Central Pneumatic 93760 User manual

FRAMING NAILER
28 DEGREE - FULL CLIP
Model 93760
ASSEMBLY AND OPERATING INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our Web site at: http://www.harborfreight.com
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.
®
©
TO PREVENT SERIOUS INJURY,
READ AND UNDERSTAND ALL WARNINGS
AND INSTRUCTIONS BEFORE USE.
(Due to continuing improvements, actual product may differ slightly from the product described herein.)
®

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 followed 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
electrically powered tools in the presence of flammable 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 93760 For technical questions, please call 1-800-444-3353 PAGE 2
Item Description
Nail Capacity 2-3/16” to 3-9/16” Long x 8 to 10 Gauge / Paper, Plastic, and Wire Collated
Magazine Capacity Up to 90 Nails Per Load
Magazine Angle 28°
Operating PSI 125 PSI Maximum *
Required CFM 12 CFM @ 90 PSI
Air Inlet Size 1/4”-18 NPT
Air Inlet Screen 20 Mesh
Included
Accessories
Goggles (Qty. 1) / Tool Oil (Qty. 1) / Hex Wrenches (Qty. 4)
Carrying Case (Qty. 1)
Included Nails 0.113” Diameter x 2-1/2” Long, Paper Collated, Clip Head Nails (Qty.100)
0.131” Diameter x 3” Long, Wire Collated, Full Head Nails (Qty.102)
Additional Features Full Sequential Firing Safety Mechanism / 360° Adjustable Exhaust
Net Weight 8.5 Pounds
*The air pressure setting must not exceed job site regulations/restrictions. The air pressure setting
must not exceed 90 PSI when being used with work pieces that have a thickness of less than 1-3/4”.
REV 11/06, 01/07

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. 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 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 wrenches. Check that adjusting wrenches are removed
from the tool or machine work surface before attaching to an air source.
12. 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. 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.
SKU 93760 For technical questions, please call 1-800-444-3353 PAGE 3

SKU 93760 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 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 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. 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.
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 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 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.

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.
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.
SKU 93760 For technical questions, please call 1-800-444-3353 PAGE 5
Rev 11/06

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 Assembly (73) of Nails.
3. The Nailer should not fire if the Nose (40) is not depressed against the
workpiece.
4. Make sure the Trigger (58) and Nose (40) move freely, without sticking.
5. 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. 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.
7. 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.
SKU 93760 For technical questions, please call 1-800-444-3353 PAGE 6
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 of Tool Oil (89) to the airline connection. Add a few drops more after each
hour of continual use.
FILTEROILER
REGULATOR
QUICK
COUPLER
QUICK
COUPLER
QUICK
CONNECTOR
QUICK
CONNECTOR
AIR HOSE
Rev 11/06

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.
SKU 93760 For technical questions, please call 1-800-444-3353 PAGE 7
1. Pull the Feeder Shoe (71) all the way to the rear until it latches.
2. Orient a strip of Nails (86, 87) with points down and drop the Nails into the
Magazine (73).
3. Slide the Nails (86, 87) forward in the Magazine (73). The Magazine will hold 90
Nails.
4. 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).
FEEDER SHOE
(71)
MAGAZINE
(73)
INSERT NAIL
HERE
NOSE
(40)
TRIGGER
(58)
Note: This Nailer only uses 280collated nails.

SKU 93760 For technical questions, please call 1-800-444-3353 PAGE 8
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. Rotate the Exhaust Cover (4) so that the exhaust air blast will be directed
away from the operator.
3. 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. 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.
5. 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.
TRIGGER
(58)
NOSE
(40)
QUICK CONNECTOR
(85)
EXHAUST COVER
(4)
MAGAZINE
(73)
Rev 11/06

SKU 93760 For technical questions, please call 1-800-444-3353 PAGE 9
Anytime any maintenance or repairs are done (including clearing jams), FIRST:
1. Disconnect the Nailer from its air supply.
2. Empty the Magazine Assembly (73) 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 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. 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.
2. 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. Remove the two Screws (35). (One Screw on each side of Magazine (73).
4. Remove the two Nuts (76).
5. Slide the Magazine (73) back, off of the Nose (40).
6. After clearing the jammed Nail, re-assemble in reverse order.
MAGAZINE (73) MAGAZINE (73)
NOSE (40)
SCREW
(35) NUT
(76)

