Here we have a Karcher Pressure washer K3.20, that was facing with a problem – low pressure. We decide to repair it at home, so we order a spare Cylinder Head from ebay. Here we gonna explain the procedure how we do replacement of the cylinder head.
First we need to remove the pistol and the handle assigned with the red arrows on the picture.
After that we have this.
After that need to remove the holder
Now we turn it from the back, there are screws that need to be removed as assigned on the picture.
After that we detach the front cover, but before that we detach the power cable and the hose for car wash shampoo.
Now the holder is removed and the pump can be removed from its position.
There are four screws on the top that need to be removed.
But first need to remove the plastic hoses. That is done by firs removing the claws as shown on the next pictures.
Don’t forget the wire for ground.
Now we gonna detach the cylinder head.
And we see the problem. The pistons that make the pressure are broken.
The nozzle is back in place and we begin to assemble the pump.
There is assigned on the picture how to place the cover.
After all the parts are in place and we can place the screws.
As we said before, all the screws must be tighten evenly.
After this the pump need to be placed in the plastic covers and it’s ready to roll. 🙂