Harbor Freight Tools Staple Gun 90399 User Manual

®
FLOOR STAPLER  
WITH HAMMER AND CASE  
Model 90399  
ASSEMBLY and OPERATING  
INSTRUCTIONS  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
©
®
Copyright 2003 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 and replacement parts, please call 1-800-444-3353  
Revised Manual 06/04  
 
7.  
8.  
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 recom-  
mended when working. Wear restrictive hair covering to contain long hair.  
Use eye and ear protection. Always wear ANSI approved impact safety goggles.Wear  
a full face shield if you are producing metal filings or wood chips. Wear an ANSI ap-  
proved dust mask or respirator when working around metal, wood, and chemical dusts  
and mists.  
9.  
Do not overreach. Keep proper footing and balance at all times. Do not reach over or  
across running machines or air hoses.  
10. 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  
handles must be kept clean, dry, and free from oil and grease at all times.  
11. Disconnect air supply. Disconnect air hose when not in use.  
12. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are  
removed from the tool or machine work surface before plugging it in.  
13. Avoid unintentional starting. Do not carry any tool with pressure applied to the Ham-  
mer Face (10), whether it is plugged in or not.  
14. Stay alert. Watch what you are doing, use common sense.Do not operate any tool when  
you are tired.  
15. 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 dam-  
aged should be properly repaired or replaced by a qualified technician. Do not use the  
tool if any switch does not turn On and Off properly.  
16. Guard against electric shock. Prevent body contact with grounded surfaces such as  
pipes, radiators, ranges, and refrigerator enclosures.  
17. Replacement parts and accessories. When servicing, use only identical replacement  
parts. 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.  
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.  
19. Use proper size and type extension cord. If an extension cord is required for the air  
compressor, it must be of the proper size and type to supply the correct current to the tool  
without heating up. Otherwise, the extension cord could melt and catch fire, or cause  
electrical damage to the tool. Check your compressor’s manual for the appropriate size  
cord.  
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.  
20. Maintenance. For your safety, maintenance should be performed regularly by a quali-  
fied technician.  
SKU 90399  
For technical questions, please call 1-800-444-3353.  
Page 3  
 
21. Compressed air only. Never use combustible gases as a power source.  
Warning:The warnings, cautions, and instructions discussed in this instruction manual  
cannot cover all possible conditions and situations that may occur. It must be under-  
stood by the operator that common sense and caution are factors which cannot be  
built into this product, but must be supplied by the operator.  
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  
Your risk from these exposures varies, depending on how often you do this type of work. To reduce  
your exposure to these chemicals: work in a well ventilated area, and work with approved safety equip-  
ment, such as those dust masks that are specially designed to filter out microscopic particles.  
(California Health & Safety Code § 25249.5, et seq. )  
Unpacking  
When unpacking, check to make sure the parts listed on page 8 are included. If any parts  
are missing or broken, please call Harbor Freight Tools at the number on the cover of this  
manual as soon as possible  
Operation  
1/4”-18 NPT  
Floor  
Stapler  
For best service you should incorporate an oiler, regulator, and inline filter, as shown in the  
diagram above. Hoses, couplers, oilers, regulators, and filters 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 Floor Stapler. First, wrap the 1/4” air connector (not included) with pipe thread  
seal tape before threading it into the Air Inlet (47). Connect the 3/8” ID Air Source Hose  
to the Air Inlet (47).  
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 between 70-90 PSI. Do not exceed the  
maximum air pressure of 100 PSI.  
3.  
Check the air connection for leaks. Disconnect from the air source.  
SKU 90399  
For technical questions, please call 1-800-444-3353.  
Page 4  
 
