Harbor Freight Tools Nail Gun 93257 User Manual

COIL SIDING NAILER  
WITH MAGNESIUM BODY  
Model 93257  
ASSEMBLY AND OPERATING INSTRUCTIONS  
Due to continuing improvements, actual product may differ slightly from the product described herein.  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
TO PREVENT SERIOUS INJURY,  
READ AND UNDERSTAND ALL WARNINGS  
AND INSTRUCTIONS BEFORE USE.  
©
®
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 FreightTools.  
For technical questions, please call 1-800-444-3353.  
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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.  
8.  
Do not overreach. Keep proper footing and balance at all times. Do not reach  
over or across running machines or air hoses.  
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 filings 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.  
12.  
Remove adjusting wrenches. Check that adjusting wrenches are removed  
from the tool or machine work surface before attaching to an air source.  
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 finger 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.  
14.  
Stay alert. Watch what you are doing. Use common sense. Do not operate any  
tool when you are tired.  
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 fixtures, and any other condition that may  
affect proper operation. Any part that is damaged should be properly repaired or  
replaced by a qualified technician. Do not use the tool if the trigger does not  
operate properly.  
SKU 93257  
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15.  
16.  
Guard against electric shock. Prevent body contact with grounded surfaces  
such as pipes, radiators, ranges, and refrigerator enclosures.  
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.  
18.  
Do not operate tool if under the influence of alcohol or drugs. Read warning  
labels if taking prescription medicine to determine if your judgement or reflexes  
are impaired while taking drugs. If there is any doubt, do not operate the tool.  
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 fire, 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 a longer air hose, use the compressor without an extension cord, or  
find 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 qualified technician.  
20.  
21.  
Compressed air only. Never use combustible gas as a power source.  
Do not load nails with the trigger or safety depressed. Unintentional  
firing may occur. Do not load nails when the air hose is connected to the  
tool. Always assume the tool contains nails.  
22.  
23.  
Disconnect air supply before loading the Nailer. Before reloading (or making  
any adjustments to) the Nailer, make sure the compressed air is disconnected.  
Fire nails into an appropriate work surface only. Do not attempt to fire 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 fire 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 fire nails too close to the edge of a workpiece. They may split the  
workpiece and fly free, causing personal injury.  
SKU 93257  
For technical questions, please call 1-800-444-3353  
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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.  
27.  
Stay within air pressure capacity. Never operate the Nailer above 125 PSI.  
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.  
30.  
Avoid working alone. If an accident happens, an assistant can bring help.  
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.  
Rev 11/06  
SKU 93257  
For technical questions, please call 1-800-444-3353  
PAGE 5  
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OPERATION  
For best service, you should 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. 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.  
QUICK  
CONNECTOR  
AIR  
HOSE  
QUICK  
CONNECTOR  
OILER  
FILTER  
AIR  
COMPRESSOR  
QUICK  
COUPLER  
QUICK  
COUPLER  
NAILER  
REGULATOR  
FIGURE A  
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.  
2.  
Make sure the tool is disconnected from its air supply.  
Completely empty the Magazine (85) of Nails. Then, close the Magazine.  
(See Figure B.)  
FIGURE B  
TRIGGER  
(60)  
AIR PLUG  
(82-not included)  
MAGAZINE  
(85)  
SAFETY  
(38)  
REV 12/06  
SKU 93257  
For technical questions, please call 1-800-444-3353  
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3.  
4.  
Connect the air supply to the tool at the Air Plug (82-not included). Set the regula-  
tor at the recommended 70 to 125 operating PSI. Do not exceed the maximum  
125 PSI.  
Test the tool by depressing the Safety (38) against a piece of scrap wood without  
pulling the Trigger (60). The tool must not cycle (fire). If it cycles (fires), stop  
immediately and have it repaired by a qualified service technician.  
(See Figure B.)  
5.  
6.  
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  
(fire). If the tool cycles (fires), stop immediately and have it repaired by a qualified  
service technician. (See Figure B.)  
Depress the Safety (38) against the workpiece and squeeze the Trigger (60). The  
tool must cycle (fire) only once. Release the Trigger and squeeze it again. The  
tool must not cycle (fire). With the Trigger held, carefully lift the Nailer and press  
it against the scrap wood again. The tool must not cycle (fire). If it fails to  
perform in the manner explained in bold, have it repaired by a qualified service  
technician. (See Figure B.)  
