DIY repair car wash

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

Cleaning the garage, warehouse, car cleaning, and even your own summer cottage, becomes simple and easy if you purchase special equipment for this - a pressure washer. It is difficult to imagine a car service without a car wash; it can also be used to wash concrete mixers, pipes and other equipment well. Everyone knows very well how convenient pressure washers are for farmers - cleaning of stables and agricultural machinery turns into a quick procedure that even a beginner can master.

The cost of the device varies from 4,000 to 20,000 rubles, depending on the material used in the manufacture of the body and other important parts of the tool. Experts note the excellent quality of brass products, the pistons of which are made of cermet. The correct choice of a pressure washer is not complete without due attention directed to the supplied attachments, it is good if the following components are included:

cutters designed for working with dirt;
sandblasting and suction tip;
a variety of brushes;
corner nozzles.

For a high pressure washer to show a long service life, use a water filter, which protects the inner structure of the hoses from contaminated fluid flow. At the end of each work, unused water must be drained from the equipment and pressure must be relieved.

Such preventive measures will save the equipment from sudden breakdown, but this does not mean at all that a situation will not come when a full repair of the device is required. You can do it yourself, for this you just need to know some of the subtleties of modifying the instance.

The main malfunction that can manifest itself after several years of active operation of the equipment is the bearing, which serves as a support for the swash plate pressing on the valve.

How does a breakdown manifest itself in Karcher:

The pressure washer runs jerkily, the engine regularly refuses to start, and a knock is heard from inside the structure.
The engine does not work at all, hums very much and heats up, literally plows with heat.

In this case, do-it-yourself Karcher sink bearing repair is the following sequence of manipulations:

Remove the hose with the gun.
Carefully disassemble the housing base, take out the electric motor equipped with the cylinder head.
Unscrew 6 self-tapping screws from the electric motor, the caps of which are made in the form of stars.
Open the box where the breaker is located and dispose of the capacitor along with the 2 power terminals coming from the breaker. Put the spring in a secluded place, if you lose it, it will be almost impossible to find the exact same part in stores.
Using a vertical stand, fix it firmly to the floor.
Place the pressure washer on this support with the electric motor pointing downwards.
Unscrew the 4 screws carefully by 13.
Oil will start to spill from the equipment, be careful.
Drain the oil into a container and set aside the rubber seal.
Inspect the condition of the clip with balls.
Armed with a screwdriver that allows you to remove the sprocket head mounts, remove the center bolt. To do this, clamp the shaft on the other side using a gas wrench.
Replace the bearing that is now visible.
The assembly of the equipment is carried out in the reverse order.
Do not forget to add new oil to the inside of the Karcher pressure washer.

Video (click to play).

Video instructions for eliminating possible breakdowns of Karcher equipment can be viewed below:

Before determining the method of how to repair the sink with your own hands, you need to determine the exact cause of the breakdown. The list of main faults includes:

Reducing the pressure supply. In this case, there can be no question of any performance, the time of the procedure immediately increases. Repair consists in eliminating damage to the oil seals. Why do the oil seals break? Long-term use and low-quality impurities, substances in the used water spoil and quickly wear out the material. Nothing can be done here, except how to replace the oil seals with your own hands.
One of the valves is defective. It is unlikely that you will be able to do it yourself, repair is most likely impossible without diagnostics with special equipment in the service center.

So that you do not have to face the listed malfunctions in the operation of the Shtil and Champion sinks, you should adhere to important rules and requirements:

Pay attention to the quality of the water used, the liquid must not be contaminated.
Repair of the pressure washer is not necessary if you make it a rule to carry out regular preventive maintenance of the product.
Pay attention to proper voltage and change oil on time

Do-it-yourself sink repair is, of course, a useful and developing business, but it's better to never face this need. The correct choice of a high-quality installation will help to avoid unexpected and premature breakdowns. On this issue, experts give several practical recommendations:

"Champion" will appeal to those who appreciate the reliability and ease of use of technology.
"Calm" is a surprisingly compact high-pressure washer, no less durable than the first instance.
"Hooter" is universal, it makes it possible to use it in different jobs, but experienced clients already know that the Chinese "Hooter" often requires repair with their own hands.

Finally, it is worth noting that Interskol is highly productive, but despite this, it costs moderately, which is very pleasing for people who are strapped for money or do not want to spend a lot on a pressure washer.

