Central Pneumatic Air Compressor 99792 User Manual

HEAVY-DUTY

AIR CHIPPING HAMMER

99792

SET UP AND OPERATING INSTRUCTIONS

Distributed exclusively by Harbor Freight Tools®.

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our website at: http://www.harborfreight.com

Read this material before using this product.

Failure to do so can result in serious injury.
SAVE THIS MANUAL.

Copyright© 2008 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. Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein. Tools required for
assembly and service may not be included.

For technical questions or replacement parts, please call 1-800-444-3353.

Manual Revised 11h

CONTENTS

TROUBLESHOOTING ......................14

SAFETY ALERT SYMBOL AND

SIGNAL WORDS .............................3

IMPORTANT SAFETY

INSTRUCTIONS .......................... 3

GENERAL ...........................................3

WORK AREA ...................................... 3

PERSONAL SAFETY .........................4

TOOL USE AND CARE ...................... 4

SERVICE ............................................5

AIR SOURCE ......................................5

SYMBOLS AND SPECIFIC

SAFETY INSTRUCTIONS ........... 5

SYMBOL DEFINITIONS ..................... 5

SPECIFIC SAFETY INSTRUCTIONS 6

VIBRATION PRECAUTIONS ........ 7

PARTS LIST ................................. 15

ASSEMBLY DIAGRAM ................ 16

LIMITED 1 YEAR WARRANTY ... 17

FUNCTIONAL DESCRIPTION ....... 8

SPECIFICATIONS ..............................8

INITIAL TOOL SET UP/

ASSEMBLY .................................. 8

UNPACKING .......................................8

AIR SUPPLY ....................................... 8

INSTALLING A CHISEL .....................9

WORK PIECE AND WORK AREA

SET UP .......................................... 11

GENERAL OPERATING

INSTRUCTIONS ............................ 11

CHIPPING IN A STRAIGHT

LINE: .........................................12

BREAKING UP CONCRETE: .....12

USER-MAINTENANCE

INSTRUCTIONS ........................ 13

CLEANING, MAINTENANCE, AND

LUBRICATION ............................... 13

SKU 99792 For technical questions, please call 1-800-444-3353. Page 2

SAVE THIS MANUAL

Keep this manual for the safety warn­ings and precautions, assembly, operat­ing, inspection, maintenance and cleaning
procedures. Write the product’s serial
number in the back of the manual near the
assembly diagram (or month and year of
purchase if product has no number). Keep
this manual and the receipt in a safe and
dry place for future reference.

NOTICE is used to

address practices

not related to personal injury.

CAUTION, without

the safety alert
symbol, is used to address
practices not related to
personal injury.

IMPORTANT SAFETY

Safety Alert Symbol and Signal

Words

In this manual, on the labeling,
and all other information provid­ed with this product:

This is the safety alert

symbol. It is used to alert
you to potential personal
injury hazards. Obey all
safety messages that
follow this symbol to avoid
possible injury or death.

DANGER indicates

a hazardous
situation which, if not
avoided, will result in death or
serious injury.

WARNING

indicates a
hazardous situation which, if
not avoided, could result in
death or serious injury.

CAUTION, used

with the safety
alert symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate injury.

INSTRUCTIONS

INSTRUCTIONS PERTAINING

TO A RISK OF FIRE,

ELECTRIC SHOCK, OR

INJURY TO PERSONS

WARNING – When using tools, basic pre-

cautions should always be followed,
including the following:

General

a. To reduce the risks of electric

shock, re, and injury to persons,

read all the instructions before us­ing the tool.

Work area

a. Keep the work area clean and well

lighted. Cluttered benches and dark

areas increase the risks of electric

shock, re, and injury to persons.

b. Do not operate the tool in explo-

sive atmospheres, such as in the

presence of ammable liquids,

gases, or dust. The tool is able to
create sparks resulting in the ignition
of the dust or fumes.

c. Keep bystanders, children, and

visitors away while operating the

SKU 99792 For technical questions, please call 1-800-444-3353. Page 3

tool. Distractions are able to result in
the loss of control of the tool.

conditions. Wear heavy-duty work
gloves during use.

Personal safety

a. Stay alert. Watch what you are do-

ing and use common sense when
operating the tool. Do not use the
tool while tired or under the inu­ence of drugs, alcohol, or medica­tion. A moment of inattention while

operating the tool increases the risk

of injury to persons.

b. Dress properly. Do not wear loose

clothing or jewelry. Contain long
hair. Keep hair, clothing, and
gloves away from moving parts.

Loose clothes, jewelry, or long hair
increases the risk of injury to persons

as a result of being caught in moving
parts.

c. Avoid unintentional starting. Be

sure the switch is off before con­necting to the air supply. Do not

carry the tool with your nger on the

switch or connect the tool to the air
supply with the switch on.

d. Remove adjusting keys and

wrenches before turning the tool
on. A wrench or a key that is left at-

tached to a rotating part of the tool

increases the risk of personal injury.

g. Always wear eye protec-

tion. Wear ANSI-ap-

proved safety goggles.

h. Always wear hearing

protection when using
the tool. Prolonged expo-

sure to high intensity noise

is able to cause hearing loss.

a. DANGER! Keep hands and body

away from cutting area and chisel.
Keep your second hand on aux­iliary handle or motor housing.

