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DeVilbiss EGA-503 - User Manual

DeVilbiss EGA-503
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SB-2-163-M (11/2014) 1 / 8
SERVICE MANUAL
EGA-503 SPRAY GUN
(SPRAY PISTOL)
*Repair Kit No. KK-5044
(190681)
Important: Before using this equipment,
read all safety precautions and instructions.
Keep for future use.
DESCRIPTION
The EGA-503 is an external mix, touch-up
gun. The gun has a long needle taper mak-
ing detail work easy. The forefinger trigger
gives added control for delicate applica-
tion. Can be used for touch-up, shading,
edging or any type of precision painting.
Use as either suction or pressure feed
application.
Note
Wetted surfaces are stainless steel
and aluminum. Please see Warn-
ing on Page 2 regarding explosion
hazard.
SPECIFICATIONS
Air Inlet: 1/4" NPS (M)
Fluid Inlet: 1/4" NPS (M)
Type Feed: Suction or Pressure
Wetted Parts: Aluminum & Stainless Steel
P1 = Maximum Air Pressure 100 PSI (7 bar)
P2 = Maximum Fluid Pressure 10 PSI (.68 bar)
OPERATION
Prepare and strain material according to the
paint manufacturer's instructions. Attach
container to fluid inlet and tighten. Adjust
incoming air pressure to gun to achieve
desired spray results.
Note
To minimize overspray, only use as
much pressure as required to atom-
ize material.
PREVENTIVE MAINTENANCE
To clean fluid passages, remove excess
material at source, then flush with a suit-
able solvent.
To clean air cap and fluid tip, brush with a
stiff bristle brush. If necessary, use a broom
straw or toothpick. Never use a wire or hard
instrument. This may scratch or burr holes
causing a distorted spray pattern.
Note
Worn parts can cause fluid leakage.
When replacing fluid tip or fluid
needle, replace both at the same
time. Lapped sets are available.
Also replace the fluid tip gasket and
needle packing at this time.
To prevent damage to the fluid tip or
fluid needle, be sure to either 1) push
the trigger and hold while tightening
the fluid tip or 2) remove the fluid
needle adjusting screw to relieve
spring pressure.
Figure 1
*Government NSN No. 4940-01-182-6975
= KK-5044
LUBRICATION
For best results, lubricate the points in-
dicated in Figure 1 daily using Gun Lube
SSL-10.
A. Trigger points
B. Packings
C. Adjusting valves
D. Needle/Air valve springs
(occasionally)
B
A
C
D