Before we understand the reasons for the breakdown of sinks, let's first consider the variety of devices of this type. Different types of sinks are used depending on the needs of the user. The difference is in the way of operation and productivity. This range of high pressure washers needs to be described in more detail:

the main purpose of washing cars (cars, trucks), special equipment;
further in importance: washing of courtyards, workshops, building facades, using a high-pressure extension hose;
the third function (for industrial devices) pumping out liquid from flooded places;
using a special brush nozzle, you can clean the sewer using a pipe cleaning kit;
by adding special tools, you can organize the foam treatment of various painted surfaces using a jet tube with a nozzle.

Read also: DIY American Truck Repair

There are several types of sinks:

household - this is the most acceptable equipment for cleaning dirty surfaces mechanically in any hard-to-reach places. The difference between domestic and industrial washes is only in their compactness and mobility, low weight and size, which allows you to enjoy the result of cleanliness yourself, to save time at home, in the country, in the garage.
with water heating - designed for organizing cleaning of hard surfaces by double washing (high pressure, hot water).
without heating water. For example: Karcher K2 minisink
autonomous - access to the power grid is not necessary, performance is provided by a powerful gasoline engine. For example: autonomous device Karcher HD 9/23 G of the Advanced series

After winter, car enthusiasts often face the problem of building up operating pressure in a car wash. It seems that the car wash is working (the engine is noisy), but the pressure of the jet is not enough for efficient operation. In such cases, most often the reason lies in the malfunction of the bypass valve.

But before repairing, you should rinse and clean the nozzles well. If the removal of contaminants did not help, then this means that the bypass is jammed, and it releases pressure into the return line, as a result of which, even after releasing the trigger of the gun, the pump continues to work forcing the water to circulate in a circle. To check, you can simply change the jet nozzle to a mud cutter, the problem remains, so we can safely proceed to the repair.

The essence of the repair is to flush the valve and its seat where it is inserted. To get to it you need:

- unscrew the protective external elements of the car wash

- dismantle the water intake pipe

- pull out the bypass valve with pliers

- we clean it from dirt and lubricate

- collect in reverse order

Usually, all repairs can take about an hour.

It often happens that devices that have become habitual fail. The equipment will have to be handed over for repair, bought a new one, or try to repair it on your own. It may well turn out that self-repair will not cause difficulties.

The low-cost high-pressure car wash (HPH) Elitech 1500 PC has served several seasons, having repeatedly paid for itself. One fine day, my favorite car wash refused to work. The required pressure was absent, and water flowed from the body.

After removing the plastic cover, the problem was identified. Due to the fact that the AED was left to winter at the dacha with water inside, the manometric shut-off valve was damaged. The water inside froze, and the ice damaged the plastic case.

An attempt to fill the crack with glue did not help, a fountain gushed out from under the plastic pusher, water got into the case with a microswitch (photo 1). It was decided to replace the faulty part.

Finding a spare part caused the greatest difficulty. Substitutes available on the Internet were offered for several thousand rubles, which is almost half the price of a new AVD. The market did not help either, the sellers could not even identify the valve. Oddly enough, the necessary spare part was found in an official service center.

The valve article (0901081280) was found on the Internet. It turned out that it is offered complete with a switch and a set of wires (photo 2), and the price is less than 300 rubles. Well, such a renovation is economically justified.

It is most convenient to unscrew the faulty valve with a head by 24 (photo 3, 4, 5). A serviceable part is carefully inserted (photo 6) and screwed into place. The switch body is connected to the valve. It is necessary to press down with effort on the body (photo 7). Without collecting the casing, water is connected to the mini-sink and the operability is checked. Everything, the repair is over.

For reassurance, you can also replace the switch body at the same time, because water got into it. This is also easy to do. First you need to open the black block that contains the wires. You need to unscrew two screws (photo 8 and 9). It is better to remember the position of the wires in the block right away, otherwise you will have to tinker with their reverse laying (photo 10).

Next, the wires are disconnected from the old switch body and new ones are connected. Assembly is carried out upside-down. Now the repair is over for sure.

Andrey Filatov

Washing a car, cleaning a garage or tidying up a summer cottage - all these works are greatly facilitated by a mini-wash. Some models are quite suitable for flushing pipes or concrete mixers. Unattractive and difficult work like cleaning stables or washing agricultural machinery is greatly simplified with the help of this miracle device. The topic of today's publication is the repair of a pressure washer with your own hands, because any technique tends to fail after a particular period of operation.

