Harbor Freight Tools Paint Sprayer 66222 User Manual

HVLP GraVity Feed  
SPray Gun  
66222  
Set uP and OPeratinG inStructiOnS  
®
distributed exclusively by Harbor Freight tools .  
3491 Mission Oaks Blvd., Camarillo, CA 93011  
Visit our website at: http://www.harborfreight.com  
read this material before using this product.  
Failure to do so can result in serious injury.  
SaVe tHiS manuaL.  
©
®
Copyright 2008 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. Diagrams within this manual may not be drawn proportionally. Due to continuing  
improvements, actual product may differ slightly from the product described herein. Tools required for  
assembly and service may not be included.  
For technical questions or replacement parts, please call 1-800-444-3353.  
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b. remove or cover objects from the  
area that you want to protect from  
overspray or paint dust.  
trigger or connect the tool to the air  
supply with the trigger on.  
d. do not overreach. keep proper  
footing and balance at all times.  
Proper footing and balance enables  
better control of the tool in unexpect-  
ed situations.  
c. Operate only in a well-ventilated  
area. Paint thinners and solvents  
may be harmful if breathed. Always  
wear an ANSI approved ventilator  
when painting.  
e.  
use safety equipment. A  
dust mask, non-skid safety  
shoes and a hard hat must  
be used for the applicable  
conditions. Wear protec-  
d. do not operate the tool in explo-  
sive atmospheres, such as in the  
presence of flammable liquids,  
gases, or dust. The tool is able to  
create sparks resulting in the ignition  
of the dust or fumes.  
tive work gloves during use.  
e. Keep bystanders, children, and  
visitors away while operating the  
tool. Distractions are able to result in  
the loss of control of the tool.  
f.  
always wear eye protec-  
tion. Wear ANSI-ap-  
proved safety goggles.  
g.  
always wear hearing  
protection when using  
the tool. Prolonged expo-  
sure to high intensity noise  
is able to cause hearing  
Personal safety  
a. Stay alert. Watch what you are do-  
ing and use common sense when  
operating the tool. Do not use the  
tool while tired or under the influ-  
ence of drugs, alcohol, or medica-  
tion. A moment of inattention while  
operating the tool increases the risk  
of injury to persons.  
loss.  
tool use and care  
a. use clamps or another practical  
way to secure and support the  
work piece to a stable platform.  
Holding the work by hand or against  
the body is unstable and is able to  
lead to loss of control.  
b. dress properly. do not wear loose  
clothing or jewelry. contain long  
hair. keep hair, clothing, and  
gloves away from moving parts.  
Loose clothes, jewelry, or long hair  
increases the risk of injury to persons  
as a result of being caught in moving  
parts.  
b. do not force the tool. Use the  
correct tool for the application. The  
correct tool will do the job better and  
safer at the rate for which the tool is  
designed.  
c. avoid unintentional starting. Be  
sure the trigger is off before con-  
necting to the air supply. Do not  
carry the tool with your finger on the  
c. do not use the tool if the trigger  
does not turn the tool on or off.  
Any tool that cannot be controlled  
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with the trigger is dangerous and  
must be repaired.  
b. When servicing a tool, use only  
identical replacement parts. use  
only authorized parts.  
d. disconnect the tool from the air  
source before making any adjust-  
ments, changing accessories, or  
storing the tool. Such preventive  
safety measures reduce the risk of  
starting the tool unintentionally. Turn  
off and detach the air supply, safely  
discharge any residual air pressure,  
and release the throttle and/or turn  
the trigger to its off position before  
leaving the work area.  
c. use only the lubricants supplied  
with the tool or specified by the  
manufacturer.  
air source  
a.  
never connect to an air  
source that is capable of  
exceeding 100 psi. Over  
pressurizing the tool may  
cause bursting, abnormal  
e. Store the tool when it is idle out of  
reach of children and other un-  
trained persons. A tool is dangerous  
in the hands of untrained users.  
