[Solved] Karcher K 520 M Pressure Washer Not Turning On: Microswitch Checked, Possible Broken Part?

Good day.
I can not attach the Karcher K 520 M. Washer, I unscrewed the electric box, checked the micro switch - it turns on.
Please, take a look at the pictures. Maybe a fragment of something with the elements responsible for tightening the microswitch broke?

Can you buy these elements somewhere, or the entire cover?

It's all right. The control piston in the head of the washer is blocked, it must be removed and greased with silicone grease.

I also guessed it, but only late in the evening when going to work, there is still control of the water pressure by the switch. A pressure switch (control piston) has hung - red. It's all going on. We probably mean the same element. I could not take it out, so I just unscrewed the lock and let the penetrator run. this "nut" green turns in a circle, but I do not know how to take it out, I do not want to damage it this miracle.

Some users, after locking the spindle that attaches the limit switch, have the habit of "hammering" after it. It will help but short-term and damage the device. Once you take apart the plunger, buy a repair kit, it costs you a penny.

I am ready to kick a complete, whole, part number 2615446BS, but it's just that I have no idea how to pick it. so far it has helped the penetrator, but it stutters. The best solution is to turn off the pump as it works, then there is no problem with switching on. I will work on it, maybe I will gouge it somehow. I do not want to pull the rod for strength, what somebody treat it with a hammer. I have a little more respect for the equipment.

Hello
I also have to replace this spindle with me. Q. Have we managed to get it out and how and where it can be purchased quickly.

So I pulled it out.
In sequence :
after plucking the No. 1 element with a thin screwdriver, then I turned the blue plunger itself - 2. It has a key finish, but of course none will come in, there is no speech. It was possible to unscrew without a key.
After removing the stem, the ball 3 came out, pin 4 and the spring 5 which are placed in the element No. 6. Removing the 6th was the most troublesome. The M10 screw with fine thread helped. I screwed in the 2nd place and really pulled it up. He resisted with resistance.



entirely as a spare part it looks like this:


Unfortunately, it does not have silicone grease. I have "ordinary lubricants" and ceramic grease for the guides in the Permatex(R) Ceramic Extreme Brake Parts Lubricant. It's just that the description is clearly written only for metal-to-metal contact, so I will not use it. I still have Teflon grease (manufacturer), Teflon Grease, whose purpose is to lubricate bearings, threads and seals. Mainly used in bicycles. Resistant to salt water, completely prevents corrosion, displaces water. Could I apply this or do I have to look for a silicone?
I was also thinking about replacing the seals, but some are ordinary o-rings, while others have a square cross-section. This little one is probably impossible to buy at all. As a repair kit, Karcher probably does not occur, and does not want to risk destruction when removing without having at hand new ones. Nothing liquid ever, so he can leave it?

Added after 2 [minutes]:

jalop wrote:

buy a repair kit, it costs pennies.

willingly. Suggest where? if it's a karcher set, give it your part number by grace. Service in Głogów, to bring them the whole device.

witek1965 wrote:

willingly. Suggest where? if it's a karcher set, give it your part number by grace. Service in Głogów, to bring them the whole device.

I give you my part number + drawing + page, where you can buy it.
Karcher K520M (1.069-280.0) Pump Spill Valve: 1 - 10

Link to the store
Link number 2

Parts catalog in the attachment.

Thanks. And how do you think, from which side did I take the screenshot? Here in Poland would interest me more. Tomorrow I will try to give these numbers on the website and I will ask if they have. Note that B1 and B2 have different sizes.
Well, these are not such pennies again. Our top-shelf O-ring (B4) 12x2 costs PLN 1 instead of $ 5.13. if I know my life, by Karcher, it will be x 2
Well, I think there are no seals up to 5, in my picture up to 6.

In Szczecin, they said they would have this part for about PLN 120.

And all clear. It is a pity that they did not give part numbers on these diagrams, it would be easier to talk to the service. anyway, the topic is divided into prime factors. Resolved and settled. For regeneration, and if it fails, it will be replaced. I'm not closing for now. Tomorrow, maybe I can get a silicone grease, if there is no information on whether I can use Teflon and let me know how it works.
Added after 19 [hours] 16 [minutes]:
So, I greased all the elements of the control piston, cleaned the socket of the copper tube cleaning cloth, folded, pressed in, felt the resistance. The stem goes inside under the pressure of a lot of strength, I do not advise my hand, because it sticks in quite tightly, and comes back without a problem. You hear characteristic clicking. I put everything together, plugged in to electricity and water and ................... turns on but does not turn off and does not produce pressure. Well, there is an increase in the lance compared to the flow without the pump on, but only symbolic.
What's this time, because I've already been stupid. I recently used a washcloth two weeks ago. This valve was cut (the penetrator did not help too much), but the pressure was OK. Yesterday I took out, today I folded, everything goes nice, only the pressure is missing and the pump works strangely. He does not purr so bassily, typically as before, only somehow he is talking about the higher key. I have no idea what this is about.
Added after 43 [minutes]:
Well, I undressed again, folded and left the same, so that the microswitch pin, the dog's mace, broke off. Well, it works, it turns on and off, and the pressure is still gone. What is wrong ? You have to press it deeper, tap it, or what kind of devil. I slid into the resistance, without hammering.
Added after 38 [minutes]:
this diagram shows that there is one more element (12) from the center of the pump that can affect the operation of this control piston. Well, but can he influence the lack of pressure? In the meantime, could valves 3 and 13 be "ended"?
How can I check it? how to break the pump?



Added after 1 [hour] 40 [minutes]:

I split the pump. Valves look normal, but in turn how do I know what they should look like. For the peace of mind, after so many years of use, maybe it's worth replacing valves 3 and 13? Only, is there a reason for the lack of pressure? They are responsible for the pressure.
Any idea?

I see that, however, no one has an idea of what is, so I have nothing else but service.
today I have cut out the heads, I have blew all the channels with compressed air. No change. No pressure.

So the service responded and estimated the repair for PLN 500. Does not make sense.
Self-repair is the cost of parts:
6 seals 60 PLN (I found this price, normally 20)
two sets of valves - 57x2
relief valve, the one from which it started - PLN 120

engine bearings (I have already mentioned them once), say 50 PLN
The cost is PLN 350. Is there any sense? All components can easily be replaced outside the pressure valves. These are embedded quite deep, well, but you can probably pick it, clean the sockets and put in new silicone grease.
The new K5 is the cheapest PLN 959.

I had a similar problem in the 650M model which looks just like the pictures from the first post. I do not know how miraculously, but this white axis from the first photo connecting the dial with the micro switch probably shrinks because it did not reach the switch. I set it on, I did not mount the knobs and it works as it should. A strange mechanism.

leg

szym86 wrote:

. I do not know how miraculously, but this white axis from the first photo connecting the dial with a microswitch probably

And sometimes this spindle did not hang / lock up?

I had a new one. Karcher's service sang for 5 repairs, half of the new value, and dfo only for valves. They also tried to squeeze the bearings. I am writing with all my consciousness, because I recently exchanged, I have set up SKF and such bearings for years in this type of device. I still have the whole, so if someone is happy, I will pay for the flask and parcel