Table of Contents

Questions and Answers

  • M
    madison62Aug 20, 2025
    Why is my DeVilbiss Paint Sprayer producing excessive overspray (spray mist)?
    • K
      Kimberly NielsenAug 20, 2025
      Excessive overspray from your DeVilbiss Paint Sprayer can occur due to several reasons: the atomization air pressure might be too high, the gun may be too far from the work surface, or the stroking motion might be improper (arching, gun motion too fast). To resolve this, reduce the pressure, adjust to the proper distance from the surface, and move at a moderate pace parallel to the work surface.
  • J
    Jennifer HarrisAug 22, 2025
    How to fix jerky or fluttering spray from my DeVilbiss EGA-503?
    • B
      Brittany LewisAug 22, 2025
      A jerky or fluttering spray from your DeVilbiss Paint Sprayer could be due to several factors: a loose or damaged fluid tip/seat, low material level, the container being tipped too far, an obstruction in the fluid passage, a loose or broken fluid tube or fluid inlet nipple, or a dry or loose needle packing nut. To fix this, try the following: * Tighten or replace the fluid tip/seat. * Refill the material. * Hold the container more upright. * Clean any obstructions in the fluid passage. * Tighten or replace the fluid tube or fluid inlet nipple. * Lubricate or tighten the needle packing nut.
  • J
    Jacob JordanAug 25, 2025
    What to do if my DeVilbiss EGA-503 Paint Sprayer has a heavy center pattern?
    • R
      Rachel WilliamsAug 25, 2025
      A heavy center pattern on your DeVilbiss Paint Sprayer may be due to material flow exceeding the air cap’s capacity, atomizing pressure being too low, or the material being too thick. Try thinning the material or lowering the fluid flow, increasing the pressure, or thinning the material to the proper consistency.
  • J
    Jason HessAug 27, 2025
    What to do if my DeVilbiss EGA-503 will not spray?
    • M
      Matthew MccoyAug 27, 2025
      If your DeVilbiss Paint Sprayer will not spray, check the air supply and air lines to ensure there is air pressure at the gun. Also, make sure the needle adjusting screw is open enough.
  • H
    huangjohnnyAug 28, 2025
    How to fix a split spray pattern with my DeVilbiss EGA-503 Paint Sprayer?
    • D
      debra61Aug 28, 2025
      A split spray pattern with your DeVilbiss Paint Sprayer can occur if the fluid adjusting knob is turned in too far, there is insufficient material flow, the atomization air pressure is too high, or there is too much fan air. To correct this, back out the fluid adjusting knob counterclockwise to achieve proper flow, increase fluid pressure (if using pressure feed), reduce air pressure, and turn the fan adjust in to reduce fan air.
  • H
    Hunter KnightAug 30, 2025
    How do I fix a heavy right or left side pattern with my DeVilbiss EGA-503 Paint Sprayer?
    • A
      Ashley PattersonAug 30, 2025
      A heavy right or left side pattern from your DeVilbiss Paint Sprayer could be due to plugged left or right side horn holes, or dirt on the left or right side of the fluid tip. Clean the affected areas, reaming with a non-metallic point if necessary. To further troubleshoot, determine if the obstruction is on the cap or fluid tip by making a test pattern, then rotate the cap one-half turn and spray another pattern. If the defect is inverted, the obstruction is on the air cap; clean it. If the defect is not inverted, it is on the fluid tip; check for a fine burr on the edge of the fluid tip and remove it with #600 wet or dry sandpaper. Also, check for dried material just inside the opening and remove it by cleaning.
  • S
    Sherry GibsonSep 1, 2025
    How to fix a heavy top or bottom pattern with my DeVilbiss EGA-503 Paint Sprayer?
    • C
      carlossmithSep 1, 2025
      A heavy top or bottom pattern from your DeVilbiss Paint Sprayer may be caused by plugged horn holes, an obstruction on the top or bottom of the fluid tip, or a dirty cap and/or tip seat. To resolve this, clean the affected parts, reaming with a non-metallic point if necessary.
  • M
    michaelfrancisSep 3, 2025
    Why is my DeVilbiss Paint Sprayer producing a dry spray?
    • H
      hdominguezSep 3, 2025
      A dry spray from your DeVilbiss Paint Sprayer may occur if the air pressure is too high, the gun tip is too far from the work surface, the gun motion is too fast, or the gun is out of adjustment. Try decreasing the air pressure, adjusting to the proper distance, slowing down your motion, and adjusting the gun.
  • T
    Tyrone RussellSep 5, 2025
    What causes runs and sags when using my DeVilbiss EGA-503?
    • N
      Nathan BrownSep 5, 2025
      Runs and sags with your DeVilbiss Paint Sprayer can be caused by too much material flow, material that is too thin, or the gun being tilted at an angle. Adjust the gun or reduce fluid pressure, mix the material properly or apply light coats, and hold the gun at a right angle to the work, adapting proper gun technique.
  • Q
    qburgessSep 7, 2025
    Why is my DeVilbiss EGA-503 leaking fluid from the packing nut?
    • V
      Victoria BrownSep 7, 2025
      Fluid leaking from the packing nut of your DeVilbiss Paint Sprayer is likely because the packing nut is loose or the packing is worn or dry. Try tightening the nut, being careful not to bind the needle. If that doesn't work, replace or lubricate the packing.

Summary

Product Description and Operation

Product Description

Details the EGA-503 as an external mix, touch-up gun for detail work with forefinger trigger control.

Operation Instructions

Guide on preparing material, attaching container, and adjusting air pressure for desired spray results.

Specifications and Maintenance

Technical Specifications

Lists air inlet, fluid inlet, feed type, wetted parts, and maximum pressure ratings for the spray gun.

Preventive Maintenance

Instructions for cleaning fluid passages, air caps, and fluid tips using appropriate tools and solvents.

Lubrication Points

Specifies points on the gun to lubricate daily with Gun Lube SSL-10 for optimal performance.

Safety Precautions

General Safety Warnings

Highlights hazards like fire, toxic substances, and explosion risks from incompatible materials.

California Proposition 65 Warning

Warns about chemicals known to cause cancer and birth defects from product use.

Hazard Mitigation Safeguards

Details safeguards for fire, toxic inhalation, and explosion hazards during equipment use.

Usage and Disposal Guidelines

Covers general safety, solvent spray precautions, misuse warnings, and waste disposal procedures.

Parts List and Troubleshooting

Parts Identification

Lists all replacement parts with reference numbers, part numbers, descriptions, and quantities required.

Troubleshooting Guide

Provides solutions for common spray gun issues like pattern defects, leaks, and material flow problems.

Accessories and Warranty

Available Accessories

Lists and describes various optional accessories for spray gun use, including valves, brushes, and cleaners.

Warranty Policy

Outlines the one-year limited warranty on materials and workmanship for DeVilbiss products.

DeVilbiss EGA-503 Specifications

General IconGeneral
BrandDeVilbiss
ModelEGA-503
CategoryPaint Sprayer
LanguageEnglish

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