Page 1
2” 18-GAUGE BRAD NAILER
66995
SET UP AND OPERATING INSTRUCTIONS
Visit our website at: http://www.harborfreight.com
Read and understand tool labels and
manual. Failure to follow warnings could
result in DEATH or 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.
Page 2
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.
Symbol Denitions
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.
Symbol Property or statement
PSI
CFM
SCFM
NPT
NPS
Pounds per square inch of pressure
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
safety goggles with side shields.
Warning marking concerning Risk of
Puncture Injury. Wear heavy-duty
work gloves.
Read the manual before set-up and/
or use.
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.
SKU 66995 For technical questions, please call 1-800-444-3353. Page 2
Page 3
IMPORTANT SAFETY
INSTRUCTIONS
tion. A moment of inattention while
operating the tool increases the risk
of injury to persons.
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
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
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 medica-
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 released before
connecting to the air supply. Do not
carry the tool with your nger on the
trigger or connect the tool to the air
supply with the trigger pressed.
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. Wear heavy-duty work
gloves during use.
f. Always wear eye protec-
tion. Wear ANSI-ap-
proved safety goggles with
side shields.
g. Always wear hearing
protection when using
the tool. Prolonged expo-
sure to high intensity noise
is able to cause hearing loss.
h. Do not attach the hose or tool to
your body. Attach the hose to the
structure to reduce the risk of loss of
balance if the hose shifts.
SKU 66995 For technical questions, please call 1-800-444-3353. Page 3
Page 4
i. Always assume that the tool con-
tains fasteners. Do not point the tool
toward yourself or anyone whether it
contains fasteners or not.
e. 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.
j. WARNING – Do not re fastener on
top of another fastener. This is able
to cause the fastener to be deected
and hit someone, or cause the tool to
react and result in a risk of injury to
persons.
k. WARNING – Remove nger from
the trigger when not driving fasteners. Never carry the tool with
nger on trigger, the tool is able to re
a fastener.
Tool use and care
a. 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 can lead to
loss of control.
b. 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.
f. Maintain the tool with care. A prop-
erly maintained tool reduces the risk
of binding and is easier to control.
g. 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.
h. 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.
i. Use only those fasteners listed
in the Specications chart of this
manual. Fasteners not identied for
use with this tool by the tool manufacturer are able to result in a risk
of injury to persons or tool damage
when used in this tool.
c. 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 not be used until repaired.
d. Disconnect the tool from the air
source before making adjustments, doing tool maintenance,
clearing jams, touching the safety
nosepiece, leaving work area,
loading, or unloading the tool.
Such precautionary measures reduce
the risk of injury to persons.
SKU 66995 For technical questions, please call 1-800-444-3353. Page 4
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.
Service
Page 5
Air source
a. Never connect to an air
source that is capable of
exceeding 90 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.
SPECIFIC SAFETY
INSTRUCTIONS
4. Always assume the tool contains
fasteners.
5. Do not point the tool toward yourself
or anyone whether it contains fasteners or not.
6. Do not actuate the tool unless the
tool is placed rmly against the workpiece.
7. Respect the tool as a working implement.
8. No horseplay. This tool is not a toy
and can be deadly if misused.
9. Do not load the tool with fasteners
when any one of the operating controls, such as the Trigger or Safety
Nosepiece, is activated.
10. Do not remove, tamper with, or otherwise cause the tool operating controls
to become inoperable.
11. Do not operate the tool if any portion
of the tool operating controls is inoperable, disconnected, altered, or not
working properly.
12. Disconnect the tool from the air supply when:
1. Operators and others in work area
MUST wear ANSI-approved safety
goggles with side shields during
use. The employer is responsible to
enforce the use of eye protection by
the operator and others in the work
area.
2. Keep ngers away from trigger
when not driving fasteners to
avoid accidental ring.
3. Choice of triggering method is im-
portant. Check manual for triggering options.
SKU 66995 For technical questions, please call 1-800-444-3353. Page 5
a. Unattended.
b. Performing any maintenance or
repair.
c. Clearing a jam.
d. Moving the tool to a new location.
