Craftsman 235.185930 User manual

Owner’s Manual
3/4¨ Drive Ultra–Duty
PISTOL GRIP IMPACT WRENCH
Model No.
235.185930
WARNING:
Before using this Impact Wrench
read this manual and follow all its
Safety and Operating Instructions.
Sears, Roebuck and Co., Hoffman Estates, IL 60179
Owner’s Manual P7463 (09–00) Printed in USA
SSafety
SOperation
SMaintenance
SService and
Adjustments
SParts List
SEspañol

2
TABLE OF CONTENTS PAGE
Two Year Warranty 2
Safety 3–5
Warning Labels
Notice, Warning and Caution
Placing Tool In Service
Using the Tool
Operation 6–7
Air Supply and Connections
Using the Power Management System
Specifications
Maintenance 7
Lubrication
Service and Adjustment 8–15
Disassembly
Assembly
Troubleshooting 16
Parts List 17–19
Exploded Drawing
Parts for Ordering
Español 20–37
FULL TWO YEAR WARRANTY
If this product fails due to a defect in material or workmanship within
two years from the date of purchase, Sears will at its option, repair or
replace it free of charge.
Return this product to a Sears Service Center for repair, or to place of
purchase for replacement.
This warranty gives you specific legal rights, and you may also have
other rights which vary from state to state.
Sears, Roebuck and Co., Dept. 817WA, Hoffman Estates, IL 60179

3
Always wear eye
protection when op-
erating or perform-
ing maintenance on
this tool.
Always wear hear-
ing protection
when operating
this tool.
Always turn off the air supply
and disconnect the air supply
hose before installing, re-
moving or adjusting any ac-
cessory on this tool, or before
performing any maintenance
on this tool.
Air powered tools can vibrate
in use. Vibration, repetitive
motions or uncomfortable
positions may be harmful to
your hands and arms. Stop
using any tool if discomfort,
tingling feeling or pain occurs.
Seek medical advice before
resuming use.
Do not carry the
tool by the hose.
Do not use dam-
aged, frayed or
deteriorated air
hoses and fittings.
Keep body stance
balanced and firm.
Do not overreach
when operating this
tool.
Operate at 90 psig
(6.2 bar/620 kPa)
Maximum air
pressure.
90 psig
(6.2bar/620kPa)
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING

4
WARNING is used to indicate the presence of a hazard which
can cause severe personal injury or death if the warning is ignored.
CAUTION is used to indicate the presence of a hazard which will
or can cause minor personal injury or property damage if the cau-
tion is ignored.
NOTICE is used to notify people of installation, operation or main-
tenance information which is important but not hazard related.
This Craftsman Impact Wrench is
designed for use in general auto-
motive repair, tire service and
heavy duty fleet applications.
WARNING:
Important safety information en-
closed.
Read this manual before operating
tool.
It is the responsibility of an em-
ployer to place the information in
this manual into the hands of any-
one who operates this device.
Failure to observe the following
warnings could result in injury.
PLACING TOOL IN SERVICE
•Always operate, inspect and
maintain this tool in accordance
with all regulations (local, state,
federal and country), that may
apply to hand–held/hand–oper-
ated pneumatic tools.
•For safety, top performance,
and maximum durability of
parts, operate this tool at
90 psig (6.2 bar/620 kPa) maxi-
mum air pressure at the inlet
with 1/2” (13 mm) inside diame-
ter air supply hose.
•Always turn off the air supply
and disconnect the air supply
hose before installing, removing
or adjusting any accessory on
this tool, or before performing
any maintenance on this tool.
•Do not use damaged, frayed or
deteriorated air hoses and fit-
tings.
•Be sure all hoses and fittings
are the correct size and are
tightly secured. See Figure 1 for
a typical piping arrangement.
•Always use clean, dry air at
90 psig maximum air pressure.
Dust, corrosive fumes and/or
excessive moisture can ruin the
motor of an air tool.
•Do not lubricate tools with flam-
mable or volatile liquids such as
kerosene, diesel or jet fuel.

