Page 1
3/8-in. Impact Wrench
Owner's Manual
Model No. 875.199810
Unpacking
When unpacking this product, carefully
inspect for any damage that may have
occurred during transit. Make sure any
ioose fittings, bolts, etc. are tightened
before putting this product into service.
WARNWG; Please read and save 1 /tese safety and operating instrucaons. Read carefully
before attempting to assemble, fnstalf, 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 andJor property damage! Retain Instructions
lor future reference.
Sears, Roebuck and Co., Hoffman Estates, !L 60179
wwvtf.CRAFTSMAN.com
0807
Page 2
Owner’s Manual
Model No. 875,199810
Table of Contents
Features & Benefits
Specificatiotrs
Product tAferranty
Coroprassoi Requirements
Important Safety instructions
instaBaton and Operation
Maintenance
Exploded View Drawing & Parts List
Troubtestwoting
Features & Benefits
The Craftsman Model 875.199810 3/8*
Square Orhre Impact Wench is ideal for
general assembly, automotive, agricultural
and industrial applications. Features «
Built-In regulator for power output
adjusftjjenf; pin type cluftfo for increased
power output; ring-type socket retainer
allows quirk socket changes.
Specifications
Drive size....................................
impacts per minute
Free speed (No Load)
Ultimate torque
Weight
Overall length
Average air consumption....
Recommended hose size..
Air inlet........................................
Maximum Air Pressure
.......................
....................
.............................
.........................................
...............................
.................
...............
....1,100 IPM
.. 9.000 RPM
.... 145 ft. lbs.
..........2.8 lbs.
...............
....3.5SCFM
........
......
1/4" NPT
...........
3/8“ t.D.
SORSI
ONE YEAR FULL WARRANTY ON
CRAFTSMAN TOOL
if this Craftstnan tool fails to give complete
satisfection ivifhin one year from the dale
of purchase, RETURN IT TO ANY SEARS
STORE OR OTHER CRAFTSMAN
OUTLET IN THE UNITED STATES FOR
FREE REPLACEMENT,
If this Craflsman toot 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, bite or blades. This wananty
gives you specific legal rights, and you
may also have other rights which vary
from state to state.
Seats, Roebuck and Co.,
Hoffitem Estates, IL S01T9
Min. Compressor Requirements
3/8”
6.5"
Heavy Use - 33 Gallon Professional
Warranty
Light Use -12 GaHon
Typical Use -17 Gaflon
ENG-2
Page 3
Own&r’s Manual
Model No. 875.199810
Important Safety Instructions
Read Operating Instructions
Please becotne familiar with all the
insirucUons and warriings before
operating any pneumatic tool.
/Uways 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 tor matWng 287,1 on your eye
protertion to ensure toai it is an approved
style.
Hearing Protection is Recommended
Hearing prolecfion 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 3 given work area, if you are unable to
determine your noise tevet exposure, we
recommend the use of hearing protection.
Avoid Prolonged Exposure to Vibration
Pneumatic tools can vibrate during use.
Prolonged expcsure to vibration or very
repetitive hand and arm movements can
cause injury. Discontinue the use of any
tool if you experience tingling, numbness,
discomfort or pain in your hands or arms.
You should consuK your physician belois
resuming use of tool.
90 PSI Maximum
This tool is designed to operate at an air
pressure of 90 pounds per square iiich
gauge pressure (90 PSI) maximum, at toe
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 tor, causirg
premature tool failure.
Awarning
California Prop 6S
Some dust created by power sanding,
sawing, grinding, driiting and other
construcOon activities contains
chemicals known to cause cancer, birth
defects or other reproductive harm.
Some examples of these cdtemicals are:
Lead from lead based p^nt, crystaliine
silica from bricks and cement and other
masonry products, arsenic and
chromium from chemically-treated
lumber.
Your risk from those exposures varies,
depenthng 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 apedhcaify deigned to filter
out microscopic particles.
EXÍG-3
Page 4
Owner's Manual
Model No. 875.199810
Disconnect the air tool from air supply
before changing tools or attachments,
servicing and during non-operation.
