Graco Airless Paint Sprayer Troubleshooting Guide

Graco airless paint sprayers are popular for their efficiency and ease of use. However, they encounter faults like any other sprayer.

In this article, we have provided comprehensive information on the common problems and solutions for Graco airless paint sprayers.

1. Spray Pattern Issues

Problem: Uneven Spray Pattern The solution for an uneven spray pattern could be due to various reasons, including:

Clogged or Worn Spray Tip: Over time, the spray tip can become clogged with paint buildup or may be worn down. Clean the tip with a cleaning needle or replace it with a new one.
Thick Paint: If the paint is too thick, it can cause the spray pattern to be uneven. Thin the paint to the recommended consistency, which is usually specified by the manufacturer.
Low Pressure: When the pressure is too low, the paint is not atomized properly, which can cause an uneven spray pattern. Adjust the pressure to the recommended setting, which is usually specified by the manufacturer.
Incorrect Tip Size: It’s essential to match the tip size with the type of paint and surface being sprayed. If the tip size is too small, the paint can clog, resulting in an uneven spray pattern. If the tip size is too large, it will cause the paint to be atomized too much and result in a heavy, uneven spray pattern.

Problem: Spray is Too Heavy A heavy spray could be due to:

High Pressure: If the pressure is too high, it can cause the paint to be atomized too much and result in a heavy spray. Adjust the pressure to the recommended setting, which is usually specified by the manufacturer.
Large Tip Size: If the tip size is too large, it can cause a heavy spray. Match the tip size with the type of paint and surface being sprayed, and adjust it to the recommended size.

Problem: No Paint is Coming Out A lack of paint flow could be caused by:

Clogged Tip: A clogged tip can prevent paint from coming out. Clean the tip with a cleaning needle or replace it with a new one.
Thick Paint: Thick paint can cause the sprayer to clog, resulting in no paint flow. To resolve this, thin the paint to the recommended consistency.
Low Pressure: If the pressure is too low, the paint will not flow out of the sprayer. Adjust the pressure to the recommended setting, which is usually specified by the manufacturer.
Clogged Filters: The filters in the sprayer can become clogged, which can prevent paint from flowing. Clean or replace the filters.
Kinked or Clogged Suction Tube: The suction tube that connects the paint container to the sprayer can become kinked or clogged, preventing paint from flowing. Straighten the suction tube or clear any blockages.

Problem: Pressure Fluctuations Pressure fluctuations could be due to:

Kinked or Clogged Suction Hose: If the suction hose that connects the paint container to the sprayer is kinked or clogged, it can cause pressure fluctuations. Straighten the hose or clear any blockages.
Clogged Filters: With continuous use, the filters can get clogged. When this happens, it can cause pressure fluctuations. Clean the filters or have them replaced.
Damaged or Worn Pump: The pump that creates pressure in the sprayer can become damaged or worn over time, causing pressure fluctuations. Inspect the pump and if it appears to be damaged, it may need to be replaced.
Clogged or Damaged Pressure Control Valve: The pressure control valve regulates the pressure in the sprayer. If it is clogged or damaged, it can cause pressure fluctuations. Clean or replace the valve if necessary.

Problem: No Pressure If there is no pressure being produced, check the following:

Sprayer is not turned on: Make sure the sprayer is properly turned on and connected to a power source.
Kinked or Clogged Suction Hose: See above.
Clogged Filters: See above.
Damaged or Worn Pump: See above.
Clogged or Damaged Pressure Control Valve: See above.

Problem: Motor will not start If the motor will not start, check the following:

Power source not connected or not providing power: Ensure that the sprayer is properly connected to a power source and that the source is providing power.
On/off switch not working: The on/off switch may need to be replaced if it is not working properly.
Damaged Motor: If the motor appears to be damaged, it may need to be replaced.

Problem: Motor runs but does not build pressure If the motor is running but not building pressure, check the following:

To maintain your Graco airless paint sprayer, follow these steps:

Clean the sprayer after each use: Use water or paint thinner to clean the sprayer, especially the hose, gun, and tip.
Store the sprayer properly: Store the sprayer in a dry, protected area to prevent damage from moisture and other environmental factors.
Check for leaks: Regularly inspect the sprayer for any signs of leaks, such as wet spots or drips.
Replace worn parts: If any parts appear worn or damaged, replace them as soon as possible to ensure optimal performance.
Lubricate moving parts: Lubricate the sprayer’s moving parts, such as the inlet and outlet valves, with a light oil to keep them working smoothly.
Change the filters regularly: Replace the filters regularly to maintain proper suction and to prevent clogs.
Have the sprayer serviced annually: Have a professional service technician inspect and maintain your sprayer annually to ensure it is working at its best.

By following these steps, you can keep your Graco airless paint sprayer in good working condition for years to come.