Central Pneumatic 66801 Installation manual

INDUSTRIAL HVLP
PAINT SPRAY SYSTEM
WITH DIGITAL GAUGE
66801
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©2009 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.

IMPORTANT: Clean the Spray Gun IMMEDIATELY after use.
Improper cleaning will cause the Spray Gun not to work.
SKU 66801 Page 2
For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
CONTENTS
SAFETY ALERT SYMBOL AND
SIGNAL WORDS .............................3
IMPORTANT SAFETY
INSTRUCTIONS .......................... 3
GENERAL...........................................3
WORK AREA......................................3
PERSONAL SAFETY ......................... 4
TOOL USE AND CARE ......................4
SERVICE ............................................5
AIR SOURCE......................................5
SYMBOLS AND SPECIFIC
SAFETY INSTRUCTIONS ........... 6
SYMBOL DEFINITIONS ..................... 6
FUNCTIONAL DESCRIPTION....... 8
SPECIFICATIONS ..............................8
COMPONENTS AND CONTROLS ....8
INITIAL TOOL SET UP/
ASSEMBLY.................................. 8
UNPACKING.......................................9
AIR SUPPLY.......................................9
OPERATING INSTRUCTIONS .... 10
TOOL SET UP ..................................10
WORK PIECE AND WORK AREA
SET UP .......................................... 11
GENERAL OPERATING
INSTRUCTIONS ............................12
USER-MAINTENANCE
INSTRUCTIONS ........................ 14
CLEANING, MAINTENANCE, AND
LUBRICATION...............................14
TROUBLESHOOTING......................17
TROUBLESHOOTING
(CONTINUED)................................18
PARTS LIST................................. 19
ASSEMBLY DIAGRAM................ 19
LIMITED 90 DAY WARRANTY .... 20

For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
SKU 66801 Page 3
SAVE THIS MANUAL
Keep this manual for the safety warn-
ings and precautions, assembly, operat-
ing, inspection, maintenance and cleaning
procedures. Write the product’s serial
number in the back of the manual near the
assembly diagram (or month and year of
purchase if product has no number). Keep
this manual and the receipt in a safe and
dry place for future reference.
Safety Alert Symbol and Signal
Words
In this manual, on the labeling,
and all other information provid-
ed with this product:
This is the safety alert
symbol. It is used to alert
you to potential personal
injury hazards. Obey all
safety messages that
follow this symbol to avoid
possible injury or death.
DANGER indicates
a hazardous
situation which, if not
avoided, will result in death or
serious injury.
WARNING
indicates a
hazardous situation which, if
not avoided, could result in
death or serious injury.
CAUTION, used
with the safety
alert symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate injury.
NOTICE is used to
address practices
not related to personal injury.
CAUTION, without
the safety alert
symbol, is used to address
practices not related to
personal injury.
IMPORTANT SAFETY
INSTRUCTIONS
INSTRUCTIONS PERTAINING
TO A RISK OF FIRE,
ELECTRIC SHOCK, OR
INJURY TO PERSONS
WARNING – When using tools, basic pre-
cautions should always be followed,
including the following:
General
To reduce the risks of electric shock,

instructions before using the tool.
Work area
Keep the work area clean and wella.
lighted. Cluttered benches and dark
areas increase the risks of electric

Do not operate the tool in explo-b.
sive atmospheres, such as in the
presence of ammable liquids,
gases, or dust. The tool is able to
create sparks resulting in the ignition
of the dust or fumes.
Keep bystanders, children, andc.
visitors away while operating the

For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
SKU 66801 Page 4
tool. Distractions can result in the
loss of control of the tool.
Personal safety
Stay alert. Watch what you are do-a.
ing and use common sense when
operating the tool. Do not use the
tool while tired or under the inu-
ence of drugs, alcohol, or medica-
tion. A moment of inattention while
operating the tool increases the risk

Avoid unintentional starting. Beb.
sure the Trigger is off before con-
necting to the air supply. Do not

Trigger or connect the tool to the air

Trigger.
Remove adjusting keys andc.
wrenches before turning the tool
on. A wrench or a key that is left at-
tached to a rotating part of the tool

