Repair - Karcher k5 premium full control plus - pulsing not leaking
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- Опубліковано 2 чер 2020
- This is a repair video of Karcher k5 premium full control plus. Its problem was that when you release the gun trigger it begins pulsating between on and off (start/stop) stages but no leakages of water was seen, only sound of water flowing inside the machine. First suspect was valves, after replacement it didn't help, further tear down identified an ripped o-ring.
Additionally you get to see almost complete assembly of the pump itself :)
Some time stamps:
13:20 - installing of replacement valves
19:10 - real defect
21:50 - complete assembly
Sorry for a long video my PC or video editing software is constantly crashing when I try to edit a few fast forward scenes..
If you would like to share some support for the channel or pour a beer as a thank you for successful repair: paypal.me/LetsFixItGarage
You Sir are a Gentleman. I have had my machine back to Karcher under warranty 3 times for this fault and the repair only lasts a few months. Now it is out of warranty they want me to pay for the privilege!
Extremely thorough video on how step by step to find and fix an issue. Well done!
I have the same problem and your video guides a lot in dismantling and replacing spare parts. Thanks again
Very useful teardown video. I learned a lot - thank you 👍
Excellent video man! You should be proud with your effort. Great explanation!
Thanks!
thank you for the video. it helped me to solve the problems with mine....finally i can rest in peace...
Thanks! After repair machine needs work and not peace ;)
Thank you Sir ! Good video
Thanks for the video
Brilliant, very very helpful thanks again 👍
Thanks for your feedback and share the knowledge ;) we need to improve the "repair" thinking in people :)
Thanks for this video, can you explain how you extract the vlave show at 21 minutes ? Il can't pull it out ?
Thanks for your help
Thanks for the video 👍🏻
when you place the hose in on 35 mins do you have to twist that or insert straight? I'm having problems refitting with the retaining clip it just wont stay in?
Thank you!
@23:26 - the part in your hand is the part where I’m seeing water leak from when the mains water is turned on. Looks like it’s leaking out past the stem.
Molto bravo, sto avendo lo stesso problema con la k2, ma non sono così bravo nello smontaggio 30:47 e ho dovuto ricorrere alla assistenza Kärcher. Ad evitare di avanzare dei pezzi.
Hi, I also have a Karcher k5 that doesn't put pressure properly, it puts pressure properly for a few seconds after which it drops to the lowest pressure, the lance is full control with two batteries and numbered from 1 to 3 and as I said even more up, it goes on No. 3 at maximum pressure for a few seconds and then jumps to 1 at the lowest pressure, maybe you can help me a lot!
Thank you!
Hi thanks for the video very interesting indeed. Quick question for you got the same K5 pressure washer. Mine sometimes qhen plugged do nothing for maybe 5 mins and suddenly it work. They told me is a pressure valve but looking at your video Iam not sure if this is the 3 plastic valves with the spring or the large one goes on the side that you mentioned it has a damaged o ring. Some light on this willl be appreciated.Many thanks
Hi, it's quite some time when I repaired this model, usually I work with older models. but the three valves are inlet valves or high and low pressure valves don't remember correctly :) pressure valve is usually combined with the on/off switch. So according your description the pressure valve is getting stuck or jamed and needs cleaning. Usually this does the trick.
the white plastic part is a pressure backup ring
Hello, could you please tell me, how you did remove the valve with the broken o-ring at 20:42 min? Thank you for helping me :)
Sorry long time ago had this repair, don't remember for sure, but I think simply pulling with pliers..
hello Brother. I got the same issue pulsing and stalls and bugging noise as motor stops like capacitor issue, But when you pull the trigger it has full pressure. They are pain in the bumm this things.
Yes these kind off defects are hard to find out, a lot can be wrong.. but just take it apart maybe it's a simple o-ring as it was in my case..
Hi man good tips ! I have a problem like lot of People. On the remote + and - is reverse and the pressure washer is blocked on mix mode. An idea ?
I think about the black piece in your video here 31:33. Thx 🙏
It depends how did it got reversed, after reassembly? But in general I think you are on the right track I remember watching a video in Russian language that was talking something about being careful with it, as it can reverse the +/- but didn't had problems on my own with it so don't know the procedure to get it right.. sorry..
@@letsfixitgarage I found the problèm is located to the push button with blue wire. an orange plastic part allows to maintain the pusher. The orange part has cracked and the button does not move in the axis anymore. The karcher is blocked on mix mode. Part number : 6.645-999.3 the part has been updated that’s not the same ;)
@@Glyphosatemax nice job! Sadly a lot of parts in the 5 series is being manufactured from plastic these days.. older k5 were more reliable..
