Harbor Freight Tools 69928, 69927 Product manual

Table of Contents

Safety ......................................................... 2

Specifications ............................................. 7

Setup .......................................................... 8

SAFETY OPERATION MAINTENANCESETUP

Operation ................................................... 11

This is the safety alert symbol. It is used to alert you to potential personal injury hazards.

Maintenance .............................................. 14

Parts List and Diagram .............................. 18

Warranty .................................................... 20

WARNING SYMBOLS AND DEFINITIONS

Obey all safety messages that follow this symbol to avoid possible injury or death.

Indicates a hazardous situation which, if not avoided,

will result in death or serious injury.

Indicates a hazardous situation which, if not avoided,

Indicates a hazardous situation which, if not avoided,

Symbol Property or statement

PSI

CFM

SCFM

NPT

NPS

Pounds per square inch of pressure

Cubic Feet per Minute flow

Cubic Feet per Minute flow
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.

could result in death or serious injury.

could result in minor or moderate injury.

Addresses practices not related to personal injury.

Symbol Property or statement

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.

WARNING marking concerning
Risk of Explosion.

Table A: Symbol Definitions

Page 2 For technical questions, please call 1-800-444-3353. Item 69927

69928

IMPORTANT SAFETY INSTRUCTIONS

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

To reduce the risks of electric shock, fire, and injury to persons,
read all the instructions before using the tool.

Work area

SAFETYOPERATIONMAINTENANCE SETUP

a. Keep the work area clean and well lighted.

Cluttered benches and dark areas increase the
risks of electric shock, fire, and injury to persons.

b. Do not operate the tool in explosive atmospheres,

such as in the presence of flammable liquids,
gases, or dust. The tool is able to create sparks

resulting in the ignition of the dust or fumes.

Personal safety

a. Stay alert. Watch what you are doing and

use common sense when operating the tool.
Do not use the tool while tired or under the
influence 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

trigger is released 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 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.

c. Keep bystanders, children, and visitors away

while operating the tool. Distractions are able
to result in the loss of control of the tool.

f. Always wear eye protection.

Wear ANSI-approved safety goggles
with side shields.

g. Always wear hearing protection when

using the tool. Prolonged exposure 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.

i. Always assume that the tool contains fasteners.

Do not point the tool toward yourself or anyone
whether it contains fasteners or not.

j. WARNING – Do not fire fastener on top of another

fastener. This is able to cause the fastener to be
deflected and hit someone, or cause the tool to
react and result in a risk of injury to persons.

k. WARNING – Remove finger from the trigger when

not driving fasteners. Never carry the tool with
finger on trigger, the tool is able to fire a fastener.

69928

Page 3For technical questions, please call 1-800-444-3353.Item 69927

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

SAFETY OPERATION MAINTENANCESETUP

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.

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.

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.

f. Maintain the tool with care.

A properly maintained tool reduces the risk
of binding and is easier to control.

g. 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.

h. 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.

i. Use only those fasteners listed in the

Specifications chart of this manual.
Fasteners not identified 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

a. Tool service must be performed only

by qualified repair personnel.

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.

SAVE THESE INSTRUCTIONS.

c. Use only the lubricants supplied with the

tool or specified by the manufacturer.

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.

Page 4 For technical questions, please call 1-800-444-3353. Item 69927

69928

Specific Safety Instructions

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 fingers away from trigger when not

driving fasteners to avoid accidental firing.

3. Choice of triggering method is important.

Check manual for triggering options.

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 firmly 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:

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 modifications 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 fire 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 fire fasteners too close to the edge of
a workpiece. They may split the workpiece
and fly free, 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 fire 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 avoid weakening it.

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 filter 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.)

26. 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.

SAFETYOPERATIONMAINTENANCE SETUP

17. Keep clear of the workpiece near the area being
fastened. Fasteners may bend sideways during
firing, causing them to exit the workpiece at an
unexpected point, causing personal injury.