In order for the mini-sink to serve as long as possible, it is necessary to follow the not very complicated rules for the safe operation of the device specified in the instructions for use:

Remember to ensure that there is sufficient water in the sink. If this rule is neglected, the pump can quickly fail.
Take care not to bend the hose. Otherwise, the device will fail due to the excess of the water level. It will not be superfluous to make sure that you do not step on the hose or run over it with the wheel of the device.
Choose a mini-sink in such a way that it is equipped with a hose reel. In this case, the working life of the device will be much longer.
Remember to drain the water after you have finished using the appliance. Especially if you have operated your sink at low temperatures. Water, turning into ice, will provoke a breakdown of the device.

Important! It is equally important to release pressure from the pump.

Use your mini-sink very carefully. Water is supplied at high pressure, so even small dents may appear on the surface of the car if used carelessly. Therefore, you do not need to bring the device too close to the surface to be treated.

Important! It is strictly forbidden to point the device at people or animals, as this may cause injury.

If you need to take a short break from work, never leave the device turned on.
Make sure that the water used is free of foreign matter.
Change the oil in time.

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These preventive measures will protect the worker and those around him. But this does not mean at all that the sink will work forever. Even with the most careful operation, breakdowns cannot be avoided. Consider the rules for repairing a broken Karcher car wash.

Most often, bearings fail over time, which serve as a support for the washer acting on the valve.

The symptoms of bearing failure are as follows:

Unstable wash operation. In this case, the engine often does not start; a knock is heard inside the device.
It also happens that the engine does not start at all, it gets very hot when turned on.

Do-it-yourself mini-high-pressure washer repair is the following set of manipulations:

Remove the hose from the device together with the “gun”.
Disassemble the case, remove the motor.
Unscrew the 6 self-tapping screws located with an "asterisk" from the motor.
Open the box with the switch, remove the capacitor and power terminals that come from the switch.

Important! Watch carefully so that the details are not lost: it will not be possible to purchase something similar in the store.

Place the sink carefully on a horizontal surface, motor downward.
Prepare a container to drain the oil.
Unscrew the bolts by 13 (there are 4 in total).
Drain the oil into a previously prepared container, put the rubber seal aside.
Unscrew the bolt located in the center, having previously clamped the shaft with a wrench on the other side.
Replace worn bearing.
Assemble the mini-sink in the reverse order, remembering to fill in new oil.

Important! The original oil is difficult to find, so use a suitable analogue.

In addition to bearing failure, the following failures also occur:

Reducing the pressure. The performance of the device decreases, the time for performing washing procedures increases dramatically. The cause of this trouble is damage to the oil seals. Oil seals fail due to prolonged operation of the sink and the presence of impurities in the water. You can solve the problem by replacing the oil seals.
Valve defective. It is hardly possible to make an independent repair, therefore it is much wiser to contact a service center.

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The main condition for a long service life of a mini-sink is prevention.Follow the simple rules for using the device, and you will not have to think about repairing it often.From the author: Hello, friends! The development and implementation of innovative technologies in almost all industries contributes to the emergence of more and more devices, materials, services that greatly facilitate our life and everyday life. The car service sector is also not bypassed; for this, high pressure washers are successfully used. Image - DIY repair car wash

Today we will talk not only about the repair technology, but also tell you how to use this device correctly so that it will serve you for a long time and become an indispensable assistant in household chores!

Before proceeding to consider the types of malfunctions and repair methods, it is necessary to outline a number of rules that will significantly increase the service life of your device, as well as avoid elementary breakdowns.The most important thing is to carefully study the operating manual before using the device, it contains basic tips for the careful use of the device. In addition to the standard requirements, the following should be highlighted: Image - DIY repair car wash

Decrease in pressure in the apparatus. When this problem occurs, the machine may not be able to take full advantage of all the functions. This is one of the most common problems with these devices. As a result, productivity drops dramatically, leading to a significant increase in cleaning time.Most often, the reason for this is failed oil seals. Their breakdown can be caused both by the duration of their use without replacement, and by the presence of harmful impurities. This problem must be solved immediately and the defective part replaced. After all, this can lead to even more serious problems. Replacing parts is not a complicated operation, so you can do it yourself.Loss of performance can also result in the failure of one of the valves. This breakdown is much more complicated, and it is difficult for a non-specialist to fix it, so in this case it is better to contact a service center for such equipment.So, the sink began to work intermittently and the pressure dropped significantly. How to repair? In this case, we recommend doing the following work.The sequence of disassembling the apparatus is as follows.