13. Do not make any modications to this
tool.
14. Refer to the tool maintenance instructions for detailed information on the
proper maintenance of the tool.
15. Fire fasteners into an appropriate
work surface only. Do not attempt to
Page 6
re fasteners into surfaces too hard
to penetrate. Do not drive fasteners
on top of other fasteners, or at too
steep of an angle. Fasteners can
ricochet causing personal injury.
16. Do not re fasteners too close to the
edge of a workpiece. They may split
the workpiece and y free, causing
personal injury.
17. Keep clear of the workpiece near the
area being fastened. Fasteners may
bend sideways during ring, causing them to exit the workpiece at an
unexpected point, causing personal
injury.
18. Transport Tool safely. Always disconnect air supply when moving the
tool. Carry the tool by the handle and
avoid contact with the trigger.
19. Hold tool away from head and body.
During operation the Tool may kick
back causing injury.
20. Do not re fasteners into a workpiece
that has people, utility lines, or other
objects behind or inside it.
21. Keep balance while using this tool.
Keep area below clear if working in
an elevated location, and secure air
hose to prevent falls from bystanders
accidentally pulling on it.
22. Obey the manual for the air compressor used to power this tool.
23. Install an in-line shutoff valve to allow
immediate control over the air supply
in an emergency, even if a hose is
ruptured.
24. Do not engrave or stamp anything
into the housing to prevent weakening of the housing.
25. 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
particles. (California Health & Safety
Code § 25249.5, et seq.)
26. 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.)
27. 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.
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,
SKU 66995 For technical questions, please call 1-800-444-3353. Page 6
Page 7
arms and shoulders. To reduce the risk of
vibration-related injury:
FUNCTIONAL DESCRIPTION
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 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.
3. Wear suitable gloves to reduce the
vibration effects on the user.
Specications
Max. Air Pressure 90 PSI
Air Inlet 1/4” -18 NPT
Fasteners 3/8” - 2” Brad Nails
Capacity 100 Fasteners
Air Consumption 18 SCFM @ 90 PSI
Air Hose 3/8”
Safety Single Sequential
Components and Controls
Trigger
Safety
Air Inlet
Magazine
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.
Safety Nosepiece - Also called the work-
piece contact, the Safety Nosepiece
helps prevent the tool from ring unless it is pressed against an object.
The Nailer also comes with two ad-
justing wrenches (3 and 4 mm) and a
bottle of lubricating oil.
INITIAL TOOL SET UP/
7. To reduce vibration, maintain tool as
explained in this manual. If abnormal
vibration occurs, stop immediately.
Read the ENTIRE IMPORTANT
SAVE THESE
INSTRUCTIONS.
SKU 66995 For technical questions, please call 1-800-444-3353. Page 7
ASSEMBLY
SAFETY INFORMATION
section at the beginning of this
manual including all text under
subheadings therein before set
up or use of this product.
Page 8
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
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.
1. Incorporate a lter, regulator with
pressure gauge, oiler, 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: If an automatic oiler system is not
used, add a few drops of Pneumatic
Tool Oil into the airline connection before operation. Add a few more drops
after each hour of continual use.
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.
Coupler
Plug
Tool
Quick
Coupler
Valve FilterOiler
Quick
Coupler
Regulator with
Pressure Gauge
Recommended Air Line Components
Coupler
Plug
Air Hose
on Reel
Air
Compressor
2. 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 efcient, 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
operate accidentally after the air
supply is disconnected.
Note: Air ow, and therefore tool perfor-
mance, can be hindered by undersized air supply components.
3. The air hose must be long enough
to reach the work area with enough
extra length to allow free movement
while working.
4. Release the Trigger.
5. Close the in-line safety valve between the compressor and the tool.
SKU 66995 For technical questions, please call 1-800-444-3353. Page 8
Page 9
6. Turn on the air compressor according
to the manufacturer’s directions and
allow it to build up pressure until it
cycles off.
7. 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.
