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Description

What does the head pump do for the pressure washer?

When the pressure washer is powered on, the head pump uses an internal mechanism to create a high-pressure stream of water. It effectively removes dirt, grime, and other debris from surfaces. 

The head pump pressurizes the water flow and allows it to be delivered with force through the spray nozzle or lance. This pressure enables efficient cleaning of a wide range of surfaces, including driveways, vehicles, patio furniture, and more.

What causes pressure washer head pump failure?

If you're pushing your pressure washer to the limits with prolonged and heavy-duty use, it can put a strain on the pump and eventually lead to failure. Skipping regular maintenance tasks like cleaning, lubricating, and inspecting the pump can also cause issues. 

Be cautious about using a water supply that's contaminated with debris or chemicals as they can clog the pump or damage its internal parts. 

Over time, wear and tear is inevitable, especially with all that high-pressure action. 

Is it a genuine spare part?

This head pump set by Karcher is a genuine pressure washer replacement part. Your pressure washer can work good-as-new in cleaning surfaces. 

Manufacturers Part Number:

  • 9.002-552.0

Alternative Part Numbers:

  • 02552.0
  • 02-552.0
  • 9.001-999.0
  • 90019990

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Safety note:

Warning: Always unplug any appliance from the electricity supply before carrying out any work or testing on it.

Latest Product Review(s)

Read All Reviews
7 Customer Review(s)

replacement part

Ordered this part as the old one was leaking and it fit perfectly. The pressure washer is as good as new now. It was easy to fit. A great replacement product.

By john rushton - dudley
13th Mar 2024

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Solid replacement part

Like most other posters, I replaced the pump head on my K4 pressure washer. The part was a perfect fit and worked fine. Replacing the head was quite fiddly though and the pump head is very well secured into the pump housing using 4 hex bolts. That said, with the right tools, and some patience, it all went together perfect and took about 30 minutes. Re-assembly was not too difficult and it all worked fine. The pressure washer now works properly too, which is great!

By Morgan Conlon - Broadstone
30th Nov 2023

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Fixed k4

This fixed my k4 low pressure problem, my karchet is back to high pressure.

By Ds - Northwich
19th Sep 2023

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Great product

Good quality product that fits perfectly - and solved my leaky problem.

By John Knight - Lavenham
1st Aug 2023

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Marcher cylinder head

Saved a load of money, easy to fit, great delivery, good quality, definitely recommend this product.

By Robert Bathgate - Stafford
3rd May 2023

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Part was perfect but didn't fix the issue

No worries at all with the part itself but it unfortunately didn't fix the low pressure issue I was having. Bought a new Karcher in the end.

By Lee Bushen - Surrey
20th Mar 2023

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Power wash parts

Had a problem with my pressure washer went to my local official dealer had the part would not fit took it back the found ransomespares online sent for the part it was a lot cheaper and it was the original part fitted it worked first time it was easy to order and sent to me very quickly I will use the firm again and recommend them to anyone looking for great service and the right parts first time we’ll pleased.

By Barry stacey - Neath
5th Jul 2021

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Questions And Answers

1 Answer(s)
Hello, will this item fit my Karcher K4.600 pressure washer?
By James - Winchester UK - 06/04/2020
Hi James, please fill out a part enquiry and include the TYP number from the pressure washer beginning with a 1 so we can look in to this for you.
By Jordan - Staff Member
1 Answer(s)
My K4 is a Premium Ecologic model no. 1.180-661.0. Which cylinder head pump set will be suitable please? Regards,
By Richard - Thatcham, Berks - 24/06/2020
Hi Richard, the cylinder head for your model is RS823023.
By Jordan - Staff Member
1 Answer(s)
Hi I am trying to source a replacement cylinder head pump set for my K4 SILENT ED - 1.637-357.0, could you advise which specific part I need?
By Paul - Yarm - 28/02/2021
Hi Paul, I can confirm this is the correct cylinder head for your model.
By Jordan - Staff Member
1 Answer(s)
Does this part come complete with seals and “0” rings?
By Andrew - Chessington - 16/03/2021
Hi Andrew, I can confirm this has the 3 o-ring seals and the triangle seal.
By Jordan - Staff Member
1 Answer(s)
Does it come with the valve set and springs inside the pump?
By Paul - Derby. - 25/03/2021
Hi Paul, please submit a part enquiry with the TYP number from the bottom of the pressure washer so we can confirm.
By Jordan - Staff Member

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