PNI 461A Instruction Manual

Instruction and Safety Manual
DANGER
Improper use of this Stapler can result in death or serious injury!
This Manual contains important information about product safety.
Read and understand this Manual before operating the Stapler.
Never allow anyone (to handle this Stapler) who has not reviewed this manual.
MODEL 461A 18GA. FLOORING STAPLER
PORTAMATIC
ELEVATOR

2
CONTENTS
IMPORTANT SAFETY INFORMATION …………………………………………. 3
DEFINITIONS OF SIGNAL WORDS ………………….…………………………. 3
SAFETY
IMPORTANT SAFETY INSTRUCTIONS FOR USING
461A STAPLERS ……………………………..…………...…………..……….. 4
EMPLOYERS RESPONSIBILITIES……………………………………………… 7
WARRANTY……………………….…………………...………………………..... 7
OPERATION
NAME OF PARTS ……………………………………...………………………..… 8
SPECIFICATIONS ……………………………………...……………………….…. 9
STAPLE SELECTION ………………………………….…………………………... 9
BEFORE OPERATION ………………………………….………………………….. 9
WORKING ENVIRONMENT ……………….……...………………………….. 9
AIR SUPPLY …………………………………….…..………………………….. 10
LUBRICATION ………………………………….…..………………………….. 10
COLD WEATHER CARE ……………………….….…………………………... 10
TESTING THE STAPLER …………………….…...…………………………... 11
ADJUSTING AIR PRESSURE ……………….…...………………………….. 11
LOADING STAPLES ………………………….…...…………………………... 11
STAPLER OPERATION ………………………………..………………………….. 12
METHODS OF OPERATION ................................………………………………. 12
FASTENER POSITIONING ADJUSTMENT …………………………………….. 13
ADJUSTING THE STAPLING DEPTH ....................……………………………. 13
MAINTENANCE
MAINTENANCE AND INSPECTION ......................……………………………. 14
SERVICE AND REPAIRS .....................................………………………………. 14
EXPLODED VIEW ………………………………………………………………….. 18
PARTS LIST .....................................................…………………………………. 19
Page

3
IMPORTANT SAFETY INFORMATION
Read and understand tool labels and all of the operating instructions, safety precautions and
warnings in this manual before operating or maintaining this Stapler. Failure to follow warnings
could result in DEATH or SERIOUS INJURY.
Most accidents that result from the operation and maintenance of Staplers are caused by the failure to observe basic
safety rules and precautions. An accident can often be avoided by recognizing a potentially hazardous situation before it
occurs, and by observing appropriate safety procedures.
Basic safety precautions are outlined in the "SAFETY" section of this Manual and in the sections which contain the
operation and maintenance instructions.
Hazards that must be avoided to prevent bodily injury or machine damage are identified by DANGERS and WARNINGS on
the Stapler and in this Manual.
Never use this Stapler for applications other than those specified in this Manual.
DEFINITIONS OF SIGNAL WORDS
DANGER indicates an imminently hazardous situation, which if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation, which if not avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation, which if not avoided, may result in minor or moderate injury, or may
cause machine damage.
NOTE emphasizes essential information.

4
SAFETY
IMPORTANT SAFETY INSTRUCTIONS FOR USING STAPLERS
DANGER
1. OPERATORS AND OTHERS IN WORK AREA MUST WEAR SAFETY GLASSES WITH SIDE SHIELDS.
• Never use oxygen, combustible gases or any other bottled gases as a power source for the Sta-
pler.
• Use of the above gases is dangerous, as the Stapler will explode.
• Use only clean, dry, regulated compressed air.
• When operating the Stapler, always wear eye safety glasses with side shields, and make sure
others in the work area wear safety glasses, too.
• Safety glasses must conform to the requirements of American National Standards Institute,
ANSI Z87.1 and provide protection against flying particles both from the front and side.
• The employer must enforce the use of safety glasses by the Stapler operator and others in work
area.
WARNING
3. NEVER POINT TOOL AT YOURSELF OR OTHERS IN WORK AREA.
• Always assume the Stapler contains fasteners.
• Never point the Stapler at yourself, toward yourself or others whether it contains fasteners or
not.
• If fasteners are mistakenly driven, it can lead to severe injuries.
• Never engage in horseplay with the Stapler.
• Respect the Stapler as a working implement.
4. KEEP FINGERS AWAY FROM TRIGGER WHEN NOT DRIVING STAPLES TO AVOID ACCIDENTAL FIRING.
• Never carry the Stapler with finger on trigger since you could drive a fastener unintentionally and injure yourself or
someone else.
• Always carry the Stapler by the handle only.
5. CHOICE OF TRIGGERING METHOD IS IMPORTANT.
• Read and understand section titled “METHODS OF OPERATION.” (page 12)
6. DO NOT EXCEED 120 psi. (6.9 bar 8.4 kgf/cm2)
7. ALWAYS WEAR EAR AND HEAD PROTECTION.
• Always wear ear protection to protect your ears from loud noise.
• Always wear head protection conforming to ANSI Z89.1-1986 protect your head from flying objects.
2. NEVER USE OXYGEN OR OTHER BOTTLED GASES. EXPLOSION MAY OCCUR.
READ ALL INSTRUCTIONS
• Do not exceed maximum recommended air pressure 120 psi
(6.9 bar 8.4 kgf/cm2)
• Never connect the Stapler to pressure which potentially exceeds 200
psi (13.7 bar 14 kgf/cm2) as the Stapler can burst.
120psi 120psi

