Central Pneumatic 66103 Installation manual

TEXTURE PAINT SPRAY GUN
66103
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.

SKU 66103 For technical questions, please call 1-800-444-3353. Page 2
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 this Texture
Paint Spray Gun, basic precautions
should always be followed, including:
General
a. To reduce the risks of electric
shock, re, and injury to persons,
read all the instructions before us-
ing.
Work area
a. Keep the work area clean and well
lighted. Cluttered benches and dark
areas increase the risks of personal
injury.
b. Keep bystanders, children, and
visitors away while operating the
Texture Spray Paint Gun. Distrac-
tions are able to result in the loss of
control.

SKU 66103 For technical questions, please call 1-800-444-3353. Page 3
Personal safety
a. Stay alert. Watch what you are do-
ing and use common sense when
operating. Do not use while tired
or under the inuence of drugs, al-
cohol, or medication. A moment of
inattention while operating increases
the risk of injury.
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 personal injury
as a result of being caught in moving
parts.
c. Avoid unintentional starting. Be
sure the switch is off before con-
necting to the air supply. Do not
carry the tool with your nger on the
Spray Gun Trigger, or connect the
tool to the air supply with the Trigger
depressed.
d. Do not overreach. Keep proper
footing and balance at all times.
Proper footing and balance enables
better control in unexpected situa-
tions.
e. Use safety equipment. A
dust mask, 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.
g. Always wear hearing
protection when using
the tool. Prolonged expo-
sure to high intensity noise is able to
cause hearing loss.
h. Risk of Electric Shock. This Tex-
ture Spray Paint Gun is not pro-
vided with an insulated gripping
surface. Contact with a ″live″ wire will
also make exposed metal parts of the
tool ″live″ and shock the operator.
i. Avoid body contact with grounded
surfaces such as pipes, radiators,
ranges and refrigerators. There is
an increased risk of electric shock if
your body is grounded.
Tool use and care
a. 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.
b. Do not use the tool if the switch
does not turn the tool on or off.
Any tool that cannot be controlled
with the switch is dangerous and
must be repaired.
c. 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 Gun Trigger before
leaving the work area.
d. Store the idle Texture Paint Spray
Gun out of reach of children and
other untrained persons. A tool is
dangerous in the hands of untrained
users.

SKU 66103 For technical questions, please call 1-800-444-3353. Page 4
e. Maintain the tool with care. Keep
this tool clean. A properly maintained
tool is easier to control.
f. 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.
g. 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
the specic tool model, increases the
risk of injury.
Service
a. Service on this Texture Paint Spray
Gun must be performed only by
qualied repair personnel.
b. When servicing, use only identical,
authorized replacement parts.
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,
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.
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.
SAVE THESE
INSTRUCTIONS.
SYMBOLS AND
SPECIFIC SAFETY
INSTRUCTIONS
Symbol Denitions
Symbol Property or statement
noNo-load speed
.../min Revolutions or reciprocation per
minute
PSI Pounds per square inch of pressure
ft-lb Foot-pounds of torque
BPM Blows per minute
CFM Cubic Feet per Minute ow
SCFM Cubic Feet per Minute ow at
standard conditions
NPT National pipe thread, tapered
NPS National pipe thread, straight
WARNING marking concerning Risk
of Eye Injury. Wear ANSI-approved
eye protection.
WARNING marking concerning Risk
of Hearing Loss. Wear hearing
protection.
WARNING marking concerning Risk
of Respiratory Injury. Wear NIOSH-
approved dust mask/respirator.
Chart continued in next column.

SKU 66103 For technical questions, please call 1-800-444-3353. Page 5
Symbol Denitions
Symbol Property or statement
WARNING marking concerning Risk
of Explosion.
Specic Safety Instructions
1. CAUTION: To prevent serious injury:
a. Do not exceed maximum air pres-
sure of 90 PSI.
b. Do not direct spray at any person, or
animal at any time.
c. Always wear ANSI-approved safety
goggles and breathing respirator
while using.
d. Use coveralls (disposable, or wash-
able) to cover entire body while us-
ing this product.
e. Read entire manual before using this
Texture Paint Spray Gun.
2. 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
cannot be built into this product, but
must be supplied by the operator.
3. WARNING: Some dust created by
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:
• Lead from lead-based paints
• Crystalline silica from bricks and
cement or other masonry products
• Arsenic and chromium from chemi-
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
designed to lter out microscopic
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.)
4. Only use with accessories rated to
handle the forces exerted by this tool
during operation. Other accessories
not designed for the forces gener-
ated may break and forcefully launch
pieces.
5. Attach all accessories properly to the
tool before connecting the air sup-
ply. A loose accessory may detach or
break during operation.
6. Install an in-line shutoff valve to allow
immediate control over the air supply
in an emergency, even if a hose is
ruptured.
Vibration Precautions
This tool vibrates during use. Re-
peated or long-term exposure to vibra-
tion may cause temporary or permanent
physical injury, particularly to the hands,
arms and shoulders. To reduce the risk of
vibration-related injury:
1. Anyone using vibrating tools regu-
larly or for an extended period should
rst be examined by a doctor and
then have regular medical check-

