Central Pneumatic 93909 Installation manual

FRAMING NAILER
21° ANGLE / 10 GAUGE
97511
93909
SET UP AND OPERATING INSTRUCTIONS
Distributed exclusively by Harbor Freight Tools®.
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright©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.

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SPECIFICATIONS
Nail Size .113” to .131” Thick Shank, 2” to 3-1/2” Long; 21° Full Head
Magazine Capacity 60 Nails
Operating PSI 70 to 125 PSI *
Required Average Air Flow 3 - 3.5 CFM at 90 PSI
Accessories 4 Hex wrenches, safety goggles, oil dropper
Features Full Sequential Safety Trip Mechanism, 360° Exhaust
Flow Adjustment, Soft Rubber Grip, 1/4” NPT (18 NPT) Air
Inlet with Screen, Adjustable Depth Drive
* The air pressure setting must not exceed job site regulations/restrictions. The
air pressure setting must not exceed 90 PSI when being used with work pieces
that have a thickness of less than 1-3/4”.
Save This Manual
You will need the manual for the safety warnings and precautions, assembly
instructions, operating and maintenance procedures, parts list and diagram. Keep your
invoice with this manual. Write the invoice number on the inside of the front cover. Keep
the manual and invoice in a safe and dry place for future reference.
Safety Warnings and Precautions
WARNING: When using tool, basic safety precautions should always be
followed to reduce the risk of personal injury and damage to equipment.
Read all instructions before using this tool!
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use machines or power tools in damp or
wet locations. Do not expose to rain. Keep work area well lit. Do not use electrically
powered tools in the presence of ammable gases or liquids.
3. Keep children away. Children must never be allowed in the work area. Do not let
them handle machines, tools, extension cords, or air hoses.
4. Store idle equipment. When not in use, tools must be stored in a dry location to
inhibit rust. Always lock up tools and keep out of reach of children.
5. Use the right tool for the job. Do not attempt to force a small tool or attachment
to do the work of a larger industrial tool. There are certain applications for which
this tool was designed. It will do the job better and more safely at the rate for which
it was intended. Do not modify this tool and do not use this tool for a purpose for
which it was not intended.
6. Dress properly. Do not wear loose clothing or jewelry as they can be caught in
moving parts. Protective, electrically non-conductive clothes and non-skid footwear
are recommended when working. Wear restrictive hair covering to contain long hair.
REV 08j; 08l

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7. Do not overreach. Keep proper footing and balance at all times. Do not reach over
or across running machines or air hoses.
8. Use eye and ear protection. Always wear ANSI approved impact safety
goggles and appropriate hearing protection. Wear a full face shield if you are
producing metal lings or wood chips. Wear an ANSI approved dust mask
or respirator when working around metal, wood, and chemical dusts and
mists. Other people in the work area must also wear ANSI approved impact safety
goggles.
9. Maintain tools with care. Keep tools clean for better and safer performance. Follow
instructions for lubricating and changing accessories. Inspect tool cords and air
hoses periodically and, if damaged, have them repaired by an authorized technician.
The handle must be kept clean, dry, and free from oil and grease at all times. Do
not operate a tool if any portion of the tool’s operating controls are inoperable,
disconnected, altered or not working properly.
10. Disconnect Air Hose and release any built-up air pressure. Never service the
Nailer, clear jams, or disassemble with the air hose attached. Always release any
built-up air even after disconnecting hose. Disconnect the Nailer when not in use.
11. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are
removed from the tool or machine work surface before attaching to an air source.
12. Avoid unintentional starting. Be sure the trigger is in the Off position when not
in use and before plugging in. Do not carry any tool with your nger on the trigger,
whether it is attached to an air source or not. Do not point the tool towards yourself
or anyone whether it contains fasteners or not.
13. Stay alert. Watch what you are doing, use common sense. Do not operate any tool
when you are tired.
14. Check for damaged parts. Before using any tool, any part that appears damaged
should be carefully checked to determine that it will operate properly and perform
its intended function. Check for alignment and binding of moving parts; any broken
parts or mounting xtures; and any other condition that may affect proper operation.
Any part that is damaged should be properly repaired or replaced by a qualied
technician. Do not use the tool if the trigger does not operate properly.
15. Guard against electric shock. Prevent body contact with grounded surfaces such
as pipes, radiators, ranges, and refrigerator enclosures.
16. Replacement parts and accessories. This product is to be repaired and serviced
only by a qualified technician. When this product is serviced, only identical
replacement parts should be used. Use of any other parts will void the warranty. Only
use accessories intended for use with this tool. Approved accessories are available
from Harbor Freight Tools.
17. Do not operate tool if under the inuence of alcohol or drugs. Read warning
labels if taking prescription medicine to determine if your judgement or reexes are