5
SAFETY — Continued
WARNING
8. STORE STAPLER PROPERLY.
When not in use, the Stapler should be stored in a dry
place. Keep out of reach of children. Lock the storage area.
9. KEEP WORK AREA CLEAN.
Cluttered areas invite injuries. Clear all work areas of un-
necessary Staplers, debris, furniture, etc.
10. NEVER USE IN PRESENCE OF FLAMMABLE
LIQUIDS OR GASES.
The Stapler produces sparks during operation. Never use
the Stapler in sites containing lacquer, paint, benzine, thin-
ner, gasoline, gases, adhesive agents, and other materials
which are combustible or explosive.
11. KEEP VISITORS AWAY.
Do not let visitors handle the Stapler. All visitors should be
kept away from work area.
12. DRESS PROPERLY.
Do not wear loose clothing or jewelry as they can be
caught in moving parts. Rubber gloves and nonskid foot-
wear are recommended when working indoors. Wear pro-
tective hair covering to contain long hair.
13. NEVER USE NON RELIEVING COUPLER ON
STAPLER.
If a non relieving coupler is used on the Stapler, the Stapler
can remain charged with air after disconnecting and thus
will be able to drive a Staple even after disconnecting. The
Stapler and air hose must have a hose coupling such that
all pressure is removed from the Stapler when the coupling
joint is disconnected.
14. CHECK PUSH LEVER BEFORE USE.
Make sure the push lever operates properly. (The push
lever may be called "safety".) Never use the Stapler unless
the push lever is operating properly., otherwise the Stapler
could drive a fastener unexpectedly,. Do not tamper with
or remove the push lever, otherwise the push lever be-
comes inoperable.
15. KEEP ALL SCREWS AND COVERS TIGHTLY IN
PLACE.
Keep all screws and covers tightly mounted. Check their
condition periodically. Never use the Stapler if parts are
missing or damaged.
16. DO NOT LOAD FASTENERS WITH TRIGGER
PULLED OR PUSH LEVER DEPRESSED.
When loading fasteners into the Stapler or when connect-
ing the air hose,
1) do not pull the trigger;
2) do not depress the push lever; and
3) keep the Stapler pointed downward.
17.KEEP FACE, HANDS AND FEET AWAY FROM DIS-
CHARGE AREA DURING USE.
Never place your face, hands or feet closer than 8 inches
(200 mm) from discharge area. A serious injury can result if
the Staples are deflected by the work piece, or are driven
away from the point of entry.
18. PLACE STAPLER PROPERLY ON WORKPIECE.
Do not drive fasteners on top of other fasteners or with
the Stapler at too steep of an angle; the Staples can rico-
chet and hurt someone.
19. BE CAREFUL OF DOUBLE FIRE DUE TO RECOIL.
If the push lever is unintentionally allowed to recontact the
work piece following recoil, an unwanted fastener may be
driven.
In order to avoid an unlikely double fire,
1) Do not push the Stapler on the work piece with strong
force;
2) Take the Stapler completely away from the work piece
using recoil, and keep the push lever away from the
work piece until the next desirable shot; and
3) Pull the trigger and release it QUICKLY when performing
intermittent operation.
20. DO NOT DRIVE STAPLES INTO THIN BOARDS OR NEAR
CORNERS AND EDGES OF WORK PIECE.
The Staples can be driven through or away from the work
piece and hit someone.
21. NEVER DRIVE STAPLES FROM BOTH SIDES OF A WALL
AT THE SAME TIME.
The Staples can be driven into and through the wall and hit
a person on the opposite side.
22. CHECK FOR LIVE WIRES.
Avoid the risk of severe electrical shock by checking for live
electrical wires that may be hidden by walls, floors or ceil-
ings. Turn off the breaker switch to ensure there are no
live wires.
23. NEVER CARRY STAPLER BY HOSE.

