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Graco GX21 - User Manual

Graco GX21
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3A8429B
EN
Operation, Parts
GX21, GX19, and GX FF Cordless
Electric Airless Sprayers
For portable airless spraying of architectural paints and coatings. Not
approved for use in explosive atmospheres or hazardous (classified)
locations. For professional use only.
GX21 Cordless Models: 25T973, 25T967
FinishPro GX19 Models: 25U341, 25U855
GX FF Models: 25U466, 25U570
3000 psi (207 bar, 20.7 MPa) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in this manual and related manuals. Be familiar with
the controls and the proper usage of the equipment. Save these instructions.
Related Manuals
312830 (SG3) Gun (GX21)
3A6285 Contractor PC Compact Gun (GX19, GX FF)
3A3172 Pump
Use only genuine Graco replacement parts.
The use of non-Graco replacement parts may void warranty.
www.graco.com/techsupport
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Table of Contents

Questions and Answers

  • S
    Samantha DayAug 18, 2025
    What to do if Graco GX21 Paint Sprayer runs but pump doesn't prime?
    • S
      Stephanie ThompsonAug 18, 2025
      If your Graco Paint Sprayer runs but the pump isn't priming or loses prime while in use, first, try pressing the PushPrime button to dislodge the ball, or power flush the sprayer. Ensure the Prime/Spray Valve is in the PRIME position until paint exits the drain tube. If you're using thick fluids, prime the pump with oil or water-based flushing fluid. Check the inlet strainer and make sure the suction tube is immersed in paint. Strain the paint to remove any debris. For thick or sticky paint, try momentarily turning the ON/OFF switch off and on several times. Inspect the suction tube connection for any cracks or vacuum leaks. Clean the outlet valve assembly and check if the inlet valve check ball or seat is dirty.
  • M
    Michelle PhelpsAug 22, 2025
    Why is paint leaking through the drain tube of my Graco GX21?
    • B
      Bradley BrownAug 22, 2025
      If paint is leaking through the drain tube of your Graco Paint Sprayer, take the sprayer to a Graco authorized service center, as the sprayer may be over pressurizing.
  • D
    Diane HubbardAug 26, 2025
    Why does paint from my Graco Paint Sprayer run or sag?
    • K
      Keith WrightAug 26, 2025
      If your Graco Paint Sprayer is spraying paint that runs down the wall or sags, move the gun faster. Also, choose a spray tip with a smaller hole size, use a spray tip with a wider fan, and ensure the gun is far enough from the surface.
  • L
    Linda RasmussenAug 28, 2025
    Why is my Graco GX21 Paint Sprayer coverage inadequate?
    • S
      Sandra MillerAug 28, 2025
      If your Graco Paint Sprayer sprays with inadequate coverage, move the gun slower. Also, choose a spray tip with a larger hole size, use a spray tip with a narrower fan, and make sure the gun is close enough to the surface.
  • R
    Robert RyanAug 30, 2025
    Why does my Graco Paint Sprayer fan pattern vary dramatically?
    • F
      fjohnsonAug 30, 2025
      If the fan pattern varies dramatically while spraying with your Graco Paint Sprayer, take the sprayer to a Graco authorized service center, as the pressure control switch may be worn and causing excessive pressure variation.
  • M
    Mary CurrySep 2, 2025
    Why is paint coming out of the pressure control on my Graco GX21 Paint Sprayer?
    • M
      Mr. Spencer WatsonSep 2, 2025
      If paint is coming out of the pressure control on your Graco Paint Sprayer, take the sprayer to a Graco authorized service center because the pressure control is worn.
  • P
    Pamela TuckerSep 4, 2025
    Why does paint leak down the outside of the pump on my Graco GX21?
    • M
      Matthew OliverSep 4, 2025
      If paint leaks down the outside of the pump of your Graco Paint Sprayer, replace the pump packings with a new ProXChange module.
  • A
    Angela MillerSep 6, 2025
    Why does my Graco Paint Sprayer make no sound when turned on?
    • S
      Steven HutchinsonSep 6, 2025
      If your Graco Paint Sprayer makes no sound when the pressure control is ON and the ON/OFF switch is ON (illuminated), replace the battery with a charged battery. If the battery has reached the end of its life, replace it. If the motor is damaged, replace the motor. If the ON/OFF switch light blinks three times, allow the battery to cool down or warm up to room temperature. If the light blinks four times, replace the pump and/or motor assembly. If the light blinks five times, allow the motor to cool down to room temperature.
  • T
    Thomas SanchezSep 9, 2025
    Why won't the ON/OFF switch illuminate on my Graco GX21?
    • S
      Stephanie CombsSep 9, 2025
      If the ON/OFF switch on your Graco Paint Sprayer does not illuminate when pressed, install the battery correctly, ensure it is fully charged, or replace it. If the control board is damaged, replace it. If the power switch is damaged, replace it.
  • J
    Jennifer MorganSep 12, 2025
    Why can't I trigger my Graco Paint Sprayer?
    • G
      gamblejasonSep 12, 2025
      If you cannot trigger the spray gun on your Graco Paint Sprayer, rotate the trigger lock to disengage it.