SKU 66103 For technical questions, please call 1-800-444-3353. Page 6
ups to ensure medical problems are
not being caused or worsened from
use. Pregnant women or people
who have impaired blood circulation
to the hand, past hand injuries, ner-
vous system disorders, diabetes, or
Raynaud’s Disease should not use
this tool. If you feel any medical or
physical symptoms related to vibra-
tion (such as tingling, numbness, and
white or blue ngers), seek medical
advice as soon as possible.
2. Do not smoke during use. Nico-
tine reduces the blood supply to the
hands and ngers, increasing the risk
of vibration-related injury.
3. Wear suitable gloves to reduce the
vibration effects on the user.
4. Use tools with the lowest vibration
when there is a choice between dif-
ferent processes.
5. Include vibration-free periods each
day of work.
6. Grip tool as lightly as possible (while
still keeping safe control of it). Let
the tool do the work.
7. To reduce vibration, maintain tool as
explained in this manual. If abnormal
vibration occurs, stop immediately.
SAVE THESE
INSTRUCTIONS.

SKU 66103 For technical questions, please call 1-800-444-3353. Page 7
FUNCTIONAL DESCRIPTION
Specications
Operating Air Pressure
Range 25 - 90 PSI
Maximum Air Pressure 90 PSI
Air Inlet 1/4” -18 NPS
Air Consumption 7 CFM @ 25 PSI
Nozzle Size
4 mm (5/32”)
6 mm (15/64”)
8 mm (5/16”)
Hopper Capacity 1.5 gal
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.
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.
• 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.
Note: The use of an in-line air and water
separator installed between the lter
and the regulator is recommended.
1. 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 efcient, but are not required.
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

SKU 66103 For technical questions, please call 1-800-444-3353. Page 8
operate accidentally after the air
supply is disconnected.
Note: Air ow, and therefore tool perfor-
mance, can be hindered by under-
sized air supply components.
2. The air hose must be long enough
to reach the work area with enough
extra length to allow free movement
while working.
3. Make sure the tool’s throttle or switch
is in the off position; refer to Opera-
tion section for description of con-
trols.
4. Close the in-line safety valve be-
tween the compressor and the tool.
5. Turn on the air compressor according
to the manufacturer’s directions and
allow it to build up pressure until it
cycles off.
6. 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.
7. Inspect the air connections for leaks.
Repair any leaks found.
8. 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 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 not pow-
ered.
OPERATING INSTRUCTIONS
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 this Texture Spray Paint
Gun 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
throttle and/or turn the switch
to its off position before
performing any inspection,
maintenance, or cleaning
procedures.
TO PREVENT SERIOUS
INJURY:
Do not adjust or tamper with
any control or component in a
way not specically explained
within this manual. Improper
adjustment can result in
tool failure or other serious
hazards.

SKU 66103 For technical questions, please call 1-800-444-3353. Page 9
Work Piece and Work Area Set Up
1. This Texture Paint Spray Gun is
meant for spraying heavy viscos-
ity products like rubberized decking
materials, texture coatings for interior
and exterior walls, heavy water proof-
ing materials, and the like. It is not
recommended for regular wall paint
or thin coatings of any type. While
these products can be used with this
Spray Gun, the results would not be
satisfactory, or even in coverage.
2. 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.
3. 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.
4. There must not be utility lines or
foreign objects nearby while working
that may present a hazard.
General Operating Instructions
1. Attach the Plastic Hopper (20) to the
top of the Gun Body (03) and tighten
the Hopper Clip (21) until the Plastic
Hopper is held securely in place.
2. Have an assistant pour the Texture
Paint mix into the top of the Plastic
Hopper lling no more than 3/4 full.
3. Turn on the air compressor and set
the air regulator between 25 and 90
PSI.
4. Using two hands, one to steady the
Plastic Hopper and the other to oper-
ate the Texture Paint Spray Gun, aim
the Spray Gun Nozzle at the surface
to be covered. NOTE: It may take a
few times to mix the proper spray
solution. Do not ll the Plastic
Hopper until you have achieved
the viscosity you need for each
job.
5. Squeeze the Gun Trigger (14) and
move the Texture Paint Spray Gun
in a back and forth motion, releasing
the Gun Trigger at the end of each
sweep.
6. If the product you are attempting to
spray either sputters, or stops spray-
ing, small adjustments in product
control may be made using the Fluid
Control Knob (8F), thinning the prod-
uct batch you are working with, or us-
ing a larger nozzle. NOTE: Nozzles
can be interchanged by un-thread-
ing the Nozzle attached to the
Spray Gun Body and threading on
a different sized Nozzle.
7. CAUTION: Do not stop for extended
periods when spraying. Most of the
products you are using are fast-dry
materials and will start to set-up and
dry as soon as they come in contact
with the air. If you need to discon-
tinue spraying for more than half an
hour, turn off the air supply, discon-
nect the Plastic Hopper from the Gun
Body and thoroughly rinse the Plastic
Hopper and Gun Body with fresh,
clear, water. The products you are
using can set-up quickly and if not
cleared from your equipment may
render that equipment unusable.

