In detail: do-it-yourself repair of a nilfisk high-pressure washer from a real master for the site my.housecope.com.
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;
with the use of a special nozzle-brush, you can do sewage cleaning using a pipe cleaning kit;
By adding special tools, you can organize the foam treatment of various painted surfaces by using a jet tube with a nozzle.
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
Video (click to play).
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.
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.