We dismantle the casing from the washer disconnected from the network.

We turn the device upside down and remove the plastic pipe, usually it is fixed on three bolts, so here we need a hex wrench.

We remove the valve using pliers.

We inspect, wipe and disassemble for components.

We lubricate the parts and assemble them in reverse order. Do not forget to check the strainer, it is located on the pipe. It may be torn, and therefore contamination ends up on the valve. In this case, it must be replaced.

In order for your sink to serve you much longer without breakdowns, we advise you to adhere to the following operating rules:

monitor the quality of the water used, do not use dirty water, with impurities;
use filters, this will extend the service life of the device several times;
preventive monthly inspection will help to avoid unexpected breakdowns;
do not disregard the supply voltage and change the oil in a timely manner.

Today on the market of goods for car maintenance there is a wide selection of pressure washers, which differ in their functionality, quality and, of course, cost. Of the variety of manufacturers of such devices, the following, in our opinion, are the most worthy and high-quality ones:

"Champion" - is distinguished by its reliability and ease of use;

"Karcher" - a high-quality and reliable device, a wonderful and well-organized service anywhere in large cities;

"Calm" - compact and reliable sinks;

"Hooter" is a universal high pressure washer that can be successfully used not only for cars, but also for household work;

Interskol - the unit shows good performance and affordability.

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Posted by admin in Repair 04.24.2018 0 4,203 Views

Greetings, dear readers of my blog! Today I will talk about how to use the device correctly and what malfunctions of a pressure washer can occur when using it in a domestic environment. Today, many car enthusiasts often buy appliances for home washing their cars. And rightly so, because you don't want to pay extra money for such work, which you could do yourself! Moreover, it should be noted that the purchase of such a device does not at all limit you in its application only in relation to the car... The functionality of the device allows you to use it for various household purposes, so such a device will be a very useful accessory in everyday life.

In order for the device to serve as long as possible, you will have to observe all the points of careful operation, which are indicated in the instructions for use. Moreover, when using such a sink, the following rules must be observed:

Now it's time to tell you about the repair of pressure washers. Even with proper operation, certain breakdowns occur, which in any case need to be eliminated. This can be due to various reasons. In general, we will consider the main malfunctions and methods for their elimination.

Decrease in pressure. This is one of the most common problems that prevents you from getting the most out of your washer. In this case, productivity drops, which increases the process time. Most often this happens due to damage to the oil seals. These parts can break due to prolonged use or due to the presence of substandard impurities. This breakdown must be taken seriously and the part replaced immediately. Otherwise it can lead to more serious problems, so it is best to fix it right away. Often you can change them with your own hands, since there is nothing complicated about it.

Damage to one of the valves can also result in loss of performance. In this case, you need to delve into the reason in more detail. In most cases, it is best to contact service. If the device does not turn on, then it is highly undesirable to try to make it yourself (you should also contact the service center).

In order to prevent such damage, be guided by the following provisions.

Carefully monitor the quality of the water used and avoid clogging.
Install filters. With their help, you can extend the service life several times.
Conduct prevention. Inspect it every month to avoid unexpected breakdowns.
Watch the voltage and change the oil in time! Then there will be no problem.

Nowadays, many models of car washes are presented on the automotive market. Each of them differs in its features and cost... I have studied this issue more deeply and have compiled a small list of the most, in my opinion, quality manufacturers.

Champion. Very reliable and easy to use.
Calm. Very compact and robust.
Hooter. Versatile enough as it is ideal for any job.
Interskol. It has high performance and reasonable price.

On this, dear friends, I say goodbye to you! Don't forget to read the updates and share the blog with your friends!

Dear readers, if you liked this article, then you can always share it with your friends on social media. networks:

Sincerely, Maxim Markov!

If you do all this, then it will be cheaper to wash in a car wash and watch a cup of coffee from the rest room than to invest a lot of money and still be wet to your ears every time. Of course, some draw strength and get a lot of positive emotions from the slightest opportunity to dig into a car, so each his own.

In fact, there are many more defects. And most of them, if not immediately noticed, then only throw out the sink.

