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Operational Manuals are accessible through the links listed below. Proper operation will ensure your sprayer performs well for many years.

Get the most out of your Graco equipment by following all manufacturer recommended steps regarding:

  • Safety
  • Setup
  • Operation
  • Cleanup
  • Troubleshooting

Frequently Asked Questions

At Graco, we do our best to answer our customers' product-related questions in an information and easy to understand manner. Below are some frequently asked questions of our customer service and technical service departments. We also offer more product-specific operational information on each of the product pages.

If you still have questions regarding your Graco products, please contact Customer Service for help with your products.

Graco repair parts can be purchased through one of the many service repair centers. Graco does not sell parts direct.

To locate an authorized service center for repair, maintenence or parts for your sprayer, enter your zip code in the Distributor Locator.

Graco Distributor Locator

Or call 888-541-9788 to find a servicing distributor near you.

Try these steps:

  • Make sure the siphon tube/strainer are completely immersed in the paint.
  • Remove the strainer and connect a garden hose to the siphon tube. Run water through for a minute or two then try the paint again.
  • Remove the inlet valve to clean. Be sure not to lose the inlet ball (some models have a spring as well).
  • Remove the outlet valve to clean.

There are two variables that must be selected when picking a spray tip. One is the width of the spray pattern and the other is the size of the hole in the tip.

Pattern width depends on what object is being sprayed. The wider the surface being sprayed, the wider the tip that should be chosen.

The type of material being sprayed will determine the required hole size in thousands of an inch. Use smaller orifice sizes for lower viscosity materials such as stains and lacquers. Larger orifice sizes are best for heavier coatings like latexes or oil-based paints. The easiest way to determine the best hole size is to ask the material manufacturer, because they have tested their product and know what size works best. If this is not possible, use our online Spray Tip Selector tool.

Visit our Projects page for videos and instruction on how to use a paint sprayer. We also have an excellent guide with a complete overview of airless equipment, spraying techniques and safety issues: The Basics of Airless Spraying

Listed below are the possible sprayer settings or conditions that could cause the sprayer not to prime. They are listed in order of the easiest to correct or the most likely to occur to those requiring more complicated corrections to make or unlikely to happen.

  1. The Spray/Prime valve should be set at PRIME. The arrow on the handle should be pointing down.
  2. Is the inlet screen or suction tube clogged? Clean debris off inlet screen and make sure the suction tube is at the bottom of the paint pail so the filter is covered with paint. Make sure the protective plastic cap or bag that covers the filter screen on new sprayers has been removed and that the siphon hose is not kinked.
  3. Is the inlet valve check ball stuck? Place the smaller diameter drain hose into a waste pail and tap the side of the inlet check valve with a tool while the sprayer is stroking. The inlet check valve is the large hex shaped fitting that the larger diameter suction hose is connected to. If this does not free up the ball, remove the inlet tube and place a pencil, eraser end first, into the inlet valve housing to loosen the ball.
  4. Is the outlet valve check ball stuck? Remove the paint hose from the sprayer and unscrew the fitting that the paint hose was attached to. This fitting is the outlet valve. Gently nudge the ball inside the valve assembly with a screwdriver to loosen the ball. Screw the outlet valve back into the pump.
  5. Make sure the drain line is not blocked so the sprayer can prime. Power Flush your sprayer with water if you are spraying latex paint; pass about one gallon of water per minute using an attached garden hose. Check the diffuser, drain hose, or pump housing to clear any dried paint if the water flow is less. Power Flushing instructions are in the Quick Guide if you are not familiar with the process.
  6. The material may be too thick. This sprayer is not intended to spray roofing materials, block fillers, or materials thicker than a latex paint. Even 100% acrylic latex paints may have to be thinned when using a sprayer smaller than the ProX9.

Check the following three possiblities:

  1. The inlet or outlet check valve is stuck open. Shut the sprayer off, un-plug the electric cord, rotate the prime/spray valve handle down to relieve any pressure in the sprayer, and remove the blue paint hose from the sprayer. Unscrew the inlet and outlet check valves. Clean the ball and seat of each valve of all debris and inspect to insure ball is loose and can sit tightly on the seat. Inspect the o-ring around the valve housing for damage and replace if necessary. Screw the valve back into the pump and securely attach the hose.
  2. Leaky joint or damaged suction hose will allow air into the sprayer. Inspect suction hose for leaks, tighten or replace if necessary.
  3. Spray/Prime valve is stuck open or leaks. Repair or replace Spray/Prime valve. See your service center.

Magnum sprayers do not require packing nut adjustments. If you own a Graco Pro210ES, it's a good practice to check the packing nut on a weekly basis and slightly tighten it if necessary. Paint visible in the wet cup or on the rod surface is an indication that paint is starting to pass by the throat packing, and that the packing nut needs to be tightened. Depending on the style, put a flat-blade screwdriver or punch on the head of the packing nut and tap it lightly with a hammer. Tighten just enough to stop any paint leakage, DO NOT over-tighten. New or repacked pumps generally need re-tightening after the first several gallons. If the nut has been tightened completely and paint continues to leak past the seals, repack the pump.

Streaks in the spray pattern, especially heavy bands at the outside edge, is an indication of low pressure at the tip. Turn up the pressure control knob until these bands are eliminated. If the sprayer is already at maximum, you may have to use larger diameter hose or shorten the length of the hose to reduce the pressure drop. Also, make sure any paint filters in the system are clean, because there will be a pressure drop across a restricted or plugged screen.

Sprayers are rated for a maximum tip size. Using a tip that is larger than the maximum size or a tip that is worn larger will cause low pressure. The tip should also be the proper size for the type of material being sprayed. After extended use, spray tips will wear out, causing a poor spray pattern. You may have to replace the spray tip with a new one to restore the proper spray pattern.

Graco sprayers can spray all types of latex, water-based lacquer, and oil based materials. However, the sprayer is not designed to spray solvent-based lacquer. There are a few other considerations that you should be aware of. Be sure that all equipment is of sufficient size and of a high enough pressure rating to work with the material that is being sprayed. Another issue to be aware of is that no matter how well a sprayer is cleaned out, some residue will remain behind. It is not uncommon to have pigmented paints contaminate a clear coating like varnish and lacquer. Switching between water-based and solvent-based materials can also make the insides of the pump gummy and sticky. Ideally, we would recommend two different sprayers, but at the very least, you should use a dedicated hose for lacquer and clear coatings.

Usually, when a sprayer does not build up pressure, the outlet check ball is either stuck in the open position or on the seat. Unplug the sprayer and relieve any pressure in the system.

If your sprayer has a small black cover just right of the sprayer's fluid hose connection, remove the black cover and use a 3/4" socket to un-screw the outlet check valve and clean it.

If your sprayer does not have the black cover, you will need to lay the sprayer on its back with the front cover up. Remove the 4 screws that attach the cover, hold the prime spray valve and pressure control knobs down so they remain with the sprayer, and gently lift off the cover. The knobs must remain with the pump on the sprayer. The outlet check valve will be in the middle of the pump housing sitting at an angle. Remove the outlet check valve, clean it, and then replace all the items.

Parts and Service

To locate an authorized service center for repair, maintenence or parts for your sprayer, enter your zip code in the Distributor Locator.

Graco Distributor Locator

Customer Service

Here at Graco, customer service is our first priority. Whether you have questions about your Paint or Texture Sprayer, need to service your machine, or just want to give us feedback, you have come to the right place! From total product support to “tricks of the trade”, we want to help you get the most out of your Magnum and Graco Paint and Texture equipment!