ELECTRIC PAINT
SPRAY GUN
Model 47274
ASSEMBLY and OPERATING
INSTRUCTIONS
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
Copyright © 2002 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
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8. Use eye and ear protection. Always wear ANSI approved impact safety goggles.
Wear an ANSI approved respirator when working around metal, wood, and chemical
dusts, mists, paints, oils, sealers, and stains.
9. Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across running machines.
10. Maintain tools with care. Keep tools clean for better and safer performance. Follow
instructions for lubricating and changing accessories. Inspect tool cords 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.
11. Avoid unintentional starting. Be sure the switch is in the Off position when not in
use and before plugging in. Do not carry any tool with your finger on the trigger,
whether it is plugged in or not.
12. Stay alert. Watch what you are doing, use common sense. Do not operate any tool
when you are tired.
13. 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 switch does not turn On and Off properly.
14. Guard against electric shock. Prevent body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerator enclosures.
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 on prescriptions to determine if your judgment 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, it must
be of the proper size and type to supply the correct current to the tool without heating
up. Otherwise, the extension cord could melt and catch fire, or cause electrical
damage to the tool. This tool requires use of an extension cord of 0 to 10 amps
capability (up to 50 feet), with wire size rated at 18 AWG. Longer extension cords
require larger size wire. If you are using the tool outdoors, use an extension cord
rated for outdoor use (signified by “WA” on the jacket).
18. Maintenance. For your safety, maintenance should be performed regularly by a
qualified technician.
19. WARNING: This product contains or, when used, produces a chemical known to the
State of California to cause cancer and birth defects or other reproductive harm.
- An example of these chemicals is lead from lead-based paints.
SKU 47274
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- Stains, oil-based paints, thinners, sealers, and water-proofers.
Your risk from these exposures varies, depending on how often you do this type of
work. To reduce your exposure to these chemicals: work in a well ventilated area, and
work with approved safety equipment, such as respirators that are specially designed
to filter out microscopic particles. (California Health & Safety Code § 25249.5, et seq. )
Note: Performance of this tool (if powered by line voltage) may vary depending on variations
in local line voltage. Extension cord usage may also affect tool performance.
Warning:The warnings, cautions, and instructions discussed in this instruction manual
cannot cover all possible conditions and situations that may occur. It must be under-
stood by the operator that common sense and caution are factors which cannot be
built into this product, but must be supplied by the operator.
Additional Paint Gun Warnings
1. Although this paint gun is airless, it still puts out paint at a very high pressure. Through
improper use, paint can be injected through a persons skin, leading to serious injury,
possibly amputation. If paint is accidentally injected into someone’s skin, contact a
doctor immediately.
2. Never point your sprayer at anyone, including yourself. Gloves and clothing don’t offer
adequate protection from toxic paints, sealers, water-proofers, or stains.
3. Keep the trigger and the electrical cord plug clean and paint-free.
4. Never run your sprayer empty. Damage to the unit may occur.
5. Do not spray asbestos, metallic paints, glazes, red lead, cement, ground chalk,
abrasive grainy paints containing lime, or bleach through your spray gun. These will
severely damage the spray gun.
6. When storing, always coat the unit with a light household oil.
7. The Sprayer must be plugged into an outlet that is grounded in accordance with all
local codes and ordinances.
8. Use caution while spraying on windy days.
Unpacking
When unpacking, check to make sure the parts listed on page 8 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.
REV 10/04
SKU 47274
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Page 4
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Operation
Regulator Knob
Pump
Locknut
Round
Jet Tip
Trigger
Power Cord
Pump
Housing
Container
1. Before loading the Container (17) with material, check the viscosity of the material.
2. Dip the Viscosity Cup into the material, and time how long it takes for the material to
completely run out of the cup (See FIGURE 1). The longer it takes, the higher the viscosity.
3. In general, most materials work adequately if the viscosity is
FIGURE 1
between 15 and 30 seconds.
4. If the viscosity is too high, you will have to thin the material to
use it. Follow the material manufacturer’s instructions for
thinning each material.
5. If you thinned materials, retest the viscosity.
Note: When using a material for the first time, it is
recommended that you experiment on newspaper attached
to a vertical surface, testing your spray patterns.
SKU 47274
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Operation (continued)
Warning!! Makes sure the Spray Gun is unplugged from the power source and your finger is
off of the Trigger (#19) when adjusting or changing Nozzle Tips (#11).
6. Attach the appropriate NozzleTip (11).The Spray Gun comes with:
(2) @ .032” - For latex stain and oil based paints, heavy bodies
(1) @ .021” - For light bodies, stains, sealers, and water-proofers
(1) @ .021” - (Extended Tip) For lighter bodies, stains, sealers, and water-proofers
7. To attach a new Nozzle Tip (11), remove the Locknut (12) and pull
FIGURE 2
out the existing NozzleTip (11). Replace with the appropriate tip
and reinsert the Locknut (12).
Note: When inserting a Nozzle Tip (11), if you turn it in a
clockwise position, the spray pattern will be wide
with fine atomization. If you turn it in a
counterclockwise direction, the pattern will narrow
and result in less atomization.
Note: With thin sealers or stains, fogging or dripping may
occur when the tip is adjusted clockwise. To prevent fogging or dripping, slightly rotate
the nozzle counterclockwise. Small adjustments make a huge difference in spray patterns.
