Owner’s Manual & Safety Instructions

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. 19h

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Email our technical support at: productsupport@harborfreight.com
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright© 2019 by Harbor Freight Tools®. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in Read this material before using this product.
any shape or form without the express written consent of Harbor Freight Tools. Failure to do so can result in serious injury.
Diagrams within this manual may not be drawn proportionally. Due to continuing SAVE THIS MANUAL.
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
 table of contents
Safety ........................................................................2 Maintenance .............................................................16
Specifications ............................................................8 Parts List and Diagram .............................................18
Setup .........................................................................9 Warranty ...................................................................20
Operation ..................................................................12
SaFEty

WarninG SyMBOLS anD DEFinitiOnS

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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.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.

Indicates a hazardous situation which, if not avoided,

could result in death or serious injury.

Indicates a hazardous situation which, if not avoided,

could result in minor or moderate injury.

Addresses practices not related to personal injury.

OpEratiOn

Symbol property or statement Symbol property or statement

Warning marking concerning
pSi Pounds per square inch of pressure Risk of Puncture Injury.
Wear heavy-duty work gloves.
cFM Cubic Feet per Minute flow
Read the manual before
set-up and/or use.
Cubic Feet per Minute flow
ScFM at standard conditions WARNING marking concerning
Risk of Hearing Loss.
npt National pipe thread, tapered Wear hearing protection.
MaintEnancE

WARNING marking concerning

Risk of Respiratory Injury. Wear
npS National pipe thread, straight
NIOSH-approved dust mask/respirator.
WARNING marking concerning
WARNING marking concerning
Risk of Eye Injury. Wear ANSI-approved
Risk of Explosion.
safety goggles with side shields.

table a: Symbol Definitions

Page 2 For technical questions, please call 1-888-866-5797. Item 56388

 iMpOrtant SaFEty inStructiOnS
inStructiOnS pErtaininG tO a riSK OF FirE,
ELEctric SHOcK, Or inJury tO pErSOnS

SaFEty
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
a. Keep the work area clean and well lighted. c. Keep bystanders, children, and visitors away
Cluttered benches and dark areas increase the while operating the tool. Distractions are able
risks of electric shock, fire, and injury to persons. to result in the loss of control of the tool.

b. Do not operate the tool in explosive

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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. f. always wear eye protection.
Do not use the tool while tired or under the Wear ANSI-approved safety goggles
influence of drugs, alcohol, or medication. with side shields.
A moment of inattention while operating the
tool increases the risk of injury to persons.
g. always wear hearing protection

OpEratiOn
b. Dress properly. Do not wear loose clothing when using the tool.
or jewelry. contain long hair. Keep hair, Prolonged exposure to high intensity
clothing, and gloves away from moving noise is able to cause hearing loss.
parts. Loose clothes, jewelry, or long hair
increases the risk of injury to persons as a h. Do not attach the hose or tool to your body.
result of being caught in moving parts. Attach the hose to the structure to reduce the
risk of loss of balance if the hose shifts.
c. avoid unintentional starting.
Be sure the trigger is released before i. always assume that the tool contains fasteners.
connecting to the air supply. Do not carry the Do not point the tool toward yourself or anyone
tool with your finger on the Trigger or connect the whether it contains fasteners or not.
tool to the air supply with the Trigger pressed.
j. WarninG – Do not drive fastener on top of
d. Do not overreach. Keep proper another fastener. This is able to cause the fastener
footing and balance at all times. to be deflected and hit someone, or cause the Tool
Proper footing and balance enables better to react and result in a risk of injury to persons.
MaintEnancE

control of the tool in unexpected situations.

k. WarninG – remove finger from the
e. use safety equipment. trigger when not driving fasteners.
A dust mask, non-skid safety shoes Never carry the Tool with finger on Trigger,
and a hard hat must be used for the the Tool is able to discharge a fastener.
applicable conditions. Wear heavy-
duty work gloves during use.

