Harbor Freight Tools Nail Gun 44923 User Manual

®
BRAD NAILER / STAPLER  
2-IN-1 KIT  
Model 44923  
ASSEMBLY AND OPERATION  
INSTRUCTIONS  
3491 Mission Oaks Blvd., Camarillo, CA 93011  
TO PREVENT SERIOUS INJURY,  
READ AND UNDERSTAND ALL WARNINGS  
AND INSTRUCTIONS BEFORE USE.  
©
®
Copyright 2001, 2004 by Harbor FreightTools . 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 and replacement parts, please call 1-800-444-3353  
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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 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. 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 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 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  
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.  
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 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.  
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 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  
SKU 44923  
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panel fuse to break. If this happens, either 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. Compressed air only. Never use combustible gas as a power source.  
21.  
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 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 fasteners into an appropriate work surface only. Do not attempt to fire fasteners  
into surfaces too hard to penetrate. Do not drive fasteners on top of other fasteners, or at  
too steep of an angle. Fasteners can ricochet causing personal injury. Never fire 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 fire fasteners too close to the edge of a workpiece. They may split the  
workpiece and fly free, causing personal injury.  
25. Take caution as some woods contain preservatives such as copper chromium  
arsenate (CCA) which can be toxic. When stapling 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 100 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 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.  
SKU 44923  
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Unpacking  
When unpacking, check to make sure the parts listed on page 9 are included. If any  
parts are missing or broken, please call Harbor FreightTools at the number on the cover of this  
manual as soon as possible.  
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  
Frei
Note: To connect this tool, we recommend a quick coupler/adapter (not included). Coupler/  
adapters are available at Harbor FreightTools.For smoother operation, put 3-5 drops of  
pneumatic tool oil in the Air Inlet (122) before each use.  
Testing the DoubleTrigger Safety Mechanism  
Warning: Even though the nailer should be  
Figure 1  
empty during this procedure, ALWAYS point  
the nailer at a piece of scrap wood when  
testing.  
1. Make sure the tool is disconnected from the  
power supply.  
Trigger (125)  
2. Completely empty the magazine of nails.  
SafetyTrigger  
(123)  
3. The Nailer should not fire if the second trigger  
is not pulled.  
4. Check that the Trigger (125) and the Safety Trigger (123) move freely, without sticking -  
see Figure 1.  
5. Connect the air supply to the tool at the Air Inlet (122) set at the recommended 60-100  
PSI, and not to go over the maximum 100 PSI.  
6. Hold the tool against the workpiece. Squeeze the Safety Trigger (123) and release it.  
The Safety Trigger should return to its original position. Squeeze the Trigger (125). The  
tool should not cycle (fire). If it cycles (fires), stop immediately and take the tool to an  
authorized service technician.  
7. Squeeze the Safety Trigger (123) and then the Trigger (125). The tool must cycle (fire).  
If it fails to cycle (fire), take it to an authorized service technician.  
SKU 44923  
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Loading Staples  
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. The Nailer/Stapler should be in the same position as in Figure 2.  
2. As in Figure 3, depress Magazine Lock (229) and slide Magazine Cover (227) open.  
3. Slide the staples over the Magazine’s Core (216) (see Figure 4).  
4. After the staples reach the nose of the tool, close the Magazine Cover (see Figure 5).  
Figure 2  
Figure 3  
Magazine  
Lock (229)  
Magazine  
Cover (227)  
Figure 4  
Figure 5  
Magazine  
Cover (227)  
Core (216)  
Loading Brad 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.  
Figure 6  
1. Follow Loading Staples steps 1 and 2, above.  
2. Insert the Brad Nails into the Magazine, letting the  
pointed end ride on the rail along the bottom of  
the Magazine (205) (see Figures 4 and 6).  
Magazine  
Cover (227)  
3. After the Nails reach the nose of the tool, close  
the Magazine Cover (227) (see Figure 6, below).  
SKU 44923  
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Operating the Nailer  
1.  
2.  
Attach the Nailer to the air supply at the Air Inlet (122). Start your compressor and check  
the pressure making sure it is set at the recommended 60-100 PSI and not to go over the  
maximum 100 PSI.  
To fire, place the nose of the Nailer on the workpiece. The Nailer should not fire if the  
Safety Trigger (123) is not depressed. Once depressed, gently and briefly squeeze the  
Trigger (125) once. Do not fire repeatedly. Nails could bounce off of one another,  
damaging the work piece or causing PERSONAL INJURY.  
Figure 7  
Note: When using Brad Nails, the Driver Guide (206) might leave a slight  
mark on the surface of the workpiece which is larger than the nail  
brad. It occurs normally because the Driver Guide (206) tip is  
slightly wider to accomodate staples.  
To help avoid this, angle the tool slightly as shown in Figure 7.  
Anytime any maintenance or repairs are done (including clearing jams), FIRST:  
1. Disconnect the Nailer from the air hose.  
2. Empty the Magazine (205) completely.  
3. Attempt to fire the Nailer into a piece of scrap wood to ensure that it is disconnected  
and is incapable of firing any brads.  
4. Always leave the Magazine Cover (227) open during maintenance. The Magazine  
is spring-loaded and may cause parts or a nail to fly out of the Nailer.  
