Harbor Freight Tools Nail Gun 93760 User Manual

®
FRAMING NAILER  
28 DEGREE - FULL CLIP  
Model 93760  
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© 2006 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.  
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 non-conductive clothes and non-skid foot-  
wear 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 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.  
12.  
Remove adjusting wrenches. Check that adjusting wrenches are removed  
from the tool or machine work surface before attaching to an air source.  
Avoid unintential 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 93760  
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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 the compressor without an extension cord or find a  
larger amperage circuit to use.  
19.  
20.  
21.  
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.  
Compressed air only. Use clean, dry, regulated, compressed air at 90 PSI.  
Never use oxygen, carbon dioxide, combustible gases, or any other bottled  
gases a power source for this tool.  
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 93760  
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.  
SAVE THESE INSTRUCTIONS  
UNPACKING  
When unpacking, check to make sure that all accessories listed on page 12 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 93760  
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 in-line filter as shown in  
the diagram below. Hoses, couplers, oilers, regulators, and filters are all available at  
Harbor Freight Tools.  
NOTE: If you are not using an automatic oiler system, before operation, add a few  
drops ofTool Oil (89) to the airline connection. Add a few drops more after each  
hour of continual use.  
REGULATOR  
QUICK  
CONNECTOR  
QUICK  
CONNECTOR COUPLER  
QUICK  
OILER  
FILTER  
QUICK  
COUPLER  
AIR HOSE  
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.  
3.  
Make sure the tool is disconnected from its air supply.  
Completely empty the Magazine Assembly (73) of Nails.  
The Nailer should not fire if the Nose (40) is not depressed against the  
workpiece.  
4.  
5.  
Make sure the Trigger (58) and Nose (40) move freely, without sticking.  
Connect the air supply to the tool at the Quick Connector (85). Set the regulator  
at the recommended 90 PSI. Do not exceed the maximum 125 PSI.  
6.  
7.  
Test the tool by depressing the Nose (40) against the workpiece without  
pulling the Trigger (58). The tool must not cycle (fire). If it cycles (fires), stop  
immediately and have it repaired by a qualified service technician.  
Hold the tool away or off the workpiece in a safe direction. The Nose (40) of the  
tool should return to its original position. Squeeze the Trigger (58). The tool  
should not cycle (fire). If the tool cycles (fires), stop immediately and have it  
repaired by a qualified service technician.  
Rev 11/06  
SKU 93760  
For technical questions, please call 1-800-444-3353  
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8.  
Depress the Nose (40) against the workpiece and squeeze the Trigger (58). 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 workpiece 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.  
LOADING 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.  
Note: This Nailer only uses 280 collated nails.  
1.  
2.  
Pull the Feeder Shoe (71) all the way to the rear until it latches.  
Orient a strip of Nails (86, 87) with points down and drop the Nails into the  
Magazine (73).  
3.  
4.  
Slide the Nails (86, 87) forward in the Magazine (73). The Magazine will hold 90  
Nails.  
Pull the Feeder Shoe (71) backward, and then press the Lock (77) to allow the  
Feeder Shoe to slide forward against the Nails (86, 87).  
TRIGGER  
INSERT NAIL  
HERE  
(58)  
MAGAZINE  
(73)  
FEEDER SHOE  
(71)  
NOSE  
(40)  
SKU 93760  
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OPERATING THE NAILER  
1.  
Attach the Nailer to the air supply at the Quick Connector (85). Start your  
compressor and check the pressure, making sure it is set at 90 PSI.  
Do not exceed the maximum 125 PSI.  
2.  
3.  
Rotate the Exhaust Cover (4) so that the exhaust air blast will be directed  
away from the operator.  
To fire, place the Nose (40) of the Nailer on the workpiece. The Nailer should not  
fire if the Nose is not depressed. Once depressed, gently and briefly squeeze  
the Trigger (58) once; one Nail will be fired.  
4.  
5.  
Do not press the Nose (40) against the workpiece with extra force. Allow the tool  
to do the work. Always allow the tool to recoil off the work surface.  
When finished using the Nailer, always disconnect the tool from its air supply.  
Empty the Magazine Assembly (73) 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.  
6.  
Make sure to store the Nailer in a clean, dry, safe location out of reach of children.  
