AIR STAPLER
1/4” CROWN, 18 GAUGE
40072 / 40073
Models
/ 97521
SET UP ANd OPERATING INSTRUCTIONS
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE ThIS MANUAL.
Copyright© 2007 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.
Manual Revised 10a
WARNING – When using tools, basic
precautions should always be followed,
including the following:
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.
General
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.
a. To reduce the risks of electric shock,
fire, and injury to persons, read all the
instructions before using the tool.
Work area
e.
Use safety equipment. A
dust mask, non-skid safety
shoes and a hard hat must be
used for the applicable
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.
conditions. Wear heavy-duty work
gloves during use.
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.
f.
Always wear eye protection.
Wear ANSI-approved safety
goggles with side shields.
g.
c. Keep bystanders, children, and
visitors away while operating the tool.
Distractions are able to result in the loss
of control of the tool.
Always wear hearing
protection when using the
tool. Prolonged exposure to
high intensity noise is able to cause
hearing loss.
Personal safety
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.
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.
i.
Always assume that the tool contains
fasteners. Do not point the tool toward
yourself or anyone whether it contains
fasteners or not.
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.
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
c. Avoid unintentional starting. Be
sure the trigger is released before
trigger, the tool is able to fire a fastener.
SKU’s 40072,
For technical questions, please call 1-800-444-3353.
Page 3
40073, & 97521
specific tool model, increases the risk of
injury to persons.
Tool use and care
a. Use clamps or another practical way
to secure and support the workpiece
to a stable platform. Holding the work
by hand or against the body is unstable
and can lead to loss of control.
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.
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.
Service
a. Tool service must be performed only
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.
by qualified repair personnel.
b. When servicing a tool, use only
identical replacement parts. Use only
authorized parts.
c. Use only the lubricants supplied
with the tool or specified by the
manufacturer.
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.
Air source
a.
Never connect to an air
source that is capable of
exceeding 200 PSI. Over
pressurizing the tool may
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.
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.
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.
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.
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
SAVE ThESE
INSTRUCTIONS.
Page 4
For technical questions, please call 1-800-444-3353.
SKU’s 40072,
40073, & 97521
b. Performing any maintenance or repair.
c. Clearing a jam.
SPECIFIC SAFETY
INSTRUCTIONS
d. Moving the tool to a new location.
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.
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.
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.
16. Do not fire fasteners too close to the
edge of a workpiece. They may split the
workpiece and fly free, causing personal
injury.
5. Do not point the tool toward yourself or
anyone whether it contains fasteners or
not.
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.
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.
18. Transport Tool safely. Always disconnect
air supply when moving the tool. Carry
the tool by the handle and avoid contact
with the trigger.
9. Do not load the tool with fasteners when
any one of the operating controls, such
as the Trigger or Safety Nosepiece, is
activated.
19. Hold tool away from head and body.
During operation the Tool may kick back
causing injury.
10. Do not remove, tamper with, or otherwise
cause the tool operating controls to
become inoperable.
20. Do not fire fasteners into a workpiece
that has people, utility lines, or other
objects behind or inside it.
11. Do not operate the tool if any portion of
the tool operating controls is inoperable,
disconnected, altered, or not working
properly.
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.
12. Disconnect the tool from the air supply
when:
a. Unattended.
SKU’s 40072,
For technical questions, please call 1-800-444-3353.
Page 5
40073, & 97521
22. Obey the manual for the air compressor
used to power this tool.
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.
To reduce the risk of vibration-related injury:
23. Install an in-line shutoff valve to allow
immediate control over the air supply
in an emergency, even if a hose is
ruptured.
24. Do not engrave or stamp anything into
the housing to prevent weakening of the
housing.
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
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
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.
• 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
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.
microscopic particles. (California Health 4. Use tools with the lowest vibration when
& Safety Code § 25249.5, et seq.)
there is a choice between different
processes.
26. WARNING: The brass components of
this product contain lead, a chemical
known to the State of California to cause
birth defects (or other reproductive
harm). (California Health & Safety code
§ 25249.5, et seq.)
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.
27. The warnings and precautions discussed
in this manual cannot cover all possible
conditions and situations that may occur.
It must be understood by the operator
that common sense and caution are
factors which cannot be built into this
product, but must be supplied by the
operator.
7. To reduce vibration, maintain tool as
explained in this manual. If abnormal
vibration occurs, stop immediately.
SAVE ThESE
INSTRUCTIONS.
Page 6
For technical questions, please call 1-800-444-3353.
SKU’s 40072,
40073, & 97521
Note: To connect this tool, we recommend
a quick coupler/adapter (not included).