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93909 For Technical Questions, Please Call 1-800-444-3353 Page 4
impaired while taking drugs. If there is any doubt, do not operate the tool.
18. Use proper size and type extension cord. If an extension cord is required, it must
be of the proper size and type to supply the correct current to the compressor without
heating up. Otherwise, the extension cord could melt and catch re, or cause electrical
damage to the tool. Check your air compressor’s manual for the appropriate size cord.
It is also possible that the use of an extension cord may cause your circuit breaker to
trip or your panel fuse to break. If this happens, either use the compressor without
an extension cord or nd a larger amperage circuit to use.
19. Maintenance. The maintenance outlined in the maintenance section should be
performed regularly. For your safety, this product should be serviced or repaired
regularly only by a qualied technician.
20. Compressed air only. Never use combustible gas as a power source.
21. Do not load nails with the trigger or safety depressed. Unintentional
ring may occur. Do not load nails when the air hose is connected to the
tool. Always assume that the tool contains fasteners.
22. Disconnect air supply before loading Nailer. Before reloading (or making any
adjustments to) the Nailer make sure that the compressed air is disconnected.
23. Fire nails into an appropriate work surface only. Do not attempt to re nails into
surfaces too hard to penetrate. Do not drive nails on top of other nails, or at too steep
of an angle. Nails can ricochet causing personal injury. Never re the Nailer into the
air, or point it toward yourself or another person. Always wear ANSI approved safety
goggles during use, maintenance, and reloading.
24. Do not re nails too close to the edge of a workpiece. They may split the workpiece
and y free, causing personal injury.
25. Take caution as some woods contain preservatives such as copper chromium
arsenate (CCA) which can be toxic. When or nailing these materials extra care
should be taken to avoid inhalation and minimize skin contact.
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities, contain chemicals known [to the State of California] to
cause cancer, birth defects or other reproductive harm.
Some examples of these chemicals are:
• Lead from lead-based paints
• Crystalline silica from bricks and cement or other masonry products
• Arsenic and chromium from chemically treated lumber
(California Health & Safety Code § 25249.5, et seq. )
26. Stay within air pressure capacity.Never operate the Nailer above 125 PSI.
27. Hold tool away from head and body. During operation the Nailer may kick back
causing injury.
28. Transport Nailer safely. Always disconnect air supply when moving the tool in the

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UNPACKING
When unpacking, check to make sure all the parts shown on the Parts List on page
11 are included. If any parts are missing or broken, please call Harbor Freight Tools at
the number shown on the cover of this manual as soon as possible.
OPERATION
For best service incorporate an oiler, regulator, and inline lter, as shown above.
Hoses, couplers, oilers, regulators, and lters are all available at Harbor Freight Tools.
1. You will need to prepare a 1/4” air connector (sold separately) to connect to the air
inlet on the Nailer. First, wrap the 1/4” air connector (not included) with pipe thread
seal tape before connecting to a 3/8” ID Air Source Hose (not included). Connect
the Air Source Hose to the Air Plug (79).
Note: If you are not using an automatic oiler system, before operation, add a few drops
of Pneumatic Tool Oil to the airline connection. Add a few drops more after each
hour of continual use.
2. Set the air pressure on your compressor to 70 - 125 PSI. Do not exceed the maximum
air pressure of 125 PSI.
3. Check the air connection for leaks.
Note: The amount of air pressure effects how deep the nails will be driven. It is
suggested that you experiment on scrap material.
4. Check the air connection for leaks and disconnect the Nailer.
workplace. Carry the tool by the handle and avoid contact with the trigger.
Note: Performance of the compressor (if powered by line voltage) may vary depending
on variations in local line voltage. Extension cord usage may also affect tool
performance.
Warning: The warnings, cautions, and instructions discussed in this instruction
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.