Item 56388 For technical questions, please call 1-888-866-5797. Page 3

 tool use and care
a. Use clamps or another practical way to secure f. Maintain the tool with care.
and support the workpiece to a stable platform. A properly maintained tool reduces the
Holding the work by hand or against the body risk of binding and is easier to control.
is unstable and can lead to loss of control.
g. check for misalignment or binding of moving
SaFEty

b. Do not force the tool. Use the correct tool for the parts, breakage of parts, and any other condition
application. The correct tool will do the job better that affects the tool’s operation. If damaged, have
and safer at the rate for which the tool is designed. the tool serviced before using. Many accidents
are caused by poorly maintained tools.
c. Do not use the tool if the trigger does not There is a risk of bursting if the tool is damaged.
turn the tool on or off. Any tool that cannot
be controlled with the Trigger is dangerous h. use only accessories that are identified by the
and must not be used until repaired. manufacturer for the specific tool model. Use of
an accessory not intended for use with the specific
d. Disconnect the tool from the air source tool model, increases the risk of injury to persons.
before making adjustments, doing tool
maintenance, clearing jams, touching the i. use only those fasteners listed in the
Workpiece contact, leaving work area, loading, Specifications chart of this manual.
or unloading the tool. Such precautionary Fasteners not identified for use with this tool by the
measures reduce the risk of injury to persons. tool manufacturer are able to result in a risk of injury
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to persons or tool damage when used in this tool.

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.

Service
a. Tool service must be performed only c. use only the lubricants supplied with the
by qualified repair personnel. tool or specified by the manufacturer.

b. When servicing a tool, use only identical

replacement parts. use only authorized parts.

air Source
OpEratiOn

a. never connect to an air source that b. Never use oxygen, carbon dioxide, combustible
is capable of exceeding 200 pSi. gases or any bottled gas as an air source
Over pressurizing the tool may cause for the tool. Such gases are capable of
bursting, abnormal operation, explosion and serious injury to persons.
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.

MaintEnancE

Page 4 For technical questions, please call 1-888-866-5797. Item 56388

 Specific Safety instructions

1. Operators and others in work area MuSt 15. Drive fasteners into an appropriate
wear anSi-approved safety goggles with work surface only. Do not attempt to discharge
side shields during use. The employer is fasteners into surfaces too hard to penetrate.
responsible to enforce the use of eye protection Do not drive fasteners on top of other fasteners,

SaFEty
by the operator and others in the work area. or at too steep of an angle. Fasteners
can ricochet causing personal injury.
2. Keep fingers away from trigger when not driving
fasteners to avoid accidental discharge. 16. Do not drive fasteners too close to the edge
of a workpiece. They may split the workpiece
3. choice of triggering method is important. and fly free, causing personal injury.
check manual for triggering options.
17. Keep clear of the workpiece near the area being
4. Always assume the Tool contains fasteners. fastened. Fasteners may bend sideways during
driving, causing them to exit the workpiece at
5. Do not point the Tool toward yourself or anyone
an unexpected point, causing personal injury.
whether it contains fasteners or not.
18. Transport Tool safely. Always disconnect air
6. Do not actuate the Tool unless the Tool is
supply when moving the Tool. Carry the Tool by
placed firmly against the workpiece.
the handle and avoid contact with the Trigger.

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7. Respect the Tool as a working implement.
19. Hold Tool away from head and body.
8. No horseplay. This Tool is not a toy During operation the Tool may
and can be deadly if misused. kick back causing injury.

9. Do not load the Tool with fasteners when any 20. Do not drive fasteners into a workpiece
one of the operating controls, such as the that has people, utility lines, or other
Trigger or Workpiece Contact, is activated. objects behind or inside it.