LOADING COIL NAILS  
WARNING: Always wear ANSI approved impact safety goggles when  
reloading 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.)  
MAGAZINE COVER  
(91)  
LATCH  
(57)  
FIGURE C  
DOOR  
(32)  
Rev 11/06; REV 12/06  
SKU 93257  
For technical questions, please call 1-800-444-3353  
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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).  
MAGAZINE POST  
(87)  
(TURN TO ADJUST HEIGHT)  
MAGAZINE COVER  
(91)  
DOOR  
(32)  
NAILS  
(NOT INCLUDED)  
NAIL SUPPORT  
(88)  
FIGURE D  
FEED PAWL  
(42)  
3.  
4.  
Place a coil of Nails (not included) around the Nail Support (88) in the  
Magazine (85). (See Figure D.)  
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 fits 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.)  
OPERATING THE NAILER  
1.  
2.  
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.  
Rotate the Exhaust Cover (2) so that the exhaust air blast will be directed away  
from the operator. (See Figure E, next page  
Rev 11/06; REV 12/06  
SKU 93257  
For technical questions, please call 1-800-444-3353  
PAGE 8  
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3.  
To fire, place the Safety (38) of the Nailer on the workpiece. The Nailer should  
not fire if the Safety is not depressed. Once depressed, gently and briefly  
squeeze the Trigger (60) once. Do not fire repeatedly. Nails could bounce off  
of one another, damaging the workpiece or causing personal injury.  
(See Figure E.)  
4.  
5.  
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.)  
When finished using the Nailer, always disconnect the tool from its air supply.  
Empty the Magazine (85) completely of nails. Attempt to fire the Nailer into a  
piece of scrap wood to ensure it is disconnected and is incapable of firing any  
nails. (See Figure E.)  
6.  
Make sure to store the Nailer in a clean, dry, safe location out of reach of children.  
EXHAUST COVER  
FIGURE E  
(2)  
TRIGGER  
(60)  
AIR PLUG  
(82-not included)  
MAGAZINE  
(85)  
SAFETY  
(38)  
REV 12/06  
SKU 93257  
For technical questions, please call 1-800-444-3353  
PAGE 9  
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Anytime any maintenance or repairs are done (including clearing jams), FIRST:  
1.  
Disconnect the Nailer from its air supply.  
Empty the Magazine (85) completely.  
2.  
3.  
Attempt to fire the Nailer into a piece of scrap wood to ensure that it is disconnected  
and is incapable of firing any Nails.  
CLEARING JAMS  
1.  
Occasionally, a Nail may become jammed in the firing 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 fire the Nailer into a piece of scrap  
wood to ensure it is disconnected and is incapable of firing any Nails.  
3.  
4.  
5.  
Use a pair of needle nose pliers to remove the jammed Nail (usually in the Feed  
Pawl (42) area.  
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.  
Press the Safety (38) against a piece of scrap wood, and test fire the Nailer  
several times while checking for proper operation. If the Nailer is properly firing,  
you may continue using the tool. If the tool fails to perform properly, immediately  
discontinue use and have the tool repaired by a qualified service technician.  
6.  
When finished working, disconnect the air supply. Remove the nails. Then, store  
the Nailer in a clean, dry, safe location out of reach of children.  
SKU 93257  
For technical questions, please call 1-800-444-3353  
PAGE 10  
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Anytime any maintenance or repairs are done, FIRST:  
Disconnect the Nailer from its air supply.  
1.  
2.  
3.  
Empty the Magazine (85) completely.  
Attempt to fire the Nailer into a piece of scrap wood to ensure that it is disconnected  
and is incapable of firing any Nails.  
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 qualified 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/filter in the compressed air system for better performance and longer tool life.  
The filter must have adequate flow capacity for the specific application.  
(See Assy. Diagram.)  
3.  
Clean the external parts of the Nailer with a clean cloth and mild detergent or  
nonflammable solvent. Then, dry.  
4.  
5.  
Store the tool in a clean, dry, safe location out of reach of children.  
WARNING: All maintenance, service, or repairs not listed in this manual  
are only to be attempted by a qualified service technician.  
