Craftsman 875.168820 User Manual

1/2 in. impact Wrench

@

Owner's lVlanuai
Model No. 875.168820

Unpacking

When unpacking this product, carefully

inspect for any damage that may have

occurred during transit. Make sure any

loose fittings, bolts, etc. are tightened
before putting this product into service.

WARNING: Please read and save these safety and operating instructions. Read carefully

before attempting to assemble, install, operate or maintain the product described.
Protect yourself and others by observing all safety information. Failure to comply with
instructions could result in personal injury and/or property damager. Retain instructions

for future reference.

Sears, Roebuck and Co., Hoffman Estates, IL 60179

www.CRAFTSMAN.com

Owner's Manual Model No. 875.168820 Owner's Manual Model No. 875.168820

90 PSI Maximum

This toot is designed to operate at an air

Features & Benefits
Specifications

Product Warranty
Compressor Requirements
Important Safety Instructions
Installation and Operation

Maintenance
Exploded View Drawing & Parts List

Troubleshooting

The Craftsman Model 875.16882 0 1/2"
Square Drive Impact Wrench is ideal for

general assembly, automotive, agricultural
and industrial applications.

Drive size ........................................... 1/2"

Impacts per minute ..................... 650 IPM

Free speed (No Load) ........... 7,400 RPM

Ultimate torque ........................ 400 ft. Ibs.

Weight ............................................ 4.14 Ibs.

Overall length ................................. 7.47 in.

Average air consumption ........ 5.2 SCFM

Recommended hose size .......... 3/8"1.D.

Air inlet ....................................... 1/4" NPT

Maximum Air Pressure .................. 90 PSI

ONE YEAR FULL WARRANTY ON
CRAFTSMAN TOOL

If this Craftsman 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).

If this Craftsman tool is ever used for

commercial or rental purposes, this
warranty applies for only 90 days from the

date of purchase.

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

Light Use - 26 Gallon

Typical Use - 33 Gallon

Heavy Use - 60 Gallon Professional

Read Operating Instructions

Please become familiar with all the
instructions and warnings before

operating any pneumatic toot.

Always Wear Approved Eye Protection

Impact resistant eye protection should

meet or exceed the standards set forth in

ANSI Z87.1, Occupational and

Educational Eye and Face Protection.
Look for marking Z87.1 on your eye

protection to ensure that it is an approved
style.

Hearing Protection is Recommended
Hearing protection should be used when
the noise level exposure equals or

exceeds an 8 hour time-weighted average
sound level of 85dBA. Process noise,

reflective surfaces, other tools being
operated nearby, all add to the noise level

in a given work area. If you are unable to
determine your noise level exposure, we

recommend the use of hearing protection.

Avoid Prolonged Exposure to Vibration

Pneumatic tools can vibrate during use.
Prolonged exposure to vibration or very

repetitive hand and arm movements can
cause injury. Discontinue the use of any
toot if you experience tingling, numbness,

discomfort or pain in your hands or arms.
You should consult your physician before
resuming use of toot.

pressure of 90 pounds per square inch

gauge pressure (90 PSI) maximum, at the
tool. Use of higher air pressure can, and

may cause injury. Also, the use of higher
air pressure places the internal

components under loads and stresses

they were not designed for, causing

premature toot failure.

California Prop 65
Some dust created by power sanding,

sawing, grinding, drilling and other

construction activities contains
chemicals known to cause cancer, birth

defects or other reproductive harm.
Some examples of these chemicals are:

Lead from lead based paint, crystalline

silica from bricks and cement and other

masonry products, arsenic and
chromium from chemically-treated

lumber.

Your risk from those 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 dust masks

that are specifically designed to filter
out microscopic particles.

ENG-2 ENG-3

Owner's IV nua! IVbde! No. 875 Owner's IVbnua! IVbde! No. 875 1

Disconnect bhe air tool from air supply
before changing tools or attachments,

sepJicing and during non_peration.

Do not wear loose fit'dng clobhing,

scapJes, or neck ties in work area. Loose
cloming may become caught in moving

parts and resultin serious personal injury.
Do not wearjewelry when operal_ng

any tool. Jewelry may become caught in

moving parts and resultin serious
personal injury.

Do not depress trigger when connecting

me air supply hose.

Never trigger 1_e tool when not applied

to a work objecL
Attachments must be securely

attached. Loose attachments can cause
serious injury.

Protect air lines from damage or

punc_re.

Never point an air tool atoneself or any

omer person. Serious injury could occur.
Check air hoses for weak or worn

condilJons before each use. I_ke sure all
connections are secure.

Release all pressure from bhe system

before attempl_ng to install, service,
relocate or perform any maintenance.

Keep all nuts, bolts and screws l_ght
and ensure equipmentis in safe working

condition.

Use attachments designed for use with

air powered tool Always examine
accessories before moun#ng for chips,

cracks, or signs of damage.

Never use mounted points or omer
accessories mathave been dropped or
exposed to water, solventor extreme
tempera_are changes. Iris a good practice
to operate me tool in a protected
enclosure for one minute after mounting
any accessory.

Always use accessories with an RPM
rating that meets or exceeds the tool
RPMra#ng.

