Central Pneumatic 43760 User manual

ASSEMBLY AND OPERATING

INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at http://www.harborfreight.com

artwork contained herein may be reproduced in any shape or form without the express written

consent of Harbor Freight Tools.

For technical questions and replacement parts, please call 1-800-444-3353.

TO PREVENT SERIOUS INJURY,

READ AND UNDERSTAND ALL WARNINGS

AND INSTRUCTIONS BEFORE USE.

Due to continuing improvements, actual product may differ slightly from the product described herein.

PAINT SPRAY GUN

43760

Manual revised 08/05

For technical questions, please call 1-800-444-3353;

Troubleshooting section at end of manual.

SKU 43760 Page 2

Unpacking

When unpacking, check to make sure the product is intact and undamaged. If any parts are

missing or broken, please call Harbor Freight Tools at the number on the cover of this

manual as soon as possible.

Contents

Unpacking ................................................................................................... 2

Specifications ............................................................................................. 3

Safety Warnings and Precautions............................................................. 3

Air Connection............................................................................................ 6

Control Layout ............................................................................................ 6

A Comparison: Conventional versus HVLP Spray Guns ........................ 7

Preparation ................................................................................................. 7

Fan Direction and Pattern Adjustment ..................................................... 8

Techniques................................................................................................. 10

Maintenance............................................................................................... 11

Parts List .................................................................................................... 12

Assembly Diagram .................................................................................... 13

Troubleshooting ........................................................................................ 14

REV 12/05

IMPORTANT: Before using for the first time, the spray gun must be cleaned

using a solvent based thinner. If not removed, the red oil used by the

manufacturer for testing and corrosion protection may contaminate paint.

IMPORTANT: The Spray Gun must be cleaned immediately after use.

Improper cleaning is a common reason for the Spray Gun not to work.

For technical questions, please call 1-800-444-3353;

Troubleshooting section at end of manual.

SKU 43760 Page 3

Specifications

Save This Manual

You will need the manual for the safety warnings and precautions, assembly instructions,

operating and maintenance procedures, parts list and diagram. Keep your invoice with this

manual. Write the invoice number on the inside of the front cover. Keep the manual and

invoice in a safe and dry place for future reference.

Safety Warnings and Precautions

WARNING: When using tool, basic safety precautions should always be followed to

reduce the risk of personal injury and damage to equipment.

Read all instructions before using this tool!

1. Keep work area clean. Cluttered areas invite injuries.

2. Observe work area conditions. Do not use machines or power tools in damp or wet

locations. Don’t expose to rain. Keep work area well lit. Do not use air tools in the

presence of flammable gases or liquids.

3. Keep children away. Children must never be allowed in the work area. Do not let

them handle machines, tools, extension cords, or air hoses.

4. Store idle equipment. When not in use, tools must be stored in a dry location to inhibit

rust. Always lock up tools and keep out of reach of children.

5. Use the right tool for the job. Do not attempt to force a small tool or attachment to do

the work of a larger industrial tool. There are certain applications for which this tool

was designed. It will do the job better and more safely at the rate for which it was

intended. Do not modify this tool and do not use this tool for a purpose for which it was

not intended.

6. Dress properly. Do not wear loose clothing or jewelry as they can be caught in moving

parts. Protective, electrically nonconductive clothes and nonskid footwear are

recommended when working. Wear restrictive hair covering to contain long hair.

7. Use eye and ear protection. Always wear ANSI approved impact safety goggles

and a dust mask/respirator when using this Spray Gun.

8. Do not overreach. Keep proper footing and balance at all times. Do not reach over or

across running machines or air hoses.

Inlet PSI Range 20-55 PSI, 55 PSI Max.

Air Consumption 6 CFM

Paint Capacity 1 Quart

Air Inlet 1/4” - 18 NPS

Nozzle Size .082”

Feed Type Siphon

For technical questions, please call 1-800-444-3353;

Troubleshooting section at end of manual.

SKU 43760 Page 4

9. Maintain tools with care. Keep tools clean for better and safer performance. Follow

instructions for lubricating and changing accessories. Inspect tool cords and air hoses

periodically and, if damaged, have them repaired by an authorized technician. The

handle must be kept clean, dry, and free from oil and grease at all times.

10. Disconnect air supply. Disconnect air hose when not in use, when changing

accessories, and during maintenance.

11. Remove adjusting wrenches. Check that adjusting wrenches are removed from the

tool before attaching to the air source.

12. Avoid unintentional starting. Be sure the trigger is in the Off position when not in use

and before attaching to the air source. Do not carry any tool with your finger on the

trigger, whether it is attached to the air compressor or not.

13. Stay alert. Watch what you are doing, use common sense. Do not operate any tool

when you are tired.

14. Check for damaged parts. Before using any tool, any part that appears damaged

should be carefully checked to determine that it will operate properly and perform its

intended function. Check for alignment and binding of moving parts; any broken parts

or mounting fixtures; and any other condition that may affect proper operation. Any part

that is damaged should be properly repaired or replaced by a qualified technician. Do

not use the tool if the trigger does not operate properly.

