Kärcher Home & Garden Online Help
Welcome to the official online help resource for Kärcher Home & Garden products sold in the USA. Below are several channels of support including how to buy spare parts, locate a service center in your area, register your product online or contact our customer care team online. You also can find answers to many common issues by typing your question below or clicking the Knowledgebase link. We greatly appreciate your business and look forward to helping you make the most of your Kärcher product!
Why does my gas machine have low pressure unless I remove my nozzles and reattach?
Gas Machines Only
This can be caused by a dirty or sticking unloader valve.
This valve may be sticking in place and usually needs to be cleaned and lubricated with lithium grease. The location of the unloader valve varies on our pumps, but it is always located on the brass pump head. Be sure not to remove the bolts that connect the head of the pump to the transmission housing. Usually the unloader valve can be found under the black plastic cap. Though if your machine does not have this cap, it is located under the hexagonal nut closest to the transmission housing. For machines with a pressure regulator, it is located under the pressure dial.
Once you have removed the unloader, you want to inspect it to be sure that the o-rings and spring are in good shape. If there are any mineral deposits on the unloader or in the hole it sits in, you will want to clean these up with a little vinegar and a wire brush. Then, apply a small amount of lithium grease to the top o-ring on the unloader and reassemble the pump.
You can contact one of these dealers/distributors for parts, diagrams, assistance or an estimate for repair:
R. J. Bowers - phone: 800-383-6584, web: www.rjbowers.com.
You can also contact a local service center by going to our Service Center Locator at: http://www.karcherresidential.com/us/Service/showlocator.htm