Page 1
2-IN-1 FINISH NAILER/STAPLER
Model
66902
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© 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.
Revised Manual 09l
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.
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.
CAUTION, used
with the safety
alert symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate injury.
INSTRUCTIONS
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
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. Cluttered benches and dark
areas increase the risks of electric
shock, re, and injury to persons.
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
SKU 66902 For technical questions, please call 1-800-444-3353. Page 2
Page 3
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.
Dress properly. Do not wear loose b.
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.
g. Always wear hearing
protection when using
the tool. Prolonged expo-
sure to high intensity noise
is able to cause hearing loss.
Do not attach the hose or tool to h.
your body. Attach the hose to the
structure to reduce the risk of loss of
balance if the hose shifts.
Always assume that the tool con-i.
tains fasteners. Do not point the tool
toward yourself or anyone whether it
contains fasteners or not.
WARNING – Do not re fastener on j.
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.
Avoid unintentional starting. Be c.
sure the Trigger (42) is off 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 on.
Do not overreach. Keep proper d.
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.
WARNING – Remove nger from k.
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
Use clamps or another practical a.
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.
Do not force the tool. b. 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.
Do not use the tool if the Trigger c.
does not turn the tool on or off.
Any tool that cannot be controlled
SKU 66902 For technical questions, please call 1-800-444-3353. Page 3
Page 4
with the trigger is dangerous and
must be repaired.
Disconnect the tool from the air d.
source before making adjustments, doing tool maintenance,
clearing jams, touching the safety,
leaving work area, loading, or unloading the tool. Such precautionary
measures reduce the risk of injury to
persons.
Store the tool when it is idle out of e.
reach of children and other untrained persons. A tool is dangerous
in the hands of untrained users.
Maintain the tool with care. f. A prop-
erly maintained tool is more efcient
and reduces the risk of binding and is
easier to control.
Check for misalignment or bind-g.
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.
Use only accessories that are h.
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.
Use only those fasteners listed i.
in the Accessories section 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.
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.
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.
Never use oxygen, carbon dioxide, b.
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.
SKU 66902 For technical questions, please call 1-800-444-3353. Page 4
Page 5
SYMBOLS AND
SPECIFIC SAFETY
Keep ngers away from Trigger 2.
when not driving fasteners to
avoid accidental ring.
INSTRUCTIONS
Symbol Denitions
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
eye protection.
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 NIOSH-
approved dust mask/respirator.
Always assume the tool contains 3.
fasteners.
Do not point the tool toward yourself 4.
or anyone whether it contains fasteners or not.
Do not actuate the tool unless the 5.
tool is placed rmly against the workpiece.
Respect tool as a working implement.6.
No horseplay. This tool is not a toy 7.
and can be deadly if misused.
Do not load the tool with fasteners 8.
when any one of the operating controls is activated.
Do not remove, tamper with, or other-9.
wise cause the tool operating controls
to become inoperable.
Do not operate the tool if any portion 10.
of the tool operating controls is inoperable, disconnected, altered, or not
working properly.
Disconnect the tool from the power 11.
source when:
WARNING marking concerning Risk
of Explosion.
Unattended.a.
Performing any maintenance or b.
repair.
Specic Safety Instructions
Operators and others in work area 1.
MUST wear ANSI-approved safety
goggles with side shields during
use. The employer is responsible to
Clearing a jam.c.
Moving the tool to a new location.d.
The written approval of the tool man-12.
ufacturer must be obtained prior to
making any modications to the tool.
enforce use of eye protection by the
operator and others in the work area.
Refer to the tool maintenance instruc-13.
tions for detailed information on the
proper maintenance of the tool.
SKU 66902 For technical questions, please call 1-800-444-3353. Page 5
Page 6
Fire fasteners into an appropriate 14.
work surface only. Do not attempt to
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.
Do not re fasteners too close to the 15.
edge of a workpiece. They may split
the workpiece and y free, causing
personal injury.
Transport Tool safely. Always dis-16.
connect air supply when moving the
tool. Carry the tool by the handle and
avoid contact with the trigger.
Hold tool away from head and body. 17.
During operation the Tool may kick
back causing injury.
Do not re fasteners into a workpiece 18.
that has people, utility lines, or other
objects behind or inside it.
Keep balance while using this tool. 19.
Keep area below clear if working in a
high location, and secure air hose to
prevent falls from bystanders accidentally pulling on it.
Obey the manual for the air compres-20.
sor used to power this tool.
