You know how important it is to keep your Graco 390 Paint Sprayer in good shape if you use it for home improvement projects. A well-kept Graco 390 can help you always do the job right, with smooth and professional results. This blog post will discuss the best ways to clean and maintain a Graco 390 paint sprayer, from preparing the equipment to putting it back together after a thorough cleaning. Get ready because taking good care of your Graco machine will pay off significantly.

How To Clean Graco 390 Paint Sprayer

Tools Required:

  • Clean buckets or other containers
  • Graco 390 cleaner
  • Warm water
  • Soft clothes or paper towels
  • Protective gloves and eyewear for safety
  • Old toothbrush to help reach into the tight areas of the sprayer
  • Compressed air (optional)
  • A brush with soft bristles (optional)

How To Clean Graco 390 Paint Sprayer

Start by getting the tools listed above that you will need to clean your Graco 390 paint sprayer. Ensure you wear protective gloves and eyewear for safety during the cleaning process.

Prepare the Cleaning Solution

Fill a clean bucket or other containers with warm water and Graco 390 cleaner according to the instructions on the bottle. Mix until thoroughly combined.

Remove Exterior Buildup

Use a soft cloth or paper towel dipped in the cleaning solution to wipe away any exterior buildup from your paint sprayer, such as dried paint or dirt. You can also use an old toothbrush to help reach into tight areas of the sprayer that are difficult to get with just a cloth.

Rinse Exterior

Once you have finished wiping away all residue, rinse off your paint sprayer with clean water and dry it thoroughly with another cloth or paper towel.

Clean Interior Components

To get the interior components of your paint sprayer clean, use a soft-bristled brush or compressed air to remove excess dirt or dust that has built up over time. Be sure not to press too hard with the brush, as you may damage the internal parts of the sprayer. Once finished, let the sprayer dry entirely before using it again.

Final Steps

Once everything is dried off, reassemble your Graco 390 paint sprayer and test it by running some paint through it to ensure it works properly. If there are problems with how it works, you should call an authorized service center to find out what to do.

These steps will help keep your Graco 390 paint sprayer in optimal working condition for years. Always wear protective gloves and eyewear when cleaning the sprayer and any other painting supplies you may be using.

How To Assemble the Graco 390 Paint Sprayer?

Graco 390 paint sprayers are an excellent choice for home renovation projects. But before you start your project, you must assemble the sprayer correctly. Here’s what you need to do:

Unpack the Contents:

Carefully remove the Graco 390 paint sprayer and all components from their packaging. Be sure to check that you have all of the pieces before proceeding with assembly.

Attach the Hose Fittings:

Attach the hose fittings by pushing them into the designated gun handle and sprayer body locations. Tighten any screws that may be necessary, but be careful not to over-tighten.

Connect the Air Supply Hose:

Connect one end of your air supply hose to your compressor and thread it through your Graco 390’s gun handle until it reaches its connection point on the sprayer body. Connect the other end of the hose to the connection point and hand-tighten it as necessary.

Install the Gun Filter:

The gun filter should be attached to the gun handle, just below the air supply connection point. This will help prevent debris and particles from getting into your paint sprayer system and clogging it up.

Attach the Spray Tip:

Attach the appropriate size spray tip by unscrewing the collar on top of the gun handle, inserting your chosen tip, and tightening up both sides of the collar securely with a wrench or similar tool.

Fill With Paint:

Finally, fill your Graco 390 paint sprayer with the paint of your choice, and you’re ready to go!

Now that you know how to assemble the Graco paint sprayer, it’s time to start spray painting! Be sure to follow all safety instructions when using any paint sprayer. And always wear protective gloves and eyewear, as well as a respiratory mask if recommended, for your safety. Happy Painting!

Frequently Asked Questions:

How often should I clean my Graco 390 paint sprayer?

It’s essential to clean your Graco 390 paint sprayer often to make sure it works well and gives you the best results when spraying. We recommend you clean the sprayer after each use or at least every other day if using it multiple days. This will help prevent material buildup that could clog the nozzle and reduce effectiveness.

What should I use to clean my Graco 390 paint sprayer?

We recommend cleaning your Graco 390 paint sprayer with water and mild detergent. Avoid harsh chemicals, as these can damage parts of the system. You may also choose to flush through some mineral spirits, but read all safety instructions before doing so.

How do I disassemble and clean my Graco 390 paint sprayer?

Unplug the power cord from the wall to disassemble and clean your Graco 390 paint sprayer. Then, release the pressure in the hose and separate it from the gun. Next, unscrew any filters or attachments on the front of the gun handle and set them on a flat surface. Once disconnected, you can soak parts of your sprayer in warm water with detergent to loosen any material buildup before rinsing everything off with cool running water. Finally, reattach all parts in their original positions and store them until ready for use.

Do I need to lubricate my Graco 390 paint sprayer after cleaning it?

When cleaning, it would help if you lubricate your Graco 390 paint sprayer with a light oil or silicone-based grease. This will help keep the moving parts of the sprayer functioning correctly and prevent corrosion or rust buildup over time. When applying lubricant, be careful not to use too much, as this can cause clogs or damage to other parts.


Finally, keeping your Graco 390 paint sprayer in good working order and lasting long requires proper and regular cleaning. The steps are simple, but use extreme caution when removing the filters and other internal components. If you take the time to clean your Graco 390 paint sprayer properly, it will keep working well with little trouble. If properly maintained, your Graco 390 paint sprayer will last for years.

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