10. Do not remove, tamper with, or otherwise cause 21. Keep balance while using this Tool.
the Tool operating controls to become inoperable. Keep area below clear if working in an elevated
location, and secure air hose to prevent falls
11. Do not operate the Tool if any portion of from bystanders accidentally pulling on it.
the Tool operating controls is inoperable,
disconnected, altered, or not working properly. 22. Obey the manual for the air compressor

OpEratiOn
used to power this Tool.
12. Disconnect the Tool from the air supply when:
23. Install an in-line shutoff valve to allow
a. Unattended. immediate control over the air supply in an
b. Performing any maintenance or repair. emergency, even if a hose is ruptured.
c. Clearing a jam. 24. Do not engrave or stamp anything into
d. Moving the Tool to a new location. the housing to avoid weakening it.

13. Do not make any modifications to this Tool. 25. The warnings and precautions discussed in this
manual cannot cover all possible conditions and
14. Refer to the Tool maintenance instructions situations that may occur. It must be understood
for detailed information on the proper by the operator that common sense and caution
maintenance of the Tool. are factors which cannot be built into this
product, but must be supplied by the operator.
MaintEnancE

Item 56388 For technical questions, please call 1-888-866-5797. Page 5

 Vibration precautions
This tool vibrates during use. 2. Do not smoke during use. Nicotine reduces
Repeated or long-term exposure to vibration may the blood supply to the hands and fingers,
cause temporary or permanent physical injury, increasing the risk of vibration-related injury.
particularly to the hands, arms and shoulders.
To reduce the risk of vibration-related injury: 3. Wear suitable gloves to reduce the
SaFEty

vibration effects on the user.

1. Anyone using vibrating tools regularly or for
an extended period should first be examined 4. Use tools with the lowest vibration when there
by a doctor and then have regular medical is a choice between different processes.
check-ups to ensure medical problems are not
5. Include vibration-free periods each day of work.
being caused or worsened from use. Pregnant
women or people who have impaired blood 6. Grip tool as lightly as possible (while still keeping
circulation to the hand, past hand injuries, safe control of it). Let the tool do the work.
nervous system disorders, diabetes, or
Raynaud’s Disease should not use this tool. 7. To reduce vibration, maintain tool as explained
If you feel any symptoms related to vibration (such in this manual. If abnormal vibration occurs,
as tingling, numbness, and white or blue fingers), stop immediately.
seek medical advice as soon as possible.
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OpEratiOn
MaintEnancE

Page 6 For technical questions, please call 1-888-866-5797. Item 56388

roofing precautions
Falling or being hit by a falling object can cause serious injury, paralysis, and DEatH.

1. Post warning signs and barriers 3. Use appropriate safety equipment, such as,
to keep the area below the work area clear. but not limited to: fall arrest systems,
Do not allow anyone under 18 years old safety net systems, roof jacks, and

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in or under the work area. guard rails with toeboards.

2. Do not climb while holding Tool in your hand or 4. Follow OSHA requirements for working on roofs.
transport Tool to roof with air supply attached.
Disconnect air supply and use a tool belt, holster,
or pull Tool up using a rope after climbing.

SaVE tHESE inStructiOnS.

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OpEratiOn
MaintEnancE

Item 56388 For technical questions, please call 1-888-866-5797. Page 7

 Functional Description

Specifications
Maximum Air Pressure 120 PSI
SaFEty

Air Inlet 3/8"–18 NPT

Contact Actuation and
Actuation System
Sequential switchable trigger
0.092-0.099″ Diameter, 15° Angle, Coiled,
Nail Type 1-1/4″ – 2-1/2″ Long Plastic Sheet,
1-3/4″ – 2-1/2″ Long Wire Weld

components and controls

Exhaust
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trigger
air inlet
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Depth
adjustment
Knob

Magazine

Workpiece
contact
MaintEnancE

Latch

Workpiece contact - The Workpiece Contact helps prevent the Tool

from discharging unless it is pressed against an object.

Page 8 For technical questions, please call 1-888-866-5797. Item 56388

 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.

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

SaFEty
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, 4. Release the Tool’s Trigger and empty its Magazine.
oiler, in-line shutoff valve, and quick coupler for
best service, as shown on Figure A on page 10 5. Close the in-line safety valve between
and Figure B on page 11. an in-line shutoff the compressor and the Tool.