8. The air pressure setting must not exceed job site regulations/restrictions
or exceed max. 90 PSI.
9. Inspect the air connections for leaks.
Repair any leaks found.
10. If the tool will not be used at this
time, turn off and detach the air supply, safely discharge any residual air
pressure, and release the trigger 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.
Inspect tool before use, looking
for damaged, loose, and
missing parts. If any problems
are found, do not use tool until
repaired.
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 injury and distraction.
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. Secure loose workpieces using a vise
or clamps (not included) to prevent
movement while working.
4. There must not be hazardous objects (such as utility lines or foreign
objects) nearby that will present a
hazard while working.
Single Sequential Safety Trip
Mechanism Denition
This tool has a single sequential safe-
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.
SKU 66995 For technical questions, please call 1-800-444-3353. Page 9
ty trip mechanism, which is designed to
prevent inadvertent ring. The tool should
only re if the Safety Nosepiece is pressed
against the workpiece prior to pulling the
Trigger. It should only re again if the trigger is released rst. The Tool should not
re if the Safety Nosepiece is not pressed
against the workpiece.
Page 10
Single Sequential Safety Trip
Mechanism Testing Procedure
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
Empty the tool before this
procedure. Point the tool at a
piece of scrap wood when
testing.
1. Disconnect tool from the air supply.
2. Empty the magazine of fasteners.
3. Check that Trigger and Safety Nosepiece move freely, without sticking.
4. Connect the air supply to the tool and
set within the Operating Air Pressure
indicated on the Specication chart.
5. Test tool by pressing Safety Nosepiece against the workpiece without
pulling Trigger. The tool must not
cycle (re). If it cycles (res), stop
immediately and take the tool to a
qualied service technician for repair.
6. Hold the tool away, or off of the workpiece. The Safety Nosepiece should
return to its original position. Squeeze
the Trigger. The tool must not cycle
(re). If it cycles (res), stop immediately and take the tool to a qualied
service technician.
7. Press the Safety Nosepiece against
the workpiece and squeeze the
Trigger. The tool must cycle (re)
only once. Release the trigger and
squeeze it again. The tool must cy-
cle (re) again only once. With the
Trigger held, carefully lift the tool and
press it against the workpiece again.
The tool must not cycle (re). If it
fails to act in the manner explained in
bold, have it repaired by a qualied
service technician.
Loading/Unloading Nailer
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION, BEFORE
LOADING:
• Wear ANSI-approved safety
goggles with side shields.
Other people in the work area
must also wear ANSI-approved
impact safety goggles with side
shields.
• Release the trigger.
• Detach the air supply.
• Attempt to re the Tool into
a piece of scrap wood to
ensure that it is disconnected
and is incapable of ring any
fasteners.
1. To load nails, hold Nailer with Safety
(45) pointing downward and push up
to release Latch (57) on Magazine
(50).
2. Pull back on Magazine slide out Side
Cover (56).
3. Insert stick of 3/8” - 2” Brad Nails into
front part of Magazine.
4. Please note: Make sure pointed
ends of fasteners are resting on bottom ledge when loading.
5. Slide the Side Cover forward and into
Magazine until Latch catches.
6. To unload nails, follow the above
instructions, making sure to rst
disconnect the air supply before
unloading nails.
SKU 66995 For technical questions, please call 1-800-444-3353. Page 10
Page 11
General Operating Instructions
1. Before use, orient the Exhaust Cover
(1) so that the vent faces away from
your face during use. The Exhaust
Cover can be rotated a full 360° until
desired position is found.
2. Once air connection has been set
up and nails loaded, test the Tool, as
directed in the prior section, before
each use.
3. If an automatic oiler is not used, add
a few drops of Pneumatic Tool Oil
(available from the include oil bottle)
to the airline connection before use.
Add a few drops more after each
hour of continual use.
4. Orient the Nailer correctly so that the
Safety is perpendicular to the workpiece before attempting to drive the
fastener.
5. Press Safety against work surface
and squeeze the Trigger (35) to re
Nailer.