EXHAUST COVER  
(4)  
QUICK CONNECTOR  
(85)  
TRIGGER  
(58)  
MAGAZINE  
(73)  
NOSE  
(40)  
Rev 11/06  
SKU 93760  
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PAGE 8  
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Anytime any maintenance or repairs are done (including clearing jams), FIRST:  
1.  
2.  
3.  
Disconnect the Nailer from its air supply.  
Empty the Magazine Assembly (73) 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.  
4.  
Always leave the Magazine Assembly (73) open during maintenance. The  
Magazine is spring loaded, and may cause parts or a Nail to fly out of the Nailer.  
CLEARING JAMS  
1.  
2.  
Occasionally, a Nail may become jammed in the firing mechanism of the  
Nailer, making the tool inoperable. To remove a jammed Nail, disconnect the  
Nailer from its air supply. Empty the Magazine Assembly (73) 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.  
Use a pair of needle nose pliers to remove a jammed Nail from the back of the  
Nose (40). If a jammed Nail cannot be removed as described, it may be  
necessary to disassemble the Magazine (73) as follows:  
CAUTION: If you are not clear about how to remove and re-assemble the  
Magazine (73) to clear a jammed Nail, have a qualified service technician perform  
this procedure.  
3.  
4.  
5.  
6.  
Remove the two Screws (35). (One Screw on each side of Magazine (73).  
Remove the two Nuts (76).  
Slide the Magazine (73) back, off of the Nose (40).  
After clearing the jammed Nail, re-assemble in reverse order.  
MAGAZINE (73)  
MAGAZINE (73)  
SCREW  
(35)  
NUT  
(76)  
NOSE (40)  
SKU 93760  
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7.  
8.  
9.  
Make sure the Nose (40) moves freely.  
Reload the Nailer with Nails. Then, reconnect the air supply hose to the tool.  
Press the Nose (40) 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.  
10.  
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.  
Anytime any maintenance or repairs are done, FIRST:  
1.  
2.  
3.  
Disconnect the Nailer from its air supply.  
Empty the Magazine Assembly (73) 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.  
4.  
Always leave the Magazine Assembly (73) open during maintenance. The  
Magazine is spring loaded, and may cause parts or a Nail to fly out of the Nailer.  
INSPECTION, MAINTENANCE, AND CLEANING  
1.  
2.  
Inspect the air supply Screen that is located in the End Cap (84) before each  
use, and clean or replace as necessary. Dirt and water in the air supply Screen  
are major causes of pneumatic tool wear. Use a filter in the compressed air  
system for better performance and longer tool life. The filter must have adequate  
flow capacity for the specific application.  
Clean the external parts of the Nailer with a clean cloth and mild detergent or  
non-flammable solvent. Then, dry.  
3.  
4.  
Store the tool in a clean, dry, safe location out of reach of children.  
CAUTION: All maintenance, service, or repairs not listed in this manual  
are only to be attempted by a qualified service technician.  
SKU 93760  
For technical questions, please call 1-800-444-3353  
PAGE 10  
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TROUBLESHOOTING  
Problem  
Possible Solution  
Air leak near top of tool.  
(See Assy. Diagram.)  
1. Tighten all screws on the cylinder cap.  
2. Have a qualified service technician install a head valve piston set.  
Tool does not work.  
(See page 6.)  
1. Make sure the compressor regulator is set at 90 PSI.  
2. Check all air connections for leaks.  
3. Make sure to fully depress the nose on the workpiece when  
attempting to fire a nail. (See page 7.)  
4. Check for nail jams. Clear the jam if necessary. (See pages 9 & 10)  
5. Have a qualified service technician check out the tool.  
1. Make sure the compressor regulator is set at 90 PSI. Make sure  
compressor used produces sufficient C.F.M. to operate the Nailer.  
Sluggish operation.  
2. Check all air connections for leaks.  
3. Have a qualified service technician install a head valve piston set.  
Air leak near bottom of tool.  
1. Tighten all screws.  
2. Have a qualified service technician replace the bumper or head  
Valve piston set.  
Poor return after firing tool.  
Weak driving force.  
1. Have a qualified service technician clean the interior of the tool and/or  
Replace the bumper or head valve piston set.  
1. Make sure the compressor regulator is set at 90 PSI.  
2. Check all air connections for leaks.  
3. Have a qualified service technician clean the interior of the tool and/or  
Replace the bumper or head valve piston set.  
Poor feed.  
1. Have a qualified service technician clean the interior of the tool and/or  
Lubricate the magazine and install a new magazine spring.  