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ball valve is an important safety device because
6. Turn on the air compressor according to
it controls the air supply even if the air hose
the manufacturer’s directions and allow it
is ruptured. the shutoff valve should be a
to build up pressure until it cycles off.
ball valve because it can be closed quickly.
7. Adjust the air compressor’s output regulator
note: If an automatic oiler system is not used,
so that the air output is enough to properly
add a few drops of Pneumatic Tool Oil into
power the Tool, but the output will not exceed
the airline connection before operation.
the Tool’s maximum air pressure at any time.
Add a few more drops after each hour of continual use.
Adjust the pressure gradually, while checking the
note: This air Tool may be shipped with a protective plug air output gauge to set the right pressure range.
covering the air inlet. Remove this plug before set up.
8. The air pressure setting must not exceed job site
2. Attach an air hose to the compressor’s air outlet. regulations/restrictions. The air pressure setting
Connect the air hose to the air inlet of the Tool. must not exceed 90 PSI when being used with

OpEratiOn
Other components, such as a coupler plug workpieces that have a thickness of less than 1-3/4″.
and quick coupler, will make operation
9. Inspect the air connections for leaks.
more efficient, but are not required.
Repair any leaks found.
WarninG! tO prEVEnt SEriOuS inJury 10. If the Tool will not be used at this time,
FrOM acciDEntaL DiScHarGE: turn off and detach the air supply,
Do not install a female quick coupler on the tool. safely discharge any residual air pressure, and
Such a coupler contains an air valve that will release the Trigger to prevent accidental discharge.
allow the air Tool to retain pressure and operate
accidentally after the air supply is disconnected. note: Residual air pressure should not be present
after the Tool is disconnected from the air supply.
note: Air flow, and therefore Tool performance, However, it is a good safety measure to attempt to
can be hindered by undersized air supply components. discharge the Tool in a safe fashion after disconnecting
3. The air hose must be long enough to reach to ensure that the Tool is disconnected and unpowered.
the work area with enough extra length to
MaintEnancE

allow free movement while working.

Item 56388 For technical questions, please call 1-888-866-5797. Page 9

 MaintEnancE OpEratiOn SEtup SaFEty

Figure a: portable air Supply Setup

Page 10
Lubricated
c
tools
B D a E F

non-lubricated E H
tools
c
B G a
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

For technical questions, please call 1-888-866-5797.

D Lubricator (optional) For air Tool lubrication
E Coupler and Plug Provides quick connection and release
F Leader Hose (optional) Increases coupler life
G Air Cleaner / Dryer (optional) Prevents water vapor from damaging workpiece
H Air Adjusting Valve (optional) For fine tuning airflow at Tool

Item 56388
 Figure B: Stationary air Supply Setup

Slope

Item 56388
Lubricated
tools
G J
c K H L M F
c D E

i n

c J L O
B B
F
a a H
F non-lubricated tools

Description Function
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
D Isolation Hose For vibration reduction
E Main Air Line - 3/4″ minimum recommended Distributes air to branch lines

For technical questions, please call 1-888-866-5797.

F Ball Valve To drain moisture from system
G Branch Air Line -1/2″ minimum recommended Brings air to point of use
H Air Hose Connects air to Tool
I Filter Prevents dirt and condensation from damaging Tool or workpiece
J Regulator Adjusts air pressure to Tool
K Lubricator (optional) For air Tool lubrication
L Coupler and Plug Provides quick connection and release
M Leader Hose (optional) Increases coupler life
N Air Cleaner / Dryer (optional) Prevents water vapor from damaging workpiece
O Air Adjusting Valve (optional) For fine tuning airflow at Tool

Page 11
MaintEnancE OpEratiOn SEtup SaFEty
 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.
SaFEty

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. 3. Secure loose workpieces using a vise or clamps
The work area must not allow access by children (not included) to prevent movement while working.
or pets to prevent distraction and injury.
4. There must not be hazardous objects
2. Route the air hose along a safe route to reach (such as utility lines or foreign objects) nearby
the work area without creating a tripping hazard that will present a hazard while working.
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.
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Switchable trigger

tO prEVEnt SEriOuS inJury FrOM acciDEntaL DriVinG:

• release trigger and point tool in a safe direction before changing actuation mode.