5
PLACING TOOL IN SERVICE
(continued)
•Do not remove any labels. Re-
place any damaged label.
•The use of a hose whip is rec-
ommended. A coupler con-
nected directly to the air inlet in-
creases tool bulk and de-
creases tool maneuverability.
•For maximum performance, the
coupler on the wall should be
the next size larger than the
coupler used on the tool. The
coupler closest to the tool
should not be less than the
proper air supply hose size.
USING THE TOOL
•Always wear eye protection
when operating or performing
maintenance on this tool.
•Always wear hearing protection
when operating this tool.
•Keep hands, loose clothing and
long hair away from rotating
end of tool.
•Note the position of the revers-
ing button or mechanism before
operating the tool to be aware
of the direction of rotation when
operating the throttle.
•Anticipate and be alert for sud-
den changes in motion during
start–up and operation of any
power tool.
•Keep body stance balanced
and firm. Do not overreach
when operating this tool. High
reaction torques can occur at or
below the recommended air
pressure.
•Tool shaft may continue to ro-
tate briefly after throttle is re-
leased.
•Air powered tools can vibrate in
use. Vibration, repetitive mo-
tions or uncomfortable positions
may be harmful to your hands
and arms. Stop using any tool if
discomfort, tingling feeling or
pain occurs. Seek medical ad-
vice before resuming use.
•Use accessories recommended
by Craftsman.
•Use only impact sockets and
accessories. Do not use hand
(chrome) sockets or accesso-
ries.
•Impact wrenches are not torque
wrenches. Connections requir-
ing specific torque must be
checked with a torque meter af-
ter fitting with an impact
wrench.
•This tool is not designed for
working in explosive atmo-
spheres.
•This tool is not insulated against
electric shock.
NOTICE: The use of other than
genuine Craftsman replacement
parts may result in safety hazards,
decreased tool performance, in-
creased maintenance, and may
invalidate all warranties.
Repairs should be made only by
authorized trained personnel.

6
Air Supply and Connections
Always use clean dry air. Dust,
corrosive fumes and/or excessive
moisture can ruin the motor of an
air tool. An air line filter can greatly
increase the life of an air tool. The
filter removes dust and moisture.
Be sure all hoses and fittings are
the correct size and are tightly se-
cured. See Figure 1 for a typical
piping arrangement.
Figure 1
Main lines 3 times air tool inlet size.
To air system
To air tool
Lubricator Filter
Regulator
Branch line 2 times air
tool inlet size
Drain regularly Compressor
USING THE POWER MANAGEMENT SYSTEM
WARNING:
Air wrenches are not torque con-
trol devices. Fasteners with specif-
ic torque requirements must be
checked with suitable torque mea-
suring devices after installation
with an air wrench.
MODEL 185930 POWER MANAGEMENT SYSTEM
Power setting indicators
Minimum Maximum
Power management dial
Figure 2

7
Your Impact Wrench incorporates
a Power Management System that
allows you to select four power
output settings. These settings
range from minimum power output
through maximum power output in
the forward direction only. The Air
Wrench will always operate at
maximum power output in the re-
verse direction, no matter what
power output level is selected.
NOTICE: The four power setting
indicators of increasing size on the
rear of the housing are for refer-
ence only and DO NOT denote a
specific power output. The small-
est power setting indicator desig-
nates minimum power output, the
two middle power setting indica-
tors denote medium power outputs
and the largest power setting indi-
cator denotes maximum power
output.
The power output can be further
reduced in forward or reverse by
using the variable throttle. Air sup-
ply systems which do not deliver
adequate air pressure can affect
power output at all settings.
SPECIFICATIONS
Model Type of
Handle Drive Impacts per min. Free Speed
rpm
Weight
185930 pistol grip 3/4¨1,175 8,000 7 lbs.
Recommended Torque Range
Forward
lb–ft Forward Newton
meter (Nm)
Reverse
lb–ft Reverse Newton
meter (Nm)
200–900
(1100 max.) 271–1220 (1492 max.) 200–900 (1200 max.) 271–1220 (1627 max.)
LUBRICATION
Use Craftsman No. 18830
Pneumatic Tool Care Kit or a good
quality SAE 20 or 20W motor oil.
Craftsman 18830 Oil
Craftsman 18830 Grease
for routine external lubrica-
tion of the impact mecha-
nism through the Hammer
Case Grease Fitting.
Always use an air line lubricator
with these tools.
CAUTION: Do not mark any
nonmetallic surface on this tool
with customer identification codes.
Such actions could affect tool per-
formance.

