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AIR HAMMERAIR HAMMER
AIR HAMMER
AIR HAMMERAIR HAMMER
WITH TWO CHISELSWITH TWO CHISELS
WITH TWO CHISELS
WITH TWO CHISELSWITH TWO CHISELS
92037
ASSEMBLY AND OPERATING INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our W eb site at http://www.harborfreight.com
Copyright © 2004 by Harbor Freight Tools®. All rights reserved. No por tion 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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Specifications
Air Pressure Require m ent 90 PSI M ax, 4 CFM (Average)
A ir In le t Size ¼ in c h , 18 N PT
Chisel S hank S ize 10 m m standard (0 .395 inc hes)
BPM 4,500
Chisels Included 1 – flat and 1 – pointed
Item Description
150m m Length
Save This Manual
You will need the manual for the safety w arnings and precautions, assembly
instructions, operating and maintenance procedures, parts list and diagram. K eep
your invoice with this man ual. Write the invoice number on the inside of the front
cover. Keep the manual and in v oice in a safe and dry place for future ref erence .
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 pow er tools in
damp or wet locations. Don’t e xpose to rain. Keep work area well lighted.
3. Keep children away. Children must never be allowed in the work area. Do
not let them handle machines, tools, or extension cords .
4. Store idle equipment. When not in use, tools m ust be stored in a dry
location to inhibit rust. Always lock up tools and keep out of reach of children.
5. Do not force tool. It will do the job better and more saf ely at the r ate f or
which it was intended. Do not use inappropriate attachments in an attempt to
exceed the tool capacity.
6. Use the right tool for the job. Do not attempt to f orce a small tool or
attachment to do the work of a larger industrial tool. There are certain
applications for which this tool was designed. Do not modify this tool and do
not use this tool for a purpose for which it was not intended.
7. Dress properly. Do not w ear loose clothing or jew elry as they can be caught
in moving parts. Protectiv e, electrically nonconductiv e clothes and nonskid
footwear are recommended when working. Wear restrictive hair covering to
contain long hair.
REV 03/05
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8. Use eye and ear protection. Always wear ANSI approved impact safety
glasses and full face shield. Wear an ANSI approved dust mask or respirator
when working around metal, wood, and chemical dusts and mists. Wear ear
plugs.
9. Do not overreach. Keep proper footing and balance at all times. Do not
reach over or across running machines.
10. Maintain tools with care. Keep tools sharp and clean for better and safer
performance. F ollow instructions for lubricating and changing accessories.
Inspect tool 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. Remove adjusting keys and wrenches. Check that keys and adjusting
wrenches are removed from the tool or machine work surface before
plugging it in.
12. 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. Appro v ed accessories are
available from Harbor Freight Tools.
13. Check for damaged parts. Bef ore using any tool, any part that appears
damaged should be carefully checked to determine that it will operate
properly and perform its intended function. Chec k for alignment and binding
of moving parts; any broken parts or mounting fixtures; and an y other
condition that may affect proper oper ation. Any part that is damaged 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.
14. Stay alert. Watch what you are doing, use common sense. Do not oper ate
any tool when you are tired.
15. Do not operate tool if under the influence of alcohol or drugs. Read
warning labels on prescriptions to determine if your judgment or reflexes are
impaired while taking drugs. If there is an y doubt, do not operate the tool.
16. Maintenance. F or y our saf ety, service and maintenance should be
performed regularly by a qualified technician.
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 fr om chemicall y treated lumber
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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 appr oved safety equipment, suc h as those dust
masks that are specially designed to filter out microscopic particles. (Califor nia Health & Safety Code 25249.5, et seq. )
Warning: The brass components of this product contain lead, a chemical
known to the State of California to cause birth defects (or other reproductive
harm). (California Health & Safety Code 25249.5 et seq.)
Note: P erf ormance of this tool may v ary depending on variations in supply air pres-
sure.
Additional Air Hammer Safety Precautions
1. Disconnect air before servicing. Do not attempt to change chisels,
disassemble, or service tool with air hose attached.
2. Use only specified operating air pressure. Ne ver operate tool above the
specified operating air pressure range.
3. Do not use combustible gases. Do not use comb ustib le gases as a power
source, or use tool in areas where combustible gases are stored.
4. Avoid possible kic kbac k injury. Hold the tool with both hands during
operation so that your head and body are not injured by possib le kic kbac k of
the tool.
5. Use care when transporting tool. Disconnect tool from air supply when
moving tool in the workplace. Carry tool only by the handle without dra wing
the trigger.