Operation (continued)  
Assembly - Attaching the Arm (48) is the only assembly required. See FIGURE 1 and the  
Assembly Drawing on page 8.  
The two Clamp Screws (44) fit in the recessed gaps on the lower part of the Arm (48).  
As shown below, hold the Clamp Screws (44) in place around the Body (18) and add a  
Washer (45) and a Nut (46) to the threaded ends of the Clamp Screws (44). Tighten them  
securely.  
FIGURE 1  
Hammer Face (10)  
(Pounding on this with the  
Hammer (49) shoots out a  
staple.  
Clamp Screws (44)  
Staples exit the  
Stapler from the  
bottom of the  
Shoe (28).  
Recessed  
Gap  
Arm (48)  
Shoe (28)  
Air Inlet (47)  
Magazine (30a)  
Sleeve (36a)  
Loading the Stapler  
Warning! Disconnect the Stapler from the air compressor whenever loading or servicing.  
After disconnecting the Stapler from the air compressor, there could still be enough air pres-  
sure to fire the Stapler. After the air compressor hose is disconnected, always fire the Stapler  
repeatedly to make sure all of the air is expended. See page 6 under “Using the Stapler” for  
firing instructions.  
1.  
Grip the Sleeve (36a) and pull out the Magazine Cover (33a). Insert the staples inside  
the Magazine (30a).  
Note: Only use the size staples listed on the Specifications Chart on page 2.  
2.  
Use caution, the Magazine Cover (33a) will try to snap closed with force when the  
Pin (38) is pressed. While holding the Sleeve (36a) firmly, use a small screwdriver to  
press in the Locking Pin (38) along the edge of the Magazine Cover. See FIGURE 2.  
FIGURE 2  
Air Inlet (47)  
Magazine (30a)  
Locking Pin (38)  
Sleeve (36a)  
Hammer Face (10)  
Magazine Cover (33a)  
Shoe (28)  
REV 11/04  
SKU 90399  
For technical questions, please call 1-800-444-3353.  
Page 5  
 
Operation (continued)  
Using the Floor Stapler  
THIS TOOL DOES NOT USE A SAFETY MECHANISM; extreme caution must be used  
whenever this tool is connected to an air supply. If the tool is dropped or if the Hammer  
Face (10) is accidentally struck, then the tool will fire a staple, potentially causing SEVERE  
PERSONAL INJURY.  
1.  
Connect the Floor Stapler to the air hose and turn on the  
air compressor.  
FIGURE 3  
Note: Before using on a floor, test the unit on a scrap piece of  
wood. Adjust the driving depth by providing more or less  
air pressure. Never exceed 100 PSI.  
Warning! Keep your feet clear of the Stapler. Refer to FIGURES  
1 and 3.  
2.  
Hold the Arm (48) securely with one hand and grip the  
Hammer (49) with the other hand.  
3.  
Make sure the Shoe (28) is over the staple target position.  
Press down hard so that the Shoe (28) is firmly contacting the floor, and then strike the  
Hammer Face (10) with the Hammer (49) to drive out a staple. Lift the tool off of the  
floor.  
4.  
Repeat the process until you are finished. Then, disconnect the Floor Stapler from the  
air source.  
Warning! After disconnecting the Stapler from the air compressor, there could still be enough  
air pressure to fire the Stapler. After the air compressor hose is disconnected, always  
fire the Stapler repeatedly to make sure all of the air is expended  
Troubleshooting  
Note: Have the following problems repaired by a qualified service technician.  
PROBLEM  
CAUSE  
SOLUTION  
Air leaking in nose  
1. Loose Nose Screws  
2. Bumper is cracked/worn  
1. Tighten and recheck  
2. Replace Bumper  
Lack of Power, slow  
to cycle.  
1. Tool is too dry  
2. Air Pressure is too low  
3. Exhaust blocked  
1. Lubricate  
2. Check air supply equipment  
3. Clean exhaust channel  
Intermittent feeding  
or no fastener  
coming out  
1. Damaged pusher spring  
2. Wrong size staple  
3. Dirty magazine or wear-plate 3. Clean magazine and nose  
1. Replace Spring  
2. Use correct size  
Jammed Staple  
1. Driver channel worn  
2. Driver is broken/worn  
3. Bent staples  
1. Replace wear plate  
2. Replace driver  
3. Use straight staples  
REV 11/04  
SKU 90399  
For technical questions, please call 1-800-444-3353.  
Page 6  
 