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Testing The Full Sequential Safety Trip Mechanism
Warning: Even though the nailer should be empty during this procedure, ALWAYS
point the Nailer at a piece of scrap wood when testing.
1. The Nailer should not re if the nose is not depressed against the workpiece. This
tool has a full sequential safety trip mechanism, which is designed to reduce the
risk of inadvertent ring. The tool should only re if the Safety (38) is resting on the
workpiece prior to pulling the Trigger (44).
2. Disconnect the tool from the air supply.
3. Empty the magazine of nails or staples.
4. Check that the Trigger (44) and the Safety (38) on the nose of the tool, move
freely, without sticking.
5. Connect the air supply to the tool at the Air Plug (79) and set at the recommended
70-120 PSI, and not over the maximum 125 PSI.
6. Test the tool by depressing the Safety (38) on the nose of the tool against the
workpiece without pulling the Trigger (44). The tool must not cycle (re). If it
cycles (res), stop immediately and take the tool to a qualied service technician
for repair.
7. Hold the tool away, or off of the workpiece. The Safety (38) or nose of the tool
should return to its original position. Squeeze the Trigger (44). The tool must not
cycle (re). If it cycles (res), stop immediately and take the tool to a qualied
service technician.
8. Depress the Safety (38) against the workpiece and squeeze the Trigger (44). The
tool must cycle (re) once only. Release the trigger and squeeze it again. The
tool must not cycle (re). With the Trigger held, carefully lift the nailer and press
it against the workpiece again. The tool must not cycle (re). If it fails to act in
the manner explained in bold, have it repaired by a qualied service technician.
Loading Nails
ALWAYS WEAR ANSI APPROVED 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.
Warning! Make sure the Nailer is not attached to the air hose whenever loading the tool.
1. CAUTION: Make sure to keep the Framing Nailer pointed away from you and
others at all times. Always disconnect the Framing Nailer from its air sup-
ply before loading nails. Do not load nails with the Trigger (44), or Bracket B
(35), or Safety (38) depressed. (See Figure B)
2. Pull the Feeder Shoe (52) all the way to the rear, until it latches. (See Figure B.)
REV 08h

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OPERATION
NOTE: For additional references to the parts listed below, refer to the Assembly
Diagram on page 11.
1. Adjust the Exhaust Cover (4) to direct exhaust as desired.
2. To re a nail, place the nose of the Nailer on the workpiece. The Nailer should
not re if the Safety (38) is not depressed. Once the Safety is depressed,
gently and briey squeeze the Trigger once to re one nail. Release
the Trigger. Do not re repeatedly; nails could bounce off on one another,
damaging the workpiece or causing personal injury.
3. With the nose of the Nailer on the workpiece, squeeze the Trigger again to
re another nail. Continue ring nails as needed.
4. When the work is completed, disconnect the air supply and remove the nails from
the nailer.
3. Orient a strip of nails with the points down, and drop the strip of nails into the
Magazine (71). (See Figure C.)
4. Slide the strip of nails forward in the Magazine (71). NOTE: The Magazine will
hold 60, 10 gauge nails. (See Figure C.)
5. Unlatch the Feeder Shoe (52), and allow the Feeder Shoe to slide forward against
the strip of nails. (See Figure C.)
Loading Nails (continued)