69928

Page 5For technical questions, please call 1-800-444-3353.Item 69927

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.

SAFETY OPERATION MAINTENANCESETUP

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 check-ups 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 fingers),
seek medical advice as soon as possible.

SAVE THESE INSTRUCTIONS.

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 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.

Page 6 For technical questions, please call 1-800-444-3353. Item 69927

69928

Functional Description

Specifications

Model 69927 69928

Maximum Air Pressure 120 PSI 120 PSI

Air Inlet 1/4″ -18 NPT 1/4″ -18 NPT

Air Consumption 3 CFM @ 90 PSI 3 CFM @ 90 PSI

Safety Mechanism Type

Nail Type

Single Sequential or
Contact Trip (switchable)

10 Gauge,

2-3/8″ - 3-1/4″ Long, 21° Angle,

Plastic Collated Full Head

Components and Controls

Exhaust

Mode

Switch

Single Sequential or

SAFETYOPERATIONMAINTENANCE SETUP

Contact Trip (switchable)

10 Gauge,
2-3/8″ - 3-1/4″ Long, 28° Angle,
Paper Collated Clipped Head

Air Inlet

Depth

Adjustment

Screw

Trigger

Pusher

Lock

Magazine

Pusher

Safety

Nosepiece

Safety Nosepiece - Also called the workpiece contact, the Safety Nosepiece helps

prevent the tool from firing unless it is pressed against an object.

69928

Page 7For technical questions, please call 1-800-444-3353.Item 69927

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.

SAFETY OPERATION MAINTENANCESETUP

Note: For additional information regarding the parts listed in the following pages,

refer to the Assembly Diagram near the end of this manual.

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.

1. Incorporate a filter, regulator with pressure gauge,
oiler, in-line shutoff valve, and quick coupler for
best service, as shown on Figure A on page 9
and Figure B on page 10. 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.

Note: This air tool may be shipped with a protective plug
covering the air inlet. Remove this plug before set up.

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 efficient, 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 flow, and therefore tool performance,
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 tool’s trigger and empty its magazine.

5. Close the in-line safety valve between
the compressor and the tool.

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. The air pressure setting
must not exceed 90 PSI when being used with
workpieces that have a thickness of less than 1-3/4″.

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.

Page 8 For technical questions, please call 1-800-444-3353. Item 69927

69928

H

F

C

E

SAFETYOPERATIONMAINTENANCE SETUP

E

A

D

B

Figure A: Portable Air Supply Setup

A

C

G

B

Lubricated

69928

Tools

A

Non-lubricated

Tools

Description Function

A Air Hose Connects air to tool

B Filter Prevents dirt and condensation from damaging tool or workpiece

C Regulator Adjusts air pressure to tool

F Leader Hose (optional) Increases coupler life

E Coupler and Plug Provides quick connection and release

D Lubricator (optional) For air tool lubrication

H Air Adjusting Valve (optional) For fine tuning airflow at tool

G Air Cleaner / Dryer (optional) Prevents water vapor from damaging workpiece

Page 9For technical questions, please call 1-800-444-3353.Item 69927

Non-lubricated Tools

H

F

SAFETY OPERATION MAINTENANCESETUP

F

M

L O

L

Slope

J

Lubricated

Tools

G

Figure B: Stationary Air Supply Setup

H

K

C

E

D

J

N

I

I

C

F

Description Function

C

Page 10 For technical questions, please call 1-800-444-3353. Item 69927

B B

A A

I Filter Prevents dirt and condensation from damaging tool or workpiece

J Regulator Adjusts air pressure to tool

A Vibration Pads For noise and vibration reduction

B Anchor Bolts Secures air compressor in place

C Ball Valve Isolates sections of system for maintenance

F Ball Valve To drain moisture from system

E Main Air Line - 3/4″ minimum recommended Distributes air to branch lines

D Isolation Hose For vibration reduction

H Air Hose Connects air to tool

G Branch Air Line -1/2″ minimum recommended Brings air to point of use

L Coupler and Plug Provides quick connection and release

K Lubricator (optional) For air tool lubrication

69928

N Air Cleaner / Dryer (optional) Prevents water vapor from damaging workpiece

M Leader Hose (optional) Increases coupler life

O Air Adjusting Valve (optional) For fine tuning airflow at tool

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.

