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37 PIECE SPRAY GUN KIT
Model 93974
ASSEMBLY and OPERATING INSTRUCTIONS
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our Web site at http://www.harborfreight.com
TO PREVENT SERIOUS INJURY,
READ AND UNDERSTAND ALL WARNINGS
AND INSTRUCTIONS BEFORE USE.
®
Copyright © 2006 by Harbor Freight Tools . All rights reserved. No portion of this
manual or any artwork contained herein may be reproduced in any shape or form
without the express written consent of Harbor Freight Tools.
For technical
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Specifications Operating PSI 50-70 PSI (Large Gun); 30-50 PSI (Small Gun) Air Consumption 16 SCFM (Large Gun); 8 SCFM (Small Gun) Spray Guns 1 Large Spray Gun with 32 oz. paint cup; 1.8mm nozzle 1 Small Spray Gun with 7 oz. paint cup; 1.5mm nozzle Air Inlet (Both Guns) 1/4” NPS Materials Cast Aluminum Gun Bodies; Brass Nozzle & Fittings; Sheet Metal Trigger (Large Gun); Cast Zinc Trigger (Small Gun); Spun Aluminum Paint Cups; Polyurethane Air Hose Save This Manual You will need the manual for t
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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 handles 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. 11. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are removed from the t
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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 wi
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Unpacking When unpacking, check to make sure the parts listed on pages 14 and 16 are included. 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. Air Connection Spray Gun 1/4” NPS 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,
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Small Spray Gun Trigger (14a) Pattern Control Knob (12a) Air Inlet (23a) Fluid Control Knob (28a) Air Cap (1a) Fluid Nozzle (4a) Paint Cup (34a) Large Spray Gun Figure 1 Pattern Control Knob (13) Air Cap Set (1S) Trigger (38) Fluid Control Knob (29) Air Inlet (40) Cup (47) Page 6 SKU 93974 For technical questions, please call 1-800-444-3353
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Preparation 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. Note: Proper paint material mixture helps to ensure less problems. Be sure to follow the manufacturer’s directions. Most materials w
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Fan Direction and Pattern Adjustment Note: Always make sure the Vent (48-on the large spray gun) is clear and unclogged. Fan Direction To change the direction of the fan from horizontal to vertical, loosen the Lock Ring and turn the Air Cap (1 or 1a) 90 degrees. After the adjustment, tighten the Lock Ring by hand. See FIGURE 2 below. Lock Ring Horizontal Fan FIGURE 2 Air Cap Vertical Fan Pattern Adjustment Warning!! Never exceed the Maximum Inlet PSI of 40 PSI. 1. If you need to reduce the air
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Fan Direction and Pattern Adjustment (continued) 3. Turn the Fluid Control Knob (28a or 29) clockwise until it is fully closed. See FIGURE 1 on page 6. 4. After setting up a piece of scrap material, squeeze the Trigger in short bursts while turning the Fluid Control Knob 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 mater
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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 5). Pull the Trigger 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
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Operation Paint and Materials Preparation Verify with the paint or materials supplier the percentage of thinning required for use with these Sprayers. Try thinning a small amount and testing the spray action. Thoroughly mix material before testing. Viscosity Viscosity is the technical term used to indicate the liquidity (thickness or thinness) of the material being sprayed. Viscosity is measured in the number of seconds required for the material to pass through the viscosity tester (not includ
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IMPORTANT: The Spray Gun must be cleaned IMMEDIATELY after use. Improper cleaning is a common reason for the Spray Gun not to work properly. Materials dry quickly which will render the gun useless. It is extremely difficult to remove dry paint from small passages within the Gun. Maintenance SOLVENT SELECTION Always follow the paint manufacturer’s recommendations for cleaning, solvent type, and disposing of used solvent. Latex Paints: Use warm, soapy water. IMPORTANT: Do not use mineral spirit
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Maintenance (continued) Disconnect from the air source. Warning! The Paint Cup and Spray Gun may still hold air pressure, fire the Spray Gun toward scrap material until all of the pressure is expended. 1. Remove the Paint Cup. 2. Pour residual paint into the paint container and seal it. 3. Pour non-flammable paint thinner into the Paint Cup. If water based paint was used, you can use water. 4. Secure the Paint Cup to the appropriate Gun and shake the liquid in the cup. 5. Connect to the air so
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Parts List, Large Gun NOTE: Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts. Page 14 SKU 93974 For technical questions, please call 1-800-444-3353
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Page 15 SKU 93974 For technical questions, please call 1-800-444-3353
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Parts List, Small Gun Note: When ordering parts from this diagram add an “A” suffix. For example Air Cap is part number 1A. Air Inlet Fluid Control Knob Pattern Control Knob Diagram Page 16 SKU 93974 For technical questions, please call 1-800-444-3353
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Warranty Card LIMITED 1 YEAR WARRANTY Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that this product is free from defects in materials and workmanship for the period of one year from the date of purchase. This warranty does not apply to damage due directly or indirectly to misuse, abuse, negligence or accidents; repairs or alterations outside our facilities; or to lack of maintenance. We
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Troubleshooting Spray Pattern Diagnosis The Patterns below resemble symptoms of spray pattern problems. Please refer to the accompanying possible problems if you are experiencing similar difficulties. The solution to each problem follows the problem in parentheses. Problem 1: 1. The Pattern Control Knob (13) or (12a) is partially closed. (Open Pattern Control Knob.) 2. The material is too thick. (Thin material according to the manufacturer’s instructions.) 3. The air pressure is too low. (
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Troubleshooting (continued) Problem Cause Solution 1. Low material level 1. Refill 2. Cup tipped too far 2. Hold upright 3. Clogged Air Vent 3. Clean vent hole Sputtering Spray 4. Loose fluid inlet connections 4. Tighten 5. Dry or loose fluid needle Packing Nut 5. Lubricate and/or tighten 6. Loose/damaged fluid tip/seat 6. Adjust or replace 1. No pressure at gun 1. Check air hoses 2. Fluid control not open enough 2. Open fluid control Will Not Spray 3. Fluid too thick 3. Thin
