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dawsonwilliamAug 5, 2025
Why does my Graco True Airless ProLTS 190 Paint Sprayer run but not prime?
- TTina BennettAug 6, 2025
If your Graco Paint Sprayer runs but the pump doesn't prime or loses prime while in use, it could be due to several reasons. First, ensure the Prime/Spray valve is in the PRIME position until paint exits the drain tube. Check if the inlet strainer is clogged or the suction tube isn't immersed in paint; clean the strainer and ensure the tube is fully immersed. Also, the inlet valve ball might be stuck or dirty; try dislodging it with an Allen wrench or power flushing the sprayer. Thick paint can also cause this issue; try momentarily turning the ON/OFF switch off and on. Inspect the suction tube for leaks, and clean the outlet valve if it's stuck or dirty. Finally, strain the paint to remove any debris.