6
SAFETY — Continued
WARNING
24 . DO NOT OVERREACH.
Keep proper footing and balance at all times.
25. NEVER USE STAPLER WHICH IS DEFECTIVE OR OPER-
ATING ABNORMALLY.
If the Stapler appears to be operating unusually, making
strange noises, or otherwise appears defective, stop using
it immediately and arrange for repairs by a PNI authorized
service center.
26. DO NOT DISCONNECT AIR HOSE FROM STAPLER WITH
FINGER ON TRIGGER.
The Stapler can operate when re-connected to an air sup-
ply.
27. DISCONNECT AIR HOSE FROM STAPLER WHEN:
1) Doing maintenance and inspection;
2) Loading fasteners;
3) Clearing a jam;
4) It is not in use;
5) Leaving work area;
6) Moving it to another location;
7) Handing it to another person; and
8) Adjusting the knobs.
Never attempt to clear a jam or repair the Stapler unless
you have disconnected air hose from the Stapler and re-
moved all remaining Staples from the Stapler. The Stapler
should never be left unattended since people who are not
familiar with the Stapler might handle it and injure them-
selves.
28. STAY ALERT.
Watch what you are doing. Use common sense. Do not
operate the Stapler when you are tired. The Stapler should
never be used by you if you are under the influence of al-
cohol, drugs or medication that makes you drowsy.
29. HANDLE STAPLER CORRECTLY.
Operate the Stapler according to the Manual. Never allow
the Stapler to be operated by children, individuals unfamil-
iar with its operation or unauthorized personnel.
30. NEVER USE STAPLER FOR APPLICATIONS OTHER THAN
THOSE SPECIFIED IN THIS MANUAL.
31. HANDLE STAPLER CAREFULLY.
Because of high air pressure in the Stapler, cracks in the
surface are dangerous. To avoid this, do not drop the Sta-
pler or strike the Stapler against hard surfaces; and do not
scratch or engrave signs on the Stapler. Handle the Stapler
carefully.
32. MAINTAIN STAPLER WITH CARE.
Keep the Stapler clean and lubricated for better and safer
performance.
33. USE ONLY PARTS, ACCESSORIES OR STAPLES SUPPLIED
OR RECOMMENDED BY PNI.
Unauthorized parts, accessories, or Staples may void your
warranty and can lead to malfunction and resulting inju-
ries. Only service personnel trained by PNI, distributor or
employer shall repair the Stapler.
34. NEVER MODIFY OR ALTER A STAPLER.
Doing so may cause it to malfunction and personal injuries
may result.

7
SAFETY — Continued
EMPLOYER’S RESPONSIBILITIES
1. Ensure that this MANUAL is available to operators and
personnel performing maintenance.
2. Ensure that Staplers are used only when operators and
others in work area are wearing EYE PROTECTION.
3. Enforce the use of EYE PROTECTION by operators and
others in work area.
4. Keep Staplers in safe working order.
5. Maintain Staplers properly.
6. Ensure that Staplers which require repair are not further
used before repair.
SAVE THIS MANUAL AND
KEEP IT AVAILABLE FOR OTHERS!
WARNING
PORTA-NAILS, INC (PNI) is proud of the product it manufactures and warrants them to be free of
defects from workmanship and material for a period of 5 years from the date of original purchase. In
the unlikely event that a problem occurs, return the product to our factory freight prepaid and al-
lowed, so that a determination of the fault can be made. If the fault is determined to be defective
materials or workmanship, a no-charge replacement or repair will be made, at our discretion. The
product will be returned to you freight prepaid and allowed. Wear components including (Driver
Blade, O-rings, Bumper, Gaskets, Seals, Springs, Shoe Bases and Pads) are not covered under this
warranty. This warranty does not cover accidents, abuse or misuse and in no case will Porta-Nails,
Inc. be liable for incidental or consequential damages. No other warranty written or verbal is
authorized.
Returns for warranty service or repair must have a RMA number
prior to return. Contact Customer Service at 800-634-9281.
WARRANTY

8
OPERATION
NOTE:
The information contained in this Manual is designed to assist you in the safe operation of the Stapler.
Some illustrations in this Manual may show details or attachments that differ from those on your own
Stapler.
NAME OF PARTS
BODY
KNOBS
MAGAZINE
AIR FITTING
AIR PLUG
TRIGGER
SAFETY
ELEVATOR SHOE
FRONT GUIDE
CAP
EXHAUST DEFLECTOR
LATCH, MAGAZINE
FOOT
ADJUSTMENT AXLE
ELEVATOR SHOE
SPECIFICATION CHART
WARNING LABEL
HANDLE RUBBER GRIP