Workpiece 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. 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 Definition

The single sequential safety trip mechanism is designed to prevent inadvertent firing. Use the Mode
Switch near the Trigger to change modes. The tool should only fire if the Safety Nosepiece is pressed
against the workpiece prior to pulling the Trigger. It should only fire again if the trigger is released and
squeezed again. The Tool should not fire if the Safety Nosepiece is not pressed against an object.

SAFETYOPERATIONMAINTENANCE SETUP

Single Sequential Safety Trip Mechanism Testing Procedure

TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION:
Point the tool at a piece of scrap wood when testing.

1. Disconnect the tool from the air supply.

2. Load the magazine with fasteners.

3. Check that the Trigger and the Safety Nosepiece
move freely, without sticking.

4. Connect the air supply to the tool and
set within the Operating Air Pressure
indicated on the Specification chart.

5. Test the tool by pressing the Safety Nosepiece
against the workpiece without pulling the Trigger.
The tool must not cycle (fire).
If it cycles (fires), stop immediately and have it
repaired by a qualified service technician.

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 (fire).
If it cycles (fires), stop immediately and take
the tool to a qualified service technician.

7. Press the Safety Nosepiece against the workpiece
and squeeze the Trigger.
The tool must cycle (fire) only once.
Release the trigger, slide the nailer to a fresh piece of
wood, and squeeze it again.
The tool must cycle (fire) again only once.
With the Trigger held, carefully lift the tool and press
it against the workpiece again.
The tool must not cycle (fire).
If it fails to act in the manner explained in bold,
have it repaired by a qualified service technician.

69928

Page 11For technical questions, please call 1-800-444-3353.Item 69927

Contact Safety Trip (Bump Fire) Mechanism Definition

The contact safety trip (or bump fire) mechanism allows rapid fire. Use the Mode Switch near the Trigger
to change modes. The tool should only fire if the Safety Nosepiece is pressed against the workpiece
and the trigger is pulled. It should fire again if the trigger is released and pulled OR if the safety is
lifted and pressed against the workpiece again. The Tool should not fire if the Safety Nosepiece is

SAFETY OPERATION MAINTENANCESETUP

not pressed against an object. Contact safety trip / bump fire should only be enabled and used
by skilled operators who are aware of the hazards and use proper, safe work practices.

Contact Safety Trip (Bump Fire) Mechanism Testing Procedure

TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION:
Point the tool at a piece of scrap wood when testing.

1. Disconnect the tool from the air supply.

2. Load the magazine with fasteners.

3. Check that the Trigger and the Safety Nosepiece
move freely, without sticking.

4. Connect the air supply to the tool and
set within the Operating Air Pressure
indicated on the Specification chart.

5. Test the tool by pressing the Safety Nosepiece
against the workpiece without pulling the Trigger.
The tool must not cycle (fire).
If it cycles (fires), stop immediately and have it
repaired by a qualified service technician.

Safety Trip Mode Switch

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 (fire).
If it cycles (fires), stop immediately and take
the tool to a qualified service technician.

7. Press the Safety Nosepiece against the workpiece
and squeeze the Trigger.
The tool must cycle (fire) only once.
Release the trigger, slide the nailer to a fresh piece of
wood, and squeeze it again.
The tool must cycle (fire) again only once.
With the Trigger depressed, carefully lift the tool
and press it against the workpiece
again in a new location.
The tool must cycle (fire) again only once.
If it fails to act in the manner explained in bold,
have it repaired by a qualified service technician.

TO PREVENT SERIOUS INJURY FROM ACCIDENTAL FIRING:

•Release trigger and point tool in a safe direction before changing safety trip mode.

