Craftsman 875198641 Owner’s Manual
Owner's Manual
i PROFESSIONAL i
Pneumatic 1/2-inch Drive
COMPOSITE IMPACT WRENCH
Model No.
875.198641
WARNING:
Before operating tool, read this
manual and follow all
Safety Recommendations and
Operating Instructions.
, Safety
, Warranty
, Features &Operation
, Maintenance
, Espahol
Distributed by Sears, Roebuck and Co., Hoffman Estates, IL 60179
www.Sears.com
ReadOperatingInstructions
Please become familiar with all the instructions and
warnings before operating any pneumatic tool.
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
tool if you experience tingling, numbness, discomfort or
pain in your hands or arms. You should consult your
physician before resuming use of tool.
90 PSI Maximum
This tool is designed to operate at an air 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
tool failure.
NOTE: THEAIR SUPPLY SHOULD BE CLEAN, DRYAND
PREFERABLY LUBRICATED. FOR BEST RESULTS
DRAIN THE MOISTURE FROM YOUR COMPRESSOR
DALLY.
Use Only Impact Sockets & Accessories
Only use sockets designated "FOR USEWITH
IMPACTWRENCHES." 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.
Some dust created by power sanding, sawing, grinding,
drilling and other construction activities contains chemi-
cals 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, and
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 par-
ticles.
FULL ONE WARRANTY ON
CRAFTSMAN AIR-DRIVE TOOLS
If this Craftsman tooI fails to give complete satisfaction
within one year from the date of purchase, RETURN IT TO
THE NEAREST SEARS STORE INTHE UNITED STATES,
and Sears will repair it free of charge. If this Craftsman
tool is used for commercial or rental purposes, this
warranty applies for only 90 days from the date of
purchase. This warranty gives you specific legal rights,
and you may also have other rights which vary from state
to state.
Distributed by Sears, Roebuck and Co., Dept. 817WA,
Hoffman Estates, IL 60179.
The Craftsman Model 875.198641 1/2" Square Drive
Professional Impact Wrench is designed for demanding
fastening and maintenance applications.
Features
The Craftsman 1/2" Drive impact Wrench is equipped
with a power regulator. This tool features full power in
reverse and 3 power levels in forward. The numbers 1
through 3 on the housing are only for reference and do
not denote a specific power output. One (1) designates
the lowest power output in forward, while three (3)
designates the highest power output in forward.
Specifications
Drtve size..................................................................................1/2"
No load speed................................................................8,500RPM
Max torque (Forward)......................................................570 ft/Ibs
Max torque (Reverse) .....................................................700 ft/Ibs
Length..........................................................................................7"
Weight .................................................................................4.5 Ibs.
Air inlet.............................................................................1/4"NPT
Recommended hose size..................................................3/8" I.D.
Average air consumption.................................................5.5CFM
Maximum operating pressure ...............................................90 psi
Pre-Operation
Before the tool is connected to the air supply, clear the air
hose of accumulated dust and moisture by running air
freely through the air hose for 5-10 seconds. Before
removing a tool for service or changing sockets, make
sure the air line is shut-off at the compressor. This will
prevent the tool from operating if the throttle is accidently
engaged.
Installation (See figure 1)
This tool is designed to operate at 90 psi. Lower pres-
sure (below 90 psi) will reduce performance of the tool
while higher air pressure (over 90 psi) raises the perfor-
mance of the tool beyond its rated capacity and could
cause serious damage to tool and user.
Always use clean dry air. Excessive moisture and dirt will
greatly reduce the life of any air motor. We recommend
the installation of an in-line filter-regulator-lubricator as
close to the tool as possible.
A 3/8" air hose is required up to a length of 8 ft. If more
length is required a 1/2" air hose should be used at the
compressor. Attach a 3/8" whip hose for the remaining
4 - 8 ft. for flexibility. Be sure all hoses and fittings are the
correct size and tightly secured before using air tool.