9
SPECIFICATIONS
Operating Pressure 70-120 psi (4.8-6.9 bar 5-8.4 kgf/cm2)
Actuation Trigger operated - Sequential
Dimensions
Length x Height x Width
10-1/8" x 9-5/8" x 2-5/16"
(257mm x 244mm x 59mm)
Weight 3.2 lbs (1.4 kg)
Staple Capacity 100 Staples
Air Consumption
.026 ft3/cycle @ 80 psi
(.74 ltr/cycle @ 5.5 bar)
(.74 ltr/cycle @ 5.6 kgf/cm2)
Air Inlet 1/4" NPT Thread
STAPLE SELECTION
WARNING
• Be sure to use only the genuine PNI staples for the
461A. The use of any other staples can result in
tool malfunction and/or staple breakdown, leading
to serious injuries.
ACCESSORIES
WARNING
• Accessories other than those shown below can
lead to malfunction and resulting injuries.
STANDARD ACCESSORIES
2. Safety Glasses 3. Wrench Set
NOTE: Accessories are subject to change without
any obligation on the part of PNI.
1. Carry Case
APPLICATIONS
• TONGUE AND GROOVE FLOORING
• MOISTURE BARRIER
• SUBFLOOR
The 461A Pneumatic Flooring Stapler, with the standard
shoe, drives 1", 1-1/2 to 1-9/16” Staples into the tongue
and groove flooring at a 45 degree angle. The orientation
of the Staple is as depicted above.
BEFORE OPERATION
Read over section titled "SAFETY" (pages 4 - 7)
Make sure of the following before operation.
Only Staples shown in the table below can be driven with
this Stapler.
.225" (5.71mm)
18 GAUGE 1/4” CROWN
STAPLE
MIN. MAX
1" (25mm)
.05” (1.27mm)
1-9/16” " (39mm)
WORKING ENVIRONMENT
WARNING
• No flammable gas, liquid or other flammable objects
at worksite.
• Clear the area of children or unauthorized
STAPLE APPLICATION T&G FLOORING
THICKNESS
1" STAPLE
1 1/2” - 1 9/16”
Staple
Angle fastener onto
5/8" - 3/4"
underlayment over
joist construction.
1/4", 5/16", 3/8", 7/16",
1/2”, 9/16”, 5/8
STAPLE APPLICATION CHART
1", 1-1/2” to
1-9/16” Staple
Moisture
Barrier
Subfloor
Tongue and Groove
Flooring
1. Carrying Case

10
3) Air hose
• Air hoses should have a minimum of 150 psi (10.4 bar 10.6
kgf/cm2) working pressure rating or 150 percent of the
maximum pressure that could be produced in the air system.
The supply hose should contain a fitting that will provide
"quick disconnecting" from the male plug on the Tool.
4) Hose Coupling
• This tool uses a free-flow connector plug, 1/4 NPT. The
inside diameter should be .200" (5mm) or larger. The fitting
must be capable of discharging tool air pressure when
disconnected from the air supply.
5) Air Consumption
• The model 461A requires 3.1 cfm of free air to operate at
the rate of 100 fasteners per minute, at 80 psi. Take the
actual rate at which the tool will be run to determine the
amount of air required. For instance, if your fastener usage
averages 50 fasteners per minute, you need 50% of the
tool’s cfm which is required to operate the tool at 100
fasteners per minute.
6) Operating Pressure
• 70 to 120 psi. Select the operating pressure within this
range for best Staple performance. DO NOT EXCEED THIS
RECOMMENDED OPERATING PRESSURE.
LUBRICATION
Frequent, but not excessive, lubrication is required for best
performance. Oil added through the air line connection will
lubricate the internal parts. Use Air Tool Lubricant, Mobil Velocite
#10, or equivalent. Do not use detergent oil or additives as these
lubricants will cause accelerated wear to the seals and piston
cushion in the Tool, resulting in poor Tool performance and
frequent Tool maintenance.
If no airline lubricator is used, add oil during use into the air
fitting on the Tool once or twice a day. Only a few drops of oil at
a time are necessary. Too much oil will only collect inside the
Tool and will be noticeable in the exhaust cycle.
COLD WEATHER CARE
For cold weather operation, near and below freezing, the
moisture in the air line may freeze and prevent Tool operation.
We recommend the use of WINTER FORMULA Air Tool lubricant
(NEW-MATIC Winter Formula or equivalent) or permanent
anti-freeze (ethylene glycol) as a cold weather lubricant.
CAUTION: Do not store Staplers in a cold weather environment to
prevent frost or ice formation on the Staplers operating valves
and mechanisms that could cause Stapler failure.
NOTE: Some commercial air line drying liquids are harmful to
O-rings and seals – do not use these low temperature air dryers
without checking compatibility.
• Do not operate the Stapler at high pressure without
Staples
CAUTION
WARNING
• Never connect Stapler to pressure which
potentially exceeds 200 psi (13.7 bar 14 kgf/cm2).
• Never use non relieving coupler on Stapler.
2) Filter-Regulator-Lubricator
• A pressure regulator with an operating pressure of
0-125 psi (0-8.6 bar 0-8.8 kgf/cm2) is required to control
the operating pressure for safe operation of this tool. Do not
connect this tool to air pressure which can potentially
exceed 200 psi as tool may fracture or burst, possibly
causing injury.
• Filter-Regulator-Lubricator units supply an optimum
condition for the Stapler and extend the Stapler life.
These units should always be used:
Filter—The filter removes moisture and dirt mixed in compressed
air. Drain daily unless fitted with an automatic drain. Keep the
filter clean by regular maintenance.
Regulator—The regulator controls the operating pressure for
safe operation of the Stapler. Inspect the regulator before
operation to be sure it operates properly.
Lubricator—The lubricator supplies an oil mist to the Stapler.
Inspect the lubricator before operation to be sure the supply of
lubricant is adequate. Use PNI pneumatic tool lubricant.
Stapler side
Lubricator
Filter
Regulator
1) Power Source
• Use only clean, dry, regulated compressed air as a power
source for this Stapler.
• Air compressors used to supply compressed air to this
Stapler must comply with the requirements of the latest
version of ANSI Standard B 19.3 "Safety Standard For
Compressors For Process Industries."
• Moisture or oil in the air compressor may accelerate wear
and corrosion in the Stapler.
• Drain daily.
Compressor side
AIR SUPPLY
DANGER
• NEVER use oxygen or other
bottled gases. Explosion may
occur.