•ONLY operate the tool with the switch fully in one of the safety trip mode positions.

1. Turn the switch to the (single nail) setting
to enable Single Sequential operation.
This operation is safer and should
be used whenever practical.

2. Turn the switch to the (multiple nail) setting
to enable contact trip / bump fire operation.
This operation is more dangerous.

Only a skilled operator who is aware of the
hazards and uses proper, safe work practices
should use contact trip / bump fire operation.

Single Sequential

Position

Contact Trip

Position

Figure C: Trigger Mode Switch Positions

Page 12 For technical questions, please call 1-800-444-3353. Item 69927

69928

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 with side shields.

•Release the trigger.

•Detach the air supply.

•Attempt to fire the Tool into a piece of scrap wood to ensure that it

is disconnected and is incapable of firing any fasteners.

SAFETYOPERATIONMAINTENANCE SETUP

Note: Make sure nail type and angle are correct for nailer.

1. Pull Pusher all the way to the rear of Magazine
until it is held in place by the Pusher Lock.

General Operating Instructions

1. Before each use, test the tool as
directed in the prior section.

2. If an automatic oiler is not used, 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.

WARNING! TO PREVENT
SERIOUS INJURY: Keep second hand
away from tool discharge area,
especially if holding workpiece.
Tool applies extreme force to fastener,
and fasteners may deflect or fire in an
unexpected direction.

CAUTION! TO PREVENT INJURY: Do not hold tool
near body while firing. Tool recoil can cause injury.

3. Position tool at desired fastener location and depress
the Safety Nosepiece fully against the workpiece.
Squeeze the trigger to fire a fastener.

Note: PREVENT DOUBLE FIRING,
allow the tool to recoil from the workpiece,
do not force it against the workpiece.

4. Firing multiple fasteners
using contact trip (bump fire) mode:
Squeeze and hold trigger, then push safety nosepiece
to fire one fastener, move and push safety nosepiece
again to fire additional fasteners.

5. To change firing depth: Disconnect Air Supply
and keep Safety Nosepiece pointed away.
Loosen the Depth Adjustment Screw,
adjust the Safety Nosepiece, and retighten the
Screw to control the firing depth. See Figure D.

2. Orient a strip of nails with the tips down and
drop the strip of nails into Magazine.

3. Pull Pusher back, release Pusher Lock, and
allow Pusher to slide forward against strip of nails.

Depth

Adjustment

Screw

Safety

Nosepiece

Figure D: Depth Adjustment

6. If, at the maximum depth setting, 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 INJURY FROM TOOL OR
ACCESSORY FAILURE:
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.

Note: The nailer will stop firing when it is empty.

7. After use, to prevent accidents:

a. Release the trigger.

b. Detach the air supply.

c. Change the Mode Switch to setting.

d. Attempt to fire the Tool into a piece of scrap

wood to ensure that it is disconnected
and is incapable of firing any fasteners.

e. Release the trigger again.

f. Clean external surfaces with clean, dry cloth.

g. Store indoors out of children’s reach.

69928

Page 13For technical questions, please call 1-800-444-3353.Item 69927

User-Maintenance Instructions

Procedures not specifically explained in this manual must be performed only by a qualified technician.

SAFETY OPERATION MAINTENANCESETUP

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 fire the Tool into a piece of scrap wood to ensure that it

is disconnected and is incapable of firing any fasteners.

•Empty the magazine and leave it open during service.
The Magazine is spring-loaded and may cause parts or a fastener to fly out of the Tool.

TO PREVENT SERIOUS INJURY FROM TOOL FAILURE:
Do not use damaged equipment.
If abnormal noise, vibration, or leaking air is detected, have the problem corrected before further use.

TO PREVENT EXPLOSION: Lubricate only with specified 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 flammable, causing an explosion.