6. If tool requires more force to
accomplish task, verify that tool
receives sufcient, unobstructed
airow (CFM) and increase pressure
(PSI) output of regulator up to
maximum air pressure rating of tool.
7. 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 sufcient
force at maximum pressure and
sufcient airow, then a larger tool
may be required.
clockwise into the locked position, detach the air supply, safely discharge
any residual air pressure in the tool,
and release the trigger after use.
Clean external surfaces with clean,
dry cloth. Then store the tool indoors
out of children’s reach.
USER-MAINTENANCE
INSTRUCTIONS
Procedures not specically
explained in this manual
must be performed only by a
qualied technician.
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION, BEFORE ANY
MAINTENANCE OR REPAIRS
ARE DONE (including clearing
jams):
• Wear ANSI-approved safety
goggles with side shields.
Other people in the work area
must also wear ANSI-approved
impact safety goggles with side
shields.
• Release the trigger.
• Detach the air supply.
• Attempt to re the Tool into
a piece of scrap wood to
ensure that it is disconnected
and is incapable of ring any
fasteners.
• Empty the magazine and leave
it open during service. The
Magazine is spring-loaded
and may cause parts or a
fastener to y out of the Tool.
8. To prevent accidents, release the
Trigger, turn the Trigger Lock counter-
SKU 66995 For technical questions, please call 1-800-444-3353. Page 11
Page 12
TO PREVENT SERIOUS
INJURY FROM TOOL
FAILURE: Do not use
damaged equipment. If
abnormal noise, vibration, or
leaking air is detected, correct
problem before further use.
TO PREVENT EXPLOSION:
Lubricate only with specied
lubricants. Lubricate the air
inlet using only pneumatic
tool oil. Lubricate the internal
mechanism using only white
lithium grease. Other
lubricants may damage
mechanism and may be highly
ammable, causing an
explosion.
Cleaning, Maintenance, and
Lubrication
Note: These procedures are in addition to
the regular checks and maintenance
explained as part of the regular operation of the air-operated tool.
1. Daily - Air Supply Maintenance:
Every day, perform maintenance on
the air supply according to the component manufacturers’ instructions.
The lubricator’s oil level needs to be
maintained and the moisture lter
must be regularly drained. Performing routine maintenance on the air
supply will allow the tool to operate
more safely and will also reduce wear
on the tool.
Clearing Jams
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION, BEFORE ANY
MAINTENANCE OR REPAIRS
ARE DONE (including clearing
jams):
• Wear ANSI-approved safety
goggles with side shields.
Other people in the work area
must also wear ANSI-approved
impact safety goggles with side
shields.
• Release the trigger.
• Detach the air supply.
• Attempt to re the Tool into
a piece of scrap wood to
ensure that it is disconnected
and is incapable of ring any
fasteners.
• Empty the magazine and leave
it open during service. The
Magazine is spring-loaded
and may cause parts or a
fastener to y out of the Tool.
1. If a fastener is jammed in the discharge area, remove it with pliers.
2. If a fastener is jammed in the magazine, pull the Pusher all the way
back to the engaged position. Use a
screwdriver to release the jammed
fastener by probing the openings in
the magazine.
3. WARNING! The Pusher’s spring is
wrapped around, but not attached
to, a roller. If the spring is extended
beyond its length, the end will come
off the roller and the spring will roll up
with a snap, possibly pinching your
nger.
SKU 66995 For technical questions, please call 1-800-444-3353. Page 12
Page 13
4. Pull out the jammed fastener and the
remainder of the fastener strip that is
still in the magazine. Dispose of the
remaining fastener strip; it may be
bent or damaged in some other way.
5. If you are unable to clear the fastener
jam using the method prescribed
above, the tool should be taken to a
qualied service technician for proper
servicing.
Troubleshooting
Problem Possible Causes Likely Solutions
Insufcient
fastener depth.
Fasteners drive
too deeply.
Tool cycles
without ring
fastener.
Frequent
jamming.
Severe air
leakage.
