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Karcher washer - low water pressure

berlingo 164198 38
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  • #1
    berlingo
    Level 22  
    maybe someone will advise me on how to repair a washer, karcher, on 220 v with an aluminum pump with the engine on, no pressure on the lance, water flies like a tap, sometimes it will snap for 2 seconds and then nothing
  • #2
    User removed account
    User removed account  
  • #3
    berlingo
    Level 22  
    the pressure regulator is under the 4 screws on the top of the pump
  • #4
    elektryk2000
    Refrigeration equipment specialist
    I had cases where the pump was good, there were the same symptoms. It turned out that the nozzle was worn (or what to call this element) - the one at the end of the "lance".
    I propose to replace the high pressure hose itself together with the lance from an efficient device and then go to the pump.
    Regards
  • #5
    lopr_pol
    Level 28  
    If he flies from the lance as if from the tap, it may be something from the pump. When the stream starts to dust, the lance needs to be replaced, and this is waiting for me too, plastic and bowel are made at the ends of the lance regulating nozzles,> 150, - in the back.
  • #6
    berlingo
    Level 22  
    The lance has a porcelain tip, so it will not be made so quickly, sometimes it surprises for 10 seconds as if there was no water but it gets
  • #7
    lopr_pol
    Level 28  
    The end of this is, I remember, metal (karcher mxs720), but the adjustment is on the plastic cam and it wipes the trash.
  • #8
    pawelsiara74
    Level 22  
    Hello today, I also had a problem in the 520M model, the water was also running at low pressure, so after dismantling it turned out that there was sand inside the pump in the valves and the valves did not close and there was no pressure. proposes to disassemble and clean everything nicely, see if any gasket has broken or something like that :) and check the pistons whether they are tight or not let through.

    And so I will ask if anyone knows what oil is poured into the Karcher 520M washer and how much of this oil? because I had a white oil tram, but it's probably because the water got in and this oil was created and now I have to pour a new one, but I don't know what; /
    Regards
  • #9
    geex
    Level 12  
    Depending on the Karcher model, there may be several reasons:
    1) most likely - the relief valve on models k 720 and k 520 blocked
    tip: remove, lubricate with water silicone (not to be confused with construction silicone) and put it back on if the O-Rings on it are whole and not used
    2) pressure valves are to be replaced, i.e. their seats or plates (made of Teflon) are scratched, regeneration is not an option for about PLN 17, you should buy new ones
    3) as mentioned before, sometimes only impurities between the valves prevent pressure build-up (valves do not close fully)
    4) check high-pressure seals (black rings in the pump head where the pistons "run") and the pistons themselves for wear
    5) check for leaks at the pump or in the section of high pressure hose with a gun
    6) A rinsed lance nozzle can also be the cause


    PS Regarding oil, it is best to make bz silicone grease, but it can also be engine oil (better quality)


    If you have any questions, please write: geex (at) o2.pl - topic: Karcher serwis :) :D
  • #10
    dex
    Level 27  
    Can the lance tip, the brass nozzles covered with plastic, be purchased? I called one service, they said that not only the whole lance - PLN 130, probably net ..

    It's a bit strange because the lance is unscrewed so it would fit as if it were interchangeable.
  • #11
    azu
    Level 17  
    You can. They try to push you the "extra" lance :D . On my K720 I had the same problem, it turned out that the nozzle was damaged.
  • #12
    dex
    Level 27  
    Well, after all, if they don't sell me, there are probably 3 services, if not 4.
    Interestingly, karcher on its main page provides a catalog with parts, e.g. for my 520M, here is the link:
    http://scripts.karcher.com/scripts/bta/document/ETL-59558330-PL.pdf

    There is also a ready search engine by model or product number. If you choose a similar code, only, for example, instead of 1.069-130 we will give it with an ending - 280 GB we have the Polish version :) :)

    edit:
    ------------------

    Hmmmm I looked through this parts list and I don't see that nozzle there in the lance section. Did you buy it - because it is not visible in your model either http://scripts.karcher.com/scripts/bta/document/ETL-59557390-PL.pdf
  • #13
    azu
    Level 17  
    A friend in Wroc³aw bought me, because there is no service in my city.
  • #15
    pulikow
    Level 20  
    I have a similar problem with the Karcher 570.
    Namely, the high pressure "pulses" so that for one second there is high pressure and for the next one it is not there all the time.
    The pressure gauge flies to around 150bar and it drops to zero (over and over again).

