Central Pneumatic 42202 Owner's Manual & Safety Instructions
Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, 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. 17e
Email our technical support at: productsupport@harborfreight.com
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright© 2000 by Harbor Freight Tools®. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in
Manual Revised 11h
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.
To ol s re q u ir e d fo r as s e mb l y a n d s e r vi c e m a y n o t b e in c l ud e d .
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.
CONTENTS
SAFETY ALERT SYMBOL AND
SIGNAL WORDS .............................3
IMPORTANT SAFETY
INSTRUCTIONS .......................... 3
GENERAL ...........................................3
WORK AREA ......................................3
PERSONAL SAFETY ......................... 3
TOOL USE AND CARE ......................4
SERVICE ............................................ 5
AIR SOURCE ......................................5
SYMBOLS AND SPECIFIC
SAFETY INSTRUCTIONS ........... 5
SYMBOL DEFINITIONS ..................... 5
FUNCTIONAL DESCRIPTION ....... 8
BLAST GUN PARTS LIST &
PARTS DIAGRAM ..................... 17
90 DAY WARRANTY .................... 18
SPECIFICATIONS .............................. 8
COMPONENTS AND CONTROLS ....8
INITIAL TOOL SET UP/
ASSEMBLY .................................. 9
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 ........................ 13
CLEANING AND MAINTENANCE ... 13
TROUBLESHOOTING ......................15
BLAST CABINET PARTS LIST
& ASSEMBLY DIAGRAM .......... 16
Page 2 For technical questions, please call 1-888-866-5797. Item 42202
SAVE THIS MANUAL
Keep this manual for the safety
warnings and precautions, assembly,
operating, 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
provided with this product:
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
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.
WARNING – When using power tools,
basic precautions should always be
followed, including the following:
General
To reduce the risk of injury to
persons, read all the instructions
before using the tool.
Work area
a. Keep the work area clean and well
lighted. Cluttered benches and dark
areas increase the risk of electric
shock, fire, and injury to persons.
b. Keep bystanders, children, and
visitors away while operating a
power tool. Distractions can result in
the loss of control of the tool.
Personal safety
a. Stay alert. Watch what you are
doing and use common sense
when operating a power tool. Do
Page 3For technical questions, please call 1-888-866-5797.Item 42202
not use a power tool while tired
or under the influence of drugs,
alcohol, or medication. A moment
of inattention while operating a power
tool increases the risk of injury to
persons.
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.
c. Avoid unintentional starting.
Be sure the trigger is off before
connecting to the air supply. Do not
carry the tool with your finger on the
trigger or connect the tool to the air
supply with the trigger engaged.
d. Do not overreach. Keep proper
footing and balance at all times.
Proper footing and balance
enables better control of the tool in
unexpected situations.
e. Use safety equipment. A
dust mask, non-skid safety
shoes and a hard hat must
be used for the applicable
conditions.
f. Always wear eye
protection. Wear ANSIapproved safety goggles.
g. Always wear hearing
protection when using
the tool. Prolonged
exposure to high intensity
noise is able to cause hearing loss.
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 trigger
does not turn the tool on or off.
Any tool that cannot be controlled
with the trigger is dangerous and
must be repaired.
c. Disconnect the tool from the
air source before making
any adjustments, 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
trigger before leaving the work area.
d. Store the tool when it is idle out
of reach of children and other
untrained persons. A tool is
dangerous in the hands of untrained
users.
e. Maintain the tool with care.
Keep the tool clean and free of
obstructions. A properly maintained
tool reduces the risk of accidents and
is easier to control.
f. Check for misalignment or binding
of moving parts, breakage of
parts, and any other condition
that affects the tool’s operation.
If damaged, 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.
Page 4 For technical questions, please call 1-888-866-5797. Item 42202
g. 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.
SYMBOLS AND
SPECIFIC SAFETY
INSTRUCTIONS
Symbol Denitions
Service
a. Tool service must be performed
only by qualified repair personnel.
Service or maintenance performed by
unqualified personnel could result in
a risk of injury.
b. When servicing a tool, use only
identical replacement parts. Use
only authorized 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.
Symbol Property or statement
n
o
.../min
PSI
ft-lb
BPM
CFM
SCFM
NPT
NPS
No-load speed
Revolutions or reciprocation per
minute
Pounds per square inch of pressure
Foot-pounds of torque
Blows per minute
Cubic Feet per Minute ow
Cubic Feet per Minute ow at
standard conditions
National pipe thread, tapered
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 NIOSHapproved dust mask/respirator.
WARNING marking concerning Risk
of Explosion.
Specific Safety Instructions
1. Attach all accessories properly to the
tool before connecting the air supply.
A loose accessory may detach or
break during operation.
Page 5For technical questions, please call 1-888-866-5797.Item 42202
2. Disconnect air hose and release any
built-up air pressure. Do not service
or disassemble the Blast Cabinet
with the air hose attached. Always
release any built-up air, even after
disconnecting hose.
3. Avoid working alone. If an accident
happens, an assistant can bring help.
4. Maintain labels and nameplates
on the Blast Cabinet. These
carry important information. If
unreadable or missing, contact
Harbor Freight Tools for a
replacement.
5. Maintain a firm grip on the Blast
Gun when in use.
6. Never point the Blast Gun toward
yourself, other people, or animals.
Keep all people and animals safely
away from the work area.
7. Industrial applications must follow
OSHA requirements.
in an emergency, even if a hose is
ruptured.
Silicosis and Aluminum Oxide
Warnings
Warning: Abrasive blasting with sand
containing crystalline silica can
cause serious or fatal respiratory
disease. Exposure to crystalline
silica may cause silicosis (a serious
lung disease), cancer and death.
Exposure to aluminum oxide (a dust
generated from material removing
processes) can result in eye, skin
and breathing irritation. Always
use a NIOSH (National Institute for
Occupational Safety and Health)
approved respirator and safety
goggles. Avoid skin exposure.
Proper ventilation in the work area is
required. Read and understand the
10 recommended measures below to
reduce crystalline silica exposures in
the workplace and prevent silicosis
and silicosis related deaths.
8. Whenever possible, perform an
abrasive blasting test on a small
area of the object to be blasted.
If necessary, adjust the distance to
the object and/or change the Nozzle
of the Blast Gun for more effective
results.
9. Read and understand all safety
warnings and precautions as
outlined in the manufacturer’s
manual for the object you intend to
blast with abrasives.
10. Obey the manual for the air
compressor used to power this tool.
11. Install an in-line shutoff valve to allow
immediate control over the air supply
NIOSH recommends the following
measures to reduce crystalline silica
exposures in the workplace and
prevent silicosis and silicosis-related
deaths:
1. Prohibit silica sand (or other
substances containing more than
1% crystalline silica) as an abrasive
blasting material and substitute less
hazardous materials.
2. Conduct air monitoring to measure
worker exposures.
3. Use containment methods such as
blast-cleaning machines and cabinets
to control the hazard and protect
adjacent workers from exposure.
Page 6 For technical questions, please call 1-888-866-5797. Item 42202
4. Practice good personal hygiene to
avoid unnecessary exposure to silica
dust.
5. Wear washable or disposable
protective clothes at the work site.
Shower and change into clean
clothes before leaving the work site to
prevent contamination of cars, homes
and other work areas.
use. Pregnant women or people
who have impaired blood circulation
to the hand, past hand injuries,
nervous system disorders, diabetes,
or Raynaud’s Disease should not use
this tool. If you feel any symptoms
related to vibration (such as tingling,
numbness, and white or blue fingers),
seek medical advice as soon as
possible.
6. Use respiratory protection when
source controls cannot keep silica
exposures below the NIOSH REL.
7. Provide periodic medical
examinations for all workers who may
be exposed to crystalline silica.
8. Post signs to warn workers about
the hazard and to inform them about
required protective equipment.
9. Provide workers with training that
includes information about health
effects, work practices and protective
equipment for crystalline silica.
10. Report all cases of silicosis to State
health departments and to OSHA
or the Mine Safety and Health
Administration (MSHA).
Vibration Precautions
This tool vibrates during use.
Repeated or long-term exposure to
vibration 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 regularly
or for an extended period should
first be examined by a doctor and
then have regular medical checkups to ensure medical problems are
not being caused or worsened from
2. Do not smoke during use. Nicotine
reduces the blood supply to the
hands and fingers, 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.
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.
8. The warnings and precautions
discussed in this manual cannot
cover all possible conditions and
situations that may occur. It must
be understood by the operator that
common sense and caution are
factors which cannot be built into this
product, but must be supplied by the
operator.
SAVE THESE
INSTRUCTIONS.
Page 7For technical questions, please call 1-888-866-5797.Item 42202
FUNCTIONAL DESCRIPTION
INITIAL TOOL SET UP/
Specifications
Compressor
Requirements
Air Inlet 1/4″ NPT
Nozzle Type
Air Consumption 10 CFM @ 100 PSI
Operating Air Pressure Up to 100 PSI
Hopper Capacity 30 lb
Use of 3/8″ supply hose is recommended.
1 HP or larger
compressor
Ceramic - .18″, .19″,
.22″, .27″
Components and Controls
Tempered
Glass Window
(23)
Side Door (3)
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, make sure that
the is intact and undamaged. If any
parts are missing or broken, please call
Harbor Freight Tools at 1-888-866-5797 as
soon as possible.
Glove Port (16)
Siphon Tube (12)
Window Liners (22)
Siphon Hose (8)
Figure 1
Door
Latch
(5)
Hopper (13)
Hex
Wrench
Blast Gun (7)
Air Hose Connector (30)
Ceramic
Nozzles
(13A - 16A)
• 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.
Page 8 For technical questions, please call 1-888-866-5797. Item 42202
Coupler
Plug
Tool
Quick
Coupler
Valve Filter
Dryer
Coupler
Plug
Air Hose
on Reel
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: Air flow, and therefore tool
performance, can be hindered by
undersized air supply components.
Air
Compressor
Quick
Coupler
Regulator with
Pressure Gauge
Recommended Air Line Components
1. Incorporate a filter, regulator with
pressure gauge, dryer, in-line shutoff
valve, and quick coupler for best
service, 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 because it can be closed
quickly.
Note: An oiler system should not be used
with this tool. The oil will mix with
the material being propelled, causing
poor results.
2. To test the unit, attach an air hose to
the compressor’s air outlet. Connect
the air hose to the air inlet of the tool.
Other components, such as a coupler
plug and quick coupler, will make
operation more efficient, but are not
required.
WARNING! TO PREVENT SERIOUS
INJURY FROM ACCIDENTAL
OPERATION:
Do not install a female quick
3. Close the in-line safety valve between
the compressor and the tool.
4. Make sure the Trigger of the Blast
Gun (7) is not engaged.
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,
until the desired pressure is reached.
7. Inspect the air connections for leaks.
Repair any leaks found.
8. 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 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.
Page 9For technical questions, please call 1-888-866-5797.Item 42202
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 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:
Release the Trigger, detach
the air supply, safely
discharge any residual air
pressure in the tool, and
release the Trigger again
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 specifically explained
within this manual. Improper
adjustment can result in
tool failure or other serious
hazards.
Dust Collection Outlet
Blast Gloves (18)
Door Latch
(5)
Hole in Metal
Floor
for Siphon
Tube (12)
Hopper (13)
Siphon-Gun Assembly
Cap (9)
(underneath unit)
Air
Hose
Inlet
Vent
Metal
Floor
(14)
Figure 2
1.
Remove any protective film from
the outside of the Tempered Glass
Window (23), or any other part of the
Blast Cabinet.
2. Remove the protective backing from
one of the three Window Liners (22)
and adhere it to the inside of the
Tempered Glass Window (23).
3. To install or change the Ceramic
Nozzle, use the Hex Wrench to
loosen the Set Screw (11A) closest
to the tip of the Blast Gun. Slide the
desired Nozzle in place and tighten
the Set Screw.
Note: By changing to the next larger size
of Nozzle, production can increase
significantly. Larger size Nozzles
produce a larger cleaning pattern.
This also requires a higher air
pressure and greater air flow.
Page 10 For technical questions, please call 1-888-866-5797. Item 42202
4. Slide one end of the Siphon Hose (8)
onto the Siphon Tube (12) and the
other end onto the Blast Gun (7).
5. Insert the Siphon Tube through the
corner opening of the Metal Floor
(14) so that it is resting in the Hopper
(13).
vacuum. Use the appropriate vacuum
for the job.
Work Piece and Work Area Set Up
1. Designate a work area that is clean
and well-lit. The work area must not
allow access by children or pets to
prevent distraction and injury.
2. Route the air hose along a safe
route to reach the work area without
creating 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.
3. Place the Blast Cabinet on a sturdy
level work surface, positioning
the Cabinet at a level so that you
can comfortably access the Glove
openings and easily see into the
Blast Cabinet through the Tempered
Glass Window (23). The work surface
needs to be able to support the
weight of the Blast Cabinet and the
abrasive which will fill the Hopper,
the work piece and any additional
material required to be close at hand.
4. If needed, position a light (sold
separately) so the interior of the Blast
Cabinet is well lit (use only utility light
bulbs).
5. It is recommended that you set
up a vacuum dust collector (sold
separately) to remove media dust
while blasting. Attach the vacuum
hose through the Dust Collection
Outlet.
When using a vacuum dust collector,
clean the filter periodically to maintain
good suction and effectiveness of the
6. Fill the Hopper (13) with
approximately 10 pounds of an
appropriate abrasive, such as glass
beads or walnut shells, checking to
ensure that the abrasives are dry and
clean. Do not use harsh abrasives
such as steel shot or aluminum oxide.
7. Set the compressor’s pressure
regulator to 100 PSI. Do not set it
over 100 PSI.
8. Route the compressor hose from the
outside of the Cabinet to the inside
through the Air Hose Inlet in the back
of the Cabinet, then connect it to the
Air Hose Connector (30) on the Blast
Gun inside the Cabinet.
9. Holding the Blast Gun so that it is
pointing away from you, open the
shut-off valve. If leaking is detected,
disconnect the air hose and repair
before use.
General Operating Instructions
WARNING: Wear ANSI-approved safety
goggles, full face shield and a
NIOSH-approved protective dust
mask or respirator when using the
Blast Cabinet.
1. Place the material to be sandblasted
on the Metal Floor (14) inside the
Blast Cabinet.
2. Close the Side Door (3) and hook the
Door Latch (5) over the door flange
and lock in place. Check to make
sure the Latch is secured.
3. Place your hands into the Blast
Gloves, making sure your fingers are
in the proper positions and that you
Page 11For technical questions, please call 1-888-866-5797.Item 42202
can easily move your hands and grip
objects.
4. Grip the gun with one hand. Point the
nozzle at the bottom of the Cabinet
and operate the Gun for a moment
to ensure everything is working
correctly. If leaking is detected, or
blasting material dust is escaping
the side door seals, disconnect the
air hose and have it repaired before
using.
5. Hold the object you are working with
in your other hand. Position your
fingers so the Blast Glove (18) is
not in the way of the area you are
blasting. You may have to re-position
your fingers many times during the
blasting to ensure that you reach
every area of your object.
6. Squeeze the Trigger on the Blast
Gun to begin operation. Release the
Trigger to stop.
Aim the nozzle directly at the surface
of the material. Bring the nozzle
to within 2 inches of the material if
necessary. Move the Gun in a sideto-side or circular motion, always
making sure that your fingers are not
in the way.
Note: Use caution when sandblasting
unfamiliar material. Test the tool on
a small area before proceeding. This
will ensure you will not damage or pit
the material you wish to sandblast.
WARNING: Do not aim the gun at your
fingers or the Blast Gloves. Do not
operate the gun with the Side Door
open or outside of the Blast Cabinet.
8. If the tool requires more force to
accomplish the task, verify that the
tool receives sufficient, unobstructed
airflow (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 sufficient
force at maximum pressure and
sufficient airflow, then a larger tool
may be required.
9. Once completed, remove your hands
from the Gloves and shut off the
compressor. Open the Side Door and
remove your material from the Blast
Cabinet.
Use even passes of the Gun to
remove rust, body filler, or other soft
materials.
7. To check on the progress of your
blasting, remove your hand from
the gun first and pull your hand
from the Glove. Remove your other
hand. Once the gun is off, open the
door and inspect your material. If
additional blasting is required, follow
steps 1 through 7 as needed.
Page 12 For technical questions, please call 1-888-866-5797. Item 42202
10. To prevent accidents, turn off the
tool, detach the air supply, safely
discharge any residual air pressure in
the tool, and release the Trigger after
use. Clean external surfaces of the
tool with a clean, dry cloth, and apply
a thin coat of tool oil. Then store the
tool indoors out of children’s reach.
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