고맙습니다.
your welcome :)
Where did you buy the new piston with the plastic ring?
Oficial Karcher dealership they have all the part and with reasonable prices. At least here in Lithuania
Great video, has given me the the confidence to have a go and dismantle my machine. I have the exact same model, my problem is that all was working fine and then decided to drop all pressure but the motor was still running and no water leaks from pump. I tried purging air by leaving the machine off and running water through at tap pressure for 5mins to no effect. What happens now with water attached I turn the pump on and it just runs continuously and when I press the trigger on the lance the water comes out at the pressure from the tap. It seems to me that the pump is not generating pressure, would like to hear any suggestions to try and rectify this.
It could be something similar as in this video. Some defective o-ring or similar that lets the pressure inside the pump from high pressure zone to the low pressure zone...
9:51 with my machine the triangular black plastic center core was torn. I had this exact same issue as you described
Hola donde puedo conseguir el kit que de valvulas que tenias en la bolsita gracias y saludos desde mexico
Hi, got it from official Karcher dealer. Have to compliment Karcher for having amazing spare parts supply, is pricey, but for the luxury of repairing 10 year old machine it is totally worth it.
@@letsfixitgarage Thank you very much for your help
Hi, thanks for the video. I took mine apart. It's a crack pressure cover. I paid $40 at a garage sale. Sellers said it worked good. Liars. Should I repair it? $60 for part and I don't know if anything else wrong. Also not sure if I got water in the motor and motor oil.
It's difficult to say without inspecting it. But K5 have metal housing so usually it cracks only if it was left in freezing yemperature.. it could be that high pressure seals were damaged. Oil seal shouldn't be affected by the temperature if it was not worn out before that... But if you bought it second hand I would overhaul it anyway.. change both seals, inspect oil and so on..
@@letsfixitgarage thought about it but that would be at least $150 in parts plus time put in. A new k2000 is only $249. If parts were cheaper I would try it for fun.
K2 whole head will be from plastic k5 if taken care should hold much longer but in the end you are the one who decides. And I tend to not count my own time on these projects or I wouldn't start them at all :))
Is K5 having a fully metal pump head ..!!could u suggest a pressure washer?
Yes k5 traditionally has a metallic pump head. Although older models are full metal these new ones are with some kind of plastic moulding inside.. not sure regarding advantages (guessing that less buildup) and disadvantages of this design.. gues only time will tell. I would go with an older k5 less things to go bad.. but this one's really neat regarding low profile..
@@letsfixitgarage thanks for the update.
@@letsfixitgarage , no, there were two older models heads on K5, the first was with aluminium and black plastic molded on surface of aluminium to prevent corrosion and stone lime scale and the problem was that the high water pressure deformed black plastic cylinder walls from the outside to inward and narrowing the cylinder walls where the unloader by pass valve is moving (the same valve on your video where the rubber seal ring was broken), so the spring couldn't return the valve on high pressure position again and stuck on low pressure for detergent injecting.
After some time of this often deforming problem, Karcher started to manufacture the mold of pure aluminium head without plastic. The deforming wall problem was solved, but there was a new problem that the pure aluminium is oxidizing so they return back to combination of aluminium with plastic mold corrosion protection with enhanced design such on your K5 full control plus.
Forgot to mention the first design had inox unloader by pass valve and then when they started to make pure aluminium head to prevent galvanic corrosion between inox and aluminium, they started to produce of black plastic unloader by pass valve like on your video.
Thanks for detailed explanation! I worked on some pure aluminium ones like 520m and yes sometimes the buildup is crazy.. for that 7 series with bronze head is quite a thing.. And this was the first time I had opened a k5 with aluminium/plastic head so that's why the surprise :) thanks for explaining that there was even additional series of these plastic/metal heads..
@@letsfixitgarage , it seems I was wrong about your K5 full control head on video, it is pure aluminium I don't see black plastic layer cover protection, not even sure does it exist with black plastic layer K5 full control version, I just saw PDF animation version on spare part catalog.
I have to order new head for my old K5 because I have this plastic deformation problem and unloader bypass valve is jamming so before buying the new one I have done in workshop inox sleeve 2 millimeter wall thicknes, grind the old black plastic defective walls for 2 millimeters and press the new inox sleeve in the head and of course bored small hole on the inox wall for bypass water channel . The problem with jamming unloader bypass valve was solved and the device was finally switching between high pressure and low pressure (detergent injecting) fine, but there was a new problem, the water pressure is now not so good as it used to be and when using rotating flow mode on the gun, the motor starts and stops every 1-2 seconds, it is pulsating when the gun is on.