11
TESTING THE STAPLER
DANGER
• Operators and others in
work area MUST wear safety
glasses with side shields
which conforms to ANSI
Z87.1
WARNING
• Never use Stapler unless push lever is working
Manufacturer recommends before each use, check all
Screws and Nuts to make sure they are tight and have not
"jarred loose" from vibration and use. (Shoe, Shoe Base
and Pad, Magazine, Magazine Retainer Bracket, Handle,
etc.).
Manufacturer recommends before each use, check the
Driver Blade tip for deformation & breakage to prevent
improper driving of Staples and/or to prevent damage to
the Stapler and Flooring.
Before actually beginning the stapling work, test the Sta-
pler by using the check list below.
Conduct the tests in the following order.
If abnormal operation occurs, stop using the Stapler and
contact a PNI authorized service center immediately.
1) Adjust the air pressure to 70psi (4.8 bar, 4.9 kgf/cm2)
Connect the air hose.
Do not load any staples in the Stapler.
The Stapler must not leak air.
2) Pull the safety trigger.
The Tool must not operate.
3) Remove the finger from the trigger and contact the
push lever.
The Tool must not operate.
4) First, pull the safety trigger. Next, contact the push
The Stapler must not operate.
5) First, contact the push lever. Next, pull the trigger.
The Stapler must operate.
ADJUSTING AIR PRESSURE
WARNING
DO NOT EXCEED 120 psi. (6.9 bar 8.4 kgf/cm2)
Adjust the air pressure at recommended operating pres-
sure 70 – 120 psi (4.9 – 6.9 bar 5 – 8.4 kgf/cm2) according
to the hardness of work piece.
The correct air pressure is the lowest pressure which will
do the job. Using the Stapler at a higher than required air
pressure unnecessarily over stresses the Stapler.
LOADING STAPLES
WARNING
When loading fasteners into the Tool,
1) Do not pull the trigger;
2) Do not depress push lever
1. DEPRESS MAGAZINE RELEASE LATCH.
2. PULL BACK MAGAZINE.
3. OPEN MAGAZINE FULLY.
4. INSERT FASTENERS, POINTS MUST BE AGAINST BOT-
TOM OF MAGAZINE.
5. PUSH MAGAZINE FORWARD. CONTINUE PUSHING
UNTIL LATCH IS ENGAGED.
120psi 120psi