Do not overreach. Keep properd.
footing and balance at all times.
Proper footing and balance enables
better control of the tool in unexpect-
ed situations.
e. Use safety equipment. A
respirator, non-skid safety
shoes and a hard hat must
be used for the applicable
conditions. Wear heavy-duty work
gloves during use.
f. Always wear eye protec-
tion. Wear ANSI-ap-
proved safety goggles and
full face shield.
Tool use and care
Use clamps or another practicala.
way to secure and support the
workpiece to a stable platform.
Holding the work by hand or against
the body is unstable and is able to
lead to loss of control.
The unit must be thoroughlyb.
cleaned out after every use. Im-
proper cleaning of the Spray Gun
is a common reason for the Spray
Gun to jam or not perform prop-
erly.
Do not force the tool.c. Use the
correct tool for the application. The

safer at the rate for which the tool is
designed.
Do not use the tool if the Triggerd.
does not turn the tool on or off.
Any tool that cannot be controlled
with the switch is dangerous and
must be repaired.
Disconnect the tool from the aire.
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 switch to its off position before
leaving the work area.
Store the tool when it is idle out off.
reach of children and other un-
trained persons. A tool is dangerous
in the hands of untrained users.
Maintain the tool with care.g. Keep
tools clean for better and safer per-

For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
SKU 66801 Page 5
formance. Follow instructions for
lubricating threaded connections 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.
Disconnect air supply.h. Discon-
nect air hose when not in use, when
changing accessories, and during
maintenance.
Check for misalignment or bind-i.
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.
Use only accessories that are
identied by the manufacturer for
the specic tool model. Use of an
accessory not intended for use with


Service
Tool service must be performeda.
only by qualied repair personnel.
When servicing a tool, use onlyb.
identical replacement parts. Use
only authorized parts.
Use only the lubricants suppliedc.
with the tool or specied by the
manufacturer.
Air source
a. Never connect to an air
source that is capable of
exceeding 200 psi. Over
pressurizing the tool may
cause bursting, abnormal operation,

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

rated air pressure or within the rated
air-pressure range.
Never use oxygen, carbon dioxide,b.
combustible gases or any bottled
gas as an air source for the tool.
Such gases are capable of explosion

Use proper size and type exten-c.
sion cord. If an extension cord is re-
quired 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

compressor. Check your compres-
sor’s manual for the appropriate size
cord.
SAVE THESE
INSTRUCTIONS.

For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
SKU 66801 Page 6
SYMBOLS AND
SPECIFIC SAFETY
INSTRUCTIONS
Symbol Denitions
Symbol Property or statement
PSI Pounds per square inch of pressure
CFM 
SCFM 
standard conditions
NPT National pipe thread, tapered
NPS National pipe thread, straight
WARNING marking concerning Risk

eye protection.
WARNING marking concerning Risk

approved dust mask/respirator.
WARNING marking concerning Risk
of Explosion.
WARNING marking concerning Risk
of Fire.
Specic Safety Instructions
The warnings and precautions dis-1.
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
cannot be built into this product, but
must be supplied by the operator.
2.
lights, stoves, heaters, the air com-
pressor, or any other heat source.
Most solvents and coatings are

sprayed. Maintain a distance of at
least 25 feet from the air compressor.
If possible, locate the air compressor
in a separate room.
Read all of the information concern-3.
ing coating products and cleaning
solvents. Do not use chlorinated
solvents (e.g. 1-1-1 Trichlorethyl-
ene and Methylene Choride, also
know as methyl chloride) to clean
sprayers. Many sprayers contain
aluminum, which reacts strongly
to chlorinated solvents. If you have
any doubt about potential chemical
reactions, contact the solvent or coat-
ing manufacturer.
Materials used when painting or4.
cleaning may be harmful or fatal if
inhaled or swallowed. Only use in an
area with adequate ventilation. Use
a NIOSH-approved respirator when
painting or using cleaning solvents.
Never release sprayer lid while cup is5.
pressurized.
Industrial applications must follow6.
OSHA requirements.
Never point a spray gun at a person7.

Spraying hazardous materials may8.

not spray pesticides, acids, corrosive
materials, fertilizers, and toxic chemi-
cals.
WARNING: Some dust created by9.
power sanding, sawing, grinding, drill-
ing, and other construction activities,
contains chemicals known [to the
State of California] to cause cancer,
birth defects or other reproductive
harm. Some examples of these
chemicals are:

For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
SKU 66801 Page 7


cement or other masonry products
-
cally treated lumber
Your risk from these exposures var-
ies, 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
those dust masks that are specially

particles. (California Health & Safety
Code § 25249.5, et seq.)
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.)
Attach all accessories properly to the10.
tool before connecting the air sup-
ply. A loose accessory may detach or
break during operation.
Obey the manual for the air compres-11.
sor used to power this tool.
Install an in-line shutoff valve to allow12.
immediate control over the air supply
in an emergency, even if a hose is
ruptured.
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.
SAVE THESE
INSTRUCTIONS.

