Graco Ultra MAX II 490 PC Pro

Questions and Answers

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Julie JohnsonAug 17, 2025
What to do if fluid is spitting from the gun of my Graco Ultra MAX II 490 PC Pro Paint Sprayer?
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  Maurice RodriguezAug 17, 2025
  If your Graco Paint Sprayer is spitting fluid from the gun, it could be due to a few reasons. There might be air in the pump or hose, so check and tighten all fluid connections, and cycle the pump slowly during priming. Another possibility is a partially clogged spray tip, which you should clear. Also, ensure that your fluid supply isn't low or empty, and refill it if necessary, then prime the pump.
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Michael BrownAug 22, 2025
Why is my Graco Paint Sprayer pump difficult to prime?
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  Andrew NguyenAug 22, 2025
  If you're finding it difficult to prime your Graco Paint Sprayer, consider these potential causes. Air in the pump or hose can be a culprit, so check and tighten all fluid connections, and cycle the pump slowly during priming. A leaking intake valve can also make priming difficult; clean the intake valve, ensuring the ball seat is in good condition. Worn pump packings may also be the cause, and in that case, you would need to replace them. Lastly, ensure the paint isn't too thick, and thin it according to the supplier's recommendations.
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Jeffrey DavisAug 26, 2025
How to fix excessive paint leakage into throat packing nut on my Graco Ultra MAX II 490 PC Pro Paint Sprayer?
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  Brian HardingAug 26, 2025
  If you notice excessive paint leakage into the throat packing nut of your Graco Paint Sprayer, there are a few possible reasons. The throat packing nut might be loose; remove the spacer and tighten the nut just enough to stop the leakage. Alternatively, the throat packings could be worn or damaged, requiring replacement. Also, the displacement rod might be worn or damaged, and would need to be replaced.
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Patricia HarrisAug 28, 2025
Why is the pump output low on my Graco Ultra MAX II 490 PC Pro Paint Sprayer?
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  fmartinezAug 28, 2025
  If the pump output is low on your Graco Paint Sprayer, several factors could be responsible. First, check if the spray tip is worn and replace it if necessary. A clogged spray tip can also reduce output, so relieve the pressure and clean it. Ensure that you have enough paint supply and reprime the pump. Inspect the intake strainer for clogs, and clean it if needed. Also, a clogged fluid or tip filter can cause this issue, so clean the filter. Finally, leaking from the prime valve can lead to low pump output, so repair the prime valve.
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David KaneAug 30, 2025
What to do if motor runs but pump does not stroke on Graco Paint Sprayer?
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  Walter SimmonsAug 30, 2025
  If the motor runs but the pump doesn't stroke on your Graco Paint Sprayer, it could be due to a damaged connecting rod assembly, which would need replacement. Alternatively, the gears or drive housing might be damaged, requiring inspection and possible replacement.
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Paul YoungSep 2, 2025
Why Graco Paint Sprayer does not run and the control board status light blinks 6 times?
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  Daniel LewisSep 2, 2025
  If your Graco Paint Sprayer doesn't run at all and the control board status light blinks 6 times repeatedly, it could be due to the motor being hot or a fault in the motor thermal device. Allow the sprayer to cool down. If it runs when cool, address the cause of overheating by ensuring the sprayer is in a cooler location with good ventilation and that the motor air intake isn't blocked. If it still doesn't run, replace the motor. Make sure to check the thermal device connector at the control board and measure the resistance of the thermal device.
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ambersmithSep 5, 2025
Why does my Graco Ultra MAX II 490 PC Pro stop after running for a few minutes?
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  Mr. Jerry ScottSep 5, 2025
  If your Graco Paint Sprayer operates for only 5 to 10 minutes and then stops, the pump packing nut might be too tight. This restricts pump action and overloads the motor. Loosen the pump packing nut, and check for leaks around the throat. If necessary, replace the pump packings.
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Emily ValdezSep 7, 2025
What to do if Graco Ultra MAX II 490 PC Pro Paint Sprayer does not run and control board blinks 5 times?
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  mayangelSep 8, 2025
  If your Graco Paint Sprayer doesn't run and the control board status light blinks 5 times repeatedly, the control might be commanding the motor to run, but the motor shaft isn't rotating. This could be due to a locked rotor, an open connection between the motor and control, a problem with the motor or control board, or excessive motor amp draw. Remove the pump and try to run the sprayer. If the motor runs, check for a locked or frozen pump or drive train. If it doesn't run, disconnect the motor connector(s) from the control board socket(s), ensuring the contacts are clean and secure. Then, spin the motor fan and restart the sprayer. If it runs, replace the control board.
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Jennifer SaundersSep 12, 2025
How to troubleshoot basic electrical problems with Graco Paint Sprayer?
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  Mrs. Jaclyn SmithSep 12, 2025
  For basic electrical problems with your Graco Paint Sprayer, ensure the motor leads are securely fastened and properly mated. Replace any loose terminals and crimp them to the leads, ensuring they are firmly connected. Clean the circuit board terminals and securely reconnect the leads. Also, inspect the motor armature commutator for burn spots, gouges, or extreme roughness, and have a motor shop resurface the commutator if possible.
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nvasquezSep 13, 2025
What to do if Graco Ultra MAX II 490 PC Pro does not shut off and control board blinks 2 times?
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  angela93Sep 13, 2025
  If your Graco Paint Sprayer does not shut off and the control board status light blinks 2 times repeatedly, the control board may be faulty and needs to be replaced.