Anytime any maintenance or repairs are done (including clearing jams), FIRST:  
1.  
Disconnect the Stapler from the air hose.  
Empty Magazine (30a) completely.  
2.  
3.  
Attempt to fire the Stapler into a piece of scrap wood to ensure that it is disconnected  
and is incapable of firing any staples.  
4.  
Always leave Magazine Cover (33a) open during maintenance. The Magazine is  
spring-loaded and may cause parts or a staple to fly out of the Stapler.  
Clearing Jams  
1.  
Disconnect tool from air hose, empty Magazine (30a) of staples, release any built-up  
air pressure, and leave the magazine open, as explained above.  
2.  
While doing this step and the next, hold the Stapler pointed away from you and any  
other people or fragile objects. Remove all four Screws (11) and Washers (23a) on the  
Driver Guide (22a).  
3.  
5.  
6.  
Carefully lift the Driver Guide (22a) off and remove the jammed staple. Pliers may be  
necessary to remove a stuck staple.  
Inspect the driver on the end of the Piston Assembly (9) for bends or breakage. If it is  
damaged, do not use the tool until it is repaired by a qualified technician.  
Lightly oil the driver and replace the Driver Guide (22a). Replace and securely tighten  
all of the Screws (11) and Washers (23a).  
7.  
Reload the Stapler.  
8.  
Reconnect the Stapler to the air hose.  
9.  
Press the tip of the Stapler against an appropriate piece of scrap wood.  
Test fire the Stapler several times, checking for proper operation.  
10.  
11.  
Disconnect the Stapler, remove the staples, and store the Stapler in a location out of  
children’s reach.  
Maintenance  
1.  
2.  
Periodically lubricate all moving parts and pivots with a light oil.  
Wipe down the Floor Stapler with a damp cloth. Do not use harsh detergents or sol-  
vents.  
3.  
Check that the Shoe (28) and the Hammer Face (10) is clear of any dirt or debris.  
PLEASE READTHE FOLLOWING CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDEDTHE PARTS DIAGRAM INTHIS MANUAL  
AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR 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  
OFTHE 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 REPAIRSTOTHE ORIGINAL PRODUCT OR REPLACEMENT PARTSTHERETO, OR  
ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTSTHERETO.  
REV 11/04  
SKU 90399  
For technical questions, please call 1-800-444-3353.  
Page 7  
 
Parts List  
Part  
Part  
Description  
Description  
1
2
3
4
5
6
7
8
9
Cylinder Bushing  
24 Washer  
Plunger  
0-ring  
25 Screw  
26 Screw  
0-ring  
27 Spacer for 25/32" Flooring  
27a Spacer for 1/2" Flooring  
28 Shoe  
Poppet  
0-ring  
0-ring  
29a Pin  
0-ring  
30a Magazine  
31a Magazine Cap  
32a Screw  
Piston Assy.  
10 Hammer Face  
11 Screw  
33a Magazine Cover  
34 Pin  
12 Cylinder Cap  
13 0-ring  
35 Pin  
14 Screw  
36a Sleeve  
15 Washer  
37 Detent Spring  
38 Cover Latch Pin  
40 Tension Spring  
41 Pusher  
16 Poppet Actuator  
17 Gasket  
18 Body  
19 Bumper  
42 Bushing  
19a Screw  
43 Roller  
19b Spring Washer  
19c Baffle Plate  
20b Nose  
44 Clamp Screw  
45 Washer  
46 Nut  
21a Screw  
47 Air Inlet  
22a Blade Guide  
23a Washer  
48 Arm  
49 Hammer  
NOTE: #27a - Spacer for 1/2” Flooring (Included but not installed)  
NOTE: Some parts are listed and shown for illustration purposes only and are  
not available individually as replacement parts.  
REV 11/04; 04/05; 02/06  
SKU 90399  
For technical questions, please call 1-800-444-3353.  
Page 8  
 
Assembly Diagram  
#27 - Installed: (Spacer for 25/32” Flooring)  
#27a - Spacer is included with tool, not installed (Spacer for 1/2” Flooring)  
REV 04/05; 02/06  
SKU 90399  
For technical questions, please call 1-800-444-3353.  
Page 9  
 

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