Contact with the chisel could result in

serious injury.

b. Explore the workarea to avoid

contact with hidden wiring or pip­ing. Thoroughly inspect the workarea

for possible hidden wiring or piping
before performing work. Contact with
live wiring will shock the operator.

Tool use and care

a. Use clamps or another practical

way to secure and support the
workpiece to a stable platform.

Holding the work by hand or against
the body is unstable and is able to
lead to loss of control.

e. Do not overreach. Keep proper

footing and balance at all times.

Proper footing and balance enables
better control of the tool in unexpect­ed situations.

f. Use safety equipment. A

dust mask, non-skid safety
shoes and a hard hat must
be used for the applicable

SKU 99792 For technical questions, please call 1-800-444-3353. Page 4

b. Do not force the tool. Use the

correct tool for the application. The

correct tool will do the job better and

safer at the rate for which the tool is
designed.

c. Do not use the tool if the switch

does not turn the tool on or off.

Any tool that cannot be controlled
with the switch is dangerous and
must be repaired.

d. Disconnect the tool from the air

source before making any adjust­ments, changing accessories, or
storing the tool. Such preventive

safety measures reduce the risk of
starting the tool unintentionally. Turn
off and detach the air supply, safely
discharge any residual air pressure,
and release the throttle and/or turn
the switch to its off position before
leaving the work area.

e. Store the tool when it is idle out of

reach of children and other un­trained persons. A tool is dangerous

in the hands of untrained users.

f. Maintain the tool with care. Keep a

cutting tool sharp and clean. A prop­erly maintained tool, with sharp cut­ting edges reduces the risk of binding
and is easier to control.

g. Check for misalignment or bind-

ing of moving parts, breakage of
parts, and any other condition that
affects the tool’s operation. If dam-

aged, have the tool serviced before
using. Many accidents are caused
by poorly maintained tools. There is a
risk of bursting if the tool is damaged.

c. Use only the lubricants supplied

with the tool or specied by the

manufacturer.

Air source

a. Never connect to an air

source that is capable of
exceeding 90 psi. Over

pressurizing the tool may

cause bursting, abnormal operation,

breakage of the tool or serious injury

to persons. Use only clean, dry,
regulated compressed air at the rated
pressure or within the rated pressure
range as marked on the tool. Always
verify prior to using the tool that the

air source has been adjusted to the

rated air pressure or within the rated
air-pressure range.

b. Never use oxygen, carbon dioxide,

combustible gases or any bottled
gas as an air source for the tool.

Such gases are capable of explosion

and serious injury to persons.

SAVE THESE

INSTRUCTIONS.

h. Use only accessories that are

identied by the manufacturer for
the specic tool model. Use of an

accessory not intended for use with

the specic tool model, increases the
risk of injury to persons.

SYMBOLS AND

SPECIFIC SAFETY

INSTRUCTIONS

Symbol Denitions

Service

a. Tool service must be performed

only by qualied repair personnel.

b. When servicing a tool, use only

identical replacement parts. Use
only authorized parts.

SKU 99792 For technical questions, please call 1-800-444-3353. Page 5

Symbol Property or statement

n

o

.../min

PSI

No-load speed

Revolutions or reciprocation per
minute

Pounds per square inch of pressure

Chart continued in next column.

Symbol Denitions

Symbol Property or statement

ft-lb

BPM

CFM

SCFM

NPT

NPS

Foot-pounds of torque

Blows per minute

Cubic Feet per Minute ow

Cubic Feet per Minute ow at

standard conditions

National pipe thread, tapered

National pipe thread, straight

WARNING marking concerning Risk

of Eye Injury. Wear ANSI-approved

eye protection.

WARNING marking concerning Risk
of Hearing Loss. Wear hearing
protection.

WARNING marking concerning Risk

of Respiratory Injury. Wear NIOSH-

approved dust mask/respirator.

WARNING marking concerning Risk
of Explosion.

Specic Safety Instructions

1. Always disconnect tool from its com­pressed air supply source before per­forming any services or maintenance,
Such as cleaning the tool, moving to
a different work location, handing the
tool to another person, etc.

Caution: After disconnecting the TOOL

from the air compressor, the TOOL
may still be pressurized. Point the
TOOL onto an extra piece of work
surface and depress the trigger until
all pressure is released. Also:

a. Never use combustible gas as a

power source.

b. Never operate this tool at greater

than 90 PSI operating pressure.

Warning: People with pacemakers should

consult their physician(s) before us­ing this product; operation of equip­ment in close proximity to a heart
pacemaker could cause interference
or failure of the pacemaker.

2. 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 equipment, such as
those dust masks that are specially

designed to lter out microscopic

particles.

3. The warnings and precautions dis­cussed in this 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.

4. WARNING: Some dust created by
power sanding, sawing, grinding, drill­ing, and other construction activities,
contains 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

SKU 99792 For technical questions, please call 1-800-444-3353. Page 6