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Pressure Washer Cylinder Pump Head Stock Number: ES538427

Genuine pare part for select models of Karcher pressure washers

Product Q&A

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Please could you confirm if this cylinder head kit contains the internal valve set - 3x white values & springs (per kit ES538419). I can see the other valves in the image (under the red clips).

By P J Smith - Huddersfield - 25 January 2018
  • Chris from eSpares
    Chris at eSpares says...

    the parts in ES538419 are not supplied with this part. We do not think they will be required when replacing this part.

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HI there i have this model and i have got problem with low water pressure and water is getting into the cylinder head. I was wondering what you would suggest?

By Ed - coventry - 27 November 2017
  • Dean from eSpares
    Dean at eSpares says...

    We believe it may be a leak so check the seals before suspecting anything else.

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By bay - - 27 June 2017
  • Dean from eSpares
    Dean at eSpares says...

    The cylinder head does have issues of cracking, it is worth taking it apart to check. Please check out our video on how to diagnose pressure washer pump problems www.youtube.com/watch?v=4WZgprLndhU

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There is a minute crack in the plastic 'bit' that feeds into the pressurised water outlet..thus spraying everywhere

By Vivian - Norfolk - 26 July 2014
  • Chris from eSpares
    Chris at eSpares says...

    In order for us to answer your question or source the exact part you require please provide us with the following information: Appliance make, model and serial number of your appliance. For further help visit the "Finding Model Numbers" page on our website here: http://www.espares.co.uk/findingmodelnumbers. Alternatively please copy and paste this link into your web browser.

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By mrpxd05 - - 12 August 2010
  • Rory from eSpares
    Rory at eSpares says...

    Hi, the white valve should fit in to the circular protrusion on the side with the three red parts. Hope this helps.

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Hi, we have a KB4040 which has suddenly started playing up. One minute it was OK then it started to run a bit like a car running out of fuel. It will start to fade then vroom and then fade. 20 or 30 seconds later it would do it again and the time inbetween got shorter and shorter and now it is doing it all the time. Looking online a forum (Tyresmoke) suggests the cylinder head is cracked. Would this be your thoughts, also? Would (stock No 538427) solve this problem or would I need other parts? The pump hasn't been dismantled yet. Many thanks

By Genealogist - Preston, Lancs - 30 May 2010
  • eSparesMalindi from eSpares
    eSparesMalindi at eSpares says...

    Unfortunately we cannot give out technical advice. Please contact Karcher or a technician for support with this problem.

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does a spring go in the middle is there any other bits to go in the middle

By jazzy1 - - 31 May 2009
  • Rory from eSpares
    Rory at eSpares says...

    Hi, I'll need your washer's product number to see what additional parts go in to this pump part - each model varies slightly. For help finding your number, check out this video: http://www.espares.co.uk/advice/pressure-washers/a/8/1172/how-to-find-a-karcher-pressure-washer-model-n.html

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if not is there a spares set that will. I think I need to replace the groved rings

By Grahan - - 17 May 2009
  • Rory from eSpares
    Rory at eSpares says...

    Hi Grahan, the pump part for your K300B is this one: http://www.espares.co.uk/part/pressure-washers/karcher/p/1315/877/0/0/538413/pressure-washer-cylinder-.html

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Pressure Washer Cylinder Pump Head

£24.55
(inc. VAT)
£24.55