For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
SKU 66801 Page 8
FUNCTIONAL DESCRIPTION
Specications
Operating Air
Pressure Range 20-43 PSI
Air Inlet 1/4” -18 NPS
Air Consumption 15 CFM @ 29 PSI
Nozzle Size 1.3 mm
Paint Cup Capacity 1.25 pints (20.3oz/600ml)

Out
Mounted in Handle
(measures PSI)
Batteries 
Button type
Accessories

brush, 2mm hex wrench, hex

trap element, spare batteries
Components and Controls
Air Cap (1)
Cup Assembly (6)
Pattern Control Knob (23)
Air Control
Knob (19)
Air Inlet (35)
Trigger (36)
Fluid Control
Knob (12)
Figure 1
Digital Display Screen
Red Button
9-Way Flat Wrench
Hex
Adapter
Brush
Filter with
Moisture Trap
2 mm Hex
Wrench
Spare Batteries
Figure 2

INITIAL TOOL SET UP/
ASSEMBLY
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.
Note: For additional information regarding
the parts listed in the following pages,
refer to the Assembly Diagram near
the end of this manual.

For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
SKU 66801 Page 9
Unpacking
When unpacking, make sure that the
item is intact and undamaged. If any parts
are missing or broken, please call Harbor
Freight Tools at 1-800-444-3353 as soon
as possible.
This air tool may be shipped with a
protective plug covering the air inlet.
Remove this plug before set up.
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.
Quick
Coupler
Dryer
Recommended Air Line Components
Regulator with
Pressure Gauge
Quick
Coupler Air Hose
on Reel
Valve Filter
Male
Connector
Tool
Air
Compressor
Male
Connector
Figure 3
1. 
pressure gauge, dryer, in-line shutoff
valve, and quick coupler for best ser-
vice, as shown in the diagram above.
An in-line shutoff ball valve is an
important safety device because it
controls the air supply even if the
air hose is ruptured. The shutoff
valve should be a ball valve be-
cause it can be closed quickly.
Note: Do not use an oiler system with this
tool. The oil will mix with the material
being propelled, causing poor results.
Attach an air hose to the compres-2.
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

WARNING! TO PREVENT SERIOUS
INJURY FROM ACCIDENTAL
OPERATION: 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.
Note: -
mance, can be hindered by under-
sized air supply components.
The air hose must be long enough3.
to reach the work area with enough
extra length to allow free movement
while working.
Release the tool’s Trigger (36).4.
-5.
tween the compressor and the tool -
See Figure 3.
Turn on the air compressor according6.
to the manufacturer’s directions and
allow it to build up pressure until it
cycles off.
7.
regulator so that the air output is

For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
SKU 66801 Page 10
enough to properly power the tool,
but the output will not exceed the
tool’s maximum air pressure at any

while checking the air output gauge
to set the right pressure range.
Inspect the air connections for leaks.8.
Repair any leaks found.
If the tool will not be used at this9.
time, turn off and detach the air sup-
ply, safely discharge any residual air
pressure, and release the throttle
and/or turn the switch to its off posi-
tion to prevent accidental operation.
Note: Residual air pressure should not be
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.
OPERATING INSTRUCTIONS
Read the ENTIRE
IMPORTANT SAFETY
INFORMATION section at
the beginning of this manu-
al including all text under sub-
headings 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.
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
Trigger (36) before performing
any inspection, maintenance,
or cleaning procedures.
Filter with MoistureTrap
The Filter with Moisture Trap can be1.
connected to the Air Inlet (35) to help
eliminate any moisture from entering
the tool. To install and operate the
Filter:
Thread the Filter onto the Air Inleta.
(35) then thread the other end of the
Filter to the compressor.
As moisture builds up in the Filterb.
container during use, press the re-
lease valve as needed to empty the
moisture trap.
Do not let the moisture build up toc.
more than 1/4 full of moisture inside
the Trap.

IMPORTANT: Clean the Spray Gun IMMEDIATELY after use.
Improper cleaning will cause the Spray Gun not to work.
SKU 66801 Page 11
For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
Fan Direction
Figure 4
Horizontal Fan

Fan
Air Cap (1)

1. To change the direction of the fan
from horizontal to vertical, loosen the



4.
Pattern Adjustment
WARNING! Never exceed the Maxi-
mum operating pressure.
-1.
eration with the Trigger (36) fully
depressed and the Air Control Knob
(19) fully open. If you need to reduce


air compressor.
Figure 5
Flat/Open Round/Closed
2. 

