Most detergent injectors work by the venturi system. That is that the detergent is drawn into the stream by the forward flow of the water thru a very narrow port after the water passes thru the pump. This system works best when the pressure at the tip of the wand is low. Trying using a very large tip to draw in and apply the detergent, then remove injector and rinse with high pressure. Not good for the pump but to apply soap reliably under high pressure the soap needs to be injected through the intake of the pump. enjoy
Just check the machine for soap with the high pressure hose disconnected first, if soap comes through then the problem is with the hose gun or lance nozzles.
if no soap still when disconnecting the hose, then the ball bearing will be stuck in the house of the soap valve , take the soap pipe off and push the ball bearing with a paper clip or thin object.
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This unit has a Faip pump on the unit, no water should come out the chemical injector. The chemical injector can be closed off with no problem by installing a plug where the chemical injector hose bard is currently located. You can also replace the chemical injector, here is a link to view the part. www.allpartsinc.com/ProductDesc.aspx?code=KTRI91351
Detergent tanks will only draw at low pressure. Switching to low-pressure is done is several different ways with different makes/models. Some pressure nozzles are push/pull, some are twist and some just have a quick coupling and you have to keep up with a low pressure tip (usually colored black).
If it will not draw at low presser, it is either stopped up with debres, or the check ball inside the injector is stuck. The injector is the little device that is just before the outlet where the pressure hose hooks up. These always have a small metal ball, held in place with a tiny spring. This ball is there to prevent pressurized water from shooting back into the detergent tank. The ball and seat that it presses against can get stuck together with old detergent residues, calcified deposits from the water or even rust.
Use a small crescent wrench to take it apart -- or if you prefer, find the right size box end/open end (metric) wrench. Be very cautious as it comes apart because that little spring can leap out and they are hard to find. I hope this is helpful to you. If it is, please take a sec to rate me. Thanks! Don
To the right of the Brass fitting where your garden hose attaches there is a small round plastic cover piece, pull on that and it will pull out a clear tube with it which goes into any container containing your detergent, it will pull the detergent as you use the pressure washer. Push the tube back in after you are done using it. You can also buy a replacement detergent bottle for other pressure washers if you wanted to.
First check the intake line, filter and the brass fitting on the pump for obstructions. It clear it's usually because you are using a high pressure tip on the gun while trying to spray detergent. The only way the system can pull the detergent into the water stream is if you are using a soap tip (usually black) on the gun.
If you still have an issue the problem is going to be in the chemical valve on the pump, there are two different styles they have on this type of machine, look at the links below on directions on how to repair your chemical valve.