Install in-line shutoff valve to allow im-21.
mediate control over air supply in an
emergency, even if hose is ruptured.
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 24.
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.)
The warnings and precautions dis-25.
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.
Vibration Precautions
Do not engrave or stamp anything 22.
into the housing to prevent weakening of the housing.
WARNING: Some dust created by 23.
power sanding, sawing, grinding, drilling, and other construction activities,
contains chemicals known [to the
State of California] to cause cancer,
SKU 66902 For technical questions, please call 1-800-444-3353. Page 6
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:
Anyone using vibrating tools regu-1.
larly or for an extended period should
Page 7
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.
FUNCTIONAL DESCRIPTION
Specications
Air Pressure
Range
Maximum Air
Pressure
Air Inlet 1/4” -18 NPT
Average Air
Consumption
Fastener
Capacity
75-90 PSI
90 PSI
6-8 SCFM
100 Nails/Staples:
T-Head 16-Gauge Brad Nails, 3/4” 2” L; 1/4” 18-Gauge Crown Narrow
Gauge Staples, 1/2” - 1-1/2” L
Do not smoke during use. Nico-2.
tine reduces the blood supply to the
hands and ngers, increasing the risk
of vibration-related injury.
Wear suitable gloves to reduce the 3.
vibration effects on the user.
Use tools with the lowest vibration 4.
when there is a choice between different processes.
Include vibration-free periods each 5.
day of work.
Grip tool as lightly as possible (while 6.
still keeping safe control of it). Let
the tool do the work.
To reduce vibration, maintain tool as 7.
explained in this manual. If abnormal
vibration occurs, stop immediately.
Components and Controls
Trigger
Safety
Safety - Also called the workpiece contact,
the safety helps prevent the tool from ring
unless it is pressed against an object.
Air Inlet
Magazine
SAVE THESE
INSTRUCTIONS.
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.
SKU 66902 For technical questions, please call 1-800-444-3353. Page 7
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 item is
intact and undamaged. If any parts are
missing or broken, call Harbor Freight
Tools at 1-800-444-3353.
the diagram above. An in-line shut-
off valve is an important safety
device because it controls the air
supply even if the air hose is ruptured.
Note: If an automatic oiler system is not
used, add a few drops of Pneumatic
Tool Oil to the airline connection before operation. Add a few more drops
after each hour of continual use.
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 tool.
Do not use oxygen, carbon
dioxide, combustible gases,
or any other bottled gas as a
power source for this tool.
Attach an air hose to the compres-2.
sor’s air outlet. Connect the air hose
to the air inlet of the tool. Other
components, such as a connector,
air hose 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.
The air hose must be long enough 3.
to reach the work area with enough
extra length to allow free movement
while working.
Release the tool’s trigger.4.
Close the in-line safety valve be-5.
tween the compressor and the tool.
Turn on the air compressor according 6.
1. Incorporate an in-line oiler, shut-off
valve, regulator with pressure gauge,
and lter for best service, as shown in
SKU 66902 For technical questions, please call 1-800-444-3353. Page 8
to the manufacturer’s directions and
allow it to build up pressure until it
cycles off.
Page 9
Adjust the air compressor’s output 7.
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.
The air pressure setting must not ex-8.
ceed job site regulations/restrictions.
The air pressure setting must not
exceed 90 PSI when being used with
work pieces that have a thickness of
less than 1-3/4”.
Inspect the air connections for leaks. 9.
Repair any leaks found.
are found, do not use tool until
repaired.
Work Piece and Work Area Set Up
Designate a work area that is clean 1.
and well-lit. The work area must not
allow access by children or pets to
prevent injury and distraction.
Route the air hose along a safe route 2.
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.
If the tool will not be used at this 10.
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.
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.
Secure loose workpieces using 3.
clamps (not included) to prevent
movement while working.
There must not be hazardous ob-4.
jects (such as utility lines or foreign
objects) nearby that will present a
hazard while working.
Full Sequential Safety Trip
Mechanism Denition
This tool has a full sequential safety
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 both
Trigger and Safety Nosepiece are re-
leased rst. The Tool should not re if the
Safety Nosepiece is not pressed against
the workpiece.
Inspect tool before use, looking
for damaged, loose, and
missing parts. If any problems
Rev 09d
SKU 66902 For technical questions, please call 1-800-444-3353. Page 9
Page 10
Full 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.
Disconnect1. the tool from the air supply.
Empty the Magazine of fasteners.2.
Check that the Trigger and the Safety 3.
Nosepiece move freely, without sticking.