Knob (23). Turn the Pattern Control
Knob counterclockwise (all the way

Turn it clockwise for a round spray
pattern - See Figure 5.
Turn the Fluid Control Knob (12)3.
clockwise until it is fully closed.
Figure 6
Too Fine

Too Coarse
(Tighten)
Correct
4. After setting up a piece of scrap
material, squeeze the Trigger (36)
in short bursts while tuning the Fluid
Control Knob (12) 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

pressure or allow more material to
come out by opening the Fluid Con-
trol Knob (12). If the spray appears
too thick (you see globs of paint),
close down the Fluid Control Knob
slowly, checking the mixture after

next to the Fluid Control Knob to lock
the setting in place.
Work Piece and Work Area Set Up
Designate a work area that is clean1.
and well-lit. The work area must not
allow access by children or pets to

Route the air hose along a safe route2.
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

IMPORTANT: Clean the Spray Gun IMMEDIATELY after use.
Improper cleaning will cause the Spray Gun not to work.
SKU 66801 Page 12
For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
the work area with enough extra
length to allow free movement while
working.
Use in a well-ventilated area. Avoid3.
any ignition sources such as open

not smoke. Fluid and solvents can be

4.
-
niture with drop cloths (not included).
General Operating Instructions
HVLP vs. Conventional Spray Guns
Conventional

Figure 7
Because conventional spray guns re-
quire a much higher air cap pressure

Guns, conventional guns have lower
-


in addition to making them more envi-
ronmentally friendly.
 
air pressure going in the Air Cap
(1) must be a maximum of 10 PSI.
The lower the air pressure, the less
bounce back and overspray.
Due to the viscosity of latex and
other water-based paints, they are

paint spraying systems.
Preparation
Note: Proper paint material mixture helps
to ensure less problems. Follow
the manufacturer’s directions. Most
materials will spray readily if they are
thinned properly.
General Tips for Preparation:
Mix and thin the paint/materials1.
thoroughly according to the manufac-
turer’s directions.
Carefully strain the paint/material2.
through a paint strainer or piece of
cheese cloth.
Fill the Cup (6) to approximately 3/43.
full.
Start the air compressor.4.
5.
piece of scrap material to practice on.
While practicing on the scrap mate-
rial, check to see that the material
you are spraying has the appropriate
consistency. If it appears too thick,
add a very small amount of thinner
(not included). Use the proper thinner
for the type of paint you are using. BE

slowly, adding very minimal amounts.

thinning recommendations.
To use the Digital gauge:6.

IMPORTANT: Clean the Spray Gun IMMEDIATELY after use.
Improper cleaning will cause the Spray Gun not to work.
SKU 66801 Page 13
For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
Press the Red Button while spray-a.
ing. The Digital Display Screen will
display the units of air pressure.
Press the Red Button again to con-b.
vert the units between Bar and PSI.
The screen will continue to displayc.
the air pressure for one minute, then
it will automatically shut off to save
battery power.
Techniques
Figure 8
Correct (90o)
Incorrect
(Heavier coat on
one side = uneven
coverage)
(Even coverage)
1. Keep the gun at a right angle to the
workpiece - See Figure 8. Pull the
Trigger (36) slowly and move the
Spray Gun in parallel strokes to the
-

6” to 9”. This may slightly differ de-

the material being sprayed.
Figure 9

End
Stroke
Begin
Stroke
Release
Trigger
Squeeze
Trigger
2. To avoid paint build up, start moving
the Spray Gun before you squeeze
-
ished spraying, release the Trigger
before you stop moving the Spray
Gun. Doing so will eliminate distinct
overlaps, producing a blended (feath-
ered) affect - See Figure 9.
Note:-
ment of the Fluid Control Knob (12),
and the distance from the workpiece,
will determine how much paint is be-
ing applied. To get the best results,
try to apply two thin coats of paint
versus one thick coat.
To prevent accidents, turn off the3.
tool, detach the air supply, safely
discharge any residual air pressure in
the tool, and release the Trigger (36)
after use.
Clean out the gun thoroughly im-4.
mediately after EVERY use, ac-
cording to the instructions found
on the following pages.