15. Replacement parts and accessories. When servicing, use only identical replacement

parts. Use of any other parts will void the warranty. Only use accessories intended for

use with this tool. Approved accessories are available from Harbor Freight Tools.

16. Do not operate tool if under the influence of alcohol or drugs. Read warning labels

if taking prescription medicine to determine if your judgement or reflexes are impaired

while taking drugs. If there is any doubt, do not operate the tool.

17. Use proper size and type extension cord. If an extension cord is required for the

compressor, it must be of the proper size and type to supply the correct current to the

compressor without heating up. Otherwise, the extension cord could melt and catch

fire, or cause electrical damage to the compressor. Check your compressor’s manual

for the appropriate size cord.

18. Maintenance. For your safety, maintenance should be performed regularly by a qualified

technician and the unit must be thoroughly cleaned out after every use. Improper

cleaning of the Spray Gun is a common reason for the Spray Gun to jam or not

perform properly.

19. Compressed air only. Never use combustible gas as a power source. Never exceed

the recommended operating pressure of the any of the parts (i.e. hoses, fittings, gun)

of the Sprayer system.

20. Do not spray near open flames, pilot lights, stoves, heaters, the air compressor,

or any other heat source. Most solvents and coatings are highly flammable, particularly

when sprayed. Maintain a distance of at least 25 feet from the air compressor. If

possible, locate the air compressor in a separate room. Do not smoke while spraying.

For technical questions, please call 1-800-444-3353;

Troubleshooting section at end of manual.

SKU 43760 Page 5

21. Read all of the information concerning coating products and cleaning solvents.

Chlorinated solvents (e.g. 1-1-1 Trichlorethylene and Methylene Chloride, also known

as methyl chloride) can chemically react with aluminum and may explode. Many paint

sprayers contain aluminum. If you have any doubt about potential chemical reactions,

contact the solvent or coating manufacturer.

22. Materials used when painting or cleaning may be harmful or fatal if inhaled or

swallowed. Only use in an area with adequate ventilation. Use a respirator or mask

when painting or using cleaning solvents.

23. Never release the sprayer lid while the cup is pressurized.

24. Industrial applications must follow OSHA requirements.

25. Never point a spray gun at a person or animal. Serious injury could occur.

26. Spraying hazardous materials may result in serious injury or death. Do not spray

pesticides, acids, corrosive materials, fertilizers, and toxic chemicals.

27. WARNING: The brass components of this product contain lead, a chemical known to

the State of California to cause birth defects (or other reproductive harm).

(California Health & Safety Code § 25249.5,

et seq.

)

Note: Performance of the compressor (if powered by line voltage) may vary depending

on variations in local line voltage. Extension cord usage may also affect tool perfor-

mance.

WARNING: The warnings, cautions, and instructions discussed in this instruction

manual cannot cover all possible conditions and situations that may occur. It must be

understood by the operator that common sense and caution are factors which cannot

be built into this product, but must be supplied by the operator.

For technical questions, please call 1-800-444-3353;

Troubleshooting section at end of manual.

SKU 43760 Page 6

Air Connection

For best service you should incorporate a regulator and inline filter, as shown in the diagram

above. Hoses, couplers, regulators, and filters are all available at Harbor Freight Tools.

Note: Compressor pumps discharge condensed water, oil, or other contaminants along with

the compressed air. Condensation causes “fish eyes” to appear in paint patterns. To avoid

this problem, install water/oil removal filters and controls (not included) as close to the Spray

Gun as possible. If run through the Gun, water and oil will cause damage.

1. You will need to prepare a 1/4” air connector (sold separately) to connect to the air inlet

on the Spray Gun. First, wrap the 1/4” air connector (not included) with pipe thread seal

tape before threading it into the Air Inlet (34). Connect the 3/8” ID Air Source Hose to

the Spray Gun.

2. Set the air pressure on your compressor to 20-55 PSI. Do not exceed the maximum air

pressure of 55 PSI.

3. Check the air connection for leaks and then disconnect the tool from the air source.

Trigger (32)

Air Inlet (34)

Fluid Control

Knob (15)

Pattern Control Knob (14)

Cup (43)

Air Cap Set (1)

Control Layout

FIGURE 1

For technical questions, please call 1-800-444-3353;

Troubleshooting section at end of manual.

SKU 43760 Page 7

Preparation

Note: Proper paint material mixture helps to ensure less problems. Be sure to follow the

manufacturer’s directions. Most materials will spray readily if they are thinned properly.

General tips for Preparation:

1. Mix and thin the paint/materials thoroughly according to the manufacturer’s directions.

Do not use latex paints with this Spray Gun.