Connect the air supply to the tool and 4.
set within the Operating Air Pressure
indicated on the Specication chart.
Test the tool by pressing the Safety 5.
Nosepiece against the workpiece
without pulling the Trigger. The Tool
must not cycle (re). If it cycles
(res), stop immediately and have it
repaired by a qualied service techni-
cian.
Hold the tool away or off of the work-6.
piece. The Safety Nosepiece should
return to its original position. Squeeze
the Trigger. The tool must not cycle
(re). If the tool res, stop immedi-
ately and have it repaired by a quali-
ed service technician.
Press the Safety Nosepiece against 7.
the workpiece and squeeze the
Trigger. The tool must cycle (re)
only once. Release the Trigger and
squeeze it again. The tool must
not cycle (re). With the Trigger
SKU 66902 For technical questions, please call 1-800-444-3353. Page 10
held, carefully lift the tool and press
it against the workpiece again. The
tool must not cycle (re). If it fails
to perform in the manner explained in
bold, have it repaired by a qualied
service technician.
Loading the Tool
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.
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.
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
Release the trigger, detach the
air supply, and safely
discharge any residual air
pressure in the tool before
loading. Keep the Tool
pointed away from yourself
and others at all times. Do
not load fasteners with the
Trigger or Safety depressed.
Depress the Click Lever (74) to 1.
release the spring-loaded Magazine
(67) from the Magazine Cover (61).
Slide the Magazine out.2.
Rev 09d
Page 11
Insert the required size Fasteners 3.
(3/4” - 2” L 16-gauge Brad Nails or
1/2” - 1-1/2” L18-gauge Crown Narrow Staples) into the Magazine.
Slide the Magazine back into place 4.
until it clicks.
General Operating Instructions
Before each use, test the Tool, as 1.
directed in the prior section.
If an automatic oiler is not used, 2. add
a few drops of Pneumatic Tool Oil
to the airline connection before use.
Add a few drops more after each
hour of continual use.
Grip the Body (24) of the Nailer with 3.
both hands and press the nose piece
against the surface you wish to fas-
ten. Be sure to keep hands, ngers
and other body parts away from
Nozzle.
Push the nose piece on a scrap 4.
material, preferably the same thickness and type of material as the
workpiece. Press the Trigger (42) to
activate the Nailer. Performing this
test-ring will help you to set the correct air pressure (not exceeding 90
PSI) to properly drive the fastener.
Grip the Body (24) of the Nailer with 5.
both hands and press the Nozzle
against the surface you wish to fas-
ten. Be sure to keep hands, ngers
and other body parts away from the
Nozzle.
Press the Trigger (42) to activate the 6.
Nailer.
To avoid indenting or marring when 7.
working on the face of ne surfaces,
use the supplied Plastic Cap (86) on
the Safety.
If the tool requires more force to 8.
accomplish the task, verify that the
tool receives sufcient, unobstructed
airow (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 sufcient
force at maximum pressure and
sufcient airow, then a larger tool
may be required.
To prevent accidents, turn off the 9.
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 clean, dry cloth, and apply
a thin coat of tool oil. 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):
Rev 09d, 09l
SKU 66902 For technical questions, please call 1-800-444-3353. Page 11
Page 12
• Wear ANSI-approved safety
goggles with side shields.
Other people in the work area
must also wear ANSI-approved
impact safety goggles.
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.
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.
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 the
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.
Daily - Air Supply Maintenance: 1.
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.
Release the trigger.•
Detach the air supply.•
Attempt to re Tool into piece •
of scrap wood to ensure
that it is disconnected and
incapable of ring 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.
If a fastener is jammed in the dis-1.
charge area, remove it with pliers.
If a fastener is jammed in the maga-2.
zine, pull the Pusher all the way
SKU 66902 For technical questions, please call 1-800-444-3353. Page 12
Page 13
back to the engaged position. Use a
screwdriver to release the jammed
remaining fastener strip; it may be
bent or damaged in some other way.
fastener by probing the openings in
the magazine.
If unable to clear jam using the meth-4.
od prescribed above, the tool should
Pull out the jammed fastener and the 3.
remainder of the fastener strip that is
be repaired by a qualied service
technician.
still in the magazine. Dispose of the
Troubleshooting
Problem Possible Causes Likely Solutions
Insufcient
fastener depth.
Fasteners drive
too deeply.
Tool cycles
without ring
fastener.
Frequent
jamming.
Severe air
leakage.
(Slight air leakage
is normal,
especially on
older tools.)