SKU 66801 Page 14
For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
IMPORTANT: Clean the Spray Gun IMMEDIATELY after use.
Improper cleaning will cause the Spray Gun not to work properly.
Materials dry quickly which will render the gun useless.
It is extremely difcult to remove dry paint from small passages within the Gun.
USER-MAINTENANCE
INSTRUCTIONS
Procedures not specically
explained in this manual
must be performed only by a
qualied technician.
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
Trigger (36) before performing
any inspection, maintenance,
or cleaning procedures.
TO PREVENT SERIOUS
INJURY FROM TOOL
FAILURE:
Do not use damaged
equipment. If abnormal
noise, vibration, or leaking
air occurs, have the problem
corrected before further use.
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.
Use the Accessory tools shown in
the Components and Controls section
on page 8 to disassemble the tool for
cleaning.
Solvent Selection
Follow the paint manufacturer’s rec-
ommendations for cleaning, solvent
type, and disposing of used solvent.
Latex Paints1. : Use warm, soapy
water.
IMPORTANT: Do not use mineral
spirits on latex paints or the mixture

remove.
Oil Based Paints2. : Use mineral spir-
its.



USED, ADHERE TO THE
  
Follow all of the solvent manufactur-3.
er’s clean up instructions and safety
precautions at all times.
Flush the Spray Gun a full hose4.
length from the air compressor.
5.
metal container, transfer into a large

metal container.
Work far away from any ignition6.
sources in a vapor free area.
If using outdoors, stand downwind.7.
After each use:
Empty the Paint Cup and clean it with1.
the solvent.

SKU 66801 Page 15
For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
IMPORTANT: Clean the Spray Gun IMMEDIATELY after use.
Improper cleaning will cause the Spray Gun not to work properly.
Materials dry quickly which will render the gun useless.
It is extremely difcult to remove dry paint from small passages within the Gun.
Fill the Paint Cup with solvent and2.
spray it through the Gun into a con-
tainer, while shaking the gun. Once
the Paint Cup is empty, repeat the
process until the solvent comes out
clean.
Disconnect from the air source.3.
After disconnecting, be aware that air4.
pressure may still remain in the Spray
Gun. Point the Gun into the spent
solvent container and squeeze the
Trigger (36) again to make sure no air
remains.
9-Way Flat
Wrench
Fluid Control
Knob (12)
Needle
Spring (10)
Air Cap (1) Needle (9)
Figure 10
5. Disassemble the tool using the tools
provided. Use the 9-Way Flat Wrench
to remove the Air Cap (1). Unscrew
the Fluid Control Knob (12) and care-
fully remove the Needle Spring (10)
and Needle (9).
9-Way Flat
Wrench
Air Cap (1)
Nozzle (2)
Hex Adapter
Figure 11
Ring (3)
(not shown)
6. Use the Hex Adapter with the 9-Way
Flat Wrench to remove the Nozzle
and the Ring (3).
Soak the Air Cap, Nozzle, Ring and7.
Needle in solvent to clean. Use the
included brush or an old toothbrush
and toothpicks to remove any mate-
rial.
Note: Do not use metal objects to clean
the Air Cap (1) or you may damage
the drilled passages.
8.
sure it is not bent. If it is bent, have it
-
cian.
WARNING! Do not immerse the
Spray Gun Body in solvent!
Use the appropriate solvent (depend-9.
ing on the material sprayed) to wipe
down the Gun body.
Reassemble and lubricate the thread-10.
ed connections of the Spray Gun
after cleaning. You may use a non-
silicon oil or a light lubricant on all

SKU 66801 Page 16
For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
IMPORTANT: Clean the Spray Gun IMMEDIATELY after use.
Improper cleaning will cause the Spray Gun not to work properly.
Materials dry quickly which will render the gun useless.
It is extremely difcult to remove dry paint from small passages within the Gun.
threaded connections prior to storing
the unit.
Solution Disposal
After cleaning your Spray Gun, prop-
erly dispose of your cleaning solu-
tions according to the solution manu-
facturer’s directions and local hazard-
ous waste standards.
Daily - Air Supply Maintenance
Every day, perform maintenance on
the air supply according to the com-
ponent manufacturers’ instructions.
Changing the Digital Display Batteries
To change the batteries of the Digital
Display:
Unscrew the Battery Cover on thea.
back of the Handle, behind the Digi-
tal Display.
Remove the old batteries.b.
Replace with two new batteriesc.
-
tive side facing you as you install the
batteries.
Replace the Battery Cover.d.
Caution! Do not use the paint
sprayer if the Digital Display is
broken or damaged. Have the tool
serviced by a qualied technician.