Never carry a tool by the hose or pull

the hose to move the tool or a
compressor. Keep hoses away from

hea_ oil and sharp edges. Replace any
hose that is darn,_ged, weak or worn.

Inhalation hazard: Abrasive tools, such
as grinders, sanders and cut_off tools
generate dust and abrasive materials

which can be harmful to human lungs
and respiratory system. Always wear

IVBHA/NIOSH approved, properly fl_ng

face mask or respirator when using
such tools.

Some materials such as adhesives and
tar, contain chemicals whose vapors

could cause serious injury with

prolonged exposure. Always work in a

clean, dry, well ventilated area.

Tools which contain moving elements,
or drive other moving tools, such as

grinding wheels, sockets, sanding
discs, etc., can become entangled in
hair, clothing, jewelry and other loose
objects, resulting in severe injury.

Never wear loose fitting apparel which
contains loose straps or des, that could
become tangled in moving parts of the

tool. Remove any jewelry, watches, etc.,
which might become caught by the
tool. Keep hands away from moving

parts. Tie up or cover long hair.

Improperly maintained tools and
accessories can cause serious injury.

Maintain the tool with care. A properly
maintained tool, with sharp cutting
edges, reduces the risk of binding and

is easier to control.

There is a risk ofburs#ng if the tool is
damaged. Check for misalignment or
binding of moving parts, breakage of

parts and any other condition that

affects the tool's opera#on. If darn,_ged,
have the tool serviced before using.

Tools which cu_ shear, drill, staple,
punch, chisel, etc. are capable of
causing serious injury. Keep the
working part of the tool away from
hands and body.

After an air tool has been lubricated, oil
will discharge through the exhaust port

during the first few seconds of
opera#on. Thus, the exhaust port must
be covered with a towel before applying

air pressure.

Use Only Impact Sockets & Accessories
Only use sockets designated "FOR USE

IMTH IIVPACT WRENCHES." Hand tool

sockets can break, creating a hazard
from flying pieces. Always check
sockets, retainers and drives regularly
for wear or damage and replace when
necessary.

ENG -4 ENG -5

Owner's Manual IVbde! No. 875 168820 Owner's Manual IVbde! No. 875 1688

be a flexible hose in order to isolate

Air Tool Hook Up

Never carry a tool by _e hose or pull _e
hose to move _e tool or a compressor.

Before _e tool is connected to _e air

supply, clear 1be air hose of accumulated
dustand moisture by running air freely

• rough _e air hose for _lOseconds.
Air Hoses for your Air Tools

Figure 1 Illuslzates a recommended air
hose hook up.

A 3/Sinch ID air hose is required up to a

leng_ of 25feet A 3/Sinch ID hose
Ionger_an 25feetwill cause a pressure

drop and may impede performance. If

more leng_ is required, a 1/zinch ID air
hose is recommended. Be sure all hoses

and fitlJngs are _e correctsize and
correctly secured before using _e tool.

ENG -6 ENG -7

Keep hoses away from heal oil and sharp
edges. Replace any hose _atis damaged,

weak or worn.

Small (home)shop hard piping:

A piping diagram for a typical home shop

is shown. Some helpful tips are:

Always use hoses and pipes rated for

higher pressure _an your system will
encounter.

Never use PVC pipes for
compressed air piping systems as
explosion and serious injury may

result

The connection from _e compressor
to _e inilJal take_ffhard pipe must

movement of _e compressor.

Route _e inilJal take4Dffline (pipe)
as slzaight up _e shop wall and as
high as possible. This will help

minimize water leaving _e
compressor and lzaveling _rough
system

Slope _e main lines down at least

3/4 inch per lOfeet of pipe away
from air compressor; _is will draw

• e condensate wi_ _e flowofair
and away from _e compressor.

Place _e firstdrop as far from _e
compressor as _e size of your shop

will allow (£Ofeetis optimal, al_ough
unrealislJc fora small shop). The

furtlqer _e drop, _e more _at
condensation can occur, and _e
drier _e airwill be when itreaches

• e water separator.

In order to reduce _e amountof
water and contaminants _atget into

• e water separator, install _e take-
offline on _e top of_e main air

supply line for each air drop.

A drain line should be placed at_e
end of_e main line for condensate

drainage.

Drain valves should be placed at_e
end of branch lines and _e drain

line, and drained daily.

This tools power regulator valve may be
adjusted by rotalng _e switch, unlJl

desired oulputis achieved. The center is

neural, to _e leftis reverse and to _e
rightis forward. The fur_eryou go in

each direction _e more torque _atwill

be achieved.

The power can be regulated only in _e
forward direction. The tool will only
operate in full power in _e reverse

direclJon. Once a boltor fastener is
seated, impaclJng for longer 1ban 10

seconds could damage 1beimpacting

mechanism. Ifittakes Ionger_an 10

seconds to remove _e desired fastener,

itis recommended _atyou use of a
larger impactwrench.

Figure 2

Once a bolt or fastener is seated,
impacting for longer than five (5)

seconds will cause excessive wear and
possible damage to the impacting

mechanism. If it takes longer than five
seconds to tighten or loosen your bolt

or fastener, we recommend the use of a
larger size impact wrench.