FAQ: How To Rebuild Gayco Paint Sprayer Pump 395?

What is repacking a paint sprayer?

Daily maintenance of your paint sprayers means, first and foremost, cleanup after a paint job. Paint is abrasive, and your sprayer’s parts will degenerate with use. So be prepared to replace them. The round polyethylene seals are called “packing,” and replacing them is known as “repacking.”

How long can I leave paint in my 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.

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 you spray oil-based paint with an airless sprayer?

Yes, you can spray oil-based paint with an airless sprayer. Airless sprayers pump paints at about 3,000 PSI through a tiny hole in the gun’s tip. The tip on the spray gun breaks up the paint evenly into a different pattern of tiny droplets. It sprays paint twice as fast as using a roller, brush, or am HVLP sprayer.

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What would cause a paint sprayer to not prime?

If the siphon hose has a hole in it or is not tightly secured to the airless sprayer the system may not be sealed and as a result, may suck air in while trying to pick up material. This can lead to the system not pressurizing well.

Why is my Graco sprayer not working?

Chances are the spray tip is clogged. Turn the spray tip 180 degrees to the unclog position. Then, aim the spray gun into a bucket and pull the trigger for one second to blast out the clog. Turn the spray tip back to the spray position and get back to the job.

What would you do if your paint does not spray from your gun or comes out blotchy?

If your paint gun is not spraying paint at all, it’s most likely due to a clog either in the air vent hole or the hose. Clean any dried paint with a toothpick, and use a cleaning solvent to clear any remaining gunk. If you’ve cleaned your paint gun and find that it still isn’t spraying, take a look at the air supply.

Why does my Graco spray gun leak?

The spray gun is leaking from the Nozzle This occurs when the Needle Packing Nut is too tight, compressing the Needle Packing too tightly around the Needle. This occurs when the Needle Packing nut is too loose. Remember that the needle packing must be tight enough to prevent any leakage of paint material.

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