1) tightness. Nothing should drip anywhere! Dripping from the nozzle on the gun? Change the gun, the hose connection to the device or gun is dripping. Change the seal! Is the water supply hose connection dripping? Eliminate. Dripping under the pump. Bring it to the service.

2) the device jerks, then stops turning off automatically.

First, we look for a loss of tightness. If it is dry everywhere, then we are looking for a set of valves. In minisinks, they are plastic and often combine the system of automatic engine stop and pressure relief. In order not to guess which valve does not hold pressure, it is easier to replace everything, since in appearance they are all intact.

3) Check the condition of the oil at least once every six months. Alas, the window and drain plug are not made for this (except for professional AED). Therefore, you will have to disassemble the pump. Oil rarely flows out on its own. If this happens, then the sink is very overheated and all the seals have become wooden. But first, let's open the crankcase. That is, the pump is where the washer pushes the plungers. If the oil is transparent inside, then everything is OK. If it is chocolate, then the water seals (cuffs) do not hold water. If it is black, the device is overheated.

4) noise. The knock of metal in the pump is a very serious breakdown. Usually accompanied by a sharp drop in pressure. If not immediately noticed, then the broken spring in the pump will do its dirty deed. Will ruin the whole pump.

There are many reasons. There is not enough water in the supply.

The gun nozzle is clogged.

High pressure hose clogged.

if the pressure jumps, then a lot of air from the supply hose enters the pump.

Worn bypass valve (if any)

High pressure valves worn.

And finally, I would like to advise. If you remove the sink for a long time. Fill it with antifreeze instead of water. This will prevent the water in the pump from freezing and the formation of salt deposits, which, when dry, turn into stone. Sometimes salt accumulates so much that the pump plungers are jammed!

Do-it-yourself car wash "Karcher" repair

Details Published on 04/09/2014 15:50 Views: 2736

One of the most widespread models of Karcher car washes, which are found in private use, is Karcher 5.20. The machine is reliable, efficient and relatively inexpensive. But the eminent German Körcher units are prone to breakdowns.

I will consider the option of self-repairing the Karcher 5.20 car wash in case of one of the breakdowns that I have. Its essence lies in the fact that after about 2 years of operation, the sink suddenly stopped delivering the pressure it was supposed to be, an intermittent operation of the pump appeared and, accordingly, the pressure of the jet became intermittent.

Considering that, for objective reasons, the warranty repair of the device was excluded, I had to experiment and carry out repairs with my own hands in the garage.

I will try to describe the process in the form of a photo instruction:

Remove the case (assembled on bolts and disassembled with a screwdriver),
We take out a motor with a pump,
We separate the pump from the motor (this must be done very carefully, holding the pump up, otherwise oil will pour out from the piston drive)

Now you need to remove it from the valve piston. When doing this, do not use sharp, hard tools - they can easily be scratched.

We disassemble the pump in two (in half) and again remove the valves from it (I called them that)

And now the reason for the breakdown of the apparatus becomes visible: it turned out to be a small pebble that was stuck in one of the valves. How he got there remains a mystery - the sink was always operated with a filter and there was also an additional, external filter on the water supply.

The valve also has traces of very small particles and a coating like scale (apparently hard water).

We clean all the elements inside the pump and wipe it with felt or other soft cloth (plastic valves and any abrasive can aggravate the situation).

When finished, we assemble the pump and motor in reverse order.

If oil spills, you can replace it with any compressor oil.

After such a simple procedure, the car wash works like new.

Based on materials from the site:

Forum / Tools and equipment / High pressure washer problems

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and you will quickly receive an answer and advice from our specialists and forum visitors!
Why are we so sure of this? Because we pay them for it!

Usually, when the water is supplied and we turn on the sink to the outlet, the pump turns on for a second, as if creating pressure in some receiver. After that, from the button on the sprayer, the unit actually starts up, the compressor works and the water flies in the given direction.

This time, everything went differently: the pump is not limited to one time, but “growls” with a frequency of an hour hand, about once every two seconds. The impression is that somewhere inside there is a leak, and you need to constantly pump up water. After pressing the button on the sprayer, the sink is already working normally, but when you release it, these periodic starts again.

Tell me in which direction to dig in this case, where could there be a malfunction? The warranty has expired a long time ago.

11 april 2016
at 22:17

Already many people earn just talking on our forum!
For example, like this. Or like this.
it will take one minute.

Karcher car washes are a popular type of modern cleaning equipment that has become widespread, largely due to its reliability and durability.