12
STAPLER OPERATION
DANGER
• Operators and others in
work area MUST wear safety
glasses with side shields
which conforms to ANSI
Z87.1 specifications.
Read section titled "SAFETY" (pages 4-7)
WARNING
• Keep fingers AWAY from trigger when not driving Staples to
avoid accidental operation.
• Never place your face, hands or feet closer than 8 inches
(200 mm) from discharge area when using. The Stapler may
bounce from the recoil of driving a Staple and an unwanted
second Staple may be driven possibly causing injury.
• Check operation of the safety mechanism frequently. Do not
use the Stapler if the safety is not working correctly as acci-
dental driving of a Staple may result. Do not interfere with
the proper operation of the safety mechanism.
• Never clamp or tape the trigger or contact trip in an
actuated position.
• Do not drive Staples on top of other Staples or with Stapler
at too steep of an angle; Staples can ricochet and hurt some-
one.
• Do not drive Staples into thin boards or near corners and
edges of work piece. Staples can be driven through or away
from work piece and hit someone.
• Do not overdrive Staples. NWFA (National Wood Flooring
Association) states that one reason for split tongues is over-
driving.
• Never use Stapler which is defective or operating abnor-
mally.
• Do not use Stapler as a hammer.
• Disconnect air hose from Stapler when:
1) It is not in use;
2) Leaving work area;
3) Moving it to another location; and
4) Handing it to another person.
• Wear safety glasses and safety shoes for protection against
foreign objects.
• Use only Staples from PNI.
• Air supply hoses should have a minimum working pressure
rating of 150 psi or 150 percent of the maximum pressure
produced in the power source, whichever is higher.
• Check all hoses before connecting to ensure that they are
free from dirt, grit, or particles that could alter the
performance of the Stapler.
• An airline Filter and In-Line Air Regulator adjustable to 125
psi max are required.
• NEVER use a defective Stapler. Replace worn or damaged
parts immediately. Be sure that the Safety Trigger and
operating mechanisms operate correctly and that all screws
and seals are securely tightened at all times.
• NEVER point Stapler at
yourself or others in work
area.
METHODS OF OPERATION
The Stapler is equipped with the push lever and does not
operate unless the push lever is depressed (upward posi-
tion).
SEQUENTIAL TRIP SAFETY OPERATION
The model 461A Flooring Stapler operates on a sequential
trip system. The sequential trip system requires the opera-
tor to hold the Tool against the work before pulling the
trigger. This makes accurate fastener placement easier.
The sequential trip allows exact fastener location without
the possibility of driving a second fastener on recoil.
SEQUENTIAL TRIP OPERATION:
1) Press the contact trip against the work surface, without
touching the trigger.
THE TOOL MUST NOT CYCLE.
2) Hold the Tool off the work surface and pull the trigger.
THE TOOL MUST NOT CYCLE.
Release the trigger. The trigger must return to the trigger
stop on the frame
3) Pull the trigger and press the contact trip against the
work surface.
THE TOOL MUST NOT CYCLE.
4) With finger off the trigger, press the contact trip against
the work surface. Pull the trigger.
THE TOOL MUST CYCLE.
WARNING
• Keep your finger off the trigger except during sta-
pling operation, because serious injury could result
if the push lever accidentally contacts you or others
in the work area.
• Keep hands and body away from the discharge area.
The Stapler may bounce from recoil of driving a fas-
tener and unwanted subsequent fastener may be
driven, possibly causing injury.
• Some types of loaded Staples can spark out of the
muzzle during a driving operation.

13
FASTENER POSITIONING ADJUSTMENT
The fastener position can be adjusted to accommodate 1/4" - 5/8" thicknesses of flooring by way of the adjustment knobs
located on the positioning shoe. The shoe adjustment feature provides close control of the fastener positioning to reduce
occurrence of split tongues or dimples in the flooring surface.
First set the air pressure for consistent drive in the specific work as described on page 11, then use the shoe adjustment
knobs to set the desired position of drive. The fastener should be positioned so that it enters the vertical face of the flooring
at the point where the tongue meets the vertical face.
TO ADJUST THE TOOL TO THE FLOORING:
1. Loosen both Knobs until the Foot moves freely.
2. Position the foot and to engage the Nose with the Tongue of Flooring and retighten knobs as shown above.
3. Adjust the Front Guide “Elevator Shoe” to the subfloor by turning the adjustment AXLE to raise or lower the “elevator
Shoe” so the tool is balanced.
Note: periodically check the Knobs to ensure that they are tight during use.
**Important: Test the tool on a scrap piece of flooring to ensure proper staple placement and compatibility.
ADJUSTING THE STAPLING DEPTH
Air volume is as important as air pressure. The air volume supplied to the tool may be inadequate because of undersized
fittings and hoses or from the effects of dirt and water in the system. Restricted air flow will prevent the tool from receiving
an adequate volume of air, even though the pressure reading is high. The results will be slow operation, jamming, misfeeds
or reduced driving power. Before evaluating tool problems for these symptoms, trace the air supply from the tool to the
supply source for restrictive connectors, swivel fittings, low points containing water and anything else that would prevent
full volume flow of air to the tool.
Floor
Staple
• Air pressure too low.
• Staple crown above tongue.
• Increase air pressure.
• Air pressure too high
• Staple crown below tongue.
• Lower air pressure.
• Correct air pressure
• Staple just below surface
FRONTGUIDE
ELEVATOR SHOE
1.
2.
3.
ELEVATOR SHOE
ADJUSTING AXLE

