4.764-192.0 DirtBlaster Rotary Nozzle

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

The Karcher Dirtblaster lance has a rotating pencil jet which blasts rotating water at high pressure thus giving up to 50% greater cleaning power.
Try turning off the pump and holding the trigger open for a few moments, before turning it back on. If this does not fix the problem, Check the water supply tap is open and the inlet valve is not blocked. Check if the nozzle on the lance is blocked, you could also try a new lance nozzle.
If the machine is pulsing whilst in use, it may be that the accessory you are using has a blockage. Clear by soaking the accessory in warm soapy water and then rinsing out under the tap.
It Can Harm The Unit

Without water to cool and lubricate it, the pump will work harder than it should, causing it to wear down quickly. This can happen even with just a few seconds of running the pressure washer without the water being turned on. However, the pump is not the only part that takes damage.

K 3 Power Control pressure washer with Power Control spray gun and lances. Use the Kärcher app for practical tips for efficient cleaning results. Made in Germany.
Locate the chemical/detergent intake and clean it thoroughly with water. Make sure any residue or buildup is rinsed clean and the water running out of the intake is clear. Wash away dirt and grime from the inside of the pressure washer to prevent any erratic behavior while it`s in use.
PLEASE NOTE: You should always press the RESET button on the GFCI before using the pressure washer.
Air can become trapped in your pump, and this needs a quick fix. Simply turn off your pressure washer and disconnect the hose. Keep your garden hose attached and allow water to run through it for 20-30 seconds. Turn off your garden hose and reassemble.
The electronic pressure switch automatically switches the pump on and off again on the pressure side as required. If there is no water running through the pump on the suction side, e.g. if the water tank is empty, the dry-run protection protects the pump against damage and automatically switches it off.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Karcher model 4000G does not have any pressure. what part do I need to fix it?
ANSWER : Take it apart and check the valves and seals

No high pressure. has been a consistant problem for a while. Was able to get high pressure to “kick-in” before by removing nozzle, squeezing trigger to “prime” high pressure, then quickly put nozzle back in then it would work. now it doesn’t work at all.
ANSWER : See this link to fix the problem

Karcher 4.91 checked fuse that is ok but no power
ANSWER : Check and see if you are getting power to the on/off swith. These switches have been known to go bad. Also, check the Ground fault breaker in the plug. Let me know how you make out.

Hi, I have a Karcher 3.99. It’s going funny. When
ANSWER : Your internal sdeals have gone bad and need to be replaced. they sell kits for these that are inexpensive and the repair is usually pretty easily done

No water pressure from unit – Karcher G 3050 OHR Gas Pressure Washer
ANSWER : Check inside the pump fro sticking valves

I have a karcher 2.o1 pressure washer does not work when i turn the water on, if i turn the water off it works, cant figure it help , help please
ANSWER : Please try without the high pressure lance on. If this works then you may have a blocked jet in the lance.

My Karcher 2.36 is leaking at the inlet point can someone tell me how to fix it
ANSWER : This sounds like the o-ring inside the end of the high pressure hose could be damaged and is in need of replacing. If this is not the case you may need to have the inlet replaced.

Water is leaking from under the chrome piece inside my Karcher 3.68m pressure washer. Hose intake and outlet look good. Any sugeestions.
ANSWER : Plastic Pump Manifold is cracked.

Can be replace at a local Karcher Service Center,
or if you are mechanically handy.
Replacement Manifold Complete, is available from www.karcher.com.

If it is under 1 year old, and under warranty Karcher will replace if you have a Receipt proof of purchase.