operation, breakage of the tool or  
serious injury to persons. Use only  
clean, dry, regulated compressed air  
at the rated pressure or within the  
rated pressure range as marked on  
the tool. Always verify prior to using  
the tool that the air source has been  
adjusted to the rated air pressure or  
within the rated air-pressure range.  
f.  
maintain the tool with care. Keep a  
cutting tool sharp and clean. A prop-  
erly maintained tool, with sharp cut-  
ting edges reduces the risk of binding  
and is easier to control.  
b. Never use oxygen, carbon dioxide,  
combustible gases or any bottled  
gas as an air source for the tool.  
Such gases are capable of explosion  
and serious injury to persons.  
g. check for misalignment or bind-  
ing of moving parts, breakage of  
parts, and any other condition that  
affects the tool’s operation. If dam-  
aged, have the tool serviced before  
using. Many accidents are caused  
by poorly maintained tools. There is a  
risk of bursting if the tool is damaged.  
SaVe tHeSe  
inStructiOnS.  
h. use only accessories that are  
identified by the manufacturer for  
the specific tool model. Use of an  
accessory not intended for use with  
the specific tool model, increases the  
risk of injury to persons.  
Service  
a. tool service must be performed  
only by qualified repair personnel.  
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cannot be built into this product, but  
must be supplied by the operator.  
SymBOLS and  
SPeciFic SaFety  
inStructiOnS  
2. WARNING: The brass components  
of this product contain lead, a chemi-  
cal known to the State of California  
to cause birth defects (or other repro-  
ductive harm). (California Health &  
Safety code § 25249.5, et seq.)  
Symbol Definitions  
Symbol  
Property or statement  
No-load speed  
n
o
3. Only use with accessories rated to  
handle the forces exerted by this tool  
during operation.  
Revolutions or reciprocation per  
minute  
.../min  
PSi  
Pounds per square inch of pressure  
Foot-pounds of torque  
4. Attach all accessories properly to the  
tool before connecting the air sup-  
ply. A loose accessory may detach or  
break during operation.  
ft-lb  
Blows per minute  
BPm  
cFm  
ScFm  
nPt  
5. Obey the manual for the air compres-  
sor used to power this tool.  
Cubic Feet per Minute flow  
Cubic Feet per Minute flow at  
standard conditions  
6. Install an in-line shutoff valve to allow  
immediate control over the air supply  
in an emergency, even if a hose is  
ruptured.  
National pipe thread, tapered  
National pipe thread, straight  
nPS  
WARNING marking concerning Risk  
of Eye Injury. Wear ANSI-approved  
eye protection.  
SaVe tHeSe  
inStructiOnS.  
WARNING marking concerning Risk  
of Hearing Loss. Wear hearing  
protection.  
WARNING marking concerning Risk  
of Respiratory Injury. Wear NIOSH-  
approved dust mask/respirator.  
WARNING marking concerning Risk  
of Explosion.  
Specific Safety Instructions  
1. The warnings and precautions dis-  
cussed in this 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  
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subheadings therein before set  
up or use of this product.  
FunctiOnaL deScriPtiOn  
Specifications  
note: For additional information regarding  
the parts listed in the following pages,  
refer to the Assembly Diagram near  
the end of this manual.  
Air Pressure Range  
15-45 PSI  
Maximum Air Pressure 45 PSI  
Air Inlet  
1/4” -18 NPS  
Air Consumption  
Paint Cup Capacity  
12 SCFM @ 45 PSI  
20 FL. OZ.  
unpacking  
When unpacking, check to make sure  
that the item is intact and undamaged. If  
any parts are missing or broken, please  
call Harbor Freight Tools at the number  
shown throughout the manual as soon as  
possible.  
components and controls  
Please refer to the photo on this page for  
important components and controls.  
This air tool may be shipped with a  
protective plug covering the air inlet.  
