Craftsman 320.66810 User Manual

Operator's Manual

20.0-Volt Lithium-ion Cordless

1/2-in. impact Wrench

Model No. 320.66810

Powered by an
ENERGYSTAR_

qualified battery

_ better environment

the user must read and understand
this Operator's manual before using

this product.

charger for a

WARNING: To reduce the risk of injury,

Charge battery before first use

• Warranty

• Safety

• Assembly

• Operation

• Maintenance

Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.

www.craftsman.com

2341141001

Warranty Page 2

Safety Symbols Page 3
Safety Instructions Pages 5-12
Description Pages 13-14

Assembly Page 14

Operation Pages 15-22
Maintenance Pages 22-23

Troubleshooting Page 24

Exploded View and Parts List Pages 25-27
Sears Repair Parts Phone Number Back Cover

ONE YEAR FULL WARRANTY ON CRAFTSMAN® PROFESSIONAL
TOOL

If this Craftsman professional tool fails to give complete satisfaction within
one year from the date of purchase, return it to any Sears store or Parts &

Repair Center or other Craftsman outlet in the United States for free repair
(or replacement, if repair proves impossible).

This warranty does not include expendable parts such as lamps, batteries,
bits, or blades.

This warranty gives you specific legal rights, and you may also have other
rights which vary from state to state.

Sears, Roebuck and Co., Hoffman Estates IL 60179

iNTRODUCTiON

SAVE THESE iNSTRUCTiONS!

This cordless Impact Wrench has many features for making its use more

pleasant and enjoyable. Safety, performance, and dependability have been given

top priority in the design of this product, making it easy to maintain and operate.

,_ WARNING: Some dust created by using power tools contains chemicals

known to the state of California to cause cancer and birth defects or other

reproductive harm.

668t0 ManuaLRevised_09 0407 Page 2

The purpose of safety symbols is to attract your attention to possible dangers.
The safety symbols and the explanations with them deserve your careful

attention and understanding. The symbol warnings do not, by themselves,
eliminate any danger. The instructions and warnings they give are no substitutes

for proper accident-prevention measures.

_, WARNING: Be sure to read and understand all safety instructions in this
manual, including all safety-alert symbols such as "DANGER," "WARNING," and
"CAUTION," before using this Impact Wrench. Failure to follow all instructions

listed below may result in electric shock, fire, and/or serious personal injury.

SAFETY SYMBOL MEANNING

,_ DANGER: Indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury.

,_ WARNING: Indicates a imminently hazardous situation, which, if not
avoided, could result in death or serious injury.

,_ CAUTION: Indicates an potentially hazardous situation, which, if not

avoided, may result in death or serious injury.

NOTE: (Without Safety Alert Symbol) Indicates a situation that may result in
property damage.

,_ WARNING: To ensure safety and reliability, all repairs should be performed
by a qualified service technician at a Sears Service Center.

,_ WARNING: The operation of any power tool can result in
foreign objects being thrown into your eyes, which can result in
severe eye damage. Before beginning power tool operation,

always wear safety goggles or safety glasses with side shields
and a full-face shield when needed. We recommend a Wide

Vision Safety Mask for use over eyeglasses or standard safety
glasses with side shields. Always use eye protection that is

marked to comply with ANSI Z87.1

SAVE THESE INSTRUCTIONS

668t0 ManuaLRevised_09 0407 Page 3

Some of these following symbols may be used on this tool. Please study them
and learn their meaning. Proper interpretation of these symbols will allow you to

operate the tool better and safer.

SYMBOL NAME DESIGNATION/EXPLANATION

V Volts Voltage

A Amperes Current

Hz Hertz Frequency (cycles per second)

W Watt Power

min Minutes Time

Alternating Current Type of current

Direct Current Type or a characteristic of current

n o No Load Speed Rotational speed, at no load

] Class II Construction Double-insulated construction

.../min Per Minute Revolutions, strokes, surface speed,

Wet Conditions Alert Do not expose to rain or use in damplocations.

Read The Operator's Manual read and understand operator's manual

Eye Protection glasses with side shields and a full face

Safety your safety.

Alert Precautions that involve

No Hands Symbol blade will result in serious personal injury.

No Hands Symbol blade will result in serious personal injury.

No Hands Failure to keep your hands away from the

No Hands Symbol blade will result in serious personal injury.

Symbol

Hot Surface To reduce the risk of injury or damage,avoid contact with any hot surface.

orbits, etc., per minute

To reduce the risk of injury, user must
before using this product.

Always wear safety goggles or safety
shield when operating this product.

Failure to keep your hands away from the

Failure to keep your hands away from the

blade will result in serious personal injury.

Failure to keep your hands away from the

66810 Manual_Revised_09 0407 Page 4

GENERAL POWER TOOL SAFETY WARNINGS

WARNING: Read all safety warnings and instructions. Failure to follow the

warnings and instructions may result in electric shock, fire and/or serious injury.
The term "power tool" in all of the warnings listed below refers to corded power

tools or battery-operated (cordless) power tools.
SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE.