1. Not enough air pressure.
2. Incorrect lubrication or not
enough lubrication.
3. Blocked air inlet screen (if
equipped).
4. Mechanism contaminated.
1. Too much air pressure. 1. Reduce air supply pressure (PSI).
1. Jammed fastener.
2. Tool empty.
3. Incorrect fasteners used.
4. Magazine dirty or not
lubricated properly.
5. Insufcient air ow.
Incorrect fastener type. Conrm fastener diameter, type, length, angle,
1. Cross-threaded housing
components.
2. Loose housing.
3. Damaged valve or housing.
4. Dirty, worn or damaged valve.
1. Check for loose connections and make
sure that air supply is providing enough air
pressure (PSI) to the tool’s air inlet. Do not
exceed maximum air pressure.
2. Lubricate using air tool oil and grease
according to directions.
3. Clean air inlet screen of buildup.
4. Have qualied technician clean and lubricate
mechanism. Install in-line lter in air supply
as stated in Initial Set Up: Air Supply.
1. Clear jammed fastener according to Clearing
Jams instructions.
2. Fill with correct fasteners.
3. Empty, then ll with correct fasteners.
4. Clean and lubricate magazine and pusher.
5. Check for loose connections and make
sure that air supply is providing enough air
ow (CFM) and pressure (PSI) to the tool’s
air inlet. Do not exceed maximum air
pressure.
and collation type. Correct as needed.
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
tighten properly, internal parts may be
misaligned.
3. Replace damaged components.
4. Clean or replace valve assembly.
Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect air supply before service.
SKU 66995 For technical questions, please call 1-800-444-3353. Page 13
Page 14
PARTS LIST
Part Description Q’ty
1 Exhaust Cover 1
2 Hex Bolt 4
3 Cylinder Cap Unit 1
4 Seal 1
5 Seal 1
6 O-Ring 1
7 Compression Spring 1
8 Gasket 1
9 O-Ring 1
10 Head Valve Piston 1
11 O-Ring 1
12 O-Ring 1
13 O-Ring 1
14 Collar 1
15 O-Ring 1
16 Driver 1
17 Fixed Ring 1
18 O-Ring 1
19 Lining Ring 1
20 O-Ring 1
21 Cylinder 1
22 O-Ring 1
23 Bumper 1
24 Housing 1
25 Nozzle 1
26 Seal 1
27 Trigger Valve Head 1
28 Trigger Valve Plunger 1
29 O-Ring 1
30 O-Ring 1
31 Trigger Valve Body 1
32 Spring 1
33 Trigger Plate 1
34 O-Ring 1
35 Trigger 1
36 Pin 1
Part Description Q’ty
37 Spring Pin 1
38 Guide 1
39 Spring Pin 2
40 Hex Bolt 1
41 Stopper 1
42 Spring 1
43 Safety Cover 1
44 Hex Bolt 4
45 Safety 1
46 Spacer 1
47 Driver Guide Cover 1
48 Hex Bolt 2
49 Driver Guide 1
50 Magazine 1
51 Steel Bar 1
52 Pusher Unit 1
53 Spring Holder 2
54 O-Ring 2
55 Pin 1
56 Side Cover 1
57 Latch 1
58 Spring 1
59 Tail Cover 1
60 Hex Bolt 1
61 Hex Bolt 1
62 Spring Pin 1
63 Nut 1
64 Hex Bolt 1
65 Hex Bolt 1
66 Hex Bolt 1
67 Tail Hanger 1
68 Lock Nut 1
69 Hand Grip 1
70 O-Ring 1
71 End Cap 1
72 Air Plug 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.
SKU 66995 For technical questions, please call 1-800-444-3353. Page 14
Page 15
ASSEMBLY DIAGRAM
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 66995 For technical questions, please call 1-800-444-3353. Page 15
Page 16
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 activity, 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 complaint must accompany the merchandise. If our inspection veries the defect, we will either 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 repaired 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 specic 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 • (800) 444-3353
SKU 66995 For technical questions, please call 1-800-444-3353. Page 16
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