Clearing Jams  
Figure 8  
1. Disconnect tool from air hose, empty the Magazine  
(205) of nails, release any built-up air pressure, and  
leave the magazine open, as explained above.  
2. While doing this step and the next, hold the Nailer  
pointed away from you and any other people or  
fragile objects - see Figure 8. Loosen both Cover  
Hex Bolts (234) on Driver Guide Cover C (233) 3/4  
of a turn each - see Figure 9.  
Figure 9  
hole  
3. Slide Driver Guide Cover C (233) toward the nose  
of the Nailer slightly until the holes (See Figure 9.)  
in Driver Guide Cover C (233) line up with the heads  
of both Cover Hex Bolts (234).  
4. Carefully remove Driver Guide Cover C (233) and  
remove the jammed nail. Pliers may be necessary  
to remove a stuck nail.  
Cover Hex  
Bolt (234)  
Driver Guide  
Cover C (234)  
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Clearing Jams (continued)  
5. Inspect the Driver (114) for bends or breakage - see  
Figure 10. If it is not fully retracted or damaged, do  
not use the tool until it is repaired by a qualified  
technician.  
Figure 10  
6. Lightly oil the Driver (114) and replace Driver Guide  
Cover C (233). Slide Driver Guide Cover C (233)  
away from the nose of the Nailer until the shafts of  
the Cover Hex Bolts (234) fit into the slots in the  
Cover. Tighten both Cover Hex Bolts (234) securely.  
Driver (114)  
7. Reload the Nailer.  
8. Reconnect the Nailer to the air hose.  
9. Press the nose of the Nailer against an appropriate piece of scrap wood.  
10. Test fire the Nailer several times, checking for proper operation.  
11. Disconnect the Nailer, remove the nails and store Nailer in a location out of children’s  
reach.  
Anytime any maintenance or repairs are done, FIRST:  
1. Disconnect the Nailer from the air hose.  
2. Empty the Magazine (205) completely.  
3. Attempt to fire the Nailer into a piece of scrap wood to ensure that it is disconnected  
and is incapable of firing any brads.  
4. Always leave the Magazine Cover (227) open during maintenance. The Magazine  
is spring-loaded and may cause parts or a nail to fly out of the Nailer.  
Maintenance  
ANY MAINTENANCE OR REPAIRS ASIDE FROMTHAT LISTED BELOW SHOULD  
ONLY BE PERFORMED BY A QUALIFIEDTECHNICIAN.  
1. Inspect all of the nuts and screws and make sure they are securely fastened.  
2. Periodically lubricate the driving mechanism and magazine with a light oil. Wipe down  
with a clean cloth.  
3. Inspect and clean the Air Filter Regulator and the Air Compressor according to  
manufacturer’s instructions.  
SKU 44923  
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Parts List  
Description  
Pin  
Part  
101  
102  
103  
104  
105  
106  
107  
108  
109  
110  
111  
112  
113  
114  
115  
116  
117  
118  
119  
120  
121  
122  
123  
Description  
Hex Sec. Bolt  
Spring Washer  
Deflector  
Spring  
Part  
124  
125  
126  
127  
128  
129  
130  
131  
132  
134  
201  
202  
203  
204  
205  
206  
207  
208  
209  
210  
211  
212  
213  
Part  
214  
215  
216  
217  
218  
219  
220  
221  
222  
223  
224  
225  
226  
227  
228  
229  
230  
231  
232  
233  
234  
Description  
Flat Bar  
Trigger  
Hex Sec. Bolt  
Core  
Long Pin  
Seal  
Pusher  
Seal  
Trigger Valve Head  
Trigger Valve Head  
O-ring  
Link Block  
Cap  
Pusher Spring  
Spring Washer  
Nut  
O-ring  
O-ring  
O-ring  
Valve Piston  
O-ring  
Trigger Valve Guide  
O-ring  
Bracket  
Washer  
Stopping Ring  
Collar  
Hex Sec. Bolt  
Spring Washer  
Stopping Bracket  
Nut  
Stopper Spring  
Stopper  
O-ring  
Rear Plate  
Magazine Cover  
O-ring  
Driver  
O-ring  
Magazine  
Cylinder  
Bumper  
Driver Guide  
Driver Guide Cover B  
Spring Washer  
Hex Sec. Bolt  
Driver Guide Cover A  
Spring  
Magazine Lock  
Pin  
Gun Body  
Joint Guide  
Hex Sec. Bolt  
O-ring  
Spring Washer  
Hex Sec. Bolt  
Driver Guide Cover C  
Cover Hex Bolt  
Air Inlet  
Flat Bar  
Safety Trigger  
Hex Sec. Bolt  
PLEASE READTHE FOLLOWING CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDEDTHE PARTS DIAGRAM INTHIS  
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBU-  
TOR MAKES ANY REPRESENTATION ORWARRANTY OF ANY KINDTO THE BUYERTHAT 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 STATESTHAT 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.  
NOTE: Some parts are listed and shown for illustration purposes only and are not available  
individually as replacement parts.  
SKU 44923  
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Assembly Drawing  
SKU 44923  
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