Anytime any maintenance or repairs are done, FIRST:
1. Disconnect the Nailer from its air supply.
2. Empty the Magazine Assembly (73) 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 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.
7. Make sure the Nose (40) moves freely.
8. Reload the Nailer with Nails. Then, reconnect the air supply hose to the tool.
9. 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.
INSPECTION, MAINTENANCE, AND CLEANING
1. 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.
2. Clean the external parts of the Nailer with a clean cloth and mild detergent or
non-flammable solvent. Then, dry.
3. Store the tool in a clean, dry, safe location out of reach of children.
4. 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

SKU 93760 For technical questions, please call 1-800-444-3353 PAGE 11
TROUBLESHOOTING
Problem Possible Solution
Air leak near top of tool. 1. Tighten all screws on the cylinder cap. (See Assy. Diagram.)
2. Have a qualified service technician install a head valve piston set.
Tool does not work. 1. Make sure the compressor regulator is set at 90 PSI. (See page 6.)
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.
Sluggish operation. 1. Make sure the compressor regulator is set at 90 PSI. Make sure
compressor used produces sufficient C.F.M. to operate the Nailer.
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. 1. Have a qualified service technician clean the interior of the tool and/or
Replace the bumper or head valve piston set.
Weak driving force. 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.
Too jamming too often. 1. Have a qualified service technician clean the interior of the tool and/or
Lubricate the magazine and install a new magazine spring.
Other problems. 1. Have a qualified service technician check out the tool.

NOTE:
Some parts are listed and shown for illustration purposes only,
and are not available individually as replacement parts.
PARTS LIST
SKU 93760 For technical questions, please call 1-800-444-3353 PAGE 12
Part # Description Part # Description
1 Screw (M5x20) 47 O-Ring (9.5x1.9)
2 Spring Washer (#5) 48 O-Ring (10.3x1.9)
3 Bushing 49 Trigger Valve Head
4 Exhaust Cover 50 O-Ring (12.8x1.9)
5 Seal 51 Spring
6 Screw (M6x30) 52 O-Ring (5.5x1.5)
7 Spring Washer (#6) 53 Trigger Valve Stem
8 Cylinder Cap 54 O-Ring (24.8x2)
9 Gasket 55 Trigger Valve Guide
10 Washer 56 Spring
11 Valve Seat 57 Trigger Spring
12 Spring 58 Trigger
13 O-Ring (57.5x2.6) 59 Spring Pin (2.5x17)
14 O-Ring (72.4x3.5) 60 Rail
15 Valve 61 Washer (#5)
16 Screw (M6x8) 62 Nut (M4)
17 Cylinder Seal 63 Washer (#5)
18 Collar 64 Coil Spring Assembly
19 O-Ring (54.4x4) 65 Pin
20 Piston Assembly 66 Bushing
21 Cylinder 67 Screw (M4x8)
22 O-Ring (72.4x3.5) 68 Block
23 O-Ring (67x3) 69 Spring Washer (#4)
24 Restrictive Plate 70 Screw (M4x12)
25 O-Ring (97.5x3.5) 71 Feeder Shoe
26 Bumper A 72 Screw (M5x14)
27 Bumper B 73 Magazine
28 Body 74 Screw (M4x16)
29 O-Ring (62.3x1.8) 75 Support
30 Nose 76 Nut (M5)
31 Spring Washer (#8) 77 Lock
32 Screw (M8x25) 78 Torsion
33 Spring 79 Bushing
34 Safety Bracket A 80 Nut (M4)
35 Screw (M5x12) 81 Nut (M6)
36 Bushing 82 Soft Grip Sleeve
37 Safety Bracket B 83 O-Ring (65.4x2.5)
38 Washer 84 End Cap
39 Screw (M5x10) 85 Quick Connector
40 Nose 86 Nails (0.131” Dia. x 3” Long, Wire Collated, Full Head, Qty. 100)
41 Seal 87 Nails (0.113” Dia. x 2-1/2” Long, Paper Collated, Clip Head, Qty. 100)
42 Pin 88 Goggles
43 Safety Guide 89 Tool Oil
44 O-Ring (20.3x2.5) 90 Hex Wrenches (Set of 3)
45 O-Ring (20.3x1.5) 91 Carrying Case
46 Valve Set

ASSEMBLY DIAGRAM
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
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.

SKU 93760 For technical questions, please call 1-800-444-3353 PAGE 14
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.
LIMITED 1 YEAR
3491 Mission Oaks Blvd. • • Camarillo, CA 93011 • [phone]
®
apply to damage due directly or indirectly to misuse, abuse, negligence or accidents; repairs or
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.
bear the cost of returning the product.
state to state.
WARRANTY
P.O. Box 6009
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
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
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
This warranty gives you specific legal rights and you may also have other rights which vary from