• OnLy operate the tool with the Switch fully in one of the actuation mode positions.

1. Use the Switch behind the Trigger 3. Turn the Switch to the (multiple nail) setting
to adjust Actuation Method. to enable contact actuation operation for rapid
placement of fasteners. Only a skilled operator
2. Turn the Switch to the (single nail) setting who is aware of the hazards and uses
OpEratiOn

to enable Single Sequential operation proper, safe work practices should

for precise placement of fasteners. use contact actuation operation.

Single-Sequential actuation Mechanism Definition

The single-sequential actuation mechanism is designed to allow accurate placement of fasteners. Use the
switch near the trigger to change modes. The Tool should only actuate if the Workpiece Contact is pressed
against the workpiece prior to pulling the Trigger. It should only actuate again if the Trigger is released and
squeezed again. The Tool should not actuate if the Workpiece Contact is not pressed against an object.

Single-Sequential actuation Mechanism testing procedure

tO prEVEnt SEriOuS inJury FrOM acciDEntaL DiScHarGE:

MaintEnancE

Empty the tool before this procedure. point the tool at a piece of scrap wood when testing.

1. Disconnect the Tool from the air supply. 4. Connect the air supply to the Tool and
set within the Operating Air Pressure
2. Empty the magazine of fasteners. indicated on the Specification chart.
3. Check that the Trigger and the Workpiece 5. Test the Tool by pressing the Workpiece Contact
Contact move freely, without sticking. against the workpiece without pulling the Trigger.
the tool must not cycle (actuate).
If it cycles (actuates), stop immediately and have
it repaired by a qualified service technician.

Page 12 For technical questions, please call 1-888-866-5797. Item 56388

6. Hold the Tool away, or off of the workpiece. 7. Press the Workpiece Contact against the workpiece
The Workpiece Contact should return to its original and squeeze the Trigger.
position. Squeeze the Trigger. the tool must cycle (actuate) only once.
the tool must not cycle (actuate). Release the Trigger, slide the Tool to a fresh piece of
If it cycles (actuates), stop immediately and take wood, and squeeze it again.
the Tool to a qualified service technician. the tool must cycle (actuate) again only once.
With the Trigger depressed, carefully lift the Tool and

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press it against the workpiece again.
the tool must not cycle (actuate).
If it fails to act in the manner explained in bold,
have it repaired by a qualified service technician.

contact actuation Mechanism Definition

The contact actuation mechanism allows rapid placement of fasteners. Use the switch on the trigger to
change modes. The Tool should only actuate if the Workpiece Contact is pressed against the workpiece
and the Trigger is pulled. It should actuate again if the Trigger is released and pulled OR if the Workpiece
Contact is lifted and pressed against the workpiece again. The Tool should not actuate if the Workpiece
Contact is not pressed against an object. contact actuation should only be enabled and used
by skilled operators who are aware of the hazards and use proper, safe work practices.

contact actuation Mechanism testing procedure

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tO prEVEnt SEriOuS inJury FrOM acciDEntaL DiScHarGE:
Empty the tool before this procedure. point the tool at a piece of scrap wood when testing.