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To Adjust The Depth To Which A Nail Is Driven
1. The depth to which a nail is driven is controlled by the Safety (38).
(See Figures B and C).
2. To adjust the depth of drive, loosen the Screw (37). Slide Safety (38) up or down
to the desired position. Then, re-tighten the Screw. Note: Sliding Safety (38)
upward increases the depth of drive. Sliding Safety downward decreases the
depth of drive. (See Figure C).
3. Test re a nail, and check its depth of drive. Repeat Step #2 as necessary to
achieve the desired depth of drive. (See Figure C).
EXHAUST COVER (4)
NAILS
(10 GAUGE)
(2-3/16” TO 3-1/2” LONG)
FEEDER SHOE
(52)
NOSE (29)
BRACKET A
(35)
SAFETY (38)
TRIGGER
(44)
FIGURE B
NOSE (29)
QUICK COUPLER &
AIR SUPPLY HOSE
(NOT INCLUDED)

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SAFETY
(38)
RUBBER COVER (39)
SCREW (37)
FIGURE C
Anytime any maintenance or repairs are done (including clearing jams), FIRST:
1. Disconnect the Nailer from the air hose.
2. Empty the Magazine (71) completely.
3. Attempt to re the Nailer into a piece of scrap wood to ensure that it is disconnected
and is incapable of ring any brads.
4. Always leave the Magazine (71) open during maintenance. The Magazine is
spring-loaded and may cause parts or a nail to y out of the Nailer.
Clearing Jams
1. Disconnect tool from air hose. Always re the trigger repeatedly to make sure all
of the air is expended from the Nailer.
2. If a nail is jammed in the discharge area, simply remove it with pliers.
3. If a nail is jammed in the magazine, pull the Feeder Shoe (52) all the way back to
the engaged position. Using a screwdriver, attempt to release the jammed nail by
probing either or all of the openings in the magazine (see Figure D ) to release the
nail. Pull out the jammed nail and the remainder of the nail strip that is still in the
magazine. Dispose of the remaining nail strip; it may be bent or damaged in some
other way. Reload the magazine with a new nail strip. Pull back on the Feeder
Shoe (52) and with your other hand, pull the tab down on the Lock (67), and guide
the Feeder Shoe (52) back into position. If you are unable to clear the nail jam
using the method prescribed above, the tool should be taken to a qualied service
technician for proper servicing.

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INSPECTION, MAINTENANCE, AND CLEANING
1. CAUTION: Always disconnect the Framing Nailer from its compressed air supply
source before performing any inspection, maintenance, or cleaning.
2. BEFORE EACH USE, inspect the general condition of the Framing Nailer.
Check for loose screws, misalignment or binding of moving parts, jammed nails,
cracked or broken parts, damaged air supply hose, and any other condition that
may affect the safe operation of this tool. If abnormal noise or vibration occurs,
immediately disconnect the Framing Nailer from its compressed air supply source
and have the problem corrected before further use.
Do not use damaged equipment.
3. PERIODICALLY, use a premium quality, lightweight oil to lubricate all moving
parts.
4. When necessary, wipe with a damp cloth, using a mild detergent or mild solvent.
5. When storing, keep the Framing Nailer in its Carrying Case (80) or covered with
a clean cloth.
FIGURE D
Probe in these areas with a
screwdriver to release jammed nails.
Anytime any maintenance or repairs are done (including clearing jams), FIRST:
1. Disconnect the Nailer from the air hose.
2. Empty the Magazine (71) completely.
3. Attempt to re the Nailer into a piece of scrap wood to ensure that it is disconnected
and is incapable of ring any brads.
4. Always leave the Magazine (71) open during maintenance. The Magazine is
spring-loaded and may cause parts or a nail to y out of the Nailer.

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PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY
DIAGRAM IN THIS MANUALAS 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.
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 ac-
tivity, 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 com-
plaint must accompany the merchandise. If our inspection veries the defect, we will ei-
ther 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 re-
paired 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 specic 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 • [phone]