1. Have a qualified service technician clean the interior of the tool and/or  
Lubricate the magazine and install a new magazine spring.  
1. Have a qualified service technician check out the tool.  
Too jamming too often.  
Other problems.  
SKU 93760  
For technical questions, please call 1-800-444-3353  
PAGE 11  
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PARTS LIST  
Part #  
1
2
3
4
5
6
7
Description  
Screw (M5x20)  
Spring Washer (#5)  
Bushing  
Exhaust Cover  
Seal  
Screw (M6x30)  
Spring Washer (#6)  
Cylinder Cap  
Gasket  
Part #  
47  
Description  
O-Ring (9.5x1.9)  
O-Ring (10.3x1.9)  
Trigger Valve Head  
O-Ring (12.8x1.9)  
Spring  
O-Ring (5.5x1.5)  
Trigger Valve Stem  
O-Ring (24.8x2)  
Trigger Valve Guide  
Spring  
Trigger Spring  
Trigger  
Spring Pin (2.5x17)  
Rail  
Washer (#5)  
Nut (M4)  
Washer (#5)  
Coil Spring Assembly  
Pin  
Bushing  
Screw (M4x8)  
Block  
Spring Washer (#4)  
Screw (M4x12)  
Feeder Shoe  
Screw (M5x14)  
Magazine  
Screw (M4x16)  
Support  
Nut (M5)  
Lock  
Torsion  
48  
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  
8
9
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  
Washer  
Valve Seat  
Spring  
O-Ring (57.5x2.6)  
O-Ring (72.4x3.5)  
Valve  
Screw (M6x8)  
Cylinder Seal  
Collar  
O-Ring (54.4x4)  
Piston Assembly  
Cylinder  
O-Ring (72.4x3.5)  
O-Ring (67x3)  
Restrictive Plate  
O-Ring (97.5x3.5)  
Bumper A  
Bumper B  
Body  
O-Ring (62.3x1.8)  
Nose  
Spring Washer (#8)  
Screw (M8x25)  
Spring  
Safety Bracket A  
Screw (M5x12)  
Bushing  
Safety Bracket B  
Washer  
Bushing  
Nut (M4)  
Nut (M6)  
Soft Grip Sleeve  
O-Ring (65.4x2.5)  
End Cap  
Screw (M5x10)  
Nose  
Seal  
Quick Connector  
Nails (0.131” Dia. x 3” Long, Wire Collated, Full Head, Qty. 100)  
Nails (0.113” Dia. x 2-1/2” Long, Paper Collated, Clip Head, Qty. 100)  
Pin  
Goggles  
Tool Oil  
Hex Wrenches (Set of 3)  
Carrying Case  
Safety Guide  
O-Ring (20.3x2.5)  
O-Ring (20.3x1.5)  
Valve Set  
NOTE:  
Some parts are listed and shown for illustration purposes only,  
and are not available individually as replacement parts.  
SKU 93760  
For technical questions, please call 1-800-444-3353  
PAGE 12  
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ASSEMBLY DIAGRAM  
86: Nails not shown.  
87: Nails not shown.  
88: Goggles not shown.  
89: Tool Oil not shown.  
90: Hex Wrenches not shown.  
91: Carrying Case not shown.  
NOTE:  
Some parts are listed and shown for illustration purposes only,  
and are not available individually as replacement parts.  
SKU 93760  
For technical questions, please call 1-800-444-3353  
PAGE 13  
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®
LIMITED 1 YEAR  
WARRANTY  
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and  
durability standards, and warrants to the original purchaser that this product is free from defects in  
materials and workmanship for a period of 1 year 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; 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.  
To take advantage of this warranty, the product or part must be returned to us with transportation  
charges prepaid. Proof of purchase date and an explanation of the complaint must accompany the  
merchandise. If our inspection verifies the defect, we will either repair or replace the product at our  
election or we may elect to refund the purchase price if we cannot readily and quickly provide you  
with a replacement. We will return repaired products at our expense, but if we determine there is no  
defect, or that the defect resulted from causes not within the scope of our warranty, then you must  
bear the cost of returning the product.  
This warranty gives you specific legal rights and you may also have other rights which vary from  
state to state.  
3491 Mission Oaks Blvd. • P.O. Box 6009 • Camarillo, CA 93011 • (800) 444-3353  
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.  
SKU 93760  
For technical questions, please call 1-800-444-3353  
PAGE 14  
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