1. Disconnect the Tool from the air supply. 6. Hold the Tool away, or off of the workpiece.
The Workpiece Contact should return to its original
2. Empty the magazine of fasteners. position. Squeeze the Trigger.
the tool must not cycle (actuate).
3. Check that the Trigger and the Workpiece
If it cycles (actuates), stop immediately and take
Contact move freely, without sticking.
the Tool to a qualified service technician.
4. Connect the air supply to the Tool and
7. Press the Workpiece Contact against the workpiece

OpEratiOn
set within the Operating Air Pressure
and squeeze the Trigger.
indicated on the Specification chart.
the tool must cycle (actuate) only once.
5. Test the Tool by pressing the Workpiece Contact Release the Trigger, slide the Tool to a fresh piece of
against the workpiece without pulling the Trigger. wood, and squeeze it again.
the tool must not cycle (actuate). the tool must cycle (actuate) again only once.
If it cycles (actuates), stop immediately and have With the Trigger depressed, carefully lift the Tool
it repaired by a qualified service technician. and press it against the workpiece again in a new
location.
the tool must cycle (actuate) again only once.
If it fails to act in the manner explained in bold,
have it repaired by a qualified service technician.
MaintEnancE

Item 56388 For technical questions, please call 1-888-866-5797. Page 13

 Loading the tool

tO prEVEnt SEriOuS inJury FrOM acciDEntaL DiScHarGE, 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.
SaFEty

• release the trigger.

• Detach the air supply.
• attempt to discharge the tool into a piece of scrap wood to ensure that
it is disconnected and is incapable of driving any fasteners.
1. Push down on the Latch (79) and swing the Nail 5. Uncoil enough nails to reach the front of the
Guide (71) and the Magazine Cover (106) open. Feeder and fit the nail heads into the Guide Slot.

2. Check the Nail Support Plate (104) inside the 6. Insert the first nail between the
Magazine. Adjust the Plate to match the nail two Pawls of the Feeder.
length as marked inside the magazine.
7. Swing the Magazine Cover closed.
3. Adjust the Nail Support Plate up or down to align
the Plate edge with the appropriate embossed nail 8. Close the Nail Guide. Make sure the Latch closes
size marking on the inside wall of the Magazine. securely. If the Nail Guide does not fully close
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and the Latch does not engage properly, the nail

4. Place a coil of nails around the Nail heads are not in the Guide Slot and the first nail
Support Plate in the Magazine. shank is not between the two Pawls of the Feeder.
Magazine cover

nails
OpEratiOn

nail Support plate Magazine

MaintEnancE

Page 14 For technical questions, please call 1-888-866-5797. Item 56388

General Operating instructions
1. Before each use, test the Tool as trigger
directed in the prior section.
Depth
2. If an automatic oiler is not used, add adjustment
a few drops of Pneumatic Tool Oil to the airline Knob

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connection before use. Add a few drops
more after each hour of continual use.
3. Keep all moving parts free from dirt and debris.
Clean and oil all moving parts before each use.
Magazine
WarninG! tO prEVEnt
SEriOuS inJury: Keep second hand
away from tool discharge area,
especially if holding workpiece.
tool applies extreme force to fastener, Workpiece
and fasteners may deflect or discharge in contact
an unexpected direction.
cautiOn! tO prEVEnt inJury: 7. If, at the maximum depth setting, the Tool
Do not hold tool near body while requires more force to accomplish the
driving. tool recoil can cause injury. task, verify that the Tool receives sufficient,

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WarninG! tO prEVEnt SEriOuS unobstructed airflow (CFM) and increase the
inJury, incLuDinG pErManEnt pressure (PSI) output of the regulator up to the
HEarinG LOSS: maximum air pressure rating of this Tool.
always wear hearing protection when cautiOn! tO prEVEnt inJury
using the tool. FrOM tOOL FaiLurE:
4. Position Tool at desired fastener location Do not exceed the tool’s
and depress the Workpiece Contact fully maximum air pressure rating.
against the workpiece. Squeeze the If the Tool still does not have sufficient force
Trigger to discharge a fastener. at maximum pressure and sufficient airflow,
then a larger Tool may be required.
note: prEVEnt DOuBLE DriVinG.
Allow the Tool to recoil from the workpiece — 8. after use, to prevent accidents:
do not force it against the workpiece. a. release the trigger.