Remove this plug before set up.  
initiaL tOOL Set uP/  
aSSemBLy  
read the entire imPOrtant  
SaFety inFOrmatiOn  
section at the beginning of this  
manual including all text under  
Lid (29)  
Cup (28)  
Fluid Control  
Knob (12)  
Air Cap (1)  
Trigger (36)  
Gun Body (8)  
Air Regulator (37)  
Spray Regulator (20)  
Air Pressure  
Gauge (38)  
Air Adjustment Valve (31)  
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do not install a female quick  
coupler on the tool. Such a coupler  
contains an air valve that will allow  
the air tool to retain pressure and  
operate accidentally after the air  
supply is disconnected.  
air Supply  
tO PreVent  
exPLOSiOn:  
use only clean,  
dry, regulated, compressed air  
to power this tool. do not use  
oxygen, carbon dioxide,  
combustible gases, or any  
other bottled gas as a power  
source for this tool.  
note: Air flow, and therefore tool perfor-  
mance, can be hindered by under-  
sized air supply components.  
3. The air hose must be long enough  
to reach the work area with enough  
extra length to allow free movement  
while working.  
4. Make sure the tool’s trigger is in the  
off position; refer to Operation section  
for description of controls.  
5. Close the in-line safety valve be-  
tween the compressor and the tool.  
6. Turn on the air compressor according  
to the manufacturer’s directions and  
allow it to build up pressure until it  
cycles off.  
7. Adjust the air compressor’s output  
regulator so that the air output is  
enough to properly power the tool,  
but the output will not exceed the  
tool’s maximum air pressure at any  
time. Adjust the pressure gradually,  
while checking the air output gauge  
to set the right pressure range.  
1. Incorporate a shut-off valve, regula-  
tor with pressure gauge, and filter  
for best service, as shown in the  
diagram above. an in-line shutoff  
valve is an important safety device  
because it controls the air supply  
even if the air hose is ruptured.  
8. Inspect the air connections for leaks.  
Repair any leaks found.  
2. Attach an air hose to the compres-  
sor’s air outlet. Connect the air hose  
to the air inlet of the tool. Other com-  
ponents, such as a connector and  
quick coupler, will make operation  
more efficient, but are not required.  
9. If the tool will not be used at this  
time, turn off and detach the air sup-  
ply, safely discharge any residual air  
pressure, and release the throttle  
and/or turn the trigger to its off posi-  
tion to prevent accidental operation.  
WarninG! tO PreVent SeriOuS  
injury FrOm accidentaL  
OPeratiOn:  
SKU 66222  
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note: Residual air pressure should not be 4. Air powered HVLP and conventional  
present after the tool is disconnected  
from the air supply. However, it is a  
good safety measure to attempt to  
discharge the tool in a safe fashion  
after disconnecting to ensure that the  
tool is disconnected and unpowered.  
spray guns differ from airless spray-  
ers that are fluid powered.  
5. Airless sprayers use a fluid pump to  
force the paint through the gun to the  
spray cap. The fluid pressure at the  
cap atomizes the paint causing the  
spray.  
OPeratinG inStructiOnS  
6. Airless sprayers do not require an air  
compressor to operate as do HVLP  
and conventional sprayers. However,  
since the paint is pumped under pres-  
sure through the gun, airless spray-  
ers are more difficult to clean and  
maintain than HVLP sprayers.  
read the entire imPOrtant  
SaFety inFOrmatiOn  
section at the beginning of this  
manual including all text under  
subheadings therein before set  
up or use of this product.  
inspect tool before use, looking  
for damaged, loose, and  
missing parts. if any problems  
are found, do not use tool until  
repaired.  
7. If you have compressed air available,  
HVLP spray guns will provide a better  
finish with less paint waste and less  
required maintenance that conven-  
tional or airless sprayers.  
understanding HVLP  
1. HVLP Spray Guns are different from  
conventional spray guns and airless  
sprayers.  