8
DISASSEMBLY
NOTICE: Numbers in paren-
theses in the following instruc-
tons are part illustration num-
bers found on pages 17-19.
General Instructions
1. Do not disassemble the tool any
further than necessary to re-
place or repair damaged parts.
2. Whenever grasping a tool or
part in a vise, always use lea-
ther-covered vise jaws to pro-
tect the surface of the part and
help prevent distortion. This is
particularly true of threaded
members and housings.
NOTICE: Always use lea-
ther-covered vise jaws when
clamping the handle in a vise.
Leather will conform to the
shape of the handle and allow
the tool to be held securely. To
prevent damage to the exhaust
diffuser, never clamp only the
bottom of the handle.
3. Do not remove any part which
is a press fit in or on a subas-
sembly unless the removal of
that part is necessary for re-
pairs or replacement.
4. Do not disassemble the tool
unless you have a complete set
of new gaskets and O-rings for
replacement.
Disassembly of the Impact
Wrench
1. Clamp the handle of the impact
wrench in a vise with leather-
covered jaws with the square
driver positioned horizontally.
NOTICE: Avoid excessive
clamping pressure which can
damage the Housing and can
cause difficulty when removing
the parts.
2. Unscrew and remove the four
Hammer Case Screws (12).
3. While lightly tapping on the end
of the Anvil (9) with a plastic
hammer, lift off the Hammer
Case (16) and Hammer Case
Gasket (19).
NOTICE: The Front End Plate
(2) might come off during the
removal of the Hammer Case.
Make sure that it does not drop
on the floor or strike a hard or
metallic surface since it might
be damaged.
4. Grasp the Hammer Frame (13)
and carefully lift off the entire
impact mechanism, making cer-
tain not to drop the two Ham-
mer Pins (14).
Disassembly of the Impact
Mechanism
1. Set the mechanism, driver end
up, on the workbench.
NOTICE: Note the twin ham-
mers within the Hammer
Frame. These are identical, but
must be placed in the Hammer
Frame in a certain relationship.
Using a felt-tipped pen, mark
the top hammer “T↑”and the
bottom hammer “B↑”with the
arrows pointing upward. Mark
both Hammers on the same
end.

9
2. With the mechanism sitting up-
right on the workbench, slowly
rotate the Anvil in a clockwise
direction until it comes up solid.
NOTICE: If you continue to ro-
tate the Anvil, it will cam the
Hammers out of engagement.
Don’t do this; merely rotate the
Anvil until it comes up solid.
3. Hold the Hammer Frame firmly
and without disturbing the ham-
mers, gently lift the Anvil while
simultaneously rotating it clock-
wise about 1/8 of a turn from
the Hammer Frame.
4. With the Anvil removed, lift out
the two Hammer Pins.
NOTICE: The twin hammers
are now free to slide from the
Hammer Frame. Be careful do
not to drop them.
Disassembly of the Motor
NOTICE: When pulling, disas-
sembling or assembling the mo-
tor, we recommend replace-
ment of the Motor Gasket (8).
1. Remove the Motor Assembly
from the Housing (20) by push-
ing on Power Management Dial
(41) from the back of the
Housing. See Figure 3.
Power
Manage-
ment
Dial
Figure 3
NOTICE: If the Motor Assem-
bly cannot be removed from the
Housing by pushing, tap the
Power Management Dial lightly
until the Motor Assembly is free.
2. Remove the Power Manage-
ment Dial from the rear of the
Cylinder (1). Remove the Power
Management Dial Seal (42) if it
needs to be replaced.
3. Remove the Front End Plate (2)
from the Cylinder by tapping the
splined end of the Rotor (6) with
a plastic hammer. If the Front
End Plate does not come loose,
secure a center punch in a vise
with the point angled downward
and outward from the vise.
Then, grasp the Cylinder and
Front End Plate in one hand
and position the hole in the end
of the Rotor against the punch.
NOTICE: Be careful not to
drop the Cylinder since it can
be damaged by hitting a hard
surface.
Using the other hand, tap the
punch with a hammer while
pressing the Rotor against the
punch. After a few taps, the
Front End Plate will slide off of
the Cylinder.
NOTICE: To prevent damage
to the Cylinder, do not tap or
strike Cylinder on a hard or me-
tallic surface when removing
the Rotor Bearings (3) and (4).
4. To remove the Front Rotor
Bearing, hold the Front End
Plate with Front Rotor Bearing
down and tap the Front End
Plate on a flat, nonmetallic
surface such as a work bench.
This will loosen the Front Rotor
Bearing so that it will drop out of
the Front End Plate. See
Figure 4.
Figure 4
Front End Plate
Front Rotor Bearing
Bench with nonmetallic surface
5. Remove the Rear Rotor Bear-
ing Retainer (7) from the rear of
the Rotor (6). The Rotor can

10
now be removed from the Cylin-
der. Remove the Vanes (5) from
the Rotor if they need to be re-
placed.
Figure 5
Cylinder
Rear Rotor Bearing
Bench with nonmetallic surface
6. To remove the Rear Rotor Bear-
ing, hold the Cylinder with the
Rear Rotor Bearing down and
tap the Cylinder on a flat, non-
metallic surface such as a work
bench. This will loosen the Rear
Rotor Bearing so that it will drop
out of the Cylinder. See Figure
5.
7. Working from the rear of the
Housing, push out the Motor
Gasket (8).
NOTICE: When removing the
Motor Gasket, do not use a
screwdriver or any other sharp
object which could damage the
Gasket and/or Housing.
Disassembly of the Throttle
Mechanism
NOTICE: For ease of disas-
sembly, we recommend using
the Inlet Clip Removal Tool (43).
See Figure 6.
Figure 6
Trigger Left-hand
button
Inlet Bushing
Assembly
Inlet Clip Removal
Tool
1. Secure the Inlet Bushing in a
vise. Press in both tabs of the
Inlet Retainer Clip (25) and pull
upward on the Housing (20).
This will allow the Inlet Bushing
to come free from the Handle of
the Housing. See Figure 7.
2. Pull the Trigger (33) from the
front of the Housing and re-
move the Trigger O-ring (34).
Slot for Tab
(both sides)
Tab on Inlet Retainer
Clip (both sides)
Figure 7
3. With the Inlet Bushing still in the
vise, remove the Tilt Valve Seat
Retainer (32) and Tilt Valve
Seat Support (31). Use a
hooked tool with no sharp
edges to remove the Tilt Valve
Seat (30) from the Inlet Bush-
ing. See Figure 8.
Tilt Valve stem Hooked tool
Figure 8
4. Remove the Tilt Valve (29) and
Tilt Valve Spring (28) if dam-
aged.
5. Remove the Inlet Bushing Seal
(27) and Inlet Retainer Clip (25)
if damaged.
NOTICE: Do not remove the
Inlet Bushing Screen (24) from
the Inlet Bushing unless it is
damaged. Clean the Inlet Bush-
ing Screen by using a suitable
cleaning solution in a well venti-
lated area.

11
Disassembly of the Reverse
Valve Mechanism
NOTICE: The Reverse Valve
Assembly cannot be removed
without first removing the For-
ward and Reverse Buttons (39)
and (40). Therefore, it is impor-
tant that the procedure below
be followed exactly.
1. Insert the screwdriver between
the partition and the fully ex-
tended Button. Gently pry
against the Button to disengage
the detent so that the Button
can be removed. After the But-
ton is removed, reach inside the
Housing and rotate the Reverse
Valve to extend the remaining
Button. Repeat the above pro-
cedure for the remaining But-
ton. See Figure 9.Removal of
forward/reverse
buttons
Figure 9
2. Insert thumb into the front of the
Housing and push down on the
Reverse Valve so that it can be
removed through the bottom of
the handle. See Figure 10.
Figure 10
Reverse
Valve
NOTICE: Do not try to remove
the Reverse Valve by pushing
upward. It can only be removed
by pushing it downward and out
of the bottom of the handle. If
the Reverse Valve does not
come free, tap the bottom of the
handle lightly with a rubber
hammer until it drops out.
3. Remove the Top Reverse Valve
O-ring (36) and the Bottom Re-
verse Valve O-ring (37) from the
Reverse Valve.
ASSEMBLY
General Instructions
1. Whenever grasping a tool or
part in a vise, always use leath-
er-covered vise jaws to protect
the surface of the part and help
prevent distortion. This is partic-
ularly true of threaded members
and housings.
NOTICE: Always use leather-
covered vise jaws when clamp-
ing the handle in a vise. Leather
will conform to the shape of the
handle and allow the tool to be
held securely. To prevent dam-
age to the exhaust diffuser, nev-
er clamp only the bottom of the
handle.
2. Always clean every part and
wipe every part with a thin film
of oil before installation.
NOTICE: Do not remove
grease from the impact mecha-
nism or Hammer Case (16). If
the impact mechanism has not
been disassembled, inject
Craftsman No. 18830 Grease
through the Hammer Case
Grease Fitting (18). When dis-
assembling and assembling the
impact mechanism, remove all
grease from the impact mecha-
nism and Hammer Case and lu-
bricate the impact mechanism
and Hammer Case Bushing
(17) with Craftsman No. 18830
Grease.
3. Apply a film of o-ring lubricant to
all O-rings before final assem-
bly.

12
Assembly of the Reverse Valve
Mechanism
1. Install the Bottom Reverse
Valve O-ring (37) (color-coded
blue) and the Top Reverse
Valve O–ring (36) on the Re-
verse Valve (35).
2. Insert the Reverse Valve in the
bottom of the handle making
sure that two ears on the Re-
verse Valve are facing down-
ward. See Figure 11.
Figure 11
Ears
Use a wooden dowel to push
the Reverse Valve up through
the handle until the top of the
Reverse Valve is flush with or
slightly above the bottom of the
motor bore in the Housing (20).
See Figure 12.
Figure 12
Dowel
NOTICE: If the Reverse Valve
is pushed up too far and be-
comes wedged, it will have to
be pushed back down through
the the handle and reinserted
from the bottom of the handle.
The Reverse Valve cannot be
removed by pushing it up
through the handle and into the
motor bore. If the Reverse
Valve must be removed and re-
installed, make sure that the
Top and Bottom Reverse Valve
O-rings have not been rolled off
and are in their proper positions
on the Reverse Valve.
3. When the Reverse Valve has
been installed, rotate it so that
the tab is at the rear of the
Housing. See Figure 13.
Figure 13
Reverse Valve
Front of
Housing
Approx. 1/32”
Rear of Housing
NOTICE: If the orientation of
the Reverse Valve is not correct
(tab facing the the rear of the
Housing), the Trigger (33) and
the Forward and Reverse But-
tons (39) and (40) cannot be
installed.
4. Install the Trigger O-ring (34) on
the Trigger. Insert the Trigger
Assembly in the front of the
Housing.
5. Rotate the Reverse Valve in ei-
ther direction until an ear comes
up against the Trigger.
6. Look through the Housing from
the rear. If the tab on the Re-
verse Valve has been rotated to
the left, install the right Button
in the Housing. When one But-
ton has been installed, push the
Button in. This will rotate the’
Reverse Valve so that the other
Button can be installed. See
Figure 14.