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. BEFORE EACH USE, inspect the general
condition of the tool. Check for:

• proper safety trip mechanism operation,

• free safety nosepiece and trigger movement,

• loose hardware or housing,

• misalignment or binding of moving parts,

• cracked or broken parts, and

• any other condition that may

affect its safe operation.

2. Daily - Air Supply Maintenance:
Every day, perform maintenance on the air supply
according to the component manufacturers'
instructions. Maintain the lubricator's oil level.
Drain the moisture filter regularly.
Performing routine maintenance on the air
supply will allow the tool to operate more safely
and will also reduce wear on the tool.

Page 14 For technical questions, please call 1-800-444-3353. Item 69927

69928

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 fire the Tool into a piece of scrap wood to ensure that it

is disconnected and is incapable of firing any fasteners.

•Empty the magazine and leave it open during service.
The Magazine is spring-loaded and may cause parts or a fastener to fly out of the Tool.

SAFETYOPERATIONMAINTENANCE SETUP

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. Pull out the jammed fastener and the remainder of
the fastener strip from the magazine.
Dispose of the remaining fastener strip;
it is likely bent or damaged and may cause repeated
jamming or damage to the tool if reused.

4. If the jam cannot be cleared using the method above,
have the tool serviced by a qualified technician.

69928

Page 15For technical questions, please call 1-800-444-3353.Item 69927

Troubleshooting

Problem Possible Causes Likely Solutions

Insufficient
fastener depth.

SAFETY OPERATION MAINTENANCESETUP

Fasteners drive
too deeply.

Tool cycles
without firing
fastener.

Frequent
jamming.

Severe air
leakage.
(Slight air leakage
is normal,
especially on
older tools.)

1. Incorrect tool depth setting.

2. Not enough air pressure.

3. Incorrect lubrication or
not enough lubrication.

4. Blocked air inlet screen
(if equipped).

5. Mechanism contaminated.

1. Incorrect tool depth setting.

2. Too much air pressure.

1. Jammed fastener.

2. Tool empty.

3. Incorrect fasteners used.

4. Magazine dirty or not
lubricated properly.

5. Insufficient air flow.

Incorrect nail type. Confirm nail collation type, diameter, angle,

1. Cross-threaded housing
components.

2. Loose housing.

3. Damaged valve or housing.

4. Dirty, worn or damaged valve.

1. Adjust depth setting, if available.

2. 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.

3. Lubricate using air tool oil and grease
according to directions.

4. Clean air inlet screen of buildup.

5. Have qualified technician clean and lubricate
mechanism. Install in-line filter in air supply
as stated in Initial Set Up: Air Supply.

1. Adjust depth setting, if available.

2. Reduce air supply pressure (PSI).

1. Clear jammed fastener according to
Clearing Jams instructions.

2. Reload with correct fasteners.

3. Empty, then reload 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 flow (CFM)
and pressure (PSI) to the tool’s air inlet.

Do not exceed maximum air pressure.

type, and length. 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.

Page 16 For technical questions, please call 1-800-444-3353. Item 69927

69928

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.

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 available individually as replacement parts.

SAFETYOPERATIONMAINTENANCE SETUP

69928

Page 17For technical questions, please call 1-800-444-3353.Item 69927

Parts List and Diagram

69927 Parts List and Diagram

SAFETY OPERATION MAINTENANCESETUP

Part Description

10 Washer
11 Valve Seat
12 Spring
13 O-ring 57.5×2.6
14 O-ring 72.4×3.5
15 Valve
16 Screw
17 Cylinder Seal
18 Collar
19 O-ring 54.4×4
20 Piston Assembly
21 Cylinder
22 O-ring 67×3
23 O-ring 60.25×2.5
24 Restrictive Plate
25 O-ring 97.5×3.5
26 Bumper A
27 Bumper B
28 Body
29 O-ring 62.3×1.8
30 Nose

