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Will not switch on karcher 520M, have changed fuse

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You have to see if you are getting power to the switch with a volt meter you should be getting 110 volts.

Posted on Mar 20, 2011

  • stevekitcher Mar 20, 2011

    done that already

  • Tim Venetis Mar 20, 2011

    Somehow if you can get to the motor shaft make sure it is not seized up, it should turn easy. Check the brushes of the motor also they would be under screw caps.

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Posted on Jan 02, 2017

  • 46 Answers

SOURCE: karcher 520m oil leak

small engine shop should be able to obtain the proper gasket for you.....oil 20 weight fill untill you can see it at the bottom of the threads at the whole you pour it into!

Posted on May 25, 2009

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The solution is very simple. All you have to do is change the spill valve.
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I had the same problem - good water inlet pressure, no output pressure, even though the lance and handle seemed to be clear and working find.
I found that the electrical switch wasn't being operated correctly by the spill valve and wasn't turning the motor on/off correctly.
Inside the plastic electrical box there is a small white device that presses against the micro switch assembly. Carefully adjust the allen screw perhaps 1/4 turn out or 1/4 turn in to obtain correct operation of the microswitch - you will hear the micro switch clicking in and out when re-assembled. I'm sure they must have a rig to check correct positioning of this screw in the factory!
Hope it helps - mine is working find now and saved me buying another!

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