Graco Inc 224-224, 4600SC, 308-084, 235893 manual Electrical Tests, Test Gun Resistance See Fig, 40d

Page 16

ELECTRICAL TESTS

The performance of the spray gun is directly affected by the condition of the electrical components contained inside the gun. The electrical tests below can be used to determine the condition of the power supply (40) and the resistor stud (2) as well as the continuity of the electrical path between the components.

Use megohmmeter 218–979 (see ACCESSORIES) and an applied voltage of 500 volts to complete these electri- cal tests. Connect the leads as shown.

Remove the gun from the manifold and bracket, as instructed on page 18, before performing the electrical tests.

WARNING

To reduce the risk of sparking, which could cause fire, explosion, or electrostatic shock and result in serious bodily injury, do not use the megohmmeter in the hazardous area. Remove the gun from the hazardous area before testing it.

Test Gun Resistance (See Fig 11 )

Measure the resistance between the end of the electrode

(28)and the gun body (39). The resistance should be between 329 to 401 megohms. If the resistance is out- side the specified range, go to the next test. If the

resistance is correct, refer to the Electrical Troubleshooting Chart on page 15 for other possible causes of poor performance.

Test Power Supply Resistance (See Fig

12 )

Remove the power supply (40) from the gun body (39). See page 25.

Measure the resistance from the power supply’s ground contact point (EE) to the contact inside of the power sup- ply seal (40d) [the conductive rubber contact may be slightly recessed into the seal]. See Fig 12 .

The resistance should be 297 to 363 megohms. If the resistance is outside the specified range, the power sup- ply is defective and must be replaced. If the resistance of the power supply is correct, proceed to the next test.

If you still have problems, refer to the Electrical Troubleshooting Chart for other possible causes of poor performance, or contact the nearest authorized service agency.

KEY

 

A

Megohmmeter

A

28

Electrode

 

39

Gun Body

 

 

 

39

 

28

 

Fig 11

0440

 

KEY

 

 

A

Megohmmeter

 

 

EE

Ground Contact Point

A

40

Power Supply

 

 

 

40d

Seal

 

 

 

 

 

EE

 

40d

40

0441

 

 

Fig 12

16 ￿￿8￿￿8￿

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Contents Part No -224, Series a Air Spray Gun, without shroud Part No -893, Series aPart No -894, Series a Part No -094 Series a Gun ManifoldEquipment Misuse Hazard Hose SafetyHazardous Fluid Hazard Flushing and Cleaning Safety Ventilate the Spray BoothFIRE, EXPLOSION, or Electrostatic Shock Hazard GroundingTable of Contents Typical Installation Installing the SystemSystem Options Spraying Voltage MonitorInstallation Ventilate the Spray BoothInstall the Gun Mounting Bracket Install the Gun and Manifold See FigAccessories section Air Cap/Air Cap NutInstall the Fabric Cover See Fig Check the Electrical Grounding See FigOperating Checklist Adjusting the Spray PatternOperation Selecting a Fluid Nozzle and Air Cap Gun FunctionsMaintenance Adjusting the Turbine Air PressureDaily Care and Cleaning Activating the Voltage Select KV HI/LOClean the Air Cap and Fluid Nozzle Follow the Pressure Relief Procedure Warning onCheck for signs of fluid leakage where indicated by arrows Check for Fluid Leakage See FigSpray Pattern Troubleshooting Chart Problem Cause Solution Improper Spray PatternGUN Operation Troubleshooting Chart Problem Cause SolutionElectrical Troubleshooting Chart See Check the Electrical GroundingTest Power Supply Resistance See Fig Electrical TestsTest Gun Resistance See Fig 40dAir Cap/Nozzle/Resistor Stud Replacement Test Resistor Stud ResistanceService Notes ServiceFlush the Gun and Relieve Pressure Air Cap/Nozzle/Resistor Stud Replacement To install the resistor studElectrode Replacement Barrel Removal Barrel Installation Fluid Packing Rod Removal and Repair   Power Supply Removal and Replacement Power Supply AdjustmentTurbine Alternator Removal Replacement 40cSpray GUN Service Notes Manifold Service Notes Spray GUN Parts Drawing Detail aSpray GUN Parts List Part No -893, Series a Air Spray Gun, with standard shroudManifold Parts List Manifold Parts DrawingSure Relief Procedure on Installing the PRO 4600HC Conversion KitPRO 4600HC Conversion KIT Accessories Gun Mount Assembly Volt Power SupplyMount Extensions 224-255/259 Nylon Fabric CoverBulkhead Connector Grounding Clamp and WireFiber Optic Cables MegohmmeterTechnical Data Manual Change SummaryGraco Phone Numbers Graco Warranty and DisclaimersMINNEAPOLIS, MN

308-084, 4600SC, 224-094, 235-894, 235893 specifications

Graco Inc. is a renowned company in the manufacturing of fluid handling systems and products, particularly focusing on industrial, automotive, and contractors' markets. Among its extensive range of offerings are specific models that have garnered attention for their performance and reliability. This article highlights several Graco product numbers, including 224-224, 235893, 235-894, 224-094, and 4600SC.

The model 224-224 is recognized for its versatile usage in paint applications, capable of accommodating various material types. It is equipped with Graco's innovative technology that ensures consistent and precise fluid delivery, making it ideal for both professional contractors and DIY enthusiasts. The device often includes features like a lightweight structure for easy maneuverability and an ergonomic design for enhanced user comfort.

Moving to the model 235893, it presents impressive durability and optimal performance in high-pressure scenarios. This model is particularly popular among heavy-duty applications, thanks to its ability to withstand the rigors of demanding environments. With advanced component engineering, the 235893 ensures minimal downtime and enhances efficiency, making it a go-to choice for professionals in need of reliability under pressure.

The 235-894 model stands out due to its unique pump design that optimizes material flow and reduces overspray. This characteristic is crucial for achieving professional-grade finishes with reduced waste, saving both time and resources. Additionally, its user-friendly interface allows operators to adjust settings easily, catering to varied application needs.

Next, the 224-094 model is tailored for precision and versatility, featuring a compact design suitable for tighter spaces. It is engineered for efficiency, allowing for rapid color changes without compromising performance. The advanced filtration system integrated within this model ensures that contaminants are minimized, safeguarding the integrity of the materials being used.

Lastly, the 4600SC model exemplifies Graco’s commitment to innovation, specifically tailored for airless spray applications. It is equipped with cutting-edge technology that maximizes control over pressure and flow rate, allowing for seamless operation in different environments. The model’s ability to adapt to various paints and coatings while providing a superior finish adds to its appeal.

In summary, Graco Inc. provides a range of high-performance products like the 224-224, 235893, 235-894, 224-094, and 4600SC, each with distinctive features and technologies that cater to a broad spectrum of fluid handling needs. These models reflect the company’s dedication to enhancing efficiency, durability, and user experience in fluid management across various industries.
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