Pretul Spray Gun Manual

Contents

• Technical Data
• Pneumatic Requirements
• Safety Warnings for Pneumatic Tools
• Safety Warnings for Spray Guns
• Parts
• Preparation
• Start Up
• Maintenance
• Troubleshooting
• Notes

Technical Data

Pneumatic Requirements

For household jobs, a 1.5 CV compressor with a 5.2-gallon deposit is sufficient. For more demanding jobs like bodywork or industrial applications, a minimum of a 3 CV compressor with a 26.4-gallon deposit is recommended.

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

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

Diagram: An illustration shows an air compressor connected via a pressure 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 can cause accidents.
• Never use the tool in explosive environments or near flammable liquids. Sparks can cause explosion or fire.
• Keep children and visitors at a safe distance. Distractions can lead to loss of control and accidents.
• Avoid contact with power lines and circuits. Locate and avoid all electrical lines and circuits, especially hidden wires and grounded devices.
• Stay alert, be prudent, and use common sense. Do not become complacent with tool usage.
• Do not use the tool when tired or under the influence of drugs, alcohol, or medication. Distraction can cause severe injury.
• Use the tool with all guards and protective devices in place and in good working condition. Failure to do so may cause severe injuries.
• Secure and support the workpiece properly using bench vices and a stable working area.
• Do not force the tool. It will perform better and safer at its intended rate.
• Store the tool in a safe place away from children. Pneumatic tools are dangerous for inexperienced users.
• 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 comply can lead to severe personal injury.
• Use adequate personal protection: safety glasses, anti-dust mask, safety non-skid shoes, helmet, and earplugs.
• 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. This exposes you to severe personal injury.
• Do not overreach. Good footing and balance allow better control in unexpected situations.
• Never pull the air hose. Do not use it to carry or disconnect the tool. Damaged or tangled hoses can burst and shoot residues.
• Avoid accidental start-up. Ensure the air supply is switched off before connecting or moving the tool.
• Remove any adjustment wrenches before starting the tool. Additional tools or vices on moving parts 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 any damaged parts immediately.
• 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.

Safety Warnings for the Use of Spray Guns

Substances and Materials

The unit is designed to apply covering materials like paint, varnish, enamel, etc., with an ignition point not lower than 70°F. Check the product label or container.

WARNING: Do not spray substances you are unfamiliar with or whose potential danger is unknown.

WARNING: Do not spray flammable substances. Use care with dangers arising from sprayed substances. Read the text and information on cans and containers or manufacturer specifications.

Before operating the unit

CAUTION: The unit shall not be used in enclosed or explosive environments.

If working outdoors, consider wind direction. Wind can carry the covering over long distances, causing damage and making the job difficult.

CAUTION: If working indoors, ensure adequate ventilation.

WARNING: The work area must be free of any ignition source. Do not smoke while spraying or near the work area.

CAUTION: Wear a face mask and safety goggles when spraying to prevent lung and eye damage.

Wearing gloves and an overall is recommended to protect hands and clothes from the product being applied.

While operating the device

CAUTION: Never point the sprayer towards yourself, other people, or animals.

Ensure the equipment does not absorb any steam solvent.

CAUTION: If you need to pause during the application process, do not set the sprayer sideways. Hold it by the hook or a suitable place to keep it vertical.

After operating the unit

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

Parts

Diagram: An exploded view of the spray gun with labeled parts:

• Needle
• Spring
• Adjusting Nut
• Hook
• Nozzle
• Regulator
• Liquid Nozzle
• Jar Cover
• Suction Pipe
• Filter
• Jar
• Trigger
• Grip
• Air Inlet

Preparation

For a good job, it is important to prepare the surface to be sprayed and thin the paint or product to achieve the correct viscosity before application.

• Always ensure the surface is free of dust, dirt, or grease.
• Cover areas not requiring spraying with adhesive tape, newspaper, and/or plastic.
• The paint or product to be sprayed should be mixed perfectly before filling the jar to prevent settling and lumps.
• Always review the manufacturer's recommendations before purchasing the product.

Thinning the material

Most paints are sold ready for brush application and need thinning for spray gun use. Follow the manufacturer's instructions.

Add 5% to 10% thinner until the right viscosity is achieved. Use a DIN 4 viscosity flow cup (not included) to determine viscosity by timing the discharge of the material. The following table provides recommended times:

If the dispersion capacity is too low after thinning, add thinner gradually (5-10%) until it meets your needs.

If the paint is too thick, the surface may appear rough (orange peel). If too thin, there is a risk of dripping.

Filling the Jar

• Unscrew the paint gun jar.
• Align the suction pipe according to the job: forward (A) for horizontal spraying, backward (B) for spraying overhead.
• Place the jar on newspaper. Pour the covering material and firmly tighten the jar onto the paint gun.

Start Up

Volume Selector

• Turn the adjusting screw (A) counterclockwise to increase material volume.
• Turn the adjusting screw clockwise to decrease material volume.

Spraying Techniques

• Keep the gun level and parallel to the surface (C), maintaining a nozzle distance of 10"-14". Spray evenly in all directions. Avoid spraying at an angle to prevent paint runs. Use soft, uniform passes. For large surfaces, use a crossed pattern (D).
• Move the gun at a steady, uniform speed. Fast movements create thinner layers; slow movements create thicker layers.
• Apply one layer at a time. For a second layer, consult the product manufacturer's drying recommendations. Applying two thin layers is better than one thick layer for a better finish.
• For small areas, turn the adjusting screw to reduce material volume to prevent over-spraying.
• Avoid pausing while spraying an object for a uniform application.
• Do not tilt the spray gun at an angle greater than 45°.

Starting the compressor

• Start the compressor.
• Press the trigger (B) to open the air flow and start suctioning product from the jar. Point the spray gun at a piece of cardboard until the spray flows.
• Release the trigger to stop the spray flow.

Maintenance

Cleansing and Care

It is crucial to clean the spray gun thoroughly after each use. Inadequate cleaning can lead to malfunction and void the warranty.

• Turn the jar to remove it from the gun. Press the trigger to remove remaining product from the system (A).
• Pour the leftover material into an adequate container.
• Disconnect the paint gun hose.
• Clean the jar, gasket seal, and suction pipe with a rag soaked in the appropriate solvent for the product.
• Disassemble the regulator, sprayer, nozzle, and needle. Clean them with a brush and solvent.
• Clean the spray gun body with a solvent-moistened rag.
• CAUTION: Do not immerse the gun in solvent, as the gaskets may get damaged.
• Once parts are clean, reassemble the spray gun.
• Pour a small amount of solvent into the jar.
• Connect the hose to the spray gun.
• Start the compressor and spray into a container until clean solvent exits the nozzle.

Needle Seal

Pay special attention to adjusting the needle seal for optimal results.

• Adjust the needle seal using a wrench (not included) (B).
• Periodically check the seal for damage. To access the seal, remove the needle and the seal pressing piece (C).

Troubleshooting

Notes

Imported by Truper, S.A. de C.V.

Parque Industrial 1, Parque Industrial Jilotepec, Jilotepec, Edo. de Méx. C.P. 54257. Made in China.

Tel.: 76 1782 9100. www.truper.com

11-2021