Note: Adjusting the nozzle combined with the Regulator (25) knob, will give you the proper
pattern for all of your applications.
8. Unscrew the Container (17) counterclockwise to remove.
9. Pour the appropriate material (33 ounce maximum) in.
10. Make sure the SuctionTube (16) with the Filter (28) on the end of the tube, is firmly
inserted all the way into the Lid / Pump Housing (18) before installing the Container
(17).
11. Screw the Container (17) on clockwise.
12. Rotating the Regulator (25) knob clockwise reduces the output. Rotating the Regulator
(25) knob counterclockwise increases the output. Rotate the knob to its maximum setting
Proper Spraying Technique
(counterclockwise) to start spraying. Test on a piece of scrap, or newspaper taped to the
wall. Adjust the Regulator (25) knob as needed. If you do not achieve desired results,
For best results, keep the sprayer parallel to the painting surface as shown in FIGURE 3.
you may have to return to step 7 and the notes above to readjust the NozzleTip (11).
Un-parallel spraying, as in FIGURE 4, will result in uneven paint application.
Note: Never tilt the Spray Gun more than 45 degrees for spraying ceilings or floors. Use the
Angled Nozzle Adapter provided with this set.
FIGURE 4
FIGURE 3
Note: It takes a period of
time for the Spray Gun to
accumulate suction pressure;
allow the unit time for the
suction pressure to build up
before expecting optimum
Spray Gun performance.
REV 10/02
Page 6
SKU 47274
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Operation (continued)
Proper Spraying Techniques (continued).
FIGURE 5
From a distance of 12 inches, keep your arm extended
with your elbow locked. This will insure you maintain
the correct distance more accurately. Squeeze
the Trigger (#19) and move the Spray Gun
evenly and steadily. Use an established pattern
for each pass as shown in FIGURE 5. Breaking
up your pass will result in irregular surface
patterns. At the end of each pass, release
the Trigger (#19) for a second to prepare for
the next pass.
Tips
1. Apply a thin coat on each pass so that the paint doesn’t
run. Add additional coats if needed.
2. Always test the sprayer on scrap before using, or if you
let it sit a while between coats.
3. When working on vertical surfaces, first apply a fine mist from a greater distance, and then
move closer to finish.
4. Make sure you mask any area not to be sprayed.
5. Note: Before each use, make sure the SuctionTube (#16) is firmly inserted all the way
into the Lid/Pump Housing (#18) before installing the Container (#17).
Maintenance/Cleaning
Warning!! Before performing any maintenance, the Spray Gun should be unplugged and
you should be wearing your ANSI approved respirator and safety goggles or full face shield.
1. Clean your sprayer immediately after each use.
2. Pour the remaining material from the Container (#17) back into the material can.
3. Use an approved thinner or cleaner for the material used. Read and follow all of the
material manufacturer’s instructions regarding cleaners or thinners.
4. Pour a few ounces of the recommended thinner or cleaner into the Container (#17) and
close it tight. Plug in the sprayer. In a bucket, run the sprayer until the solution comes out
clean. Repeat the process if necessary. Unplug the unit. Contact your local hazardous
waste authority to find the proper outlet to dispose of your thinners, cleaners or paint.
5. Remove the Container (#17). Pull out the Suction Tube (#16). Lubricate the
Suction Tube (#16) hole with a light household oil. Clean the Suction Tube (#16) with a
brush, rinse out the Filter (#28) with hot soapy water or thinner.
6. Reassemble the unit.
Warning!! Never completely submerge your unit in water or any liquid.
7. Note: Replacement cylinders are available in a 4 pack from Harbor Freight
Tools - SKU #47366.
REV 10/02
SKU 47274
For technical questions, please call 1-800-444-3353.
Page 7
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Parts List
Parts No.
1
2
Description
Power Cord
Grommet
3
4
Terminal Board
Switch
5
6
7
Housing Half Shells
Leaf Spring
Armature
8
9
Shock Absorber
Drive Housing
Valve
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Nozzle Set*
Locknut
Cylinder
Piston Spring
Piston
Suction Tube
Container
Lid / Pump Housing
Trigger
Switch Spring
Brand Plate
Housing Half Shells
Screw
Note: Replacement
Cylinders (#13) are
available in a 4 pack
SKU #47366.
Spring
Regulator
Strain Relief
Screw
Filter
Nozzle Extension and Atomizer
* Nozzle Set (#11) includes 2 - .032”, 1 - .021”, 1 - Extended Tip - .021”, / Angled Nozzle
Adapter (not shown on Assembly Drawing).
PLEASE READTHE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDEDTHE PARTS DIAGRAM INTHIS
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBU-
TOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KINDTOTHE BUYERTHAT HE
OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS
QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER
AND/OR DISTRIBUTOR EXPRESSLY STATESTHAT ALL REPAIRS AND PARTS REPLACEMENTS
SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NOT BY THE
BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER
REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING
OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
NOTE: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
SKU 47274
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Assembly Drawing
Nozzle Set (#11) includes 2 - .032”, 1 - .021”, 1 - Extended Tip - .021”, / Angled Nozzle
Adapter (not shown on Assembly Drawing).
SKU 47274
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