Harbor Freight Tools 93974 User Manual
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 questions and replacement parts, please call 1-800-444-3353
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 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 these tools in damp or wet locations.
Don’t expose to rain. Keep work area well lighted. Do not use electrically powered
compressors 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, paint, 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. Protective, electrically non-conductive clothes and non-skid footwear
are recommended when working. Wear restrictive hair covering to contain long hair.
7. Use eye protection. Always wear ANSI approved impact safety goggles.
Wear an ANSI approved dust mask or respirator when working around
chemical dusts, paints and mists.
8. Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across running machines or air hoses.
SKU 93974
For technical questions, please call 1-800-444-3353
Page 2
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 tool before connecting it 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 any 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.
SKU 93974
For technical questions, please call 1-800-444-3353
Page 3
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,
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 performance.
et seq.
)
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.
SKU 93974
For technical questions, please call 1-800-444-3353
Page 4
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, oil, or other contaminants along with
the compressed air. Condensation cause “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 to connect to the air inlet on either the
Large or Small Sprayers. First, wrap the Air Inlet (40 or 23a; shown on next page) with
pipe thread seal tape before threading it into the 1/4” air connector. Connect the 1/4” ID
Air Source Hose to the Spray Gun.
2. Set the air pressure on your compressor to the recommended pressure for the spray
gun used, as mentioned on page 2. Do not exceed the maximum recommended air
pressure of 40 PSI for the large gun and small gun.
3. Check the air connection for leaks and then
Note: This unit comes with a 1/4”-18 NPS (IN/OUT) x 25’ Recoil Air Hose which you
may use to connect from the air inlet to the air hose/compressor to give you more
flexibility.
disconnect the tool from the air source.
SKU 93974
For technical questions, please call 1-800-444-3353
Page 5
Air Cap (1a)
Small Spray Gun
Trigger (14a)
Pattern Control Knob (12a)
Air Inlet (23a)
Fluid Control Knob (28a)
Fluid Nozzle (4a)
Paint Cup (34a)
Figure 1
Air Cap Set (1S)
Cup (47)
Trigger (38)
Large Spray Gun
Pattern Control Knob (13)
Fluid Control
Knob (29)
Air Inlet (40)
SKU 93974
For technical questions, please call 1-800-444-3353
Page 6
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