Do not wear loose fitting clothing,
scarves, or neck ties in work area. Loose
clothing may become caught in moving
parts and result in serious personal injury.
Do not wear Jewetry when operating
any tool. Jeweiry may become caught in
movirtg parts and result in serious
personal injury.
Do not depress trigger when connecting
the air supply hose.
Never trigger the tool when not applied
to a work object.
Attachments must be securely
attached. Loose attachments can cause
serious injury.
Protect air lines from damage or
puncture.
Never point an air tool at oneself or any
other person. Serious injury could occur.
Check air hoses for weak or worn
conditions before each use. Make sure all
connections are secure.
Acaution
Release all pressure from the system
before attempting to install, service,
relocate or perform any maintenance.
Keep all nuts, boHs and screws tight
and ensure equipment is in safe working
condition.
Awarnino
Use attachments designed for use with
air powered tool. Always examine
accessories before mounting for chips,
cracks. Or signs of damage.
Never use mounted points or other
accessories that have been drop^ied or
exposed to water, solvent or extreme
temperature changes. It is a good practice
to operate the tool in a protected
enclosure fw one minute alter mounting
any accessory.
AWARNiNG
Always use accessories with an RPM
rating that meets or exceeds the tool
RPM fating.
Awarning
Never carry a tool by the hose or pull
the hose to move the tool or a
compressor. Keep hoses away from
heat, oil and sharp edges. Replace any
hose that is damaged, weak or worn.
Awarnirg
Inhalation hazard: Abrasive tools, such
as grinders, sanders and cut-off foo/s
generate dust and abrasive materials
which can be harmful to human lungs
and respiratory system. Always wear
MSHA/NIOSH approved, properly fitting
face mask or respirator when using
such loots.
ENG-4
Page 5
Owner’s Manual
Model No. 875.199810
Some materials such as adhesives and
tar. Contain ctrertitcais whose vapors
could cause serious injury with
prolonged exposure. Always work in a
clean, dry, well ventilated area.
Awarning
Tools which contain moving elements,
or drive other moving toots, sucfi as
grinding wheels, sockets, sanding
discs, etc., can become entangled in
hair, cloUiing, Jewelry and other loose
objects, resulting in severe injury.
Never wear loose fitting apparel which
contains loose straps or ties, 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.
Awarning
Improperly maintained tools and
accessories can cause serious injury.
Maintain die tool with care. A properly
maintaiaed iooi, with sharp cutting
edges, reduces the risk of binding and
is easier to control
A WARNING
Toots which cut, shear, drill, staple,
punch, cftis«/, etc. are capable of
causing serious injury. Keep the
working part of the tool away from
hands and body.
Awarning
After an air tool has been lubricated, oil
will discharge through the exhaust port
during the first few seconds of
operation. Thus, the exhaust port must
be covered with a towel before applying
air pressure.
Awarning
Only use sockets designated “FOR USE
mm IMPACT WRENCHES.“ Hand tool
sockets can break, creating a hazard
from dying pieces. Always check
sockets, retainers and drives regulariy
for wear or damage and replace when
necessary.
There is a risk of bursting 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 operation, if damaged,
have the tool serviced before using.
ENG-5
Page 6
Owner’s Manual
Model No. 875.199810
through the air hose for 5-10 seconds.
Air Hoses for your Air Tools
Figure 1 illustrates a recommended air
hose hook up.
A 3/8 inch ID air hose is required up to a
length of 25 feet. A 3/8 inch ID hose
longer than 25 feet wiH cause a pressure
drop and may impede performance. If
more length is required, a 'A inch ID air
hose is recommended. Be sure all hoses
and fittings are the correct size and
correctly secured before using the tool.
ENG-6
Small (horns) shop hard piping:
A piping diagram for a typical home shop
is shown. Some helpful Ups are;
• Always use hoses and pipes rated for
higher pressure than your system will
encounter.
• Never use PVC pipes for
compressed air piping systems as
explosion and serious injury may
result.
• The connection from the compressor
to the initial take-off hard pipe must
Page 7
Owner’s Manual
Model No. 875.199810
be a flexible hose in order to isolate
movement of the compressor.
