Thread: Pulsating pw
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Old 10-01-2018, 09:55 PM   #14
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Originally Posted by Vossman View Post
I have the same machine (C120.3), mine has been doing it for about 12 months, my sons (same machine) did it also before it packed up, not bad though it has lasted about 5 years. Time to seek another one for me.
Do a google search on this problem and many people get this with a Nilfisk, not really any solutions.
The reason it's doing this because it's losing pressure, usually because of a leak somewhere. The most common culprit is the O ring on the hose end that connects to the gun. Mine (also a C120.3) did this and it was an easy fix that sorted the issue out completely. If this isn't the problem then as others have said it's probably one of the other O rings so just buy the kit and start replacing them all.

Last edited by neilmcl; 10-01-2018 at 09:58 PM.
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