I disassembled my K5 again and the problem is in head, when I put my mouth on small triangle high pressure output channel and blow the air from my mouth I feel big resistance and output air where the gun hose should be connected is very bad and low when I normally clogged small holes with my fingers in unloader bypass valve and motor switch valve holes.
I think the problem is in the workshop when they grinded the defective plastic wall something went wrong, the plastic collapsed even more somewhere inside head and clogged narrowing the passage water flow.
This is early defective head design with plastic layer for K5: 9.037-277.0 then to eliminate this problem they redesign the head and made the pure aluminium head 9.001-800.0. The K5 full control head 9.002-463.0 and this I'll put on my old Karcher K5, when it works, I'll order other missing components to convert it to full control.
Salut,am și eu un Karcher k5 care nu mai baga presiune cum trebuie, baga presiune cum trebuie câteva secunde după care scade la cea mai mică presiune, lancea este full control cu doua baterii şi numerotată de la 1 la 3 și cum spuneam și mai sus,merge pe Nr 3 la presiune maxima câteva secunde şi după sare la 1 cea mai mică presiune, poate mă poți ajuta Ms mult!
When I took my pressure washer apart, a small plastic ball came towards me. Does it belong in a certain place, or does it not belong to the pressure washer at all?
Difficult to say.. if it came out from the pressurewasher I would say it belongs in.. it's difficult for something unneeded to get in as it has an inlet filter..
@@letsfixitgarageit happened to me: the cristal pipe was removed from the detergent holder ans the little plastic ball came out of this pipe. This ball acts as a one way valve for the detergent
Hello sir, can you tell me how much oil do i need to put for lubrication. When I opened mine K5 cilinder was full of oil and some water mixture due to broken head. Thx
You need to fill it so the plate would be covered in oil. It doesn't need to be full.
@@letsfixitgarageThank you very much for fast replay. I did as you said and I replaced old head part thats like in your video made from plastic but it was broken due to high pressure with new original part full alu from karcher and if doesnt fit correctly. Piston plastic has to much space beatween and cant even hold head and its leaking. I assume this piece is defective from factory when it was made they didnt pay attention to tolerances. Ill try to bring it back in official service where i bought it and try to replace. Hopefully they will accept this 🤞🏻
Good luck hope it will get sorted.. till now what I bought from Karcher it was always 100% fit. Strange what got wrong in your case..
I want to buy one - K4 home for 280 Euro or K5 home for 370 Euro. Maybe you know: What's the differences among K4 and K5 pumps ? Is it worth to go with K4 or better pay extra 100 Euro for K5 ? Cheers
Don't know all the difference but all the time K4 kad pump housing from plastic K5 aluminium. So K5 is much more robust but both of them are afraid of frost. So k5 is more robust and usually has better value if you would decide to sell it.
Bonjour,
Comment avez vous enlever le condensateur ? J'ai tiré très fort dessus pour l'extraire il ne venait pas !
it should come off by pulling another way is to open up the plastic case of controll board. it has wires with connectors that can be disconnected easily at that point.. although more work..
Hi. I have a similar issue with my k5 premium full control. The power only comes on when I twist the full control Lance to low then high again - then the power seems kick back on again. It stays on until I let go of the trigger. When I press the trigger - no power again until I twist the Lance from low to high again. Has anyone come across this problem ? Thanks !
Mine does exactly the same, took it Karcher, and judging from their response, they cannot identify the actual issue, except to say it could be the pump or the valves. Either way it may be cheaper to purchase another machine ... Not Karcher...
@@philip.aocallaghan4602 This problem is caused by a plastic bypass valve that gets stuck. Just detach the plastic pipe that connects pump head and motor cooling jacket (fastened to pump head with 3x 5mm hex head bolts) and pull out the valve (put the rod of the valve between vice or something, it is probably quite hard to pull it out). Then just grease the orings of the valve with thick silicone grease and put it all back together.
The same valve you can see in this video at 20:52
@@madisselgis6827 Thank you so much..for this information and video. I will try this fix on my machine shortly.
Labas .. pas mane pulsuoja kada tik naudoju snow foam!! Kal Gali patart Ka daryti? Karcher k5
Ačiū
Jei gerai supratau snow foam yra antgalis, originalus ar neaiškus? Toks jausmas kad per didelis slėgis susidaro ir dėl to atsijungia ir prasideda pulsavimas.. pradžiai pabandyk kitą priedą, kad išsiaiškint ar aparatas ar priedas kaltas..