2. Carefully strain the paint/material through a paint strainer or piece of cheese cloth.

3. Swing the Cup Locking Lever (39) out of the locked position to remove the Cup (43)

from the Unit. Fill the Cup (43) to approximately 3/4 full. Place the Cup (43) back on

the unit and swing the Cup Locking Lever (39) to the locked position.

4. Start the air compressor.

5. To adjust the spray pattern, set up a piece of scrap material to practice on. While

practicing on the scrap material, check to see that the material you are spraying has

the appropriate consistency. If it appears to thin, add a very small amount of thinner

(not included). BE CAREFUL when thinning. Proceed slowly, adding very minimal

amounts. NEVER exceed the manufacturer’s thinning recommendations.

A Comparison: Conventional versus HVLP Spray Guns

Because conventional spray guns require a much higher air cap pressure to atomize

the paint than HVLP Spray Guns, conventional guns have lower transfer efficiencies

and more overspray.

This translates to a significant paint/material savings for HVLP guns, in addition to

making them more environmentally friendly.

To qualify as HVLP, the dynamic air pressure going in the Air Cap must be a maximum

of 10 PSI. The lower the air pressure, the less bounce back and overspray.

See FIGURE 2 below.

Conventional

HVLP

FIGURE 2

For technical questions, please call 1-800-444-3353;

Troubleshooting section at end of manual.

SKU 43760 Page 8

Fan Direction and Pattern Adjustment

Fan Direction

To change the direction of the fan from horizontal to vertical, loosen the Lock Ring and

turn the Air Cap (1) 90 degrees. After the adjustment, tighten the Lock Ring by hand.

See FIGURE 3 below.

Pattern Adjustment

Warning!! Never exceed the Maximum Inlet PSI of 55 PSI.

1. If you need to reduce the air pressure for specific areas, adjust the air compressor.

2. To set the pattern size specific to the job, use the Pattern Control Knob (14) (see

FIGURE 1 on page 6). By turning it counterclockwise (all the way open), the pattern

will flatten. Turn the Pattern Control Knob (14) clockwise for a round pattern.

See FIGURE 4 below.

Flat/Open Round/Closed

FIGURE 4

Note: Always make sure the Vent (45) is clear and unclogged.

REV 12/05

IMPORTANT: Before using for the first time, the spray gun must be cleaned

using a solvent based thinner. If not removed, the red oil used by the

manufacturer for testing and corrosion protection may contaminate paint.

IMPORTANT: The Spray Gun must be cleaned immediately after use.

Improper cleaning is a common reason for the Spray Gun not to work.

FIGURE 3

Horizontal Fan

Vertical Fan

Air Cap

Lock Ring

For technical questions, please call 1-800-444-3353;

Troubleshooting section at end of manual.

SKU 43760 Page 9

3. Turn the Fluid Control Knob (15) clockwise until it is fully closed. See FIGURE 1 on

page 6.

4. After setting up a piece of scrap material, squeeze the Trigger (32) in short bursts while

turning the Fluid Control Knob (15) counterclockwise and observe the spray patterns

until you see the pattern you want. Also, look at the pattern for consistency. Too much

air may cause the spray to come out too fine. Reduce the air pressure or allow more

material to come out by opening the Fluid Control Knob (15). If the spray appears too

thick (you see globs of paint), close down the Fluid Control Knob (15) slowly, checking

the mixture after each adjustment.

See FIGURE 5 below.

FIGURE 5

Too Fine

(Loosen)

Too Coarse

(Tighten) Correct

Fan Direction and Pattern Adjustment (continued)

For technical questions, please call 1-800-444-3353;

Troubleshooting section at end of manual.

SKU 43760 Page 10

2. To ensure you don’t allow paint to build up, start moving the Spray Gun before you

Squeeze the Trigger (32). When you are finished spraying, release the Trigger (32)

before you stop moving the Spray Gun. Doing so will eliminate distinct overlaps,

producing a blended (feathered) affect. See FIGURE 7 below.

Techniques

Note: Before spraying, mask all objects you do not want sprayed and lay cloths (not included)

on the floors.

1. Always keep the gun at right angles to the workpiece (See FIGURE 6). Pull the Trigger

(32) slowly and move the Spray Gun in parallel strokes to the object being painted.

Keep the distance from the object being painted at 6” to 9”. This may slightly differ

depending on the flow adjustment and the material being sprayed. Do not stop the gun

movement while spraying. If you stop the gun for even just a slight pause while spraying,

the paint will build up and run down the workpiece.

Note: The speed of the stroke, the adjustment of the Fluid Control Knob (15), and the distance

from the workpiece, will determine how much paint is being applied. To get the best

results, try to apply two thin coats of paint versus one thick coat.

3. Clean out the gun thoroughly after EVERY use, according to the instructions

found on the next page.

FIGURE 6

Correct (90o)

Incorrect

(Heavier coat on one

side, uneven coverage)

(Even coverage)

FIGURE 7

(Top View)

End

Stroke

Begin

Stroke Release

Trigger (32)

Squeeze

Trigger (32)

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