IMPORTANT: The Spray Gun must be cleaned immediately after use.
Improper cleaning is a common reason for the Spray Gun not to work.
SKU 66801 Page 17
For technical questions, please call 1-800-444-3353;
If the steps above do not solve the problem or if the repairs
involved are too complex, contact a qualied technician.
Troubleshooting
Spray Pattern Diagnosis
The drawings on the left below resemble symptoms of spray pattern problems. Please
refer to the accompanying possible problems and solutions if you are experiencing

Problem Possible Causes Likely Solutions
The Pattern Control Knob1.
(23) is partially closed.
The material is too thick.2.
The air pressure is too low.3.
Open Pattern Control Knob (23).1.
Thin material according to the2.
manufacturer’s instructions.
Increase air pressure within the Maximum3.
PSI (MAX).
High air pressure.1.
2.
Pattern Control Knob (23)3.
open too much.
Reduce air pressure.1.
2.
Partially close Pattern Control Knob (23).3.
Air Cap (1) plugged.1.
Air Cap (1) loose or dirty seal.2.
3.
Clean the Air Cap (1).1.
Clean and tighten Air Cap (1) and seal.2.
Use a nonmetallic point to clean the Air Cap3.
(1).
1.
tip.
Holes on one side of the Air2.
Cap (1) are plugged.
1.
Clean the Air Cap (1) passages with a2.
nonmetallic point.
Follow all safety precautions whenever diagnosing or servicing the
tool. Disconnect air supply before service.

IMPORTANT: The Spray Gun must be cleaned immediately after use.
Improper cleaning is a common reason for the Spray Gun not to work.
SKU 66801 Page 18
For technical questions, please call 1-800-444-3353;
If the steps above do not solve the problem or if the repairs
involved are too complex, contact a qualied technician.
Troubleshooting (continued)
Problem Possible Causes Likely Solutions
Sputtering Spray 1.
Cup tipped too far.2.
3.
4.
5.
Packing Nut.
6.
1.
Hold upright.2.
Clean vent hole.3.
Tighten inlet connections.4.
5.
Packing Nut.
6.
Will Not Spray No pressure at gun.1.
Fluid control not open enough.2.
Fluid too thick.3.
Check air hoses.1.
2.
3.
Maximum range).
Overspray Improper application speed.1.
Improper distance from2.
workpiece.
Too much air pressure.3.
Move moderately and parallel.1.
2.
Reduce air pressure.3.
 Dirty tip.1.
Tight Packing Nut.2.
3.
Worn or damaged tip.4.
Clean tip.1.
2.
3.
Replace tip and/or needle.4.

Air Cap (1)
Dirty air valve/seat.1.
Sticking air valve.2.
Damaged air valve spring.3.
Worn/damaged air valve/seat.4.
Bent valve stem.5.
Clean air valve/seat.1.
2.
Replace air valve spring.3.
Replace air valve.4.
Replace air valve.5.

from Packing Nut
1.
Packing worn or dry.2.
Tighten without restricting.1.
Replace or lubricate (non-silicone)2.
Follow all safety precautions whenever diagnosing or servicing the
tool. Disconnect air supply before service.

For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
SKU 66801 Page 19
PARTS LIST
Part Description Qty
1 Air Cap 1
2 Nozzle 1
3 Ring 1
4 Body 1
5 Pain Inlet 1
6 Cup Assembly 1
7 Needle Washer 1
8 Needle Sealed Screw 1
9 Needle 1
10 Needle Spring 1
11 Needle Nut 1
12 Fluid Control Knob 1
13  1
14  1
15  1
16 Cross Spiral Bolt 1
17  1
18  1
PARTS LIST
Part Description Qty
19 Air Control Knob 1
20  1
21  1
22 Pattern Sealed Gasket 1
23 Pattern Control Knob 1
24 Cross Bolt 1
25  1
26  1
27 O-Ring 1
28  1
29 O-Ring 1
30  1
31 Trigger Pin 1
32 Saddle-backed Flexible Gasket 1
33 Trigger Pin With Hole 1
34 Hatching Circle 1
35 Air Inlet 1
36 Trigger 1
ASSEMBLY DIAGRAM
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.

For technical questions, please call 1-800-444-3353;
Troubleshooting section near the end of manual.
SKU 66801 Page 20
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.

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-


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-
-
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.

which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • [phone]
PLEASE READ THE FOLLOWING CAREFULLY


DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT






