Harbor Freight Tools 66399 User Manual
HIGH-VOLUME 12VDC
AIR COMPRESSOR
66399
SET UP AND OPERATING INSTRUCTIONS
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.
Revised Manual 10d
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.
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
Safety Alert Symbol and Signal
Words
In this manual, on the labeling,
and all other information provided 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.
INSTRUCTIONS
INSTRUCTIONS PERTAINING
TO A RISK OF FIRE,
ELECTRIC SHOCK, OR
INJURY TO PERSONS
WARNING! THE METAL PARTS OF THE
COMPRESSOR AND HOSES WILL
BECOME HOT DURING USE.
WARNING – When using tools, basic pre-
cautions should always be followed,
including the following:
General
To reduce the risks of electric a.
shock, re, and injury to persons,
read all the instructions before using the tool.
Work area
Keep the work area clean and well a.
lighted.
CAUTION, used
with the safety
alert symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate injury.
SKU 66399 For technical questions, please call 1-800-444-3353. Page 2
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, and c.
visitors away while operating the
tool. Distractions are able to 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 inuence of drugs, alcohol, or medication. A moment of inattention while
operating the tool increases the risk
of injury to persons.
Avoid unintentional starting. Be b.
sure the switch is off before connecting to the air supply. Do not
carry the tool with your nger on the
switch or connect the tool to the air
supply with the switch on.
Do not overreach. Keep proper c.
footing and balance at all times.
Proper footing and balance enables
better control of the tool in unexpected situations.
Do not use the tool if the switch b.
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 air c.
source before making any adjustments, changing accessories, or
storing the tool. Turn the switch to
its off position and disconnect from
the battery.
Store the tool when it is idle out of d.
reach of children and other untrained persons. A tool is dangerous
in the hands of untrained users.
Maintain the tool with care. e.
Check for misalignment or bind-f.
ing of moving parts, breakage of
parts, air leaks, frayed wires, 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.
d. Always wear eye protec-
tion. Wear ANSI-approved safety goggles.
e. Always wear hearing
protection when using
the tool. Prolonged expo-
sure to high intensity noise
is able to cause hearing loss.
Tool use and care
Do not force the tool. a. 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.
SKU 66399 For technical questions, please call 1-800-444-3353. Page 3
Use only accessories that are g.
identied by the manufacturer for
the specic tool model. Use of an
accessory not intended for use with
the specic tool model, increases the
risk of injury to persons.
Service
Tool service must be performed a.
only by qualied repair personnel.
When servicing a tool, use only b.
identical replacement parts. Use
only authorized parts.
Use only the lubricants supplied c.
with the tool or specied by the
manufacturer.
SAVE THESE
INSTRUCTIONS.
SYMBOLS AND
SPECIFIC SAFETY
INSTRUCTIONS
Symbol Denitions
Specic Safety Instructions
Do not use cigarette lighter adap-1.
tor to power this unit. If powered
with the battery of a vehicle, start and
run engine during ination period.
The warnings and precautions dis-2.
cussed 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.
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.
WARNING: Some dust created by 3.
power sanding, sawing, grinding, drilling, 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 chemically treated lumber
Your risk from these exposures varies, depending on how often you do
this type of work. To reduce your
exposure to these chemicals: work in
a well ventilated area, and work with
approved safety equipment, such as
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 chemical known to the State of California
to cause birth defects (or other reproductive harm). (California Health &
Safety code § 25249.5, et seq.)
SKU 66399 For technical questions, please call 1-800-444-3353. Page 4
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