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._ Morsetha_n1/100slo.pe
ranch ne = 2 t Sto_ Filter Main line = 3 times
"If ........ I I _" Reaulator Tool inlet/hose size
I I iool mien/nosesize I I Valve
II II _ _ Stop a
_)A_lve ( Air Compressor
_" Figure I - Air Hose Hook Up -_r .\ .........x x \x\\\\\\\\l"".
The Craftsman 1/2" Professional Impact Wrench is
designed to operate on 90 PSIG. Lower pressure (below
90 PSI) will reduce performance of the tool, while higher
air pressure (over 90 PSI) raises the performance of the
tool beyond its rated capacity and could cause serious
damage to tool and user.
The tool features a built in regulator with reverse having
maximum power and forward having 3positions. The
three forward positions are 1,2 and 3, with 3 being the
maximum torque output and 1 being the least amount
of torque output (figure 2 ).
(Figure 2)
(Figure 3)
[ ,WARNINe]
To operate the tool:
° Connect the tool to the air hose
° Adjust the air compressor regulator to 90 PSI. This
tool operates at 90 PSI. Use of pressure, higher than
90 PSI at the tool, may cause injury to the user or
damage to the tool.
° Depress the elongated throttle lever to operate the
tool. The speed of the tool can be varied by teasing
the trigger.
° To stop tool, release the throttle
Lubrication
An in-line filter-regulator-lubricator (fig 1) is recommended
as it increases tool life 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 placing 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 collects on the paper.
Excessive amounts of oil should be avoided.
In the event that it becomes necessary to store the tool for
an extended period of time (overnight, weekend, etc.), it
should receive a generous amount of lubrication through
the air inlet (fig 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 tool oil or any other
high grade turbine oil containing moisture absorbent, rust
inhibitors, metal wetting agents and an EP (extreme
pressure) additive. (See Fig. 3 for location/air inlet).
To lubricate the air tool manually:
• Disconnect the tool from the air supply
• Depress the throttle trigger and place several
drops of air tool oil into the air inlet.(Figure 3)
• Connect the tool to the air supply and run for 30
seconds. This will allow the oil to be distributed
throughout the tool motor. The excess oil will be
expelled through the tool exhaust.
This procedure is recommended for both before and
after each use of the tool.
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Sears CRAFTSMAN Model 875.198641
Pneumatic 1/2-inch COMPOSITE IMPACT WRENCH
Exploded View and Parts List
j
22 21
19
11 18 6
17
15 14 13 12 11
24 25 26 27 29 30
33 32
27 28
(
/
./
37
20 10 9
34 36 38
Ref. Description Part No. Ref. Description Part No.
1 Motor Housing 8700974
2 Valve Stem 8700862
3 Throttle Spring 8700362
4 Exhaust Deflector 8700864
5 Hose Adaptor 8700975
6 O-Ring 8700866
7 Throttle Trigger 8700882
8 O-Ring 8729936
9 O-Ring (2) 8731200
10 Reversing Regulator 8700883
11 Ball Bearing (2) 8729478
12 Oil Seal 8729477
13 O-Ring 8700868
14 Front Plate 8700884
15 Cylinder 8700885
16 Rotor 8700886
17 Rotor Blade (6) 8700887
18 Rear Plate 8700888
19 Guide Pin 8730032
20 End Cap Gasket 8700889
21 End Cap 8700973
22 Regulator Lever 8700972
23 Torx Screw (4) 8700871
24 Hammer Cage 8700095
25 Cam Ball Pilot 8572035
26 Cam Ball 8572034
27 Hammer Pin (2) 8700315
28 Hammer Cam 8700096
29 Cam Release Spring 8700098
30 Anvil 8700895
31 Anvil Collar 8700896
32 Socket Retaining Ring 81013129
33 O-Ring 81008695
34 Front Gasket 8700894
35 Oil Plug 8729739
36 Clutch Housing 8700989
37 Torx Screw (2) 8700744
38 Oil Seal 8730022
39 Support Rod (4) 8700897
40 Valve Stem Bushing 8700880
41 Washer 8700923
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