The term "power tool" in the warnings refers to your mains-operated (corded)

power tool or battery-operated (cordless) power tool.

WORK AREA SAFETY

* Keep your work area clean and well lit. Cluttered or dark areas invite accidents
* Do not operate power tools in explosive atmospheres, such as in the

presence of flammable liquids, gases or dust. Power tools create sparks

which may ignite the dust or fumes.

* Keep children and bystanders away while operating a power tool.

Distractions can cause you to lose control.

ELECTRICAL SAFETY

• Avoid body contact with earthed or grounded surfaces such as pipes,
radiators, ranges and refrigerators. There is an increased risk of electric shock
if your body is earthed or grounded.

Power tool plugs must match the outlet. Never modify the plug in any

way. Do not use any adapter plugs with earthed (grounded) power tools.

Unmodified plugs and matching outlets will reduce the risk of electric shock.
Do not expose power tools to rain or wet conditions. Water entering a power

tool will increase the risk of electric shock.

* Do not abuse the cord. Never use the cord for carrying, pulling or unplugging

the power tool. Keep the cord away from heat, oil, sharp edges or moving

parts. Damaged or entangled cords increase the risk of electric shock.

* When operating a power tool outdoors, use an extension cord suitable for

outdoor use. Use of a cord suitable for outdoor use reduces the risk of

electric shock.

• If operating a power tool in a damp location is unavoidable, use a residual

current device (RCD) protected supply. Use of an RCD reduces the risk of

electric shock.
Use the battery only with the charger listed:

BATTERY PACK CHARGER

320.25708 320.25709

66810 Manual_Revised_09 0407 Page 5

PERSONAL SAFETY

• Stay alert, watch what you are doing and use common sense when operating

a power tool. Do not use a power tool while you are tired or under the

influence of drugs, alcohol or medication. A moment of inattention while

operating power tools may result in serious personal injury.

Use personal protective equipment. Always wear eye protection. Protective
equipment such as dust mask, non-skid safety shoes, hard hat, or hearing
protection used for appropriate conditions will reduce personal injuries.

Prevent unintentional starting. Ensure the switch is in the off-position before

connecting to power source and/or battery pack, picking up or carrying the
tool. Carrying power tools with your finger on the switch or energising power

tools that have the switch on invites accidents.

Remove any adjusting key or wrench before turning the power tool on. A

wrench or a key left attached to a rotating part of the power tool may result

in personal injury.
Do not overreach. Keep proper footing and balance at all times. This enables

better control of the power tool in unexpected situations.
Dress properly. Do not wear loose clothing or jewelry. Keep your hair,

clothing and gloves away from moving parts. Loose clothes, jewelry or long

hair can be caught in moving parts.
If devices are provided for the connection of dust extraction and collection

facilities, ensure these are connected and properly used. Use of dust
collection can reduce dust-related hazards.

Use clamps or another practical way to support and secure the workpiece

to a stable platform. Holding the work by hand or against your body leaves it

unstable and may lead to loss of control.
Do not use on a ladder or unstable support. Stable footing on a solid surface

enables better control of the power tool in unexpected situations.
Keep handles dry, clean, and free from oil and grease. Slippery hands cannot

safely control the power tool.
Always wear safety glasses with side shields. Everyday glasses may have

impact-resistant lenses, but they are NOT safety glasses. Following this rule

will reduce the risk of eye injury.

Protect your lungs. Wear a face or dust mask if the operation is dusty.
Following this rule will reduce the risk of serious personal injury.

Protect your hearing. Wear hearing protection during extended periods of

operation. Following this rule will reduce the risk of serious person injury.

66810 ManuaLRevised_09 0407 Page 6

POWER TOOL USE AND CARE

• Do not force the power tool. Use the correct power tool for your application.

The correct power tool will do the job better and safer at the rate for which it
was designated.

Do not use the power tool if the switch does not turn it ON and OFF. Any
power tool that cannot be controlled with the switch is dangerous and must

be repaired.
Disconnect the plug from the power source and/or the battery pack from the

power tool before making any adjustments, changing accessories, or storing
power tools. Such preventive safety measures reduce the risk of starting the

power tool accidentally.
Store idle power tools out of the reach of children and do not allow persons

unfamiliar with the power tool or these instructions to operate the power tool.
Power tools are dangerous in the hands of untrained users.

Maintain power tools. Check for misalignment or binding of moving parts,
breakage of parts and any other condition that may affect the power tool's

operation. If damaged, have the power tool repaired before use. Many
accidents are caused by poorly maintained power tools.

Keep cutting tools sharp and clean. Properly maintained cutting tools with

sharp cutting edges are less likely to bind and are easier to control.

Use the power tool, accessories and tool bits etc. in accordance with these
instructions, taking into account the working conditions and the work to be

performed. Use of the power tool for operations different from those intended

could result in a hazardous situation.

Hold power tools by insulated gripping surfaces when performing an

operation where the cutting tool may contact hidden wiring or its own cord.