Coupler/adapters are available at Harbor
Freight Tools. For smoother operation,
put 3-5 drops of pneumatic tool oil in the
Air Plug (82) before each use.
SPECIFICATIONS
Operating
Pressure
60-100 PSI
Staple Capacity 80
Staple Length / 3/4” to 1-1/2”, 1/4” Crown,
Type
.039-.042” Shank (18 Gauge)
Air Inlet
1/4” NPT (18 TPI - male/female
adapter included)
Testing the Single Sequential Safety
Trip Mechanism
Note: SKU’s 40072 and 97521 contain the
Stapler by itself.
Warning: Even though the Stapler should
be empty during this procedure,
ALWAYS point the Stapler at a piece
of scrap wood when testing.
SKU 40073 contains the Stapler,
pneumatic tool oil, 2 hex wrenches, and
a blowmold carrying case.
1. Make sure the tool is disconnected from
the power supply.
UNPACkING
2. Completely empty the magazine of
staples.
When unpacking, make sure the item
is intact and undamaged. If any parts are
missing or broken, call Harbor Freight Tools at
1-800-444-3353 as soon as possible.
3. The Stapler should not fire if the nose is
not depressed against the workpiece.
4. Check that the Trigger (39) and the
Safety (52) move freely, without sticking.
OPERATION
5. Connect the air supply to the tool at the
Air Plug (82) set at the recommended
60-100 PSI, and not to go over the
maximum 100 PSI.
For best service, incorporate an oiler,
regulator, and inline filter, as shown in the
diagram below. Hoses, couplers, oilers,
regulators, and filters are all available at
Harbor Freight Tools.
6. Test the tool by depressing the Safety
(52) against the workpiece without
pulling the Trigger (39). The tool must
not cycle (fire). If it cycles (fires),
stop immediately and take the tool to a
qualified service technician.
Coupler
Plug
Coupler
Plug
Tool
Quick
Coupler
7. Hold the tool away or off of the
workpiece. The Safety (52) of the tool
should return to its original position.
Squeeze the Trigger (39). The tool
should not cycle (fire). If it cycles
(fires), stop immediately and take the
tool to a qualified service technician.
Air hose
on Reel
Valve
Oiler
Filter
Air
Compressor
8. Depress the Safety (52) against the
workpiece and squeeze the Trigger (39).
The tool must cycle (fire) once only.
Release the trigger and squeeze it again.
The tool must cycle (fire) once only.
Regulator with
Pressure Gauge
Recommended Air Line Components
REV 10a
SKU’s 40072,
For technical questions, please call 1-800-444-3353.
Page 7
40073, & 97521
With the Trigger held, carefully lift the
nailer 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.
Clearing jams
TO PREVENT
SERIOUS INjURY
FROM ACCIdENTAL OPERATION,
BEFORE ANY MAINTENANCE OR
REPAIRS ARE dONE (including
clearing jams):
Loading Staples
• 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.
ALWAYS WEARANSIAPPROVEd
IMPACT SAFETY GOGGLES
WhEN RELOAdING OR dOING
ANY OThER MAINTENANCE ON
ThIS TOOL. Other people in the
work area must also wear ANSI
approved impact safety goggles.
• 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.
Warning! MakesuretheStaplerisnotattached
to the air hose whenever loading the tool.
1. Release the Latch (69) and pull back on
Magazine B (61).
• Empty the magazine and leave it
2. Insert a row of clean, undamaged
staples with the crowns up.
open during service.
1. Disconnect tool from air hose, empty
Magazine A (66) of staples, release
any built-up air pressure, and leave the
magazine open, as explained above.
Safety Cover
3. Push Magazine B (61) forward until the
Latch (69) snaps into place.
Operating the Stapler
FIGURE 1
Bolt (53)
1. Attach the Stapler to the air supply at the
Air Plug (82). Start your compressor and
check the pressure, making sure it is set
at the recommended 60-100 PSI and not
to go over the maximum 100 PSI.
2. To fire, place the nose of the Stapler on
the workpiece. The Stapler should not
fire if the nose is not depressed. Once
depressed, gently and briefly squeeze
the Trigger (39) once. Do not fire
2. While doing this step and the next, hold
the Stapler pointed away from you and
any other people or fragile objects - see
Figure 1. Remove all three Safety Cover
Bolts (53) on the Safety Cover (54).
repeatedly. Staples could bounce off
of one another, damaging the work
piece or causing PERSONAL INjURY.
3. After disconnecting the Stapler, the Nut
(39), near the trigger, can be turned to
adjust the depth. After adjusting, be sure
to practice on scrap wood before working
on a project.
