Hello!
My Kärcher K4 Compact Pressure Washer is pulsing like this:
The output pressure is low. There are no visible leaks.

I replaced the pistons seals, then the head . Nothing changed.
I am puzzled. Please, advice. What could cause the problem?

---

Another question:
Where and how does this

go?
Is it like this

or like this
.

Where does the spring go?

Wow, that is a strange sound. Have you tried the Karcher site?
www.karcher-help.com/index.php?/Knowledg...ssure-washer-surging