14
MAINTENANCE
NOTE:
The information contained in this Manual is designed to assist you in the safe maintenance of the Stapler.
Some illustrations in this Manual may show details or attachments that differ from those on your own
Stapler.
MAINTENANCE AND INSPECTION
Read section titled "SAFETY" (page 4-7)
WARNING
• Disconnect air hose and remove all Staples from
Stapler when:
1) doing maintenance and inspection; and
2) clearing a jam.
1) Inspecting the Magazine
• DISCONNECT THE AIR HOSE
• Clean the magazine. Remove dust or wooden chips
which may have accumulated in the magazine.
2) Storing
• When not in use for an extended period, apply a thin
coat of the lubricant to the steel parts to avoid rust.
• Do not store the Stapler in a cold weather environ-
ment. When not in use, the Stapler should be stored in
a warm and dry place.
• Keep out of reach of children.
3) Warning Label
• Change the WARNING LABEL if missing or damaged. A
new WARNING LABEL is available from a PNI Author-
ized Service Center.
4) Maintenance Chart (see page 15)
5) Operator Troubleshooting (see page 16)
CAUTION
Repair, modification and inspection of PNI Staplers must
be carried out by PNI or it's Authorized Service Center.
This Parts List will be helpful if presented with the Sta-
pler to the Hitachi Authorized Service Center when re-
questing repair or other maintenance. In the operation
and maintenance of power Staplers, the safety regula-
tions and standards prescribed in each country must be
observed.
MODIFICATIONS
Porta-Nails’ Tools are constantly being improved and
modified to incorporate the latest technological advance-
ments. Accordingly, some parts (i.e.: code numbers and/or
design) may be changed without prior notice.
SERVICE AND REPAIRS
WARNING
• Only service personnel trained by PNI, distributor or
employer shall repair the Stapler.
• Use only PNI parts supplied or recommended by
PNI for repair.
All quality Staplers will eventually require servicing or
replacement of parts because of wear from normal use.
In order to achieve the optimal performance of the 461A
Pneumatic Flooring Stapler preventative maintenance is
recommended.
NOTE:
Specifications are subject to change without any obliga-
tion on the part of PNI.
WARNING LABEL

15
ACTION WHY HOW
Keep lubricator filled. Keep the Tool lubricated. Fill with pneumatic tool
lubricant.
Clean filter element - then
blow air through filter in
direction opposite to nor-
mal flow.
Prevent clogging of filter with dirt. Follow manufacturer's instruc-
tions.
Clean magazine and feeder
mechanism. Prevent a jam. Blow clean daily.
Keep safety trigger working
properly.
Promote operator safety and efficient Tool
operation. Blow clean daily.
Lubricate the Tool after use. Extend the life of the Tool. Supply 5-10 drops of lubricant
into the Tool.
Drain air compressor. Keep the Tool operating properly. Open petcock on air compressor
tank.
Drain air line filter daily Prevent accumulation of moisture and dirt. Open manual petcock.
MAINTENANCE CHART