Page 8
For technical questions, please call 1-800-444-3353.
SKU’s 40072,
40073, & 97521
10. Disconnect the Stapler, remove the
staples, and store the Stapler in a
location out of children’s reach.
Safety (52)
FIGURE 2
Safety
Cover (54)
MAINTENANCE
TO PREVENT
SERIOUS INjURY
FROM ACCIdENTAL OPERATION,
BEFORE ANY MAINTENANCE OR
REPAIRS ARE dONE (including
clearing jams):
3. Lift the Safety Cover (54) off the top of
the stapler - see Figure 2.
FIGURE 3
• 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.
Driver
Cover
(57)
• Attempt to fire the Tool into a
piece of scrap wood to ensure
that it is disconnected and is
incapable of firing any fasteners.
Driver
(19)
4. Carefully slide the Driver Cover (57) off
around the Safety (52) and remove the
jammed staple - see Figure 3. Use pliers
to remove a stuck staple.
• Empty the magazine and leave it
open during service.
Note: If the Stapler leaks air, continually
skips staples, does not drive the staple
properly, or the Trigger (39) or Safety
(52) do not move freely have it serviced
by a qualified service technician.
5. Inspect the Driver (19) for bends
or breakage - see Figure 3. If it is
damaged, do not use the tool until it is
repaired by a qualified technician.
1. After each use, check the tightness on all
visible screws.
6. Lightly oil the Driver (19) and replace the
Driver Cover (57). Replace the Safety
Cover (54), being careful to line up the
bolt holes and fit the Safety (52) into the
slot. Replace and securely tighten all of
the Safety Cover Bolts (53). The Safety
(52) must move without sticking.
2. Wipe the Stapler clean daily with a
damp cloth and non-flammable cleaning
solution. Never soak the Stapler.
3. Make sure that no dirt or debris blocks
the fastener discharge area.
4. Any maintenance, service, or
repairs, apart from those procedures
explained in this manual, are to
be attempted only by a qualified
technician.
7. Reload the Stapler.
8. Reconnect the Stapler to the air hose.
9. Press the Safety (52) of the Stapler
against an appropriate piece of scrap
wood and test fire the Stapler several
times, checking for proper operation.
REV 10a
SKU’s 40072,
For technical questions, please call 1-800-444-3353.
Page 9
40073, & 97521
PARTS LIST
Part
1
description
Exhaust Deflector
O-Ring
Part
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
description
Trigger Valve Upper
Spring
Part
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
description
Driver Cover
2
Driver Guide
Hex. Bolt
Pin
3
Hex. Bolt
Head Cap
Seal
O-Ring
4
Trigger Plunger
O-Ring
5
Magazine B
Pusher Unit
Spring Holder
O-Ring
6
Internal Lining
O-Ring
Trigger Valve Lower
Compression Spring
Trigger Plate
Spring Pin
E-Ring
7
8
Compression Spring
Gasket
9
Spring
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
O-Ring
Magazine A
Hex. Bolt
Retainer Pin
Latch
Head Valve Piston
O-Ring
Trigger
Retainer Pin
Safety Guide
Spring Washer
Hex Bolt
O-Ring
O-Ring
Spring
Collar
O-Ring
O-Ring
Spring Pin
Spring
Hex Bolt
Cylinder Pin
Tail Cover
Hex. Bolt
Hex. Bolt
Tail Hanger
Lock Nut
Hand Grip
O-Ring
Piston
Pin
Screw Nut
Thumb Wheel
Spring
Driver
O-Ring
Lining Ring
O-Ring
Steel Ball
Stopper
Cylinder
O-Ring
E-Ring
Safety
Bumper
Safety Cover Bolt
Safety Cover
Hex. Bolt
End Cap
Air Plug
Body
Nozzle
Seal
Spacer
PLEASE REAd ThE FOLLOWING CAREFULLY
ThE MANUFACTURER ANd/OR dISTRIBUTOR hAS PROVIdEd ThE PARTS dIAGRAM IN ThIS
MANUAL AS A REFERENCE TOOL ONLY. NEIThER ThE MANUFACTURER NOR 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, ORARISING
OUT OF hIS OR hER INSTALLATION OF REPLACEMENT PARTS ThERETO.
Note: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
Page 10
For technical questions, please call 1-800-444-3353.
SKU’s 40072,
40073, & 97521
ASSEMBLY dIAGRAM
SKU’s 40072,
For technical questions, please call 1-800-444-3353.
Page 11
40073, & 97521
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 OFALL 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
Page 12
For technical questions, please call 1-800-444-3353.
SKU’s 40072,
40073, & 97521
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