6. OSHA Guidelines. Industrial applications must follow OSHA guidelines .
7. Air Compressor. Read and adhere to all warnings and instructions in the Air
Compressor Instruction Manual.
Warning: The warnings, cautions, and instructions discussed in this in-
struction manual cannot cover all possible conditions and situations that ma y
occur. It m ust 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 the parts are included. Refer to the
Assembly Drawing and Parts List at the end of this manual. If any parts are
missing or broken, please call Harbor Freight Tools at the number on the cover of
this manual.
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Assembly
The Air Hammer comes completely assembled, except for any air inlet fittings.
Note: Use pipe thread seal or T eflon tape on all threaded connections.
Air Connection
1. Attach a 1/4” NPT plug (not supplied) into the Air Inlet (9) fitting. A fitting is
necessary before a connection can be made to an Air Compressor.
2. For easy connection or removal, attach an Air Quick Coupler (not supplied)
hose on the compressor.
3. Retighten all couplings and fittings.
Oiler and Filter Connection
Dirt, water, and the lack of pneumatic tool oil are major causes f or tool wear. Install
an optional oiler-filter, as illustrated below f or better perf ormance.
Connect the air tool, air hoses, filter, and oiler to the Compressor Air Outlet as
illustrated below . The filter and oiler (not supplied) are recommended but not
mandatory for operation.
If the filter and oiler are not used, connect the air hose directly to the 1/4 inch, 18
NPT connector located at the Air Inlet (9) fitting. Also, a few drops of pneumatic
tool oil must be added through the air line before each use.
Operation
Attach Chisel to Air Hammer
1. Remove air supply hose from the Air Hammer .
2. Unscrew the Retainer Spring (15) from the Cylinder (14). Ref er to the photo
on the next page.
3. Insert the 10 mm Chisel shank into the Cylinder (14).
4. Screw in the Retainer Spring completely onto the threads of the Cylinder (14)
until it stops, to solidly hold the Chisel in place.
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Pointed
Chisel
Cylinder (14)
Retainer Spring (15)
Trigger (16)
Air Inlet (9)
Regulator (4)
Chiseling Operation
W arning: Do not operate the Air Hammer unless the Retainer Spring (15) is
screwed completely onto the Cylinder (14). Otherwise, the chisel could fly out of
the Cylinder causing injury .
1. Set the (1.5 HP minimum) air compressor pressure regulator to 90 PSI.
2. Connect the compressor air hose (minimum 3/8” I.D.) to the Air Inlet (9) on
the handle of the Air Hammer.
If an oiler is not used, add a few drops of pneumatic tool oil into the Air Inlet
(9) before connecting the air hose. If any air is leaking after the connection,
disconnect the air hose and repair the leak.
3. Put on the impact safety glasses, full f ace shield, and ear plugs.
4. While holding the Air Hammer with both hands, squeeze the Trigger (16) to
begin chiseling.
Let the Air Hammer do the work. Do not lay into the Air Hammer with great
force.
5. If necessary, turn the Regulator (4) to adjust the air flow within the Air
Hammer.
6. When finished chiseling, release the Trigger (16), and remove the air supply
hose.
7. Place the chisel against a piece of scrap and squeeze the Trigger again to
release any remaining air pressure in the Air Hammer .
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Maintenance
1. After each use, wipe the Air Hammer with a clean cloth to remove an y dirt
and grease buildup .
2. To maintain tool life, alwa ys lubricate the air line by adding a f e w drops of
pneumatic tool oil to the air line (or Air Inlet) before each use. Or, install the
automatic oiler-filter system as illustrated on page 5.
3. Before each use, drain water out of the air compressor tank and
condensation from the air lines. Ref er to the Air Compressor Oper ation
Manual.
4. Periodically check and clean out the Cylinder chisel hole.
5. Before each use, check the chisels for cracks, breaks, or any unusual signs
of wear. Do not use if damaged.
Parts List
Item Description Qty Item Description Qty
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Rear Valve 1 20. Chise l, P o int ed 1
Body 1 11. Valve Disk 1
Rubber Gasket 1 12. Front Valve 1
O-ring 2 13. Piston 1
Regulator 1 14. Cylinder 1
Control Pin 1 15. Retainer Spring 1
O-ring 1 16. Trigger 1
Ball 1 17. Pin 1
Spring 1 18. Pin 1
Air Inlet 1 19. Chisel, Flat 1
NOTE: Some parts are listed and shown for illustration purposes only and
are not available individually as replacement parts.
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM
IN THIS 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 PAR TS 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 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.
SKU 92037 For technical questions, please call 1-800-444-3353 Page 7
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Assembly Drawing
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