16
OPERATOR TROUBLESHOOTING
Most minor problems can be resolved quickly and easily using the table below.
If problems persist, contact a PNI authorized service center for assistance.
Trigger valve housing leaks air O-ring cut or cracked Contact PNI for replacement.
Trigger valve stem leaks air O-ring/seals cut or cracked Contact PNI for replacement.
Frame/nose leaks air
O-ring or gasket is cut or cracked Contact PNI for replacement.
Bumper is cracked / worn Contact PNI for replacement.
Frame/cap leaks air
Damaged gasket or seal Contact PNI for replacement.
Cracked / worn head valve Contact PNI for replacement.
Loose cap screws Tighten and recheck.
Failure to cycle
Air supply restriction Check air supply equipment
Worn head valve Contact PNI for replacement.
Broken cylinder cap spring Contact PNI for replacement.
Head valve stuck in cap Contact PNI for replacement.
Lack of power; slow to cycle
Broken cylinder cap spring Contact PNI for replacement.
Rings / seals cut or cracked Contact PNI for replacement.
Exhaust blocked Contact PNI for replacement.
Trigger assembly worn / leaks Contact PNI for replacement.
Dirt/tar build up on driver Contact PNI for replacement.
Cylinder sleeve not seated correctly on bottom bumper Contact PNI for replacement.
Air pressure too low Check air supply equipment
Skipping Staples;
intermittent feed
Worn bumper Contact PNI for replacement.
Tar/dirt in driver channel Contact PNI for replacement.
Air restriction/inadequate air flow through quick disconnect socket and plug Replace quick disconnect fittings
Worn piston ring Contact PNI for replacement.
Damaged pusher spring Contact PNI for replacement.
Low air pressure Check air supply equipment
Loose magazine nose screws Tighten all screws
Staples too short for Stapler Use only recommended Staples
Bent Staples Discontinue use of these Staples
Wrong size Staples Use only recommended Staples
Leaking head cap gasket Contact PNI for replacement.
Trigger valve O-ring cut / worn Contact PNI for replacement.
Broken/chipped driver Contact PNI for replacement.
Dry/dirty magazine Clean / lubricate; Use Air Tool
Lubricant
Worn magazine Contact PNI for replacement.
Staples jam in Stapler
Driver channel worn Contact PNI for replacement.
Wrong size Staples Use only recommended Staples
Bent Staples Discontinue use of these Staples
Loose magazine nose screws Tighten all screws
Broken/chipped driver Contact PNI for replacement.
PROBLEM OR QUESTION CAUSE CORRECTIVE ACTION

17
PRODUCT DIAGRAM AND PARTS LISTING

18
EXPLODED VIEW
433 434 432
101
119 102
109
103 104
105
106
107
108
A
111 112 113
115
114
116
117
118
A
B
401
426
110
402
427
428
429
401
431
430
403
419
405
404
425
422
408
407 409
420
421
208
211
417
418
301 302
303 304 305
412
414
413
416
424
415
411
201
202
203 204
205 205A 206
207
213
209
210
212
B
C
C

19
ITEM NO. PART NO. DESCRIPTION
101 46401
DEFLECTOR
102 46402
CAP
103 46403
SEAL
104 46404 COMPRESSION
SPRING
105 46405
0-RING
106 46406 0-RING
107 46407 HD.VALVE PISTON
108 46408 O-RING
109 46409 CYLINDER CAP
SEAL
110 46410 BOLT ASSY
111 46411 PISTON RING
112 46412 DRIVER UNIT
113 46413 O-RING
114 46414 O-RING
115 46415 CYLINDER
116 46416 CYLINDER RING
117 46417 BUMPER
118 46418 JOINT GUIDE
119 46419 BOLT ASSY
201 46420 O-RING
202 46421 TRIGGER VALVE
HEAD
203 46422 SPRING
204 46423 PLUNGER
205 46424 O-RING
205A 46425 O-RING
206 46426 O-RING
207 46427 PLUNGER CAP
208 46428 SPRING PIN
209 46429 SECONDARY TRIG-
GER
210 42430 TRIGGER
211 46431 SPRING PIN
212 46432 SPRING PIN
213 46433 SPRING
301 46434 GUN BODY UNIT
302 46435 END CAP
303 46436 O-RING
304 46437 AIR PLUG CAP
305 46438 AIR PLUG
401 46439 SCREW
402 46440 FIXED SUPPORT
403 46441 RELIEF PLATE
404 46442 FOOT—PROTECTIVE
CUSHION
405 46443 COUNTER SUNK
SCREW
406 46444 DRIVER CUIDE
COVER
ITEM NO. PART NO. DESCRIPTION
407 46445 GASKET
408 46446 PUSHER
409 46447 SHAFT
410 46448 PUSHER SPRING
411 46449 REAR PLATE
412 46450 LATCH
413 46451 LATCH PIN
414 46452 SPRING
415 46453 STOPPER
416 46454 E-RING
417 46455 HEX.SOC.HD.BOLT
418 46456 LOCK NUT
419 46457 SAFETY
420 46458 LATCH SPRING
421 46459 SAFETY GUIDE
422 46460 MAXAZINE A
423 46461 MAGAZINE B
424 46462 TAP BOLT
425 46463 HAND UNIT
426 46464 BOLT ASSY
427 46465 ELEVATOR SHOE
428 46466 ADJUST AXLE -
ELEV. SHOE
429 46467 RING
430 46468 BALL
431 46469 POSITIONING
SPRING
432 46470 CARRY CASE
433 46471 SAFETY GLASSES
434 46472 WRENCH SET
MODEL 461A - PARTS LISTING

20
PORTA-NAILS, INC.
4235 HIGHWAY 421 NORTH
CURRIE, NORTH CAROLINA 28435
Toll Free: : 800-634-9281
Web: www.porta-nails.com
MANUAL CODE # 46473
PRINT DATE: 11/30/09