Truper Gravity Feed Spray Gun Manual

Technical Data

Pneumatic Requirements

For household jobs, 1.5 CV compressors with a 25-liter deposit are sufficient. For more demanding jobs like bodywork or industrial applications, 3 CV compressors with a 100-liter deposit are recommended.

Use high-pressure hoses of adequate length for comfortable operation.

CAUTION: Dust and water condensation inside the compressor tank can lead to a deficient finish. Install a regulating filter between the compressor and the gun to prevent this.

Diagram: An illustration shows an air compressor connected via an air hose to a regulating filter, which then connects to the spray gun.

Safety Warnings for the Use of Pneumatic Tools

• Keep your work area clean, tidy, and well-lit. Cluttered and dark areas increase the risk of accidents.
• Never use the tool in explosive environments or near flammable liquids. Sparks can cause explosions or fires.
• Keep children and visitors at a safe distance. Distractions can lead to loss of control and accidents.
• Avoid contact with power lines and circuits. Identify and avoid hidden wires and grounded devices.
• Stay alert, use care, and common sense. Do not rely solely on your knowledge of the tool and avoid distractions.
• Do not use the tool when tired or under the influence of drugs, alcohol, or medication. A moment of distraction can cause serious injury.
• Use the tool with guards and protective devices in place and in good working condition. Failure to do so may cause serious injury.
• Secure and support the workpiece properly. Use bench vices and a stable working area.
• Do not force the tool. It will perform better and safer at the rate for which it was intended.
• Store the tool in a safe place away from children. Pneumatic tools are dangerous in inexperienced hands.
• Dress properly. Loose clothing, jewelry, or long hair can get caught in moving parts.
• Keep your hands away from rotating and/or mobile parts. Failure to do so exposes you to severe personal injury.
• Use adequate personal protection. Safety glasses, anti-dust mask, safety non-skid shoes, helmet, and earplugs reduce the risk of injury.
• Disconnect the air hose from the tool before servicing, changing devices, or storing. This reduces the risk of unintentional starting.
• Never use a tool if the switch is not working or is not properly assembled. You risk severe personal injury.
• Do not overreach. Good footing and balance provide better control in unexpected situations.
• Never pull the air hose. Do not use it to carry or disconnect the tool from the air supply. Damaged or tangled hoses can burst and shoot residues towards the operator.
• Avoid accidental start-up. Ensure the air supply tool is switched off before connecting or moving the tool.
• Remove vices before starting the tool. Additional tools or vices set into a moving part can cause severe injury.
• Service the tool and verify it is in excellent working condition. Periodically check moving parts, alignment, and assembly. Repair or replace damaged parts immediately.
• Accessories: Use only accessories or spare parts recommended in this manual or certified by Truper.
• Never leave a running tool unattended. Switch off and disconnect the tool from the air supply after operating and before putting it aside to avoid severe injury.

Safety Warnings for the Use of Gravity Feed Spray Guns

Substances and Materials

• The unit is designed for covering materials like paint, varnish, and enamel with an ignition point not lower than 70°F (21°C). Check product labels.
• Do not spray substances you are unfamiliar with or whose potential danger is unknown.
• Do not spray flammable substances. Be aware of dangers from sprayed substances and read manufacturer specifications.

Before Operating the Unit

• Do not use the unit in enclosed or explosive environments.
• When working outdoors, consider wind direction, as it can carry the coating over long distances, causing damage and making the job difficult.
• When working indoors, ensure adequate ventilation.
• The work area must be free of any ignition source. Do not smoke while spraying or near the work area.
• Wear a face mask and safety goggles to prevent lung and eye damage.
• Wearing gloves and an overall is recommended to protect hands and clothes from the product.

While Operating the Device

• Never point the sprayer towards yourself, others, or animals.
• Ensure the equipment does not absorb any steam solvent.
• If pausing during application, do not set the sprayer sideways. Hold it by the hook vertically.

After Operating the Unit

• When finishing the job, clean the gun thoroughly to eliminate any product residue. Accumulations can damage the gun and void the warranty.

Parts

The manual includes an exploded view diagram of the spray gun and its components, with labels for each part:

• Cap
• Jar
• Jar to Gun Connection
• Gasket
• Needle
• Sprayer (Nozzle)
• Liquid Nozzle
• Hook
• Trigger
• Paint Flow Regulating Screw
• Fan Regulating Screw
• Spring
• Air Flow Regulating Screw
• Grip
• Air Inlet
• Nut (Included accessories)
• Wrench
• Spike
• Brush

Preparation

• Proper surface preparation is crucial for a good finish. Thin the paint or product to achieve the correct viscosity before application.
• Ensure the surface to be sprayed is free of dust, dirt, and grease.
• Cover areas not requiring spraying with adhesive tape, newspaper, and/or plastic.
• Mix the paint or product thoroughly before filling the jar to prevent settling and lumps.
• Read manufacturer recommendations before purchasing products.