1 Screw
2 Spring Washer
3 Bushing
4 Exhaust Cover
5 Seal
6 Screw
7 Spring Washer
8 Cylinder Cap
9 Gasket

Part Description

31 Spring Washer
32 Screw
33 Spring
34 Safety Bracket A
35 Screw
36 Bushing
37 Safety Nosepiece
38 Washer
39 Depth Adjustment Screw
40 Rubber Cover

40a Cover Clip

41 Spring Pin
42 Safe Guide
43 O-ring 18.4x2.4
44 O-ring 20.3x1.5
45 Valve Set
46 O-ring 9.5x1.9
47 O-ring 10.3x1.9
48 Trigger Valve Head
49 O-ring 12.8x1.9
50 Spring
51 O-ring 5.5x1.5
52 Trigger Valve Stem
53 O-ring 24.8x2
54 Trigger Valve Guide
55 Trigger Spring

55a Locking Washer Ø3

56 Trigger
57 Rotating Shaft Bushing

57a Steel Ball

Part Description

57b Spring

58 Mode Switch
59 Rail
60 Washer
61 Nut
62 Washer
63 Coil Spring Assembly
64 Pin
65 Bushing
66 Screw
67 Block
68 Feeder Shoe
69 Screw
70 Magazine
71 Screw
72 Support
73 Nut
74 Lock
75 Torsion Spring
76 Bushing
77 Nut
78 Nut
79 Soft Grip Sleeve
80 Gasket
81 End Cap
82 Screw
83 Air Plug

40a 40

REV 12e

Page 18 For technical questions, please call 1-800-444-3353. Item 69927

69928

69928 Parts List and Diagram

Part Description

1 Screw M5×20
2 Spring Washer Ø5
3 Bushing
4 Exhaust Cover
5 Seal
6 Screw M6×30
7 Spring Washer Ø6
8 Cylinder Cap

9 Gasket
10 Washer
11 Valve Seat
12 Spring
13 O-ring 57.5×2.6
14 O-ring 72.4×3.5
15 Valve
16 Screw M6×8
17 Cylinder Seal
18 Collar
19 O-ring 54.4×4
20 Piston Assembly
21 Cylinder
22 O-ring 67×3
23 O-ring 60.25×2.5
24 Restrictive Plate
25 O-ring 97.5×3.5
26 Bumper A
27 Bumper B
28 Body
29 O-ring 62.3×1.8
30 Nose

Part Description

31 Spring Washer Ø8
32 Screw M8×25
33 Spring
34 Safety Bracket A
35 Screw M5×12
36 Bushing
37 Safety Nosepiece
38 Washer
39 Depth Adjustment Screw M5×10
40 Rubber Cover

40a Cover Clip

41 Spring Pin
42 Safe Guide
43 O-ring 18.4x2.4
44 O-ring 20.3x1.5
45 Valve Set
46 O-ring 9.5x1.9
47 O-ring 10.3x1.9
48 Trigger Valve Head
49 O-ring 12.8x1.9
50 Spring
51 O-ring 5.5x1.5
52 Trigger Valve Stem
53 O-ring 24.8x2
54 Trigger Valve Guide
55 Spring

55a Locking Washer Ø3

56 Trigger
57 Rotating Shaft Bushing

57a Steel Ball

Part Description

57b Spring

58 Mode Switch
59 Rail
60 Washer Ø5
61 Nut M4
62 Spring Washer Ø5
63 Coil Spring Assembly
64 Pin
65 Bushing
66 Screw M4×8
67 Block
69 Feeder Shoe
70 Screw M5×14
71 Magazine
72 Screw M4×16
73 Support
74 Nut M5
75 Lock
76 Torsion Spring
77 Bushing
78 Nut M4
79 Nut M6
80 Soft Grip Sleeve
81 Gasket
82 End Cap
83 Screw M5×20
84 Air Plug

SAFETYOPERATIONMAINTENANCE SETUP

REV 12e

69928

40a 40

Page 19For technical questions, please call 1-800-444-3353.Item 69927

Limited 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 verifies 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 specific 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