2. HVLP stands for High Volume Low  
Pressure. This means that HVLP  
guns will spray a larger amount of  
paint at lower Cap Pressure than  
conventional air powered spray guns.  
3. Cap Pressure is the amount of air  
pressure present at the Spray Cap  
(1). Lower pressure results in less  
paint being air dried between the  
gun and the work surface, and less  
bounce back from the work surface.  
You will achieve a smoother painted  
surface with less waste and over-  
spray than with a conventional air  
powered spray gun.  
Paint bounce back  
comparison.  
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2. Route the air hose along a safe route  
to reach the work area without creat-  
ing a tripping hazard or exposing the  
air hose to possible damage. The air  
hose must be long enough to reach  
the work area with enough extra  
length to allow free movement while  
working.  
tool Set up  
tO PreVent  
SeriOuS injury  
FrOm  
accidentaL OPeratiOn:  
turn off the tool, detach the  
air supply, safely discharge  
any residual air pressure in  
the tool, and release the  
throttle and/or turn the trigger  
to its off position before  
performing any inspection,  
maintenance, or cleaning  
procedures.  
3. Secure loose work pieces using a  
vise or clamps (not included) to pre-  
vent movement while working.  
4. There must not be hazardous ob-  
jects (such as utility lines or foreign  
objects) nearby that will present a  
hazard while working.  
tO PreVent SeriOuS  
injury:  
5. Prepare a well ventilated work space.  
Use a ventilator designed to prevent  
inhalation of paint and volatile fluids  
and gasses.  
do not adjust or tamper with  
any control or component in a  
way not specifically explained  
within this manual. improper  
adjustment can result in  
tool failure or other serious  
hazards.  
Prepare the paint  
1. Due to the high viscosity of latex and  
most water based paints, they are not  
generally recommended for HVLP  
painting. Check with the paint manu-  
facturer for specifics.  
1. This tool is treated with anti-corrosive  
compounds at the factory. Flush it out  
thoroughly with paint thinner before  
first use.  
2. In most cases, the paint must be  
thinned for spraying. Only use the  
thinner recommended by the paint  
manufacturer. If the paint is too thick,  
you will get a thick, orange-peel fin-  
ish, and the sprayer may clog. If the  
paint is too thin, you will get poor cov-  
erage, drips and runs, and excessive  
drying of the paint in the air.  
2. Before using check all fasteners and  
air connections to be sure they are  
tight.  
3. To avoid contamination, blow out  
the air line before connecting to the  
Spray Gun.  
Work Piece and  
Work area Set up  
3. Proper thinning varies with the mate-  
rial being used and local temperature  
and humidity. In most cases, thinning  
will be approximately 10% and not  
more than 30%.  
1. Designate a work area that is clean  
and well-lit. The work area must not  
allow access by children or pets to  
prevent injury and distraction.  
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4. Test the paint viscosity by dipping  
a stick into the paint, then observ-  
ing the rate paint drips from the end.  
Properly thinned paint will drip about  
1 per second.  
squeeze the Trigger (36) all the way.  
With the Trigger squeezed, turn the  
Fluid Control Knob (12) counterclock-  
wise to increase paint flow.  
3. When the paint pattern is smooth,  
lock the setting by turning the Lock-  
nut (11) clockwise.  
5. Follow paint manufacturer’s recom-  
mendations. Experiment with scrap  
material to determine the correct  
paint viscosity.  
adjusting the  
Fan direction and Pattern  
6. Always strain the paint when pouring  
it into the Cup (28). This will prevent  
lumps or impurities from clogging the  
Fluid Nozzle (2).  