OpEratiOn
5. Driving multiple fasteners using contact b. Detach the air supply.
actuation mode: c. change the Mode Switch to setting.
Squeeze and hold Trigger, then push Workpiece
Contact to discharge one fastener, move d. attempt to discharge the tool into a piece of
and push Workpiece Contact again to scrap wood to ensure that it is disconnected
discharge additional fasteners. and is incapable of driving any fasteners.

6. to change driving depth: Disconnect air supply e. release the trigger again.
and keep Workpiece contact pointed away. f. clean external surfaces with clean, dry cloth.
Turn the Depth Adjustment Knob g. Store indoors out of children’s reach.
to adjust driving depth. MaintEnancE

Item 56388 For technical questions, please call 1-888-866-5797. Page 15

 user-Maintenance instructions

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

tO prEVEnt SEriOuS inJury FrOM acciDEntaL DiScHarGE,

BEFOrE any MaintEnancE Or rEpairS arE DOnE (including clearing jams):
SaFEty

• 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 discharge the tool into a piece of scrap wood to ensure that
it is disconnected and is incapable of driving 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
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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 2. Daily - air Supply Maintenance:
condition of the Tool. Check for: Every day, perform maintenance on the air supply
• proper safety trip mechanism operation according to the component manufacturers'
instructions. Maintain the lubricator's oil level.
• free Workpiece Contact and Trigger movement Drain the moisture filter regularly.
• loose hardware or housing Performing routine maintenance on the air
• misalignment or binding of moving parts supply will allow the Tool to operate more
safely and will also reduce wear on the Tool.
OpEratiOn

• cracked or broken parts

• any other condition that may
affect its safe operation.

clearing Jams
tO prEVEnt SEriOuS inJury FrOM acciDEntaL DiScHarGE,
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 discharge the tool into a piece of scrap wood to ensure that
it is disconnected and is incapable of driving any fasteners.
MaintEnancE

• 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.

1. Open the Nail Guide and insert a rod into the nail 3. If the jam cannot be cleared using the
outlet at the bottom of the Workpiece Contact. Tap method above, have the Tool serviced
the rod with a hammer to free the jammed nail. by a qualified technician.
Remove the jammed nail with a slotted screwdriver. note: Keep tool free of tar and debris to limit jamming.
2. Pull out the remainder of the fastener coil
from the Magazine. Dispose of any damaged
or bent fasteners; they may cause repeated
jamming or damage to the tool if reused.

Page 16 For technical questions, please call 1-888-866-5797. Item 56388

troubleshooting
problem possible causes Likely Solutions
Insufficient 1. Incorrect tool depth setting. 1. Adjust depth setting, if available.
fastener depth. 2. Not enough air pressure. 2. Check for loose connections and make sure that
air supply is providing enough air pressure (PSI) to the

SaFEty
Tool’s air inlet. Do not exceed maximum air pressure.
3. Incorrect lubrication or 3. Lubricate using air Tool oil and grease
not enough lubrication. according to directions.
4. Blocked air inlet screen 4. Clean air inlet screen of buildup.
(if equipped).
5. Mechanism contaminated. 5. Have qualified technician clean and lubricate
mechanism. Install in-line filter in air supply
as stated in Initial Set Up: Air Supply.
Fasteners drive 1. Incorrect Tool depth setting. 1. Adjust depth setting, if available.
too deeply. 2. Too much air pressure. 2. Reduce air supply pressure (PSI).
Tool cycles 1. Jammed fastener. 1. Clear jammed fastener according to
without driving Clearing Jams instructions.
fastener. 2. Tool empty. 2. Reload with correct fasteners.

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3. Incorrect fasteners used. 3. Empty, then reload with correct fasteners.
4. Magazine dirty or not 4. Clean and lubricate Magazine and Pusher.
lubricated properly.
5. Insufficient air flow. 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.
Frequent Incorrect nail type. Confirm nail collation type, diameter, angle,
jamming. type, and length. Correct as needed.
Severe air 1. Cross-threaded housing 1. Check for incorrect alignment and uneven gaps.
leakage. components. If cross-threaded, disassemble and
(Slight air replace damaged parts before use.
leakage

OpEratiOn
2. Loose housing. 2. Tighten housing assembly. If housing cannot tighten
is normal, properly, internal parts may be misaligned.
especially on
3. Damaged valve or housing. 3. Replace damaged components.
older tools.)
4. Dirty, worn or damaged valve. 4. Clean or replace valve assembly.