Route the initial take-off line (pipe) as
straight up the shop wall and as high
as possible. This will help minimize
water leaving the compressor and
traveling through system
Slope the main lines down at least
3/4 inch per to feet of pipe away
from air compressor; this wiB draw
the condensate with the flow of air
and away from the compressor.
Place the first drop as far from the
compressor as the size of your shop
will allow (50 feel is optimal, although
unrealistic for a small shop). The
further the drop, the more that
condensation can occur, and the
drier the air will be when it reaches
the water separator.
In order to reduce the amount of
water and contaminants that get into
the water separator, install the take
off line on the top of the main air
supply line for each air drop,
A Drain line should be placed at the
end of the main line for condensate
drainage.
Drain valves should be placed al the
end of branch lines and the drain
line, and drained daily.
Operation
This tools features a power regulator valve
(fig. 2). Rotate regulator until desired output
is achieved. The settings on the reguiator
are only for reference and do not denote a
specific power output. Turn regulator to
position with smaller circle being the least
amount of power and larger cirele being for
the most amount of power. The tool only
operates at maximum power in reverse.
Figure 2
Reguiator Valve
AWMWIWg
Ones s bolt or Issienor 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.
ENG-7
Page 8
Owner’s Manual Model No. 875.199810
Maintenance
Lubrication
An in-line filter-regulator-lubricator (fig 1)
is recommended as it increases tool Bfe
and keeps the tool in sustained operation.
The in-line lubricator should be regularly
checked and filled with air tool oil. Proper
adjustment of the in-line lubricator is
performed by pladng a sheet of paper
next to the tools exhaust ports and holding
the throttle open approximately 30
seconds. The lubricator "is properly set
when a light stain of oil coSecfs on the
paper.
Excessive amounts of off should be
avoided. In the event that it becomes
necessaty to store the tool for an
extended period of time {overnight,
v№ekend, etc.), it should receive a
generous amount of lubrication through
the air inlet (Figure 3). The tool should be
run for approximately 30 seconds to
ensure oil has been evenly distributed
throughout the tool. The tool should be
stored in a clean and dry environment.
Recommended Lubricants
Use air looi oil or any other high grade
turbine oil containing moisture absorbent,
rust inhOtitors, metal wetling agents and
an EP (extreme pressure) additive. See
Figure 3 for localion/air inief.
1.Disconnect the impact wrench from
the air supply.
2. Remove the slotted screw or Allen
head screw from the oil port hole
(Ref. No. 51) (Referto figure 3).
3. Squeeze approximately 1 oz. of 30 weight oil
through the oil port hole. Replace the screw.
4. Reconnect the ar supply to the Impact
wrench and run for 20 to 30 seconds.
Lubricate the entire impact mechanism
by rotating the tool upside down
and sideways while running the toot.
5. Remove the screw and hold the oil
port hole over a suitable container to
allow excess oil to drain. Sometimes
triggering the tool when dumping the oils
helps to force out the excess oil.
6. If the oil is dirty, repeat the procedureabove
until the oil comes out dear. Install the screw
and tighten. The residual oil remaining in the
impact mechanism chamber is all that is
needed for proper lubrication.
IMPACT MECHANISM LUBRICATION
The in^iact mechanism transfers power
from the tool to a nul or bolt. Oil in the
merltanism is forced out and must be
replaced. Lubricate the impact
mechanism one time a yean more
often If a tool Is used more than ten
hours a week.
To lubricate and clean the impact
mechanism and the front bearing:
ENG-e
Page 9
Owner’s Manual
Model No. 875.199810
Exploded \fiew Drawing
Parts List
#
F«rt « Ovscripllon Qty Re»
1 0106207
2 0106206
a
4 9106210
6
7 9160070
8
9 9106215
10
11“* 9106217 Drive Bel) Sea!