    If I reduce the pressure with the regulator, I manage to set a constant stream of water around 40 - 50 bar.

    The pump is not leaking anywhere so the piston seals look good.

    I suspect the pressure regulator is malfunctioning.
    I replaced the O-ring on it, but I didn't have the same one, so I gave it a thicker one - as a result, there was a small change - the pulsing was "slower" 2 seconds of pressure and two seconds of break.

    What should I do in this case?
  • #16
    dex
    Level 27  
    Is the pressure regulator a relief valve from the description?

    I have regenerated my nozzles and now I have that if I set it to the max, it will turn it on, it stops - the pump turns on and off. When you first set a small pressure and tighten slowly to the maximum, it is already pulling, but often it starts to pulsate again. O-rings also gave new ones - I was already thinking that maybe I made the nozzles too tight and the pump has too much resistance ("thinks" that the gun is not turned on) and the valve is disconnecting.

    Valves and sealants are also new.
  • #17
    pulikow
    Level 20  
    I talked to one washer "macher" and this one briefly stated - slightly bore the lance nozzle.

    It is a bit logical because I just noticed an excessive increase in pressure and then disconnection.
    The pressure at my nozzle was about 160 bar, which is much more than the parameters of the washer provide.
    I did a little experiment: I turned the tip of the lance to the low pressure position, squeezed the trigger and at the same time twisted the tip towards high pressure with my hand.
    In this way, I managed to pull out about 140bar of constant pressure and then the valve was turned on.
  • #18
    dex
    Level 27  
    I also think so, because now it goes like a storm, so it works constantly at 95% of the power, sometimes when it spreads like this and dokrece to the maximum, it often works on, but often also stops when it tightens too quickly to the maximum. I can hack whatever I want with a meter. On the old one, to get a similar cleaning effect, or even weaker, I had to 'spray' literally from a centimeter because the stream was as if triangular.
  • #19
    as66
    Level 12  
    I have a similar problem - maybe someone will suggest a solution to the problem:

    The HDS 550C hot water washer pulses in a few seconds' cycles.
    (in "chemistry" mode, it does not flash - washing pressure is low)

    Everything indicates that the pressure is to blame, because after removing the lance it does not pulsate (although the lance is not free).

    What's most likely broken: the pressure switch? (where is he?)

    Sealing components?

    Something else - maybe a stony heater?

    Help!
  • #20
    Los_sandalos
    Level 27  
    Hello, I didn't want to create a new thread so I'm connecting to this one.

    I have a question: what are the prices of consumables for karcher washers? Specifically, it is probably a fairly popular 570 washer. I have a larger washer (6 / 13C +) but I wanted to buy something small, portable and probably better to regenerate something from older but I think more durable machines. I am interested in parts such as valves, piston seals and what else would be worth mentioning.

    Thank you in advance for your response.
  • #21
    dex
    Level 27  
    About 30% of the new one came out to me. If I bought a new lance, it would be close to 40% of the current store price. Parts are expensive. Valves PLN 17 (for one piece) sockets, seals also something like that. Call us, drive up and ask, they will tell you because they sell parts.
    A complete renovation with pistons and a lance would certainly be 50% (currently PLN 750 new in the store). It is worth considering and how sometimes it breaks to undress, clean and drive as much as possible and then ... buy a new one. Because you have a new lance, cable, etc.

    Well, unless they start making counterfeit lances, I saw in Castorama recently, but mine wasn't there.
    As for our Polish .. conditions for lances PLN 120 or PLN 130, or a stupid water filter PLN 40, it's a lot. Generally, Karcher is expensive, and today it is not like 10 years ago that they were only on the market .. Therefore, it is worth considering another company. It comes the same, and instead of paying 50% for renovation after a few years and still having the old Karcher, it is better to buy another new Einhel, or BLACK & Decker or another.
    The prices are legendary by. me - buy a tip for washing a car, a rotating nozzle, nozzles for sandblasting or pushing through the sewage system, then you would buy another carszer or two ..
  • #22
    Los_sandalos
    Level 27  
    If the seals do not show visible signs of wear and the oil is clean, it is probably not necessary to replace them. I will replace the valves because they determine the operation of the washer the most. O-rings can be replaced with standard ones, so it shouldn't be too expensive. If the whole event (including the washcloth) will fit in PLN 300, it will probably be not too bad. The 570 is probably a good model, so you won't find anything better for this money. The new models (the cheaper ones) have series (commutator) motors, which, combined with moisture, is not very happy. Induction motor (as in 570) has a slower speed in nature, so no additional gear is needed, which means higher reliability.