Summary

Important Safety Instructions

Model Identification

General Safety Warnings

Grounding Safety

Explains the importance of grounding for safety and proper operation.

Fire and Explosion Hazards

Details hazards and precautions related to flammable fumes and ignition sources.

Injection and Misuse Hazards

Warns about high-pressure injection injuries and equipment misuse risks.

Electrical, Fluid, and PPE Safety

Covers electric shock, toxic fluids, moving parts, and essential protective gear.

Component Identification

Stand Model Components

Identifies components of the stand model sprayer.

Lo-Boy Model Components

Identifies components of the Lo-Boy model sprayer.

Hi-Boy Model Components

Identifies components of the Hi-Boy model sprayer.

Grounding and Power

Power Requirements

Specifies voltage, frequency, and amperage requirements for operation.

Extension Cords

Provides guidelines for selecting and using extension cords.

Pail Usage

Details requirements for using pails with the sprayer.

Pressure Relief Procedure

Equipment Setup

Trigger Lock Operation

Explains how to use the trigger lock for safety during operation.

Startup Procedure

Operation

Spray Tip Installation

Details the process for installing the spray tip and tip guard.

Spraying Technique

Explains the basic spraying operation and pressure adjustment for optimal results.

Clearing Spray Tip Clogs

Provides steps to clear a clogged spray tip to maintain spray performance.

Sprayer Cleanup

Outlines the procedure for cleaning the sprayer after use.

Fast Flush Hose and Gun

Details the process of flushing the hose and gun for maintenance.

Digital Display Usage

Display Modes Explained

Explains how to use and interpret the digital display modes like pressure, job gallons, and lifetime gallons.

Stored Data Access

Describes how to access and clear stored data, including error codes and motor run hours.

BlueLink App Features

BlueLink Enable;Disable

Provides instructions for activating or deactivating the BlueLink Bluetooth feature.

Maintenance

Routine Maintenance Schedule

Lists routine maintenance activities and their recommended intervals for optimal sprayer performance.

End-of-Life Recycling

Guides on how to dismantle and recycle the product responsibly.

Troubleshooting

Mechanical and Fluid Flow Issues

Addresses common problems related to pump output and fluid flow.

Electrical System Problems

Covers common electrical symptoms, error codes, and troubleshooting steps.

Sprayer Not Running Diagnosis

Provides a flowchart for diagnosing and resolving startup issues related to the sprayer not running.

Sprayer Not Shutting Off Diagnosis

Offers a troubleshooting procedure for the sprayer failing to shut off.

Stand Sprayer Parts and Diagrams

Lo-Boy Sprayer Parts

650 Lo-Boy Sprayer Parts

Hi-Boy Sprayer Parts

650 Hi-Boy Sprayer Parts

Accessories and Labels

Control Box Components

BlueLink Battery Replacement

Wiring Diagrams

110;120 V Models Wiring

Presents wiring diagrams for 110/120V models (395EU, 490, 495, 595).

230 V Models Wiring

Presents wiring diagrams for 230V models (490, 495, 595).

Model 650 120 V;110 V Wiring

Details wiring diagrams for the Model 650 (120V/110V).

Model 650 230 V Wiring

Details wiring diagrams for the Model 650 (230V).

Technical Specifications

Compliance Information

Radio Frequency Approvals

Provides information on FCC, IC, and other radio frequency compliance standards.

Graco Standard Warranty

Graco Contact Information