pressure hose should be mentioned when it is used in a different temperature regime for which it is designed.

    Important! In order to protect as much as possible from possible damage to the high pressure hoses, when choosing them, it is necessary to carefully check the compliance of their characteristics and parameters with the operating conditions.

    Image - Do-it-yourself high-pressure hose repair for Karcher

    High pressure hoses with fittings

    First of all, we are talking about the calculated value of the maximum allowable value of pressure, temperature and the minimum bending radius of the hose.
    Among the damage to high pressure hoses, the most common are the following:

    1. Fittings corroded.
    2. Broken sleeve.
    3. Abrasion and wear of the top layer of the hose.
    4. Sleeve blockage.
    5. Violation of the tightness of the fitting connection.
    6. Hose fitting torn off.
    7. Fitting joint leak.
    8. Thermal damage to the inner layer of rubber.

    Back to content ↑

    From the foregoing, we can conclude that the repair of high pressure hoses consists either in replacing the damaged area or in replacing fittings that have become unusable.

    When replacing a damaged area, as well as when replacing fittings, it will be necessary to crimp the couplings, that is, technologically these two actions are very similar.

    The sequence of operations in this case looks like this:

    1. The damaged sleeve is disconnected from the main mechanism.
    2. On a cutting machine, a new sleeve is cut to the size of the old one. Moreover, for measurement, the distance between the ends of the nipples at its ends is taken. It is better to choose a high pressure hose designed for more pressure than that for which the old high pressure hose was designed.
    3. The markings that are placed on the sleeves will help you choose the right diameter.

    Factory marking DN indicates the diameter of the internal channel of the hose.

  • If a hose designed for increased pressure (heavy hose) is to be repaired, its ends are cleaned from the inside and outside to a metal braid. This operation is carried out on barking machines.
  • Then select the desired fittings. This can be somewhat difficult as imported fittings are manufactured to different standards.
    In case of difficulty, it is easiest to measure the old fitting with a caliper and thread gauge, which will allow you to accurately set the desired diameter and thread pitch and then select the desired parameters of the new fitting from the tables.
  • After debarking and selection of fittings, they are crimped on crimping machines. Removable swaging jaws are selected for each diameter.
  • The next step is to check the quality of the pressing. For this, a control probe is used, but it is best to test on a special test bench.
  • If a non-standard connection is found, then the repair is carried out using a repair fitting. For this, the head of the old fitting is taken, to which the part to be crimped is soldered.

    This method is often used by motorists for emergency repair of power steering hoses, as well as owners of pumps and Kircher mini-washers.

    The reason for the occurrence of damage to the power steering hoses most often is that when the steering wheel is rotated due to friction, a serious effort occurs. This force causes deformation of the elastic element, which changes the size of the holes in the distribution mechanism that regulates the pressure drop in the hydraulic cylinder.

    As a result, the power steering sleeve, connected to the restrictive valve, wears out. This power steering sleeve is designed for pressure, depending on the brand of car, from 70 to 130 kgf / cm2.

    At such a high pressure, repairing a damaged power steering hose with clamps or wire is almost impossible.

    There are two options left: either replace the entire power steering tube, or replace only the damaged part of it by moving the fittings to a new hose.

    Moreover, it is better to rearrange the fittings in a special workshop.

    Replacing and installing the power steering hose is as follows:

    1. The front of the car is raised on jacks.
    2. The steering wheel turns all the way to the left.
    3. A syringe with a tube attached to a needle is pumped out of the hydraulic booster reservoir.
    4. After that, the hose is disconnected, the working openings of the hydraulic system are closed with plugs.

    Power Steering Hoses

    The selection of a new hose is carried out with exact observance of the diameter, otherwise the performance of the hydraulic booster may change.

  • Then a new hose is installed, fluid is poured into the hydraulic system and the quality of the installation is checked.
  • Back to content ↑

    People with professional skills are able to repair high pressure hoses for hydraulic systems of a car or a Karcher pump manually using the simplest equipment and fixtures. But the quality of such repairs will remain in doubt, which is highly undesirable.

    It must be understood that high pressure creates a zone of increased risk, when a breakdown or abnormal operation of the high pressure hose can lead to serious consequences. Especially when it comes not to the Karcher pump, but to the hydraulic systems of heavy equipment. A far from complete list of such consequences looks like this:

    • Shooting of fittings and dangerous outflow of torn hoses;
    • Fire or explosion of the working fluid;
    • Loss of vehicle control;
    • Poisoning and burns due to liquid spilled from the hoses.

    Accurate observance of instructions, attentiveness and accuracy during installation work, as well as contacting specialists if necessary, will help to avoid this and ensure long-term and high-quality operation of the repaired pipeline.