Readers ask: How To Repack 390 Graco Paint Sprayer?

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.”

Why is my Graco paint sprayer spitting?

Spray guns spit when air is being introduced into the fluid outside of at the air cap. A loose fluid nozzle does not properly seat in the tip of the spray gun and causes air to enter the fluid supply resulting in spitting.

Why is my paint sprayer leaking?

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.

How do I get a smooth finish with a paint sprayer?

Just wait till the paint is dry and lightly sand it with a fine grit sanding block to smooth it over. Paint over it again and you should be good to go! Here’s a quick video to demonstrate how I spray paint and get a flawless finish every time.

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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.

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