1. The fan shaped spray direction of the  
paint can be adjusted by turning the  
Air Cap (1). Loosen the lock ring, turn  
the Air Cap as needed then retighten  
the lock ring.  
adjust the air Pressure  
1. Adjust the air pressure by turning the  
Knob on the Air Regulator (37). Pull  
the Knob out to release, turn to ad-  
just, then press back in to lock. The  
air pressure setting can be read on  
the Air Pressure Gauge (38). The rec-  
ommended pressure is 15 to 45 PSI.  
cautiOn! tO PreVent tOOL  
and acceSSOry FaiLure, re-  
SuLtinG in injury:  
do not exceed the tool’s maximum  
air pressure rating.  
2. When spraying in a horizontal motion,  
have the Air Cap (1) turned horizontally  
to have a vertical fan. When spraying  
up and down, have the Air Cap turned  
vertically to have a horizontal fan.  
2. Air pressure can be fine adjusted us-  
ing the Air Adjustment Valve (31). Air  
pressure too high will cause splatter-  
ing, too low will cause drizzling.  
3. The spray pattern can be adjusted  
by turning the Spray Regulator (20).  
Turning the knob counterclockwise  
will open and flatten the pattern.  
Turning it clockwise will close the pat-  
tern making it more round.  
adjust the Paint Volume  
1. The amount of paint being sprayed  
can be adjusted with the Fluid Con-  
trol Knob (12). To adjust, release the  
Lock Nut (11) by turning it slightly  
counterclockwise.  
2. Turn the Fluid Control Knob (12)  
all the way clockwise to turn off  
paint flow. Using a scrap material,  
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4. Practice on scrap material until the  
desired pattern is achieved.  
a paint film. The paint film chemically  
bonds together.  
6. While the paint is wet, before it has  
dried, you can thin or clean away the  
paint using a thinner.  
understanding  
Paint thinners and Solvents  
1. Understand the difference between a  
paint “thinner” and a paint “solvent”. A  
thinner is used to thin the paint while  
it is wet. A solvent is used to dissolve  
the paint after it has dried.  
7. Once the paint has dried, in most  
cases the thinner can no longer be  
used. You must then use a solvent to  
remove the paint.  
8. Cleaning the paint before it dries,  
using a thinner, is much easier than  
cleaning the paint after it dries using  
a solvent.  
Paint type thinner  
Solvent  
Latex  
Water  
Water  
Paint Remover  
Paint Remover  
Water  
Based  
Paint  
9. Always clean this spray gun immedi-  
ately after use, before the paint dries.  
Use the thinner approved by the  
manufacturer for your paint.  
Oil Varnish Mineral  
Paint Remover  
or Paint  
Lacquer  
Shellac  
Spirits,  
Turpentine  
Lacquer  
Thinner  
Lacquer Thin-  
ner  
Painting technique  
with this HPLV Sprayer  
Alcohol  
Alcohol  
1. Your goal in painting with this sprayer  
is to get good coverage of the work  
piece. You want an even coat with-  
out drips or runs and with a smooth  
surface.  
2. There are basically three types of  
paint: evaporative, chemical and  
coagulating.  
3. Evaporative paints cure when the  
solvent evaporates. These are quick  
drying paints, including lacquer and  
shellac.  
2. To get an even coat, hold the spray  
gun 6 to 8 inches away from the work  
surface. Keep the distance of your  
gun from the project, as consistent as  
possible.  
4. Chemical paints cure when there is  
a chemical reaction solidifying the  
paint, as the solvent evaporates. Oil-  
based paint and varnish are of this  
type. They are relatively slow drying,  
and may cure over months or years.  
3. Start spraying slightly off the edge  
of the work piece, move the spray  
across and end slightly off the work  
piece. Overlap each pass across the  
work piece. While this method does  
create over-spray at the edges, it will  
give you an even coat without heavier  
or lighter layers at the edge.  
5. Coagulating paint such as latex and  
water based finishes are composed  
of bits of paint suspended in water.  
As the water evaporates the bits of  
paint adhere to each other and form  
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4. Do not stop your motion when spray-  
ing the work piece. Stopping will  
a strainer. Replace the Lid (29) and  
screw on tightly.  
cause to build up, and run or sag.  