Contact with a "live" wire will make exposed metal parts of the tool "live" and

shock the operator.

Know your power tool. Read the product manual carefully. Learn the

applications and limitations, as well as the specific, potential hazards related
to this tool. Following this rule will reduce the risk of electric shock, fire or

serious injury.

Save these instructions. Refer to them frequently and use them to instruct

others who may use this tool. If you lend this tool to someone else, also lend
them these instructions.

66810 ManuaLRevised_09 0407 Page 7

BATTERY TOOL USE AND CARE

• Make sure that the switch is in the OFF position before inserting the battery
pack. Inserting the battery pack into power tools that have the switch ON

invites accidents.
Recharge only with the charger specified by the manufacturer. A charger that

is suitable for one type of battery pack may create a risk of fire when used

with another battery pack.

Use power tools only with specifically designated battery packs. Use of any

other battery packs may create a risk of injury and fire.
When the battery pack is not in use, keep it away from other metal objects,

like paper clips, coins, keys, nails, screws or other small metal objects, that

can make a connection from one terminal to another. Shorting the battery
terminals together may cause burns or a fire.

Under abusive conditions, liquid may be ejected from the battery; avoid

contact. If contact accidentally occurs, flush with water. If liquid contacts

eyes, additionally seek medical help. Liquid ejected from the battery may

cause irritation or burns.

Battery tools do not have to be plugged into an electrical outlet; therefore,

they are always in operating condition. Be aware of possible hazards when

not using your battery tool or when changing accessories. Following this rule

will reduce the risk of electric shock, fire, or serious personal injury.

Do not place battery tools or their batteries near fire or heat. This will reduce

the risk of explosion and possible injury.

Do not crush, drop or damage the battery pack. Do not use a battery pack

or charger that has been dropped or received a sharp blow. A damaged

battery is subject to explosion. Properly dispose of a dropped or damaged
battery immediately.

A damaged battery is subject to explosion. Properly dispose of a dropped or
damaged battery immediately.

Batteries vent hydrogen gas and can explode in the presence of a source of
ignition, such as a pilot light. To reduce the risk of serious personal injury,
never use any cordless product in the presence of open flame. An exploded

battery can propel debris and chemicals. If exposed to such debris or

chemicals, immediately flush the exposed area with water.

Do not charge a battery tool in a damp or wet location. Following this rule will
reduce the risk of electric shock.

Under extreme usage or temperature conditions, battery leakage may occur.
If contact accidentally occurs, flush with water. If liquid contacts eyes, seek

medical help. Liquid ejected from the battery may cause irritation or burns.
If liquid from the battery comes in contact with your skin, wash immediately

with soap and water, then neutralize with lemon juice or vinegar.

66810 ManuaLRevised_09 0407 Page 8

• If liquid from the battery gets in your eyes, flush them with clean water for at
least 10 minutes, and then seek immediate medical attention. Following this

rule will reduce the risk of serious personal injury.

SERVICE

Have your power tool serviced by a qualified repair person using only identical
replacement parts. This will ensure that the safety of the power tool is

maintained.

®

When servicing a power tool, use only identical replacement parts.

®

Follow instructions in the Maintenance section of this manual. Use of
unauthorized parts or failure to follow Maintenance instructions may create a

risk of shock or injury.

SPECiFiC SAFETY RULES FOR CORDLESS iMPACT WRENCH

Hold power tools by insulated gripping surfaces when performing an operation

where the cutting tool may contact hidden wiring or its own cord. Contact with
a "live" wire will make exposed metal parts of the tool "live" and shock the

operator.

Use clamps or other practical way to support and secure the workpiece to a

stable platform. Holding the work by hand or against your body is unstable
and may lead to loss of control.

Do not drill, fasten or break into existing walls or other blind areas where
electrical wiring may exist. If this situation is unavoidable, disconnect all

fuses or circuit breakers supplying the worksite.
Always wear safety goggles or eye protection when using this tool.

Bits, sockets, and tools get hot during operation. Wear gloves when

touching them.
Wear ear protectors when using the tool for extended periods. Prolonged

exposure to high intensity noise can cause hearing loss.
Use thick, cushioned gloves and limit the exposure time by taking frequent

rest periods. Vibration caused by hammer-drill or Imapct wrench action may
be harmful to your hands and arms.

Secure the material being fastened. Never hold it in your hand or across your
legs. Unstable support can cause loss of control and injury.

Avoid accidental starting. Be sure the forward/reverse switch is in the OFF

position before inserting a battery pack. Carrying appliances with your finger

on the switch or inserting the battery pack into an appliance with the switch
on invites accidents.

Remove battery pack before changing accessories. Accidental starting may occur
because battery appliances with a battery inserted are in the operative condition.

Be prepared for a reaction torque when "seating" or removing a fastener. The

tool housing may tend to twist in the opposite direction of bit rotation when

"seating" or removing a fastener, depending on the torque setting of the tool.

66810 ManuaLRevised_09 0407 Page 9