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Old 05-20-2014, 04:55 PM   #1
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HELP!! ST700 airless


Hi everyone! I am new here and am really excited that I found you guys (and Ladies!). I have an ST700 Wagner airless sprayer that is about 30 years old. It worked fine until I tried to clean it this last fall. Now it is not working properly. When I turn it on it pressures up fine. after I pull the trigger and expend the pressure the machine will not pressure up. if I turn my knob to flush the machine bubbles come out of the paint can for a lil bit before it becomes a stream of water again. at this point if I turn the switch over to paint then the airless will pressure up fine. after pulling the trigger the scenario starts all over again.....Can anyone tell me what I did wrong?!! thanks in advance!

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Old 05-20-2014, 10:07 PM   #2
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HELP!! ST700 airless


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Originally Posted by mrjimmyc View Post
Hi everyone! I am new here and am really excited that I found you guys (and Ladies!). I have an ST700 Wagner airless sprayer that is about 30 years old. It worked fine until I tried to clean it this last fall. Now it is not working properly. When I turn it on it pressures up fine. after I pull the trigger and expend the pressure the machine will not pressure up. if I turn my knob to flush the machine bubbles come out of the paint can for a lil bit before it becomes a stream of water again. at this point if I turn the switch over to paint then the airless will pressure up fine. after pulling the trigger the scenario starts all over again.....Can anyone tell me what I did wrong?!! thanks in advance!
um…the knob you turn to flush the machine…is that your prime valve? …if so, are you priming your pump before filling and pressurizing the line?

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