13
Figure 14
Reverse
Valve
Tab
Rear of
Housing
Forward
Button
If the tab on the reverse Valve
has been rotated to the right,
install the left Button. See Fig-
ure 15.
Figure 15
Reverse
Button
Reverse
Valve
Tab
Rear of
Housing
NOTICE: If the Forward/Re-
verse Buttons will not install
easily, move the Reverse Valve
slightly higher in the handle to
provide better alignment with
the Buttons.
7. After the Forward/Reverse But-
tons have been installed, re-
move the Trigger before pro-
ceeding with installation of the
throttle mechanism.
Assembly of Throttle Mecha-
nism
1. Using an Inlet Bushing Screen
Installation Tool, install the Inlet
Bushing Screen (24), screened
end first, in the bottom (hex
end) of the Inlet Bushing (23).
Insert the rounded end of the
tool in the cone formed by the
screen and tap the end of the
tool to secure the rim of the
screen in the Bushing.
2. Install the Inlet Retainer Clip
(25), Inlet Bushing Seal (27),
Tilt Valve Spring (28), Tilt Valve
(29), Tilt Valve Seat (30) and Tilt
Valve Seat Support (31).
WARNING:
The Tilt Valve Seat Retainer
(32) must be properly installed
in the groove in the Inlet Bush-
ing (23). Failure to do so could
result in injury. To check for cor-
rect installation of the Retainer,
insert a pin into one of the holes
in the Retainer and rotate the
Retainer. A correctly installed
Retainer will rotate freely but
with some resistance in the
groove of the Inlet Bushing. An
incorrectly installed Retainer will
pop out of the Inlet Bushing
when the Retainer is rotated.
WARNING:
Do not use compressed air to
check installation of the Tilt
Valve Seat Retainer or Inlet
Bushing Screen unless the en-
tire Inlet Bushing Assembly is
installed in the tool with the
Hammer Case installed and
properly secured to the Motor
Housing. Failure to do so could
result in injury.
3. Install the Tilt Valve Seat Re-
tainer.
NOTICE: When re-installing
the Inlet Bushing Assembly, pull
the Trigger (33) outward and
make sure that the Reverse
Button (40) is depressed before
snapping the Inlet Bushing As-
sembly back into the Housing.
4. Install the Inlet Bushing Assem-
bly by pushing it into the hole in
the Housing until you see and
hear the tabs on Inlet Retainer
Clip snap into place through the
slots in Housing handle.
NOTICE: The Reverse Button
(left) (40) must be pushed in be-
fore the Trigger can be
installed. Otherwise, the Trigger
will be damaged during installa-
tion.
5. Install the Trigger by pushing it
into the handle until a click is
heard indicating that it is prop-
erly engaged.

