karcher 520M - Not Switching On - Sticking Valve Issue Solved 

Thank you for the most practical and the sensible video, my K5 85M has the same mechanism but slightly different looking. You are the only one who made a practical video. Thanks to you now I have pressure washer that is working. I was about to throw it out when I lost pressure after repairing the on off switch.

Thanak you Stephen, this is the most sensible, practical and logical video I came across to repair my K5 85M. I was about to throw it out after repairing the on off switch. I modified the on off switch, but I found there was no pressure when I turned it on. I read about the bypass valve but your video is most comprehensive in terms of reconditioning. I have one comment about the video where at times the camera was not on the subject, but it is easy enough to visualise what is happening . Thank you again.

same for a HD5/11c - thanks buddy saved me a lot of agro trying to fix my mum's pressure washer.

Danke für dein Video , Durch deinen Tip läuft mein Kärcher wieder. Thanks for the great Video

Just followed your instructions for my Karcher K5.85. The repair shop said that they could not repair my pressure cleaner because parts were no longer available. Cost me $40 for them to tell me this, after they broke it down to investigate. I was looking at buying a new one and spending $750 on a Karcher K7 Compact. Hopefully I will get many more years out of my K5.85. Thanks for your great video.

It took just an hour to fix my 520M. Great video and brilliantly presented. Thank you very much.

I found the video excellent and it has helped me to retu my machine to a fully functional jet washer. A little tip I picked up from elsewhere is to pour some antifreeze into the inlet and jut switch it on and off, the antifreeze will lubricate those hidden troublesome parts and help prevent the valve from sticking. I've been using this tip for many years and all my jet washers remain fully functional.

Grazieeee, è proprio quello che ha smesso di dare pressione quando stringo la lancia. L'interruttore io lo ho eliminato perché mi si era rotta la manopola meccanica. Avevo gia smontato quella valvola ma non sapevo che doveva fare tac tac a premere. La mia e' una 520m del 1978, uguale, ha smesso da poco di funzionare. Grazie tante.

Great video. Thanks from Downunder for the excellent advice and demonstration Stephen! Well done. I 'm impressed with your one-handedness!

I owe you a beer. The 520 is similar to my K695 which refused to start. I followed the same steps as your video and was able to access the sticking valve. I didn't have to remove it as I was able to unjam it with spray grease, while operating it. It even works better than before :-). Thanks. 😁

Absolutely brilliant video for this job. Every stage crystal clear.

Hurrah. My Kärcher 520M workshop again. Thank you for your great video

Thanks so much for your excellent video. I fixed my old Karcher K6.50 by cleaning/lubricating the bypass valve exactly as you described. Initially it did not work but this was because hadn't pushed the valve all the way down into the casing before replacing the holding cover. Great idea by the way to use an M5 bolt to remove the valve! My problem wasn't that the machine did not turn on but that there was no pressure in the lance the second time the trigger was pressed; I then had to reduce the pressure setting on the lance or remove it to get pressure again (and the same thing would happen the next time I released the trigger). Great idea by the way to use an M5 bolt to remove the valve!

I had exactly the same problem. Your video enabled me to fix it. Many thanks.

Well done, top man. This is what the internet is for.

Many thanks for producing this video as the stuck valve is my machines problem. What would we do without RU-vid to help us!

Brilliant video and it has worked. Many thanks for posting!

Brilliant, thank you. Just saved me buying a new one!

Great video Worked for me Thanks

Very helpful especailly with the Norn Iron accect Ken [Pretoria].

Grear stuff Stephen, many thanks. You seem very knowledgeable about this washer... Mine is working great now apart from when using a patio cleaner attachment (tried a few) and it keeps cutting out/on/out/on. With the cover off it looks like this valve keeps closing (due to too much pressure or too sensitive). Any ideas?

Stephen, great video. Thanks. If the motor continues to run after you connect to the water, does that mean the valve is stuck in the on position? Low water pressure? And would You know what the remedy for that would be?

Hi, great video. I have a Karcher K6.50 pressure washer which is not working properly much like in your description. I just wonder if the stop/start valve is the same as the unloader valve or are they different things altogether?

Very good

Bonjour j'ai eu un problème avec l'interrupteur de marche arrêt et j'ai beau remonter correctement il ne veux pas fonctionner et je je ne comprends pas le système que Karcher a inventé. Si je n'y arrive pas je vais coller la lamelle de contact et faire marcher le Karcher avec la prise .qu'en pensez vous ?

very comprehensive vid. i managed to remove the spill valve, clean it and the port as best i could and it did work without water on, water on and it stopped. the spring return spill valve seemed very stiff, more so than the one in the vid. is it worth risking £20 for a replacement valve of just scrap it?

Help please , can’t get past removing the main outer housing , my 550 my has a switch , part no 5.321-618.0, it has to be removed to remove the housing , do you know how to remove it ?

Brilliant video but valve is slightly different , I could undo the plastic plunger to put the M5 in, I mange to get it off eventually but it opened up the valve mech and I couldn’t get the valve out 🤷🏼‍♂️

Thanks for the vid. I have got to the point of uncovering the spill valve. My machine looks identical to yours apart from valve itself. mine is yellow & blue plastic and a different design. What is the part code for your machine pls? mine is a 1.069-923 but there appear to be several 520m versions but I guess internals are pretty much the same. Thing is, a valve for mine is £43. A valve for a -931 is £19. But two other www i have been to suggests they use the same part...even though design is different. Possible maybe just by year. for £19 worth a fix but at £42 plus post...borderline. tnx G

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Hi. Is this the valve that regulates the pressure, by moving as the trigger on the handle is activated ?

Ok, but the repeated "eeerm" is a little annoying!