Harbor Freight Tools 98751 User Manual
3-IN-1 AIR FRAMING NAILER
98751
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 11a
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 Information
IMINSTRUCTIONS
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.
CAUTION, used
with the safety
alert symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate injury.
INSTRUCTIONS PERTAINING
TO A RISK OF FIRE,
ELECTRIC SHOCK, OR
INJURY TO PERSONS
WARNING – When using
tools, basic precautions
should always be followed,
including the following:
General
a. To reduce the risks of electric
shock, re, and 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 risks of electric
shock, re, and injury to persons.
b. Do not operate the tool in explo-
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.
c. Keep bystanders, children, and
visitors away while operating the
SKU 98751 For technical questions, please call 1-800-444-3353. Page 2
tool. Distractions are able to result in
the loss of control of the tool.
Personal safety
a. Stay alert. Watch what you are do-
ing and use common sense when
operating the tool. Do not use the
tool while tired or under the inuence of drugs, alcohol, or medication. A moment of inattention while
operating the 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 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.
d. Remove adjusting keys and
wrenches before turning the tool
on. A wrench or a key that is left at-
tached to a rotating part of the tool
increases the risk of personal injury.
e. Do not overreach. Keep proper
footing and balance at all times.
Proper footing and balance enables
better control of the tool in unexpected situations.
f. 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. Wear a full face
shield if you are producing metal
lings or wood chips.
g. Always wear eye protec-
tion. Wear ANSI-ap-
proved safety goggles with
side shields during use.
h. 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
a. Avoid unintentional
misres. Be sure Trigger
(59) is in the OFF position when not in use and
before plugging in. Do
not carry any tool with your nger on
the Trigger, whether it is attached to
an air source or not. Do not point tool
towards yourself or anyone whether it
contains nails or not.
b. Do not load nails with Trigger or
safety depressed. Unintentional r-
ing may occur. Always assume Nailer
contains fasteners.
c. Do not load fasteners when Nailer
is connected to air hose. Always
assume tool contains fasteners. Unin-
tentional ring may occur.
d. Properly adjust Nailer angle to
match corresponding fasteners
before inserting nail strip. Failure
to do so can cause Nailer to jam and
lead to personal and/or property damage.
e. Fire nails into an appropriate work
surface only. Do not attempt to re
SKU 98751 For technical questions, please call 1-800-444-3353. Page 3
cleat nails or staples into surfaces
too hard to penetrate. Do not drive
cleat nails or staples on top of other
cleat nails or staples, or at too steep
an angle. Cleat nails and staples can
ricochet, causing personal injury.
Never re this tool into the air or point
it toward yourself or another person.
f. Hold tool away from head and
body during use. Tool may kick
back, causing injury.
g. Do not re fasteners too close to
edge of workpiece. They may split
the workpiece and y free, causing
personal injury.
h. Carry tool safely. Carry tool by
handle.
i. Use clamps or another practical
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.
j. Do not force the tool. Use correct
tool for application. The correct tool
will do the job better and safer at the
rate for which the tool is designed.
k. 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
and safely discharge any residual
air pressure before leaving the work
area.
l. 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.
m. Maintain the tool with care. Keep
tool clean. A properly maintained tool,
reduces the risk of binding and is
easier to control.
n. 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.
o. Use only accessories that are
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
a. Tool service must be performed
only by qualied repair personnel.
b. When servicing a tool, use only
identical replacement parts. Use
only authorized parts.
c. Use only the lubricants supplied
with the tool or specied by the
manufacturer.
Air source
a. Never connect to an air
source that is capable of
exceeding 120 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 (70 to
120 PSI). Always verify prior to using
SKU 98751 For technical questions, please call 1-800-444-3353. Page 4
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 Denitions
Symbol Property or statement
WARNING marking concerning Risk
of Hearing Loss. Wear hearing
protection.
WARNING marking concerning Risk
of Respiratory Injury. Wear NIOSH-
approved dust mask/respirator.
WARNING marking concerning Risk
of Explosion.
Specic Safety Instructions
SYMBOLS AND
SPECIFIC SAFETY
INSTRUCTIONS
Symbol Denitions
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.
Chart continued in next column.
1. 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.
2. WARNING: Some dust created by
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
SKU 98751 For technical questions, please call 1-800-444-3353. Page 5
particles. (California Health & Safety
Code § 25249.5, et seq.)
3. Take caution, as some woods contain
preservatives such as copper chromium arsenate (CCA) which can be
toxic. When nailing these materials,
extra care should be taken to avoid
inhalation and minimize skin contact.
4. 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.)
5. Only use with accessories rated to
handle forces exerted by tool during
operation. Other accessories not designed for the forces generated may
break and forcefully launch pieces.
1. Anyone using vibrating tools regularly or for an extended period should
rst be examined by a doctor and
then have regular medical checkups 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, nervous system disorders, diabetes, or
Raynaud’s Disease should not use
this tool. If you feel any medical or
physical symptoms related to vibration (such as tingling, numbness, and
white or blue ngers), seek medical
advice as soon as possible.
2. Do not smoke during use. Nicotine reduces the blood supply to the
hands and ngers, increasing the risk
of vibration-related injury.
6. Attach all accessories properly to the
tool before connecting the air supply. A loose accessory may detach or
break during operation.
7. Obey the manual for the air compressor used to power this tool.
8. Install in-line shutoff valve to allow
immediate control over air supply in
emergency, even if hose is ruptured.
9. Do not lay tool down until it has completely stopped. Moving parts can
grab surface and lead to control loss.
Vibration Precautions
This tool vibrates during use. Re-
peated 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:
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 different 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 98751 For technical questions, please call 1-800-444-3353. Page 6
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