Thinning the Material

• Most paints are ready for brush application and need thinning for spray guns. Follow manufacturer instructions.
• Add 5-10% thinner until the desired viscosity is reached.
• Use a DIN 4 viscosity flow cup (not included) to determine the correct viscosity. Viscosity is measured by the time it takes for the material to discharge. The table provides recommended times for different products:
  • Water based Paint: 20-25 seconds
  • Primer: 24-28 seconds
  • Varnish: 20-25 seconds
  • Oil Based Paint: 18-22 seconds
  • Enamel Paint: 18-22 seconds
  • Aluminum Paint: 22-25 seconds
  • Automotive Sealant: 25-35 seconds
  • Wood Sealant: 28-35 seconds
  • Wood Preserver: Thinning not required
  • Wood Stain: Thinning not required
• If dispersion capacity is too low after thinning, add 5-10% more thinner gradually.
• If the paint is too thick, the finish will be rough (orange peel). If the paint is too liquid, it may drip.

Filling the Jar

• Unscrew the jar and fill with paint. Close the cap to prevent spilling.
• The jar can be refilled during the painting process.
• Do not tilt the jar more than 30° from the vertical to ensure continuous paint flow (A).
• If the job requires tilting the gun more than 30°, adjust the jar to compensate and maintain paint flow (B).

Start Up

Adjusts

• During the adjustment process and before applying paint, perform tests on scrap material to achieve the correct paint flow.
• Turn adjusting screw (A) counterclockwise to increase material volume.
• Turn adjusting screw (A) clockwise to decrease material volume.
• Turn adjusting screw (B) to modify the fan pattern for paint application.
• Turn adjusting screw (C) to modify the air flow for paint application.
• Turn the sprayer (D) to determine the angle of the spray pattern.

Turning On

• Turn on the compressor.
• Press the trigger (E) to open the air flow and start suctioning product from the jar. Aim the gun at cardboard until spraying begins.
• Release the trigger to stop spraying.

Spraying Techniques

• Keep the gun parallel to the surface (F) for best results. Maintain a nozzle distance of 7.8” - 12” (20-30 cm). Spray evenly with smooth, consistent passes, moving side-to-side and up-and-down. Do not spray at an angle to the surface, as this can cause paint runs. For large areas, use a cross pattern (G).
• Displace the gun at a uniform and constant speed. Fast movements create thin layers; slow movements create thick layers.
• Apply one layer at a time. Refer to manufacturer recommendations for drying times before applying a second layer. Applying two thin layers is better than one thick layer for a better finish.
• When spraying small areas, adjust the screw to reduce material volume. This conserves paint and prevents overspray.
• To ensure even application, avoid pausing while spraying.
• Diagrams: Illustrations show different fan patterns (vertical, inclined, horizontal) and spraying techniques (parallel motion, cross pattern).

Maintenance

Cleansing and Care

• Thoroughly clean the paint gun after each use. Inadequate cleaning can lead to malfunction and void the warranty.
• Without removing the jar, press the trigger to remove all product from the system.
• Pour remaining material into an appropriate container.
• Disconnect the paint gun hose.
• Clean the jar, gasket seal, and suction pipe with a rag soaked in the appropriate solvent.
• Disassemble and clean the regulator, sprayer, nozzle, and needle with a brush and solvent.
• Clean the paint gun body with a solvent-moistened rag.
• CAUTION: Do not immerse the gun in solvent, as gaskets may get damaged.
• Reassemble the paint gun after cleaning the parts.
• Pour a small amount of solvent into the jar, connect the hose, and spray into a container until clean solvent exits the nozzle.

Needle Seal

• Adjust the needle seal with care for optimal results.
• Use the wrench to adjust the needle seal (A).
• Periodically check the seal for damage. To access the seal, remove the needle and the seal pressing part (B).

Troubleshooting

Warranty

This product is guaranteed for 10 years against manufacturing defects, functionality, and workmanship. To validate the warranty or obtain parts/replacements, present the product at the point of purchase or contact Truper.

Contact Information:

• Website: www.truper.com
• Customer Service: 800 018 7873

Imported by: Truper, S.A. de C.V., Parque Industrial 1, Parque Industrial Jilotepec, Jilotepec, Edo. de Méx. C.P. 54257. Made in China.

Notes

Blank lined pages for notes.