14
Assembly of the Motor
NOTICE: When disassem-
bling, assembling or pulling the
Motor, we recommend replace-
ment of the Motor Gasket (8).
1. Install the Motor Gasket in the
Housing making sure that the
grooves in the tab of the Motor
Gasket fit around ridge in the
Housing. See Figure 16.
Figure 16
Motor
Gasket
2. Install the Rotor Bearing (4) into
the rear of the Cylinder (1).
3. Install the Rotor in the Cylinder
and secure with the Rear Rotor
Bearing Retainer (7).
4. Install Vanes (5) in the slots in
the Rotor (6).
5. Install the Rotor Bearing (3) into
the Front End Plate (2). Install
the Front End Plate on the Cyl-
inder by pressing on the inner
race of the front Rotor Bearing
until the Bearing is seated on
the Rotor Shaft.
6. Install the Power Management
Dial Seal (42) on the Power
Management Dial (41) and
install the Dial in the end of the
Cylinder.
7. Insert the Motor Assembly into
the Housing (20), Power Man-
agement Dial end first.
Assembly of the Impact
Mechanism
1. Coat the Hammers (15) with a
light film of Craftsman No.
18830 Grease.
2. Heavily coat the jaws of the
Anvil (9) with Craftsman No.
18830 Grease.
Figure 17
Top Hammer
half–round
notch on right;
bevels on top
Bottom Hammer
half–round notch on left;
bevels on bottom
3. Replace the Hammers in the
Hammer Frame (13) exactly as
they were when you marked
them prior to disassembly.
4. Replace the Hammer Pins (14).
5. Examine the base of the Anvil
(9) and note its contour. While
looking down through the Ham-
mer Frame, swing the top Ham-
mer to its full extreme one way
or another until you can match
the contour of the Anvil. Insert
the Anvil into the Hammer
Frame and through the first
Hammer. Swing the bottom
Hammer in the opposite direc-
tion from the top Hammer and
maneuver the Anvil slightly until
it drops into the bottom Ham-
mer. See Figure 17.
NOTICE: Be sure to position
the Top Hammer with the half–
round notch on the right and the
bevels on the top, and the Bot-
tom Hammer with the half–
round notch on the left and the
bevels on the bottom, as shown
in Figure 17.
Assembly of the Air Wrench
1. Position the Housing (20) in
leather-covered vise jaws with
the splined shaft of the Rotor in
a horizontal position.

15
2. Place the assembled impact
mechanism down onto the
splined hub of the Rotor.
3. Position the Hammer Case
Gasket (19) against the face of
the Housing.
NOTICE: Be sure that the
small tab on outside surface of
the Gasket is located in line
with the center of the Trigger.
See Figure 18.
Figure 18
Front of Housing
Gasket
Tab
4. Apply a thin film of Craftsman
No. 18830 Grease on inside
surface of the Hammer Case
Bushing (17), and place the
Hammer Case (16) down over
the Anvil and against the Motor
Housing.
5. Install the Hammer Case
Screws (12) and tighten them to
15 in-lb (1.7 Nm) torque.

16
Trouble Probable Cause Solution
Low power Dry Motor Daily, inject 3 cc of Craftsman No.
18830 Oil into the inlet and run the
tool to lubricate the motor.
Inadequate air
supply Install proper air supply and connec- tion. Refer to Figure 1 on Page 6.
Dirty Inlet bushing
Screen Using a clean, suitable, cleaning solution in a well ventilated area,
clean the Inlet Bushing Screen.
Worn or broken
Vanes Replace a complete set of Vanes
Worn or broken
Cylinder and/or
scored End Plates
Examine Cylinder. Check outside
and ends for wear or damage and
inside for scored or wavy bore. Re-
place Cylinder if any of these condi-
tions exist. Replace End Plates if
they are scored.
Dirty motor parts. Disassemble the Tool and clean
with a suitable, cleaning solution in
a well ventilated area. Assemble the
Tool and inject 3 cc of the recom-
mended oil into Inlet and run Tool to
lubricate internal parts.
Damaged Re-
verse Valve Replace Reverse Valve. Refer to Installation of Reverse Valve.
Motor will
not run Incorrect assem- bly of motor Disassemble motor and replace worn or broken parts and reassem-
ble. Refer to Assembly of the
Motor.
Insufficient lubri-
cant in impact
mechanism.
Lubricate impact mechanism
through Hammer Case Grease
Fitting using the recommended
grease.
Tool will not
impact Broken or worn impact mecha-
nism parts
Remove Hammer Case Assembly
and examine impact mechanism
parts. Replace any worn or broken
parts.
Impact mecha-
nism not as-
sembled correctly.
Refer to Assembly of Impact
Mechanism.