Incorrect tool depth setting.1.
Not enough air pressure. 2.
Incorrect lubrication or not 3.
enough lubrication.
Blocked air inlet screen (if 4.
equipped).
Mechanism contaminated. 5.
Incorrect tool depth setting.1.
Too much air pressure.2.
Tool empty.1.
Incorrect fastener used.2.
Magazine dirty or not 3.
lubricated properly.
Insufcient air ow.4.
Incorrect fastener type. Conrm fastener diameter, type, length, angle,
Cross-threaded housing 1.
components.
Loose housing. 2.
Damaged valve or housing.3.
Dirty, worn or damaged valve. 4.
Adjust depth setting, if available.1.
Check for loose connections and make 2.
sure that air supply is providing enough air
pressure (PSI) to the tool’s air inlet. Do not
exceed maximum air pressure.
Lubricate using air tool oil and grease 3.
according to directions.
Clean air inlet screen of buildup. 4.
Have qualied technician clean and lubricate 5.
mechanism. Install in-line lter in air supply
as stated in Initial Set Up: Air Supply.
Adjust depth setting, if available.1.
Reduce air supply pressure (PSI).2.
Fill with correct fastener.1.
Empty, then ll with correct fastener.2.
Clean and lubricate magazine and pusher. 3.
Check for loose connections and make 4.
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.
Check for incorrect alignment and uneven 1.
gaps. If cross-threaded, disassemble and
replace damaged parts before use.
Tighten housing assembly. If housing cannot 2.
tighten properly, internal parts may be
misaligned.
Replace damaged components.3.
Clean or replace valve assembly.4.
Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect air supply before service.
SKU 66902 For technical questions, please call 1-800-444-3353. Page 13
Page 14
PARTS LIST
Part Description Q’ty
1 Shoulder Screw 1
2 Exhaust Deector 1
3 O-Ring 1
4 Spring Washer 4
5 Hex Bolt 4
6 Head Cap 1
7 O-Ring 1
8 Gasket 1
10 Seal 1
11 Spring 1
12 Head Valve Piston 1
13 O-Ring 1
14 O-Ring 1
15 O-Ring 1
16 Collar 1
17 O-Ring 1
18 O-Ring 1
19 Driver Unit 1
20 O-Ring 1
21 Cylinder 1
22 O-Ring 1
23 Bumper 1
24 Body 1
25 Nozzle 1
26 Seal 1
27 Upper Trigger Valve 1
28 O-Ring 1
29 O-Ring 1
30 Trigger Valve Piston 1
31 O-Ring 1
32 O-Ring 1
33 Spring 1
34 Trigger Plunger 1
35 O-Ring 2
36 O-Ring 1
37 Lower Trigger Valve 1
38 Pin 1
39 Spring 1
40 Trigger Plate 1
41 O-Ring 1
42 Trigger 1
43 Retainer Pin 1
44 Safety Guide 1
45 Pin 1
Part Description Q’ty
46 Spring Washer 2
47 Head Screw 2
48 Head Cover 1
49 Hex Bolt 3
50 Safety 1
51 Depth Adjusting Knob 1
52 Adjusting Guide 1
53 E-Ring 1
54 Spring 1
55 Spacer A 1
56 Hex Bolt 2
57 Driver Guide Cover 1
58 Driver Guide 1
59 Hex Bolt 1
60 Spacer B 1
61 Magazine Cover 1
62 Steel Bar 1
63 Pusher Unit 1
64 Spring Holder 2
65 O-Ring 1
66 Spring 2
67 Magazine 1
68 Hex Bolt 2
69 Nail Positioner 1
70 Tail Hanger 1
71 Nut 1
72 Hex Bolt 1
73 Retainer Pin 1
74 Click Lever 1
75 Spring 1
76 O-Ring 1
77 Hex Bolt 1
78 Cylinder Pin 1
79 Tail Cover 1
80 Nut 2
81 Rubber Grip 1
82 Packing 1
83 End Cap 1
84 Hex Bolt 3
85 Air Plug 1
86 Plastic Cap 1
87 Nut 1
88 Hex Bolt 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 66902 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 66902 For technical questions, please call 1-800-444-3353. Page 15
Page 16
LIMITED 1 YEAR 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 one year from the
date of purchase (90 days if used by a professional contractor or if used as rental equipment). This warranty does not apply to damage due directly or indirectly, to misuse,
abuse, negligence or accidents, repairs or alterations outside our facilities, 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 66902 For technical questions, please call 1-800-444-3353. Page 16
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