    Does anyone know what oil and how much is poured into the oil chamber? In my HD 6 / 13C the karcher provides for a regular 15W / 40 motor but what should be in the 570?
  • #23
    dex
    Level 27  
    There are 'special' oils with a carszera mark, some ecological ones, supposedly silicone-based. It is expensive and in 1 liter bottles (I think PLN 80) so it is not very profitable to buy it, because even a glass does not go there. Even on the website (the one that does not cost too much) they will tell you that you can flood the usual gearbox, some GPL or something like that. They may tell you that it has to be semi-synthetic, but it will be normal too. In this application, oil is an oil, but not sunflower oil ;)

    I replaced it, because when I was taking it apart, the head was horizontal (you need to be vertical) and it spilled out ...
    If the oil is not mixed with water, leaks may remain the same. Even if it spills a little, it is well splatter there, so super precision in the amount of oil is not necessary, as long as the cam is flooded.
  • #24
    Los_sandalos
    Level 27  
    Ok, I'll pay attention to the position when undressing.
    By the way, I found a service from this karcher and only the symbol of the oil bottle is given there, but neither the volume nor the type of oil was marked.
  • #25
    dex
    Level 27  
    You have to take it logic, see how it works after "dry" disassembly. The pistons are pressed by a cam, a beveled cylinder is driven by the motor shaft. It is important that the cam, where it slips out, is flooded with oil, all of it. In fact, more, a lot, you won't pour in anyway, it will spill out. This is poured in before putting on the head, at least for me. I poured the usual gearbox, there are no large temperatures and loads there. It is also cooled by water.
  • #26
    Los_sandalos
    Level 27  
    Ok thanks for the suggestions. I think a not too thick gear oil would be good. Something like that about 70W. Thick oil gives a lot of resistance, which unnecessarily overloads the engine. I wonder if it would work, for example, from automatic transmissions / power steering, i.e. ATF. It has a much lower viscosity and should do the job.

    Thanks for the answers and sorry for "philosophizing". :D
  • #27
    robokop
    VIP Meritorious for electroda.pl
    I have an old type washer, a two-piston, eccentric-driven pistons and I fill it with an ordinary Hipol, in the end it is only to lubricate the rubbing parts.
  • #28
    Los_sandalos
    Level 27  
    I dismantled the washer, it turned out that the valves cannot be removed too much, cleaned and put back in without damaging them. According to of the built-in pressure gauge, the pressure is approx. 80 bar. So I think the valves will have to be replaced as a whole (6 pcs). The worst thing is that one of the pistons has a scratch. Pistons and all seals, so it would be appropriate to give new ones. In addition, the overflow valve jams - high pressure comes on once every few presses of the lance valve.

    Enough "negative pluses" but first a small explanation - I bought the washcloth "blind" on the Allegro website, the photo was bad. I guess I thought it was 570. Today the package arrived (quickly, to the current situation at the post office) and it turned out to be 695, so a more powerful washer - 110/130 bar / 2.2 kW / 450 l / min. The oil chamber is full of clean oil, the engine is operational, the washer is "not buried". I think it pays off to regenerate it, the costs will go up quite a bit (the pistons), but so far I have spent a total of PLN 170.

    Maybe you know some cheap store selling karcher parts?
  • #29
    elromano
    Level 11  
    I have 2 washers karcher 510 and karcher 205. 510 is fully operational, I only need a hose, gun and lances for it. In turn, the karcher 205 is leaking on the water supply.
    I am asking for any information about these washers and, if possible, instructions for use. I have already searched in goggles but found nothing.
  • #30
    Los_sandalos
    Level 27  
    If you are interested in the construction scheme, you can easily download it from the karcher: go to the website-> parts list-> enter K205 and you can download it for free.