SKU 93257  
For technical questions, please call 1-800-444-3353  
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TROUBLESHOOTING  
Problem  
Trigger Valve leaks air  
Nose leaks air  
Possible Cause  
Corrective Action  
Replace O-Ring  
Replace O-Ring or Gasket  
O-Ring cut or cracked  
O-Ring or Gasket is cut  
or cracked  
Bumper cracked or worn  
Air supply restricted  
Replace Bumper  
Check air supply equipment  
Failure to cycle (fire)  
Tool dry. Lack of lubrication  
Use Air Tool Oil  
Broken Cylinder Cap Spring  
Air pressure too low  
Broken Cylinder Cap Spring  
Replace Cylinder Cap Spring  
Check air supply equipment  
Replace Cylinder Cap Spring  
Lack of power  
Slow to cycle (fire)  
O-Rings/Seals cut or cracked Replace O-Rings/Seals  
Exhaust blocked  
Check Bumper & Head Valve Spring  
Tool dry, lack of lubrication  
Bent nails  
Use Air Tool Oil  
Replace with new nails  
Nails jam in tool  
Broken/chipped Driver  
Wrong size/type nail  
Replace Driver  
Replace with correct size/type nail  
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 ORWARRANTY OF ANY KINDTOTHE BUYERTHAT HE  
OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER  
AND/OR DISTRIBUTOR EXPRESSLY STATESTHAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD  
BE UNDERTAKEN BY CERTIFIED AND LICENSEDTECHNICIANS, AND NOT BYTHE BUYER. THE BUYER  
ASSUMES ALL RISKS AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL  
PRODUCT OR REPLACEMENT PARTSTHERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF  
REPLACEMENT PARTSTHERETO.  
SKU 93257  
For technical questions, please call 1-800-444-3353  
PAGE 12  
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PARTS LIST  
Part #  
1
Description  
Part #  
Description  
Spring  
Screw  
49  
50  
51  
52  
53  
54  
55  
56  
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  
83  
84  
85  
86  
87  
88  
89  
90  
91  
93  
94  
A1  
A2  
2
3
4
5
6
7
8
9
Exhaust Cover  
Screw  
Elastic Washer  
Cylinder Cap (Magnesium)  
Gasket  
Head Cap  
Ring  
Compression Spring  
O-Ring  
O-Ring  
Head Valve  
Gasket  
Screw  
Washer  
Spring  
Spring Guide  
Piston Stopper  
Cover  
Clip  
Pin  
Spring  
Latch  
O-Ring  
Pin  
Trigger (A)  
Receiver  
Trigger (B)  
Pin  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
O-Ring  
Pin  
Piston Head  
Driver Rod  
Clip  
Cylinder Ring  
O-Ring  
Cylinder  
Ring  
O-Ring  
Body (Magnesium)  
O-Ring  
Bumper  
Pin Guide  
Spring  
Feed Pawl (B)  
Pin  
Door  
Screw  
Nose (Bottom Plate)  
Pin Guide  
Cover  
Pin  
Safety  
Spring  
Screw  
Grip Handle  
Trigger Cover  
Trigger Plunger  
O-Ring  
Spring  
O-Ring  
Valve Bushing  
O-Ring  
O-Ring  
Pin  
Trigger Valve  
O-Ring  
O-Ring  
Screw  
Clip  
Filter Unit  
End Cap  
Air Plug (not included)  
Retainer  
Pin  
Magazine  
Receiver (B)  
Magazine Post  
Nail Support  
Spring  
Receiver (A)  
Magazine Cover  
Tool Oil  
Hex Wrench  
Control Air Valve  
Main Piston Unit  
Screw  
Feed Pawl (A)  
Pin  
Spring  
Pin  
Feed Piston  
O-Ring  
O-Ring  
REV 12/06  
SKU 93257  
For technical questions, please call 1-800-444-3353  
PAGE 13  
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ASSEMBLY DIAGRAM  
#82 Air Plug (not  
included)  
#93 Tool Oil  
#94 Hex Wrench  
Not Shown  
NOTE:  
Some parts are listed and shown for illustration purposes only,  
and are not available individually as replacement parts.  
REV 12/06  
SKU 93257  
For technical questions, please call 1-800-444-3353  
PAGE 14  
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