Craftsman 875199820 Owner’s Manual
Owner's Manual
Pneumatic 1/2" Drive
IMPACT WRENCH
Model No.
875.199820
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. Ifyou 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
DAILY.
Use Only Impact Sockets & Accessories
Only use sockets designated "FOR USE WITH IMPACT
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.
[, WARNINGJ
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 ON E YEAR WARRANTY ON
CRAFTSMAN AIR-DRIVE TOOLS
If this Craftsman tool fails to give complete satisfaction
within one year from the date of purchase, RETURN IT
TO THE NEAREST SEARS STORE IN THE UNITED
STATES, and Sears will repair or replace 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 875.199820 1/2" Square Drive
Impact Wrench is ideal for general assembly,
automotive, agricultural and industrial applications.
Features
• Built-in regulator for power output adjustment.
• Single Hammer clutch for increased power output.
• Ring-type socket retainer allows quick socket
changes.
Specifications
Drive size............................................................................... 1/2"
Impacts per minute ..................................................... 550 IPM
Free speed (No Load)........................................... 7,500 RPM
Ultimate torque....................................................... 340 ft. Ibs.
Weight ............................................................................. 5.2 Ibs.
Overall length..................................................................... 7-1/2"
Average air consumption .......................................... 6.5 SCFM
Recommended hose size ........................................... 3/8" I.D.
Air inlet.......................................................................... 1/4" NPT
Maximum Air 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.
Morsetha_n1/100slo.pe
ranch ne = 2 t Sto_ Filter Main line = 3 times
"If ........ I I v Reoulator Tool inlet/hose size
I I iool mien/nosesize I I Valve
I I Auto Drain _ AirTool I I
_)A:lve ( Air Compressor
"_ Figure I _-r •"
Air Hose Hook Up \\\\\\\\\\\\_x\\
This tools power regulator valve, this tool may be
adjusted by rotating the switch (Ref. No. 27), until desired
output is achieved. The numbers 1 through 3 on the
regulator are only for reference and do not denote a
specific power output. Turn counterclockwise to one for
less power and clockwise to three for maximum power.
Power is regulated in both forward and reverse direction.
Once a bolt or fastener is seated, impacting for longer
than five seconds will cause excessive wear and
damage to the impacting mechanism. If it takes longer
than five seconds to tighten your bolt or fastener, we
recommend the use of a larger size impact wrench.
Lubrication
An in-line filter-regulator-lubricator (fig 1) is recommended
as it increases tool life and keeps the tooI 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. The tool should be run for approximately 30
seconds to ensure oil has been evenly distributed through
out 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.
Impact clutch lubrication: The tooI reservoir in the anvil
housing is greased. No maintenance is required.
WARNING
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.
Sears CRAFTSMAN Model 875.199820
Pneumatic 1/2" Drive impact Wrench
Exploded View and Parts List
Z1
Ref.
1
2
3
4
5
6
7
8
9
lO
11
12
13
14
15
16
17
18
19
20
21
22
23
Pa_ No.
@
9287157
9287158
9287159
9287160
9287161
9287162
9287163
9287164
9287165
9287166
9287167
9287168
9287169
9287170
9287171
9287172
9287173
9287174
9287175
9287176
9287177
_0
Description
Housing
Anvil Bushing
Socket Retainer
O-Ring
Anvil
Hammer Cage
Hammer Pin
Hammer Dog
Cam
BalmBearing
Oil Seal
Front End Plate
Dowel Pin
Rotor
Rotor Blade
Cylinder
Dowel Pin
Rear End Plate
Gasket
End Cap
Cap Screw
Reverse Bushing
Reverse Valve
Q'ty
1
1
1
1
1
1
1
1
1
2
1
1
1
1
6
1
1
1
1
1
4
1
1
Ref.
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
Part No,
9287178
9287179
9287180
9287181
9287182
9287183
9287184
9287185
9287186
9287187
9287190
9287191
9287192
9287193
9287194
9287198
9287199
9287200
Description
O-Ring
Set Pin
Spring
Reverse Switch
Set Pin
Valve Seat
Valve Stem
Throttle Valve
Valve Spring
Exhaust Deflector
Air Inlet Bushing
Trigger Sleeve
Spring
Trigger
Spring Pin
Plug
Oil Plug
Protective Nose
Cover
Handle Grip
O-Ring
Plastic Pipe
O=Ring
Q'ty
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
4
I
I
1
t
1
1
(4)
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