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DeVilbiss AGX-550 - User Manual

DeVilbiss AGX-550
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AGX-550, AGX-552 & AGX-553
AUTOMATIC SPRAY GUNS
IMPORTANT: Read and follow all instructions and SAFETY
PRECAUTIONS before using this equipment. Retain for
future reference.
DESCRIPTION
The AGX spray gun is used on automatic and semi-automatic
machines where mass production spraying of articles is necessary
or hand spraying is not accurate enough. Models and application
information follows.
Note
This gun may be used with chlorinated solvents. Aluminum is
not used in fluid passages. If using chlorinated solvents, make
sure all other fluid handling components are also compatible.
CHART 1 MODELS
Model No.
(Available Typical Fluid Tip/Needle
Tip Sizes) Applications Construction
AGX-550 Most conventional materials 400 Gr. Stainless
(AC, D, E, and most waterbornes and 303 Gr. Stainless
FF, FX, G) chlorinated solvents.
AGX-552 Abrasive materials (i.e. porcelain Carboloy, 400 Gr.
(D, EE, FF) enamel, ceramic glazes, buffing Stainless
compounds) and/or water mix
materials. Includes abrasive
fluid seal.
AGX-553 Waterbornes and more corrosive 303 Gr.Stainless
(E, FF, FX) materials (below 7 pH) w/U.H.M.W.poly.
insert
SPECIFICATIONS
Maximum Air Pressure 100 psi
Maximum Fluid Pressure 100 psi
Cylinder Air Pressure - Minimum*50 psi
- Maximum 100psi
Weight - without mounting stud 26 ounces
- with mounting stud 30.5 ounces
Mounting Stud Diameter 3/4" (see Accessories for Optional
1/2" mounting)
Wetted Parts - AGX-550 300 & 400 Gr.Stainless, PTFE
- AGX-552 300 & 400 Gr. S.S., carboloy, PTFE
- AGX-553 300 Gr. S.S., PTFE, U.H.M.W. Poly.
Hose Connections - Fluid Inlet 3/8" NPS(M)
- Cylinder Air 1/4" NPS(M)
- Atomization Air 1/4" NPS(M)
*For installations where 50 psi cylinder air is not available, the
inner (red) piston spring can be removed which lowers the mini-
mum cylinder air to approximately 37 psi. Refer to Operations,
page 3, paragraph 2.
FLUID TIP ORIFICE SIZES
Letters on Tip Inch mm
AC .110" 2.8
D .086" 2.2
E .070" 1.8
EE .070" 1.8
FF .055" 1.4
FX .042" 1.1
G .028" .7
Tools Required: Adjustable wrench for hose connections
1/2" six point box wrench for Ref. (3)
9/16" open wrench for Ref. (9)
3/16" hex wrench for Ref. (6)
Long neck pliers for Ref. (19)
1/8" hex key for Ref. (24)
1/2" and 9/16" socket wrench for Ref. (3) (9)
FIGURE 1 DIMENSIONS
SB-2-624-X (6/2017) 1 / 12 www.carlisleft.com
EN
SERVICE MANUAL
IMPORTANT! DO NOT DESTROY
It is the Customer's responsibility to have all operators and service personnel read and understand this manual.
Contact your local DeVilbiss representative for additional copies of this manual.
READ ALL INSTRUCTIONS BEFORE OPERATING THIS DEVILBISS PRODUCT.

Questions and Answers

  • G
    Geoffrey HarrisonAug 2, 2025
    Why does my DeVilbiss Paint Sprayer have an improper spray pattern?
    • N
      nicholasshahAug 2, 2025
      If your DeVilbiss Paint Sprayer produces an improper spray pattern, try these steps: * Readjust the gun, referring to the “Operation Section”. * Clean any material buildup on the air cap or fluid tip, consulting the “Preventive Maintenance” section. * Adjust the material pressure or thin the material if it’s too thick. * Increase material or reduce atomizing air pressure if the material is insufficient or the atomizing air pressure is too high.
  • K
    kristinevansAug 7, 2025
    What to do if my DeVilbiss Paint Sprayer is dripping from the fluid tip?
    • R
      Ryan QuinnAug 7, 2025
      If your DeVilbiss Paint Sprayer is dripping from the fluid tip, it could be due to a worn or damaged fluid tip or needle. It could also be that the piston springs are damaged or deformed, or that there is an extra air packing installed in the piston. Replace the worn or damaged fluid tip or needle. Replace the damaged or deformed piston springs. Remove any extra air packing.
  • T
    tatejerryAug 12, 2025
    Why does my DeVilbiss AGX-550 Paint Sprayer have a jerky or fluttering spray?
    • V
      Victoria HoweAug 12, 2025
      If you experience a jerky or fluttering spray with your DeVilbiss Paint Sprayer, it may be due to insufficient material in the tank, an obstruction in the line, a plugged gun material passage, worn packings, or a loose/damaged fluid tip. Fill the tank or clear any obstruction. Clean the gun material passage. Replace worn packings. Tighten or replace the fluid tip.
  • D
    Daniel MyersAug 17, 2025
    What to do if fluid is leaking from needle packings on my DeVilbiss Paint Sprayer?
    • Z
      Zachary PerkinsAug 17, 2025
      If fluid is leaking from the needle packings on your DeVilbiss Paint Sprayer, this may be because the needle packings are worn, or the fluid needle shaft is rough or worn. Replace the needle packings. Polish the contact point where the packings make contact with very fine emery cloth, or replace the fluid needle shaft.
  • R
    Ryan McguireAug 22, 2025
    How to fix a DeVilbiss AGX-550 that will not spray?
    • G
      George HarrisAug 22, 2025
      If your DeVilbiss Paint Sprayer will not spray, it could be due to no pressure to the gun, the piston stops moving or a new air packing. Check the air and material lines. Check the tightness of the socket screws. Remove the fluid needle and lubricate it with petroleum jelly before reassembling.
  • J
    Jill LynchAug 27, 2025
    Why is my DeVilbiss AGX-550 leaking air from the control valve?
    • M
      Margaret JohnsonAug 27, 2025
      If there is air leakage from the control valve of your DeVilbiss Paint Sprayer, it is likely due to worn seals. Replace the valve.

Summary

Product Description

Product Specifications

Safety Precautions

Equipment Installation

Operating Procedures

Preventive Maintenance

Cleaning Procedures

Carefully follow instructions for cleaning the gun and hose using solvent.

Parts Replacement Guide

Fluid Needle and Tip Replacement

Procedures for replacing the fluid needle, tip, and associated packings.

Fluid Needle and Packing Replacement

Detailed steps for replacing fluid needle and its packings.

Piston, O-Rings, and Seal Replacement

Instructions for replacing piston, O-rings, and seals in the spray gun.

Lubrication Instructions

HVLP Conversion

Troubleshooting Common Issues

Available Accessories

Warranty Policy Information

DeVilbiss AGX-550 Specifications

General IconGeneral
Fluid Delivery0.38 GPM
Flow Rate0.38 GPM
Tip SizeInformation not available
Air Inlet1/4" NPT
Fluid Inlet3/8" NPT

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