Follow all safety precautions whenever diagnosing or servicing the tool.

Disconnect air supply before service.

MaintEnancE

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.

Item 56388 For technical questions, please call 1-888-866-5797. Page 17

 parts List and Diagram

parts List
SaFEty

part Description part Description part Description

1 Bolt, M6x20 38 Roll Pin, 2.5X10 75 Check Spring (B)
2 Bushing 39 Adjust Dial 76 Check Pawl (B)
3 Exhaust Cover 40 Safety Guide 77 Check Pawl Pin
4 Exhaust Filter (A) 41 Safety 78 Bolt, M5x22
5 Exhaust Filter (B) 42 Drive Blade 79 Latch
6 Cylinder Cap 43 Piston 80 Latch Spring
7 Bolt, M6x30 44 O-Ring, 37.5X3.55 81 Step Pin
8 Side Protector 45 Snap Ring 4 82 Lock Nut, M5
9 Piston Stop Seat 46 O-Ring, 5.15X1.8 83 O-Ring, 47.5X1.8
10 Piston Stop 47 Adjuster 84 Bolt, M6x25
11 Washer 48 Straight Pin B3x15 85 O-Ring, 9X1.8
12 Compression Spring 49 O-Ring, 18.3X2.65 86 Spring
13 Head Valve Piston 50 Trigger Valve Cage 87 Feed Piston
14 O-Ring, 54X3.1 51 O-Ring, 15.8X1.9 88 O-Ring, 17X2.65
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15 O-Ring, 41.2X2.65 52 Trigger Valve Cap 89 Feed Piston Spring (A)

16 Head Valve Sleeve 53 Trigger Stem 90 Feed Piston Spring (B)
17 Bumper 54 O-Ring, 2.5X1.4 91 Feed Piston Bumper
18 Cylinder Seal 55 Spring 92 Feed Piston Cap
19 O-Ring, 63.8X3.1 56 O-Ring, 8.6X1.9 93 Snap Ring 24
20 O-Ring, 50X2.65 57 O-Ring, 6.7X1.8 94 Nose Cap
21 Cylinder 58 Trigger Valve Bushing 95 End Cap
22 Cylinder Ring 59 O-Ring, 5.5X2 96 Filter
23 Body 60 Pin Cap (C) 97 Snap Ring 32
24 Roll Pin, 3X30 61 Step Pin 98 Spring Holder (B)
25 Handle Grip 62 Feed Spring 99 Magazine
26 Dowel Pin 63 Check Toe 100 Bolt, M5x30
27 Spring 64 Pin Cap (A) 101 Washer
28 Adjust Button 65 Feed Pawl 102 Magazine Pin
29 Contact Plate 66 Feed Pawl Pin 103 Magazine Spring
OpEratiOn

30 Trigger Bracket 67 Nose 104 Nail Support Plate

31 Trigger 68 Door Pin 105 Spring Holder (A)
32 Step Pin 69 Dust Cover 106 Magazine Cover
33 Pin Cap 70 Guard Cover 107 Spring
34 O-Ring, 6.7X1.8 71 Nail Guide 108 Gasket
35 Safety Upper 72 Pin Cap (B) 111 Rubber Button
36 Spring 73 Check Pawl (A) P1 Driver Unit
37 Safety Upper Guide 74 Check Spring (A) P2 Trigger Valve
MaintEnancE

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.

Page 18 For technical questions, please call 1-888-866-5797. Item 56388

assembly Diagram

SaFEty
SEtup
OpEratiOn
MaintEnancE

Item 56388 For technical questions, please call 1-888-866-5797. Page 19

 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.

26541 agoura road • calabasas, ca 91302 • 1-888-866-5797