Question about Alfred Karcher K255 Electric Pressure Washer
Karcher 2.35d is our model we have just purchased a karcher T300 plus, patio cleaner, we do not know how to attach this to the jet wash, one problem may be that we can not release the spray lanch from the triger gun is there a way to do this and then do you think the models we have will fit together
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Posted on Jan 02, 2017
SOURCE: no pressure on certain settings
It is not clear what type of lance or nozzel you have. You said that the machine works fine with the circulating water jet(the turbo). So it seems the machine is fine. I do sometimes service variable nozzels and variable lances. But the best solution is to replace nozzels and variable nozzles and lances with new ones. Regarding the fan spray setting it could have no pressure because it might be in the chemical setting. The chemical setting lets out a fan shape flow of water, but with less pressure. The chemical system only works on low pressure in domestic washers, that is why it needs a low pressure flat spray. The pencil jet has 2 jets comming out because if it is a lance or nozzel with ball bearings, these ball bearings must have stuck in a wrong position. Also 2 jets can come out, due to a damaged nozzel hole.
Altogether, the best advice is to buy a new nozzel or lance...which ever your machine uses. All Karcher machines have their own specific nozzels, lances and high pressure hoses. You cannot change these from one model to another.
Posted on Apr 29, 2009
SOURCE: Karcher K 3.68 M operation
These units have pressure valves that automatically turn off the pump once the pressure is high enough. The pressure switches do fail and sometimes stick and act as you've described.
Posted on May 07, 2009
you have to lower the pressure at the lance for the detergent to be drawn into the hose. It works on a venturi principle.
on the lance you will have to twist or pull back the end for it to go into low pressure mode.
the easiest way to check it is working is to take out the lance extension , the bit that fits into the trigger on a bayonet fitting. run the machine and see if it then draws in detergent.
If it doesnt draw detergent then look to see if there is a detergent valve fitted to the filter that goes into the bottle and check that it is fully open. sometimes ther is a non return valve fitted into the filter too.
it could be that this non return valve has stuck. A poke with a bit of stiff wire should free it off its seat if it is that problem.
hope this helps a little
Posted on Jul 18, 2009
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