5. Put on a ventilator and other safety  
equipment recommended in the  
Safety Section of this manual.  
5. Hold the Spray Gun vertically. Hold-  
ing the gun at an angle will affect the  
spray pattern.  
6. Point the Sprayer toward the work  
material and squeeze the Trigger  
(36). Paint will spray.  
7. Move the spray across the work  
piece as needed.  
8. When done painting, release the Trig-  
ger (36). The gun will stop spraying.  
9. The Gun Body (8) has a hook built  
into the top for convent hanging dur-  
ing pauses in operation.  
6. Do not spray too heavily. Heavy spray  
will cause drips, sags and runs. Build  
up the paint surface with several light  
coats. Apply each coat when the  
previous one is tacky but not yet dry.  
This will allow the over coat to adhere  
to the previous layer, but will not be  
so heavy as to cause sags, runs or  
drips.  
10. When done painting, pour remaining  
paint from the Cup (28) into an appro-  
priate container.  
11. clean the Sprayer thoroughly be-  
fore putting it away.  
12. To prevent accidents, turn off the  
tool, detach the air supply, safely  
discharge any residual air pressure  
in the tool, and release the throttle  
and/or turn the trigger to its off posi-  
tion after use.  
7. You must also avoid thick, clumpy  
paint surface called “orange peel”.  
Prevent orange peel by thinning the  
paint properly before spraying. Then  
spray successive light, even coats.  
13. Then store the tool indoors in a safe  
place out of children’s reach.  
Operating the HVLP Sprayer  
1. Cover all items you do not want  
painted, using painters plastic or a  
drop cloth (not included).  
2. Connect your air supply hose to the  
Air Inlet (32).  
3. Adjust the Air Regulator to 15-45 PSI.  
4. Fill the Cup (28) with thinned paint.  
Remember to pour the paint through  
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cleaning the Sprayer  
uSer maintenance  
inStructiOnS  
1. IMPORTANT: The Spray Gun must  
be cleaned every time immediately  
after use. Improper cleaning is the  
primary cause of Spray Gun failure.  
Procedures not specifically  
explained in this manual  
must be performed only by a  
qualified technician.  
2. Immediately after finishing painting,  
pour out remaining paint from the  
Cup. Rinse out the cup with paint  
thinner. Wipe out the cup to clean  
remaining paint residue. Fill the Cup  
part way with paint thinner and spray  
into a suitable container. Continue  
to spray until the thinner comes out  
clear.  
tO PreVent  
SeriOuS injury  
FrOm  
accidentaL OPeratiOn:  
turn off the tool, detach the  
air supply, safely discharge  
any residual air pressure in  
the tool, and release the  
throttle and/or turn the trigger  
to its off position before  
performing any inspection,  
maintenance, or cleaning  
procedures.  
3. Dump remaining thinner from the Cup  
back into the thinner container. Wipe  
off the exterior of the Spray Gun with  
thinner to remove paint.  
4. If the gun becomes clogged, disassemble  
parts 1 - 7, 9 -12 and 26 - 30 and carefully  
clean all the parts.  
tO PreVent SeriOuS  
injury FrOm tOOL  
FaiLure:  
5. To clean, use the enclosed brush (33)  
or a cleaning kit, such as SKU# 99634  
available from Harbor Freight Tools.  
do not use damaged  
equipment. if abnormal  
noise, vibration, or leaking  
air occurs, have the problem  
corrected before further use.  
6. Never use a pin or metal scraper to  
clean the delicate components of this  
sprayer. You will damage the sprayer.  
7. Carefully reassemble following the  
Assembly diagram on page 17. Be  
sure all springs and seals are prop-  
erly seated. Do not damage threads.  
Do not overtighten.  
cleaning, maintenance,  
and Lubrication  
note: These procedures are in addition to  
the regular checks and maintenance  
explained as part of the regular op-  
eration of the air-operated tool.  