Summary

Models

Related DEWALT Manuals

Lists manuals for compatible DEWALT chargers and batteries.

Important Grounding Information

Warnings

Fire and Explosion Hazards

Covers risks related to static electricity, flammable fumes, and ignition sources.

Skin Injection and Equipment Misuse

Details hazards of high-pressure injection and general equipment misuse.

Material and Component Hazards

Addresses risks from incompatible materials, battery use, moving parts, toxic fluids, and PPE.

Know Your Sprayer

GX21 Component Identification

Provides a visual guide and labels for GX21 sprayer parts.

GX19 and GX FF Component Identification

Provides a visual guide and labels for GX19/GX FF sprayer parts.

Grounding Instructions

Pails

Specific instructions for grounding pails used with the sprayer.

Setup

Strain the Paint

Procedure for filtering paint to prevent tip clogs and priming issues.

Battery Installation and Removal

Instructions for correctly installing and removing the sprayer's battery.

Pressure Relief Procedure

Operation

Flush Storage Fluid

Instructions for flushing initial storage fluid from the system.

Fill Pump

Steps for filling the pump with paint or flushing fluid.

Fill Gun and Hose

Procedures to fill the spray gun and hose with material.

How to Spray

Spray Tip Installation

Instructions for correctly installing the spray tip and guard.

Spray

Information on spray quality and pressure adjustment for RAC XTM FF LP tips.

Adjust Pressure Control

How to adjust the sprayer's pressure for desired results.

Tip and Pressure Selection

Guidance on choosing the correct spray tip and pressure settings.

Spray Techniques

Basic spraying techniques for practice and achieving even finishes.

Triggering Gun

Proper method for pulling and releasing the spray gun trigger.

Aiming Gun

Technique for aiming the spray gun for consistent overlap.

Clear Tip Clog

How to quickly clear blockages in the spray tip.

Spray Pattern Quality

How to identify and achieve a good spray pattern.

Cleanup

Cleaning From a Pail (Stand Models)

Steps for cleaning the sprayer using a pail for models with suction tubes.

Power Flush (GX21, Water-Based Materials Only)

A faster flushing method for water-based materials on GX21 models.

Hopper Flushing (Hopper Models Only)

Instructions for flushing models equipped with a hopper.

Cleaning InstaClean Fluid Filter (Optional)

Maintenance for the optional InstaClean fluid filter.

Clean the Gun

Steps for cleaning the spray gun components.

Storage

Reference

Spray Tip Selection

How to choose the correct spray tip based on fluid and application.

Understanding Tip Number

Explains how to interpret spray tip model numbers.

Cleaning Fluid Compatibility

Information on compatible cleaning fluids and flushing procedures.

Quick Reference

A summary of sprayer components and their functions.

Maintenance

Airless Hoses

Inspection and maintenance of airless spray hoses.

Spray Tips

Care and replacement guidelines for spray tips.

Pump Repair

Information on addressing leaks due to worn pump packings.

Pump Removal

Steps for removing the pump assembly for repair or maintenance.

Inlet Valve Removal

How to remove the inlet valve for cleaning or replacement.

ProXChange Removal Tool

Information on using the tool for ProXChange packing assembly removal.

Pump Installation

Steps for reinstalling the pump assembly after service.

Troubleshooting

GX21 Cordless Airless Sprayer Parts

GX21 Cordless Airless Sprayer Parts List

A detailed list of part numbers and descriptions for the GX21 model.

GX19 and GX FF Portable Hopper Sprayer Parts

GX19 and GX FF Portable Hopper Sprayer Parts List

A detailed list of part numbers and descriptions for GX19/GX FF models.

Pump Assembly

Pump Assembly Parts List

A list of part numbers and descriptions for the pump assembly.

Wiring Diagrams

Technical Specifications

Graco Standard Warranty

Graco Information

Graco GX21 Specifications

General IconGeneral
Maximum Operating Pressure3300 psi
Hose Length50 ft
Power SourceElectric
Max. Working Pressure3300 psi
TypeAirless Paint Sprayer
Voltage120V
Maximum Tip Size0.021 inch
MotorDC Motor
Flow Rate0.31 GPM
Tip Size0.021 in

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