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Graco Ultra MAX II 495 PC Pro - User Manual

Graco Ultra MAX II 495 PC Pro
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3A6491E
EN
Operation, Parts
Electric Airless
Sprayers
For portable airless spraying of architectural paints and coatings. For
professional use only. Not approved for use in explosive atmospheres or
hazardous locations.
490/495/595/650/395EU Models:
3300 psi (228 bar, 22.8 MPa) Maximum Working Pressure
See page 3 for additional model information.
Important Safety Instructions
Read all warnings and instructions in this manual, in related manuals, and on the unit
before using the equipment. Be familiar with the controls and the proper usage of the
equipment. Save these instructions.
Related Manuals
Gun – 3A6285 (Contractor PC) Pump – 334599
Use only genuine Graco replacement parts.
The use of non-Graco replacement parts may void warranty.

Table of Contents

Questions and Answers

  • S
    Sydney HillAug 17, 2025
    What to do if fluid is spitting from the gun of my Graco Paint Sprayer?
    • G
      Gregory HunterAug 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.
  • A
    Angel FarmerAug 22, 2025
    Why is my Graco Paint Sprayer pump difficult to prime?
    • J
      Janet HawkinsAug 23, 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.
  • L
    Leon BrockAug 26, 2025
    How to fix excessive paint leakage into throat packing nut on my Graco Paint Sprayer?
    • B
      Benjamin GreeneAug 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.
  • A
    Amy BennettAug 28, 2025
    Why is the pump output low on my Graco Ultra MAX II 495 PC Pro Paint Sprayer?
    • J
      Joel JohnsonAug 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.
  • S
    sally06Aug 30, 2025
    What to do if motor runs but pump does not stroke on Graco Paint Sprayer?
    • L
      Lauren OrrAug 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.
  • J
    James KellySep 2, 2025
    Why Graco Ultra MAX II 495 PC Pro does not run and the control board status light blinks 6 times?
    • K
      kaylasmithSep 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.
  • R
    Randall WarrenSep 5, 2025
    Why does my Graco Ultra MAX II 495 PC Pro Paint Sprayer stop after running for a few minutes?
    • C
      Christian RoySep 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.
  • M
    Mrs. Sara TurnerSep 8, 2025
    What to do if Graco Ultra MAX II 495 PC Pro Paint Sprayer does not run and control board blinks 5 times?
    • C
      Connor SmithSep 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.
  • L
    Lisa TaylorSep 12, 2025
    How to troubleshoot basic electrical problems with Graco Ultra MAX II 495 PC Pro?
    • J
      John ScottSep 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.
  • C
    Christopher SheltonSep 13, 2025
    What to do if Graco Paint Sprayer does not shut off and control board blinks 2 times?
    • B
      bhuertaSep 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

Operation and Parts

Electric Airless Sprayers Introduction

Model Identification

Sprayer Model Configurations

Safety Warnings

Grounding, Electrical, and Fire Safety

Covers grounding, electrical safety, and fire/explosion prevention measures.

Personal Injury and Equipment Hazards

Details risks of skin injection, misuse, moving parts, toxic fluids, and PPE.

Component Identification

Stand Model Components

Lo-Boy Model Components

Hi-Boy Model Components

Pressure Relief Procedure

Step-by-Step Pressure Relief

Provides a detailed procedure to safely relieve pressure in the sprayer.

Setup and Preparation

Initial Sprayer Setup

Guides through the initial setup process after unpacking or long storage.

Startup Procedures

Starting the Sprayer

Details the steps to safely start and prepare the sprayer for operation.

Sprayer Operation

Spray Tip Installation

Clearing Spray Tip Clogs

Cleanup and Flushing

Routine Maintenance

Maintenance Schedule and Activities

Troubleshooting: Mechanical and Fluid Flow

Diagnosing Low Pump Output

Guides troubleshooting steps for low pump output issues.

Addressing Pump Stroke Issues

Troubleshoots problems related to pump stroke and motor operation.

Prime and Operation Stoppage Issues

Resolves problems with sprayer priming and intermittent operation.

Troubleshooting: Electrical Issues

Sprayer Not Running or Shutting Off

Diagnoses issues where the sprayer won't run, stops, or won't shut off.

Control Board Status Light Codes

Interprets error codes indicated by the control board status light.

Motor Control and Rotation Problems

Troubleshoots motor control signals and shaft rotation issues.

Sprayer Will Not Run Flowchart

Provides a flowchart for diagnosing sprayer startup failures.

Sprayer Will Not Shut Off Flowchart

Provides a flowchart for diagnosing issues where the sprayer won't shut off.

Parts Lists and Diagrams

Stand Sprayer Parts

Lo-Boy Sprayer Parts

650 Lo-Boy Sprayer Parts

Hi-Boy Sprayer Parts

650 Hi-Boy Sprayer Parts

Technical Specifications

Sprayer Performance Specifications

Graco Standard Warranty

Warranty Terms and Conditions

Graco Ultra MAX II 495 PC Pro Specifications

General IconGeneral
TypeAirless Paint Sprayer
Max Pressure3300 PSI
Max Tip Size0.021 inches
Power SourceElectric
Hose Length50 ft
Horsepower1.0 hp

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