SKU 66222  
For technical questions, please call 1-800-444-3353.  
Page 13  
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tool troubleshooting  
Problem  
Possible causes  
Likely Solutions  
Decreased output. 1. Not enough air pressure  
1. Check for loose connections and make sure  
that air supply is providing enough air flow  
(CFM) at required pressure (PSI) to the  
tool’s air inlet. Do not exceed maximum air  
pressure.  
and/or air flow.  
2. Obstructed trigger.  
2. Clean around trigger to ensure free  
movement.  
3. Blocked air inlet screen (if  
equipped).  
3. Clean air inlet screen of buildup.  
4. Air leaking from loose  
housing.  
4. Make sure housing is properly assembled and  
tight.  
5. Air Regulator set too low.  
5. Adjust Air Regulator setting.  
Severe air  
leakage.  
(Slight air leakage  
is normal,  
especially on older  
tools.)  
1. Cross-threaded housing  
components.  
1. Check for incorrect alignment and uneven  
gaps. If cross-threaded, disassemble and  
replace damaged parts before use.  
2. Loose housing.  
2. Tighten housing assembly. If housing cannot  
tighten properly, internal parts may be  
misaligned.  
3. Damaged connectors or  
housing.  
3. Replace damaged components.  
Inconsistent paint 1. Clogged Air Cap (1) or  
1. Clean , adjust or replace Air Cap or Fluid  
flow, blobs and  
damaged Fluid Nozzle (2).  
Nozzle.  
splatters  
2. Clogged Paint Filter (27).  
2. Clean Paint Filter (27).  
3. Damaged or dirty Paint  
Needle (9).  
3. Clean, repair or replace Paint Needle (9).  
4. Contaminated paint.  
4. Remove paint and filter it.  
Paint blows out  
too hard  
1. Air pressure set too high.  
1. Adjust Air Regulator to no more than 45 PSI.  
Fine tune air pressure using Air Adjustment  
Valve (31).  
Follow all safety precautions whenever diagnosing or servicing the tool.  
disconnect air supply before service.  
SKU 66222  
For technical questions, please call 1-800-444-3353.  
Page 14  
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Paint aPPLicatiOn trOuBLeSHOOtinG  
Problem  
Possible causes  
Likely Solutions  
Paint surface is bumpy or  
“orange peeled”  
1. Paint is applied too thick  
1. Paint must be thinned properly  
before spraying  
2. Incorrect paint volume  
2. Adjust Fluid Control Knob (12)  
3. Insufficient air pressure  
3. Adjust Air Regulator (37) and Air  
Adjustment Valve (31)  
4. Paint gun too far from paint  
surface during spraying  
4. Hold spray gun closer to surface  
during spraying.  
Paint sags or runs  
1. Excess thinning of paint  
2. Paint applied too thick  
1. Recheck paint viscosity. Add  
unmixed paint to thicken mixture.  
2. Apply thinner coats, allowing paint  
to get tacky between coats.  
3. Paint gun too close to work  
surface  
3. Move spray gun further back from  
paint surface when applying paint.  
4. Uneven or hesitant motion of  
spray gun  
4. Keep spray gun moving during  
painting. Hesitations can cause  
sags or runs.  
5. Excess overlapping of each  
spray stroke  
5. Overlap each stroke to keep the  
coverage even, but be aware that  
you are adding coat thickness by  
overlapping.  
6. Excessive paint fluid  
6. Adjust the Fluid Control Knob (12)  
Blotchy surface (blushing) 1. Paint dries too fast  
1. Use less thinner or add a drier.  
or uneven color  
2. Uneven paint application  
2. Start each stroke off the work  
material and overlap each stroke  
consistently.  
3. Work material absorbs paint  
unevenly  
3. Use a conditioner or sealer coat  
before applying the finish coat.  
