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How do I remove the spill valve from my Karcher 620M?

Having read some of the questions and answers I realised that the problem with my Karcher 620M was a jammed spill valve.......and having taken the elbow with the microswitch off located the spill valve and discovered it was jammed in the up position. Try as I might I cannot remove the valve from its housing. Any one got any good ideas for getting this thing out? I guess it should just pull straight up.
Jeff Bish, January 2011
In my long experience of this annoying and persistent problem with the 620M, the spill valve sticks down, not up. To remove it without damaging the cylindrical finish on the top of the spindle screw, I use a short length of thick-walled copper tube so that I can grip the screw safely with long-handled pincers and pull the spill valve assembly either out, or simply exercise it until moving freely to the "up" position under spring pressure, depending how long it was since last stripped, cleaned and lubed with silicone grease (not lithium grease as suggested elsewhere, unless you want to destroy the "O" rings).

JOAT, January 2011
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