@@letsfixitgarage jaigu uždedu nuo karhcer k2 seno aparato kuri kažkada turėjau, tada veikia, bet jis putų visiškai mažai man pučia.. o jai uždedu ta nauja putų Putekli tada jis putų kaip ir daug man pučia bet pulsuoja visada vienodų ritmų.. net nežinau ką ir daryti... Ačiū tau
Na tada problema puteklyje.. ji ir reikia žiūrėti.. pažiūrėk ar galima reguliuoti tarpą ar dar ką ant puteklio.. jis sudaro per didelį pasipriešinimą ir dėl to kercheris atsijungia..
can you link the parts
Not really.. I bought it at authorized service center that doesn't have a e shop. so I can only suggest you to google schematics of your concrete model and in exploded view you will find Karcher order numbers for parts you need. And that's what I like about Karcher, they are not cheap but they have great spare parts warehouse even for older models. as example www.ereplacementparts.com/karcher-k5740-pressure-washer-parts-c-33388_33389_205806.html good luck!
Hi! What kind of oil you used for this machine? I have same machine. But, there is no prrssure. I open it and the oil insidd is already bad. What kind of oil you used for this model?
Don't remember but I think it was simple 10w40 or similar.. In principle you need lubrication where pins touch the swivel plate and no water inside :) and it will be fine..
approximatif...
hello I have the same your pressure washer is mine has another problem I turn on the power 3 then after a few minutes it starts to drop in power, I write how the powers 3,2,3,2,1,2,3 vary and it continues like this .
in addition when the power goes down it starts to vibrate all over.
I checked the filter the lance I disassembled the machine and the pistons slide regularly. I reassembled everything worked for 3 minutes and then the problem started again.
What could it be? the motor capacitor?
I would first disassemble and clean complete pump unit. With all the pressure valves and so.. if you suspect the capacitor you can check it with a multimeter. It's +- limit is given on the capacitor.. one more thing to check is the motor bearings maybe they are at the end of their life and when it heats up it starts to vibrate.. not very likely but you never know..
Hello, greetings from Latvia, my karcher k5 (same as in video) started acting weard, couple of weeks ago when i turned it on no sign of life, i did let the water run trough it for 10 mins, started to work. Then next time i used it again dead, turned out that it was pulling air from somewhere, located that chemical holder nozzle was pulling air in and so i poured some water in the holder and it started working again for a couple of weeks, and now again dead, not turning on at all, water was running through it and again pulling air from that chemical holder nozzle so i clamped that hose off so no air can get in system but it still does not start, maybe something wrong with electrics, also how does it know when there is air in system so it does not turn on, is it the switch with blue wire or something? I hope you can help thanks.
Sorry I'm not a Karcher expert especially this new one.. this was my only experience with this new Karcher model..
Sveiki, gal žinote kas kontroliuoja karcher k5.200 variklio apsukas? Esmė, kad nuspaudus rankeną slėgis keliamas tarsi putų pistoletui, t.y mažomis apsukomis. Kadangi galva rankenos sukiojama ir ja galima reguliuoti norimą slėgį, ją atsukus ant min ir vėl ant max pasileidžia variklis maksimaliom apsukom ir pučia max slegi. Tik pistoletą atleidus ir vėl ijungus slėgis mažas ir apsukos mazos kol nepasuki galvos nuo max į min ir vėl max. Toks jausmas kad nesuveikia kazkoks apktovos daviklis ar panasiai. Galva plastikinė, vožtuvas sukilus slegiui varikli isjungia jei nenuspausta rankena, nuspasudi ir vel birbia mazomis apsukomis kol nepasukioji rankenos galo (veikiančiam irenginiu).
Sunku pasakyti.. anksčiau slėgis buvo kontroliuojamas on/off principu kur viską reguliavo hidraulinis slėgio jungiklis su naujaisiais mažai susidūręs..
I bought the same one 3 years ago, worked fine for a few times then started pulsating, fixed it and the worked a bit and then did the same, the Karcher repair shop said it doesn't work because my water has sand in it and it ruins the white plastic valves, that my be true but why my old 150€ black and decker pressure washer that has more than 10 years of use still works very well. Well I'll answer you, because Karcher products are crap, at least those for the consumer market
Difficult to say but yes usually Karcher is quite sensitive to bad water. Any chance on getting filter to catch the sand?..
Kindly tell your whatsapp. I want to send a video to identify the problem with my washer
Send it to email or a link to it. letsfixitgarage@gmail.com