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please continue - I cannot afford to buy a new one and being in poor health need one for all sorts of jobs round the house and garden - it has been a good friend to me !!
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please carry on thank you for trying
Water flows through the unit? Motor come son, but no pressure increase? How long since it was used? Ar you prepared to remove the outer housing and go into the pump? The main valve, is likely stuck and needs to be freed up. It gets corrosion on it and sticks, then you get no pressure.Here is link to parts site, # XXXXX on page C is the valve.------http://www.ereplacementparts.com/karcher-310-19947200-pressure-washer-parts-c-33388_33389_33442.html
thank you for your help I will open it up and check the valve etc
have tried and oiled everything but still no pressure so must accept it's dead I suppose. thanks for your help anyway