Often asked: How To Setup And Clean A Graco 390 Airless Paint Sprayer?

Can you run paint thinner through a paint sprayer?

Often one can run some lacquer thinner through the pump for awhile and get out most of the old dried debris if the sprayer does not have too much in it. If your sprayer has a flexible intake tube, flex it, move it around while running the thinner through it to try to dislodge the dried material inside it.

Can I leave paint in Graco sprayer overnight?

Never leave it pressurised. But you can leave it overnight leaving the gun and intake tube in a bucket of water. Moving the airless a 3/4 inch cap nut fits the end of the intake tube and find those roller wet bags from d.d convenient to put over it so paint doesn’t go everywhere as I usually clean it at home.

How long can you leave paint in a Graco sprayer?

Short 3 days – 3 months This is probably the most common storage method for most airless paint sprayers. Most painting professionals and contractors fall into this time span. Fresh, clean mineral spirits is considered a storage fluid for this time span, use it or another pump preserver such as Graco Pump Armor.

Do I need to thin paint for airless sprayer?

They’re extremely viscous, so whenever you spray them with a handheld, HVLP, or small airless sprayer, you need to thin them down. That’s true when you’re using anything other than a big airless unit. If you’re using a handheld or HVLP system to paint, you’re probably going to have to use as much as 20-30% water.

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Why does my airless paint sprayer leaving streaks?

The main causes of streaks and disturbances in the spray pattern when using Airless devices are: Pressure set too low. Nozzle worn. Material supply disrupted (eg clogged filters)

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