SKU 66103 For technical questions, please call 1-800-444-3353. Page 10
8. When you are completely nished or
are stopping for the day, disconnect
and empty the Plastic Hopper. Flush
the system with fresh cold water.
Rinse and clean the Plastic Hop-
per and the Gun Body and let both
dry completely before storing inside,
away from children.
9. If the tool requires more force to
accomplish the task, verify that the
tool receives sufcient, unobstructed
airow (CFM) and increase the
pressure (PSI) output of the regulator
up to the maximum air pressure
rating of this tool.
CAUTION! TO PREVENT TOOL
AND ACCESSORY FAILURE,
RESULTING IN INJURY:
Do not exceed the tool’s maximum
air pressure rating.
If the tool still does not have sufcient
force at maximum pressure and
sufcient airow, then a larger tool
may be required.
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 Gun
Trigger before performing any
inspection, maintenance,
nozzle changes, 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.
1. Daily - Air Supply Maintenance:
Every day, perform maintenance on
the air supply according to the com-
ponent manufacturers’ instructions.
Performing routine maintenance on
the air supply will allow the tool to
operate more safely and will also
reduce wear on the tool.

SKU 66103 For technical questions, please call 1-800-444-3353. Page 11
Troubleshooting
Problem Possible Causes Likely Solutions
Decreased output. 1. Not enough air pressure and/
or air ow.
2. Obstructed trigger.
3. Blocked air inlet screen (if
equipped).
4. Air leaking from loose
attachment.
5. Mechanism contaminated.
1. Check for loose connections and make sure
that air supply is providing enough air ow
(CFM) at required pressure (PSI) to the
tool’s air inlet. Do not exceed maximum air
pressure.
2. Clean around trigger to ensure free
movement.
3. Clean air inlet screen of buildup.
4. Make sure attachments are properly
assembled to the housing and are tight.
5. Have qualied technician clean and lubricate
mechanism. Install in-line lter in air supply
as stated in Initial Set Up: Air Supply.
Severe air
leakage.
(Slight air leakage
is normal,
especially on older
tools.)
1. Cross-threaded housing
components.
2. Loose housing.
3. Damaged valve or housing.
4. Dirty, worn or damaged valve.
1. Check for incorrect alignment and uneven
gaps. If cross-threaded, disassemble and
replace damaged parts before use.
2. Tighten housing assembly. If housing cannot
be tightened properly, internal parts may be
misaligned.
3. Replace damaged components.
4. Clean or replace valve assembly.
Product not
spraying correctly.
1. Material too thick/thin.
2. Nozzle to large/small.
1. Check material being sprayed for proper
viscosity. Ordinarily texture products should
be the consistency of heavy cream. Wall
Texturing products are usually a bit heavier
than deck protecting products.
2. If product is spraying to heavily, try using a
smaller Nozzle. Too light, change to a larger
Nozzle.
Follow all safety precautions whenever diagnosing or servicing the
tool. Disconnect air supply before service.
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND 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.

SKU 66103 For technical questions, please call 1-800-444-3353. Page 12
PARTS LIST
Part Description Q’ty
1 Retaining Ring 1
2A 4.0 mm (3/16”) Nozzle 1
2B 6.0 mm (1/4”) Nozzle 1
2C 8.0 mm (5/16) Nozzle 1
03 Gun Body 1
04 Nut Guide 1
06 Gun Needle 1
07 O-Ring X2 2
08 Needle Assembly 1
8A O-Ring X2 2
8B Fluid Control Knob Body 1
8C Washer 1
8D Spring 1
8E Screw 1
PARTS LIST
Part Description Q’ty
8F Fluid Control Knob 1
09 Cage 1
10 O-Ring 1
11A O-Ring 1
12 Air Inlet NIpple 1
14 Gun Trigger 1
15 E-Ring 2
16 Trigger Pin 1
18 Air Fitting 1
19 O-Ring 1
20 Plastic Hopper 1
21 Hopper Clip 1
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.
ASSEMBLY DIAGRAM

SKU 66103 For technical questions, please call 1-800-444-3353. Page 13
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 product 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 ac-
tivity, 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 EXPRESSLY
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 veries 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 specic 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 • [phone]