Question about Garden
I have purchased a second hand Karcher 4040 pressure washer, after a few months of use the lance failed to osceralate the water around and just stays in one position.
Stripped down the head of the dirt blaster by unscrewing the shaft from the end nozzle(it was quite tight). Removed the white disc from the nozzle using pliers and then cleaned out the 4 holes in the disc. Under the disc is an assembly which houses a ball bearing. I noticed that the ball bearing did not protude beyond the recess which houses it. I PUT TWO SMALL FIBRE WASHERS IN THE RECESS THEN REPLACED THE BALL BEARING. THEN REPLACED THE WHITE DICSC. Noting that the ball bearing protrude by approx 1/16th of an inch.
Re-assembled and the dirt blaster now works perfectly
Posted on Jun 20, 2013
I fixed mine after it had exactly the same problem. Firstly I unscrewed the head assembly and cleaned out the holes with fuse wire (which did not change the problem but eliminated one possible cause) - I then noticed a single o-ring on the white plastic assembly in the nozzle itself - there was only one o-ring but two grooves to support o-rings. I moved the o-ring from the position it was in furthest from the nozzle to the position closest to the nozzle and the lance is now working beautifully.
Posted on Jan 08, 2012
The lance is either blocked or worn. Unscrew the end of the dirtblaster and ensure the is no dirt inside. If this does not work replace the lance assy.
Posted on Mar 06, 2009
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Posted on Jan 02, 2017
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