Nevertheless, these car washes - just like any other equipment - inevitably wear out during operation, which over time can lead to its breakdown. Specialists who carry out the repair of Karcher car washes identify the following main malfunctions.

The most common problem is a decrease in the performance of the car wash pump. A drop in operating pressure is directly related to it, leading to a decrease in the efficiency of the washing equipment. The reason for the drop in pressure, as a rule, is the wear of the stuffing box seals available in the pumping unit of the Karcher car wash. This wear can be natural (associated with long-term operation); it can also be caused by poor water quality and the presence of abrasive particles. A symptom that allows you to identify the described malfunction is the appearance of puddles of water under the car wash. This signal should not be neglected: a problem that occurs can lead to even more serious consequences. The wear process will develop on an incremental basis, while high pressure water can destroy the oil seal and break into the crankcase of the drive mechanism. The oil in the crankcase will turn into a foamed composition and will not be able to fulfill its lubricating function. Obviously, the repair of a car wash in this case will turn out to be a much more costly event than if you contact a service center in a timely manner.

The failure of the Karcher car wash can be associated with such malfunctions as wear of the rubber rings of the pressure regulator or bypass valves, as well as damage to the hoses. Symptoms such as:

decrease in the recoil force of the pistol at the moment the car wash is turned on;
decrease in the density of the liquid stream;
decrease in its detergency.

Any of the listed symptoms is a reason for immediate contact with a specialized service center.

The Karcher car wash problems listed in this article are common, but, alas, they are far from the only ones. It is good news that the professionals of service centers these days successfully eliminate almost any defects, completely restoring the performance of car washes.

Why does the Karcher not gain pressure and work in jerks with the cutter on?

The problem can affect most budget sinks, for example KARCHER K 3, 5.200 and others.

Karcher can work in jerks for several reasons.

If there are air bubbles in the underwater hose, but we do not consider this issue.
A drawdown of electricity is unlikely to give the Karcher work in jerks, although this is also possible.
The main reason is the pressure valve. When the cutter was connected, my Karcher worked at intervals of a second - it turned on and off. All other problems (drawdown of electricity, airiness of the system) are excluded and checked. If everything is in order with this, most likely the spring of the water pressure valve is out of order. The valve is responsible for stabilizing the Karcher pressure and turning off the electric motor. If the karcher works in jerks at short intervals, this is most likely the reason.

The valve spring is made of stainless steel and tends to sag after some time of intensive use. Now, to turn on the valve (and turn off the engine), you need a much lower pressure, because the spring has sagged. The cutter turns on, the pressure rises sharply, the valve turns off the engine, the pressure drops, it turns on again and so on in jerks at intervals of 1 second. With the usual Karcher nozzle, everything is fine, the pressure there is not so great.

In this video - a more detailed explanation of getting rid of Karcher jerks.

First, let's take a look at Karcher 5.20

take out the valve

Here is the problematic Karcher pressure relief valve, the spring of which prevents us from living

There are several options to solve the problem.

But the original spring is needed - made of stainless steel, since the valve is always wet, and corrosion in this place is not allowed - otherwise it will jam. Hence the disadvantage - there are no good stainless steel springs)
stretch the spring mechanically. I didn't succeed, the spring lost its rigidity.

After stretching under compression, it took on its original shape.

compress the stem holding the spring. There is an adjusting thread, which can be tightened to shorten the spring and it will become stiffer. It is better to look at the video. We'll have to file the tip of the rod a little so that it twists deeper.

you need to twist a millimeter by 1.5 -2 from the original.

for this we clamp the Karcher valve in a vice so as not to let it turn

We disassemble it with pliers. The valve is threaded, so force is required. In a vice, you need to squeeze accordingly.

Here is this stainless steel spring

We file the tip of the screwed part of the valve on the grindstone by 1.5 - 2 mm to begin with

We tighten the spring. Putting the Karcher in reverse order.

LUBRICATE THE SPRING AND VALVE WITH SILICONE GREASE

If the jerks remain, you still need to tighten the spring

If the karcher works and does not turn off, then the spring is squeezed and the valve is clamped. You need to let go a little.

You may need to disassemble and assemble several times until you fully configure. Remember to RELEASE GUN PRESSURE and DISCONNECT FROM MAINS before each disassembly.

Video (click to play).

now the karcher cutter works fine - without jerking

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