Spots on surface  
with light center (fish eyes)  
1. Paint mixture too thin  
1. Add undiluted paint to thicken  
mixture  
2. Improper primer or  
incompatible surface  
2. Check manufacturer’s  
recommendations for primer or  
compatible surfaces  
3. Surface contamination  
3. Clean surface thoroughly with  
thinner before applying paint  
Spots on surface with dark 1. Dust or dirt on surface  
center (contamination)  
1. Clean surface with compressed air  
or tack cloth before painting  
2. Insufficiently sanded  
2. Sand wood to a sufficiently fine grit  
before painting.  
3. Raised grain  
3. Wipe wood surface with thinner to  
raise grain, then sand with fine grit  
to knock of “hairs”  
SKU 66222  
For technical questions, please call 1-800-444-3353.  
Page 15  
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PartS LiSt  
description  
Air Cap with Lock ring  
Fluid Nozzle  
Air Ring  
Part  
1
Q’ty  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
PLeaSe read tHe FOLLOWinG  
careFuLLy  
4
Piston Pad  
5
Compression Ring  
Needle Seal Spring  
Air Piston Seal  
Gun Body  
THE MANUFACTURER AND/OR DISTRIBUTOR  
HAS PROVIDED THE PARTS LIST AND  
6
7
ASSEMBLY DIAGRAM IN THIS MANUAL AS  
A REFERENCE TOOL ONLY. NEITHER THE  
MANUFACTURER OR DISTRIBUTOR MAKES  
ANY REPRESENTATION OR WARRANTY OF  
ANY KIND TO THE BUYER THAT 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 STATES THAT  
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.  
8
9
Paint Needle  
Paint Piston Spring  
Lock Nut  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
Fluid Control Knob  
Air Piston Box  
Air Piston Packing  
Air Piston  
Piston Ring  
Air Piston  
Air Piston Spring  
Spray Regulator Screw  
Spray Regulator Knob  
Screw  
Trigger Bolt  
Locking Plate  
Bolt  
Bolt  
Paint Connector  
Filter  
Cup  
Lid  
Vent  
Air Adjustment Valve Assembly  
Air Inlet  
Brush  
Hex Adapter  
Wrench  
Trigger  
Air Regulator  
Air Pressure Gauge  
SKU 66222  
For technical questions, please call 1-800-444-3353.  
Page 16  
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aSSemBLy diaGram  
SKU 66222  
For technical questions, please call 1-800-444-3353.  
Page 17  
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Limited 90 day 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 prod-  
uct is free from defects in materials and workmanship for the period of 90 days 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,  
criminal activity, improper installation, normal wear and tear, or to lack of maintenance.  
We shall in no event be liable for death, injuries to persons or property, or for incidental,  
contingent, special or consequential damages arising from the use of our product. Some  
states do not allow the exclusion or limitation of incidental or consequential damages, so  
the above limitation of exclusion may not apply to you. THIS WARRANTY IS ExPRESS-  
LY IN LIEU OF ALL OTHER WARRANTIES, ExPRESS OR IMPLIED, INCLUDING THE  
WARRANTIES OF MERCHANTABILITY AND FITNESS.  
To take advantage of this warranty, the product or part must be returned to us with  
transportation charges prepaid. Proof of purchase date and an explanation of the com-  
plaint must accompany the merchandise. If our inspection verifies the defect, we will ei-  
ther repair or replace the product at our election or we may elect to refund the purchase  
price if we cannot readily and quickly provide you with a replacement. We will return re-  
paired products at our expense, but if we determine there is no defect, or that the defect  
resulted from causes not within the scope of our warranty, then you must bear the cost  
of returning the product.  
This warranty gives you specific legal rights and you may also have other rights  
which vary from state to state.  
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353  
record Product’s Serial number Here:  
note: If product has no serial number, record month and year of purchase instead.  
note: Some parts are listed and shown for illustration purposes only, and are not avail-  
able individually as replacement parts.  
SKU 66222  
For technical questions, please call 1-800-444-3353.  
Page 18  
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