17
235.185930
Figure 20

18
PART NUMBER PART NUMBER
1Cylinder . . . . . . . . . . . . . . . . . . . . . . 2141–3 19 Hammer Case Gasket . . . . . . 2141–36
2 Front End Plate . . . . . . . . . . . . . . . 2141–11 20 Housing Assembly . . . . . . . . . CR2141–B40
3 Front Rotor Bearing . . . . . . . . . . . R38P–606 21 Warning Label . . . . . . . . . CR2141–99
4 Rear Rotor Bearing . . . . . . . . . . . . 2131–97 22 Nameplate . . . . . . . . . . . . CR2141–301
5 Vane Packet (set of 6 Vanes) . . . . 2141–42–6Inlet Bushing Assembly . . . . . 2141–D565
6 Rotor . . . . . . . . . . . . . . . . . . . . . . . . 2141–53 23 Inlet Bushing . . . . . . . . . . . . 2141–565
7 Rear Rotor Bearing Retainer . . . . 2131–624 Inlet Bushing Screen . .. 5RA–61
8 Motor Gasket . . . . . . . . . . . . . . . . . 2141–283 25 Inlet Retainer Clip . . . . . . 2141–57
9 Anvil Assembly (3/4”drive) . . . . . . 2141–A626 26 Inlet Parts Kit . . . . . . . . . . 2141–K303
10 Socket Retainer . . . . . . . . . . . 908B5–918 27 Inlet Bushing Seal . . . . R4–210
11 Socket Retainer O–ring . . . . . AF120–289 28 Tilt Valve Spring . . . . . . 2131–51
12 Hammer Case Screw (4) . . . . . . . 2141–638 29 Tilt Valve . . . . . . . . . . . . 2141–302
Hammer Frame Assembly . . . . . . 2141–A703 30 Tilt Valve Seat . . . . . . . 2141–303
13 Hammer Frame . . . . . . . . . . . . 2141–703 31 Tilt Valve Seat
14 Hammer Pin (2) . . . . . . . . . . . . 2141–704 Support . . . . . . . . . . . . . 2141–306
15 Hammer (2) . . . . . . . . . . . . . . . . . . . 2141–724 32 Tilt Valve Seat
16 Hammer Case Assembly . . . . . . . CR2141–727 Retainter . . . . . . . . . . . . SML8–24
17 Hammer Case
Bushing . . . . . . . . . . . . . . . . . . 2141–641
18 Grease Fitting . . . . . . . . . . . . . D0F9–879

19
PART NUMBER PART NUMBER
33 Trigger Assembly . . . . . . . . . . . . . . . . 2141–A93 41 Power Management Dial . . . . . . . . . 2131–A249
34 Trigger O–ring . . . . . . . . . . . . . . . ––––– 42 Power Management Dial Seal –––––
35 Reverse Valve Assembly . . . . . . . . . 2141–A329 43 Inlet Clip Removal Tool . . . . . . . . . . 2131–322
36 Reverse Valve O–ring (top) . . . . ––––– * Craftsman Pneumatic Tool Care Kit
37 Reverse Valve O–ring (Oil, Grease) (Available through
(bottom) (blue) . . . . . . . . . . . . . . ––––– CraftsmanRcatalog) . . . . . . . . . . . . 9–18830
38 Button Kit . . . . . . . . . . . . . . . . . . . . . . . 2141–K75 * Owner’s Manual . . . . . . . . . . . . . . . . P7463
39 Forward Button . . . . . . . . . . . . . . –––––
40 Reverse Button . . . . . . . . . . . . . . –––––
* Not illustrated.

20
GARANTÍA TOTAL DE DOS AÑOS
Si este producto fallara debido a un defecto en el material de fabricación
o la mano de obra dentro de los dos años a partir de la fecha de
adquisición, Sears lo repararáo sustituirá, según considere oportuno,
sin cargo.
Entregue el producto en un centro de servicio Sears para su reparación, o
en el lugar donde se comprópara cambiarlo por otro.
Esta garantía le otorga derechos legales específicos, y puede que tenga
además otros derechos que varían de un estado a otro.
Sears, Roebuck and Co., Dept. 817WA, Hoffman Estates, IL 60179, EE.UU.
de América