Central Pneumatic 93257 User manual

MAGNESIUM COIL SIDING NAILER
Model 93257
ASSEMBLY AND OPERATING INSTRUCTIONS
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©2005 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 improve-
ments, 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.
Revised Manual 10g

PRODUCT SPECIFICATIONS
SAVE THIS MANUAL
You will need this manual for the safety warnings and precautions, assembly, operating,
inspection, maintenance and cleaning procedures, parts list and assembly diagram. Keep
your invoice with this manual. Write the invoice number on the inside of the front cover.
Keep this 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 fol-
lowed 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 electri-
cally 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.
SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 2
Operating Air Pressure 70~125 PSI *
Average Air Consumption 4 CFM @ 90 PSI
Actuation System Full Sequential Safety Trip Mechanism
Magazine Type Barrel Type, Nail Coil Canister w/Adjustable Nail Height
Magazine Capacity 250–400 Nails
Nail Type 0.082”–0.099” Shaft (12–14 Gauge), Wire-Collated Only
Nail Length Capacity 11/4”–21/8” Long
Air Inlet Size 1/4”-18 NPT
Overall Dimensions 111/4” L x 5” W x 111/4” H
Unit Weight 5.7 Pounds
Accessories Tool Oil, Hex Wrench**
**Refer to Inspection, Maintenance, and Cleaning, page 11, for proper usage.
REV 05j REV 06k
* The air pressure setting must not exceed job site regulations/restrictions. The air pressure set-
ting must not exceed 90 PSI when being used with work pieces that have a thickness of less than
1-3/4”.

6. Dress properly. Do not wear loose clothing or jewelry as they can be caught in
moving parts. Protective, electrically nonconductive clothes and nonskid
footwear are recommended when working. Wear restrictive hair covering to
contain long hair.
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 a NIOSH-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 wrenches. Check that 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 nails 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.
SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 3

SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 4
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 qualied 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 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, ei-
ther use a longer air hose, 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 the tool contains nails.
22. Disconnect air supply before loading the Nailer. Before reloading (or making
any adjustments to) the Nailer, make sure 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 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 impact 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 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, cement, and 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 workplace. Carry the tool by the handle to avoid contact with the trigger.
29. Avoid working alone. If an accident happens, an assistant can bring help.
30. 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 the tool performance.
31. 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.
UNPACKING
When unpacking, check to make sure that all accessories listed on page 13 are
included, and the product is intact and undamaged. 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.
SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 5
Rev 06k

NAILER
QUICK
CONNECTOR
QUICK
COUPLER
AIR
HOSE
QUICK
COUPLER
QUICK
CONNECTOR
OILER
REGULATOR
FILTER
AIR
COMPRESSOR
CONNECTION TO AIR SUPPLY
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. Make sure the tool is disconnected from its air supply.
2. Completely empty the Magazine (85) of Nails. Then, close the Magazine.
(See Figure B.)
SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 6
TRIGGER
(60)
MAGAZINE
(85)
SAFETY
(38)
FIGURE A
FIGURE B
AIR PLUG
(82-not included)
OPERATION
For best service, you should incorporate an oiler, regulator, and inline lter, as
shown in the diagram below. Hoses, couplers, oilers, regulators, and lters are
all available at Harbor Freight Tools. NOTE: If an automatic oiler is not used,
for smoother operation and to extend the life-span of the tool, put 3-5 drops of
pneumatic Tool Oil (93) in the attached Air Plug (82-not included) before each
use.
REV 06l

3. Connect the air supply to the tool at the Air Plug (82-not included). Set the regu-
lator at the recommended 70 to 125 operating PSI. Do not exceed the maximum
125 PSI.
4. Test the tool by depressing the Safety (38) against a piece of scrap wood without
pulling the Trigger (60). The tool must not cycle (re). If it cycles (res), stop im-
mediately and have it repaired by a qualied service technician.
(See Figure B.)
5. Hold the tool away or off the workpiece. The Safety (38) of the tool should return
to its original position. Squeeze the Trigger (60). The tool should not cycle (re).
If the tool cycles (res), stop immediately and have it repaired by a qualied ser-
vice technician. (See Figure B.)
6. Depress the Safety (38) against the workpiece and squeeze the Trigger (60). The
tool must cycle (re) only once. 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 scrap wood again. The tool must not cycle (re). If it fails to perform
in the manner explained in bold, have it repaired by a qualied service technician.
(See Figure B.)
SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 7
LATCH
(57)
DOOR
(32)
MAGAZINE COVER
(91)
FIGURE C
LOADING COIL NAILS
WARNING: Always wear ANSI approved impact safety goggles when re-
loading or performing 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 when
loading the tool.
1. To open the Magazine Cover (91), press down on the Latch (57) and swing the
Door (32) open. Then, swing the Magazine Cover open. (See Figure C.)
Rev 06k; REV 06l

SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 8
2. Check the Nail Support (88) inside the Magazine (85). The Nail Support can be
adjusted up and down to use various lengths of nails from 1-1/4” to 2-1/8”:
(See Figure D.)
A. 1-1/4” Long Nails (Turn Magazine Post (87) to top setting).
B. Between 1-1/4” and 2-1/8” Long Nails (Use middle setting).
C. 2-1/8” Long Nails (Use bottom setting).
FIGURE D
NAIL SUPPORT
(88)
NAILS
(NOT INCLUDED)
MAGAZINE POST
(87)
(TURN TO ADJUST HEIGHT)
3. Place a coil of Nails (not included) around the Nail Support (88) in the
Magazine (85). (See Figure D.)
4. Uncoil enough Nails to reach the Feed Pawl (42). Place the second Nail on the
coil between the teeth of the Feed Pawl, making sure the Nail head ts in the slot
in the upper portion of the Feed Pawl. (See Figure D.)
5. Swing the Magazine Cover (91) closed. Then, close the Door (32). Make sure
the Door closes securely. If it does not engage, the Nail head is not in the slot in
the upper portion of the Feed Pawl (42). (See Figure D.)
FEED PAWL
(42)
MAGAZINE COVER
(91)
DOOR
(32)
OPERATING THE NAILER
1. Attach the Nailer to the air supply at the Air Plug (82-not included). Start your
compressor and check the pressure, making sure it is set at the recommended
70 to 125 PSI. Do not exceed the maximum 125 PSI.
2. Rotate the Exhaust Cover (2) so that the exhaust air blast will be directed away
from the operator. (See Figure E, next page.) Rev 06k; REV 06l

SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 9
3. To re, place the Safety (38) of the Nailer on the workpiece. The Nailer should
not re if the Safety is not depressed. Once depressed, gently and briey
squeeze the Trigger (60) once. Do not re repeatedly. Nails could bounce off
of one another, damaging the workpiece or causing personal injury.
(See Figure E.)
4. Do not press the Safety (38) against the workpiece with extra force. Allow the
tool to do the work. Always allow the tool to recoil off the work surface.
(See Figure E.)
5. When nished using the Nailer, always disconnect the tool from its air supply.
Empty the Magazine (85) completely of nails. Attempt to re the Nailer into a
piece of scrap wood to ensure it is disconnected and is incapable of ring any
nails. (See Figure E.)
6. Make sure to store the Nailer in a clean, dry, safe location out of reach of
children.
MAGAZINE
(85)
SAFETY
(38)
TRIGGER
(60)
AIR PLUG
(82-not included)
FIGURE E
EXHAUST COVER
(2)
REV 06l

SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 10
CLEARING JAMS
1. Occasionally, a Nail may become jammed in the ring mechanism of the Nailer,
making the tool inoperable.
2. To remove a jammed Nail, disconnect the Nailer from its air supply. Empty the
Magazine (85) completely of Nails. Attempt to re the Nailer into a piece of scrap
wood to ensure it is disconnected and is incapable of ring any Nails.
3. Use a pair of needle nose pliers to remove the jammed Nail (usually in the Feed
Pawl (42) area.
4. Replace the coil of nails into the Nailer. Close the Magazine Cover (91) and Door
(32) securely. Then, reconnect the air supply hose to the Nailer.
5. Press the Safety (38) against a piece of scrap wood, and test re the Nailer
several times while checking for proper operation. If the Nailer is properly ring,
you may continue using the tool. If the tool fails to perform properly, immediately
discontinue use and have the tool repaired by a qualied service technician.
6. When nished working, disconnect the air supply. Remove the nails. Then, store
the Nailer in a clean, dry, safe location out of reach of children.
Anytime any maintenance or repairs are done (including clearing jams), FIRST:
1. Disconnect the Nailer from its air supply.
2. Empty the Magazine (85) 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 Nails.

SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 11
INSPECTION, MAINTENANCE, AND CLEANING
1. Inspect the Nailer frequently and lubricate periodically with pneumatic Tool Oil
(93). Then, wipe dry. Do not use detergent oil or additives as these lubricants
will cause accelerated wear to the internal seals. Use the included Hex Wrench
(94) to ensure bolts are properly tightened; only a qualied technician should
open the Nailer to repair internal parts.
2. Inspect the Filter Unit (80) before each use and clean or replace as necessary.
Dirt and water in the Filter Unit are major causes of pneumatic tool wear. Use an
oiler/lter in the compressed air system for better performance and longer tool
life. The lter must have adequate ow capacity for the specic application.
(See Assy. Diagram.)
3. Clean the external parts of the Nailer with a clean cloth and mild detergent or
nonammable solvent. Then, dry.
4. Store the tool in a clean, dry, safe location out of reach of children.
5. WARNING: All maintenance, service, or repairs not listed in this manual are
only to be attempted by a qualied service technician.
Anytime any maintenance or repairs are done, FIRST:
1. Disconnect the Nailer from its air supply.
2. Empty the Magazine (85) 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 Nails.

SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 12
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 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 RISKS 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.
TROUBLESHOOTING

PARTS LIST
SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 13
REV 06l

NOTE:
Some parts are listed and shown for illustration purposes only,
and are not available individually as replacement parts.
SKU 93257 For technical questions, please call 1-800-444-3353 PAGE 14
ASSEMBLY DIAGRAM
REV 06l

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]