12 91Q8216 Sisel Ball 1 38
IS
14
IS
16 9106222
17
18
19
20 9106226 Dowel Pin
21
22
?3
24
25
26 9106232
Housing
0(1 SeaJ
9106200 AnMi 3u«hiflfl 29
Aetiiner RJng 30
Washer
9106211
Socket Relainer 1
9106212
O-Ring
9106214 Aftwi
Spring 1
9106216
Cam 1
0160218 Hammer Pin 2
9106220 Hammer Cap* 1
Ball Searing
»196221
Oil Beat 1
91062ZS
O-Rlno
9106224 Fr»M End plate
9106225 Cylinder
9106227
Rotor
9106228 Rotor Blade
Rear End Plate
»106229
Bali Bearing 1
91D6230
91D62S1
Ornamental Gasket 1
Gasket 1
'?■ .. « s T\
t 33
1
1
1
1
1
1 46
1
6 48 01D6254
1
Part «
27
26 9106234
31
32
34
35
36
37
39
40
41
42
43 ^9106246 Throttle Valve
44 9106247 Valve 8 prfng
45
47
43
966349
SQ
921007 Spring
Si 9100363
Description
9106233 End Cap
Cap Screw
91062ÌS
Revet»« Busning
9106236
Reverse Valve
976024 0-R Inq
9106237 l.ocklng Pin
9106236
Spring
0106239 Reverse Switch
0106240 Screw
9106241
Trigger
01Ù6242 Triflger Pin
9106243
Spring Pfn
9106255 Trigger Sleeve
066009
Oil Plug
9106244 Valw Seat
9106245
Valve Stem
9106248
Exhaust Deflector
Air Intet Bushing
9106252
9106253
Handle Grip
Plus 4
M uffler Cover
O-Ring
Qly.
4
1
1
^ 1
1
1
1
1
1
1
1
1
1
ENG-9
Page 10
Owner’s Manual
Model No. 875.199810
Troubleshooting
Tool runs
slow or win
not operate.
Moisture
blowing out
of tool
1, Grit or gum in tool
2. No oil in tool
3, Low air pressure
4. Air hose leaks
5. Pressure drops
I.V'feterintank
1. Flush the tool with air tool oil, gum
solvenl, or an equal mixture of SAE 10
motor oil and kerosene. Lubricate the tool
after cleaning.
2. Lubricate the tool according to the
lubrication instructions in this manual.
3a. Adjust the regulator on the loot to the
maximum setting (If applicable).
3b. Adjust the compressor regulator to tool
maximum while the too! is .nmning free
4. Tighten and seal hose fittings if leaks are
found.
5a. Be sure the hose is the proper size.
Long hoses or tools using
large volumes of air may require a hose with
an I.D. of 1/2” or larger depending on the
total length of the hose.
5b. Do not use multiple number of hoses
connected together with quick connect
fittings. This causes additional pressure
drops and reduces the tool power. Directly
connect the hoses together.
1. Drain tank. (See air compressor manual).
Oil tool and run until no water Is ewdent. Oil
tool again and run 1-2 seconds.
ENG-10
2. water in the air lines/
hoses
2a. Insiall a water separator/filter.
NOTE: Separators only work properly when
the air passing through the separator is
cool. Locate the separalor/filter as far as
possible from the compressor.
2b. Install an air dryer.
2c, Anytime water enters the tool, the tool
should be oiled immediately.
Page 11
Owner's Manual
Model No. 875.199810
Troubleshooting
Impacts slowly lubrication
or will not Impact
2. Tool regulator set in 2. Adjust the regulator on the tool to
wrong position the maximum setting
3. In-line regulator or
compressor regulator
set too low
Impacts rapidly but 1. Worn impact
will not remove bolts mechanism
Does not impact
1. Broken impact
mechanism
Notes;
1. Lubricate the air motor and the
impact mechanism. (See Lubrication
3. Adjust regulators in the air system
1. Replace worn impact mechanism
components
1, Replace broken impact mechanism
components
ENG-11
Page 12
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For the replacement parts, accessories and
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For expert home solutions adwce.
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For repair of carry-in items like vacuums, lawn equipment,
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Cal) anytime, day or night
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1
To purchase a protection agreement on a product serviced by Sears:
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