Atlas Copco LMS08 SR42 Instruction sheet

LMS08 SR42
Printed Matter No. 9836 6515 00 Impact Wrench
Product Instructions
Valid from Serial No. A3540001
2015-04
8434 1081 06LMS08 SR42 (7-45Nm)
WARNING
Read all safety warnings and instructions
Failure to follow the safety warnings and
instructions may result in electric shock, fire
and/or serious injury.
Save all warnings and instructions for
future reference

Table of content
Product information .......................................................................3
EN
Installation ....................................................................................5
EN
Operation .....................................................................................6
EN
Service .........................................................................................7
EN
Spare part list ..............................................................................13
EN
Accessories .................................................................................16
EN
© Atlas Copco Industrial Technique AB - 9836 6515 00
2
LMS08 SR42Table of content

General information
TWARNING
• Read all safety warnings and all instructions.
Failure to follow the warnings and instructions may result in electric shock, re and/or serious injury.
• Save all warnings and instructions for future reference.
Safety signal words
The safety signal words Danger, Warning, Caution, and Notice have the following meanings:
DANGER indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
DANGER
WARNING indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
WARNING
CAUTION, used with the safety alert symbol, indicates a hazardous situation
which, if not avoided, could result in minor or moderate injury.
CAUTION
NOTICE is used to address practices not related to personal injury.NOTICE
Warranty
Contact the Atlas Copco sales representative within your area to claim a product. Warranty will only be approved
if the product has been installed, operated and overhauled according to the Operating Instructions.
Please also see the delivery conditions applied by the local Atlas Copco company.
ServAid
ServAid is a utility for providing updated product information concerning:
- Safety instructions
- Installation, Operation and Service instructions
- Exploded views
ServAid facilitates the ordering process of spare parts, service tools and accessories for the product of your
choice. It is continuously updated with information of new and redesigned products.
You can use ServAid to present content in a specic language, provided that translations are available, and
to display information about obsolete products. ServAid offers an advanced search functionality of our entire
product range.
ServAid is available on DVD and on the web:
http://servaidweb.atlascopco.com
For further information contact your Atlas Copco sales representative or e-mail us at:
[email protected]
Further information
For further information concerning this product, please see Printed Matter No. -, available in ServAid on the
web.
Overview
Applications
This powerful, high-speed impact wrench (LMS) is typically used for loosening applications where fast tight-
ening or disassembly is needed.
3
© Atlas Copco Industrial Technique AB - 9836 6515 00
Product informationENLMS08 SR42

Service intervals
Service recommendations
Overhaul and preventive maintenance is recommended at regular intervals. See the Preventive maintenance
section for detailed information regarding overhaul of your tool and specic parts. If the machine is not working
properly, it should immediately be taken away for inspection. At the overhauls, all parts should be cleaned ac-
curately and defective or worn parts should be replaced.
© Atlas Copco Industrial Technique AB - 9836 6515 00
4
LMS08 SR42ENProduct information

Installation requirement
General
The machine is designed for a working pressure (e) of 6.3 - 7 bar (max.) = 630 - 700 kPa (90 - 102 psi).
If the compressed air line pressure is higher than 7 bar it is preferable reduced with a pressure regulator of
the type Atlas Copco REG.
The Atlas Copco Air Line Test equipment is suitable for checking of air pressure and airow at the installation
point (please see AirLine Accessories in our main catalogue).
The machine can operate at a lower working pressure. Maximum torque will be reduced at lower pressures.
AIf frequent used for tightening or loosening that need longer time than 3-5 seconds, a larger wrench
should be used. Otherwise the servicelife of the impact mechanism will be reduced.
To avoid pressure drop use recommended hosesize, length, and connections. For more information please read
Atlas Copco Airline Installations, Ordering No. 9833 1191 01.
Air quality
• For optimum performance and maximum machine life we recommend the use of compressed air with a
maximum dew point of +10°C. We also recommend the installation of an Atlas Copco refrigeration-type air
dryer.
• Use a separate air lter of type Atlas Copco FIL. This lter removes solid particles larger than 15 microns
and also removes more than 90 % of liquid water. The lter must be installed as close as possible to the
machine/equipment and prior to any other air preparation unit such as REG or DIM (please see Air Line
Accessories in our main catalogue). Blow out the hose before connecting.
Models which need air lubrication:
• The compressed air must contain a small quantity of oil.
We strongly recommend that you install an Atlas Copco oil-fog lubricator (DIM). This should be set according
to air consumption by the air line tool according to the following formula:
L= Air consumption (litre/s).
(May be found in our sales literature).
D= Number of drops per min (1 drop = 15 mm3)
L* 0.2 = D
this applies to the use of long work cycle air line tools. A single point lubricator type Atlas Copco Dosol can
also be used for tools with short running cycles.
Information about Dosol settings may be found under Air Line Accessories in our main catalogue.
Lubrication-free models:
• In the case of lubrication-free tools it is up to the customer to decide on the peripheral equipment to be used.
However, it is no disadvantage if the compressed air contains a small quantity of oil e.g. supplied from a fog
lubricator (DIM) or Dosol system. This does not apply to turbine tools, which should be kept oil free.
Installation proposal
Choosing the correct couplings, hose and clamps can be a troublesome digging into details. To save your time
and to ensure correct capacity of the airline installation, from the tapping point to the tool, we offer you an in-
stallation proposal.
ErgoQIC 08 


ErgoNIP 10 

8202 1180 77
ErgoNIP 08
Male 1/4" BSP
5 m CABLAIR 08
BALL VALVE + MIDI F/R 15 +ERGOQIC 10
8202 0845 48
ip22
Filtered, regulated and injection lubricated air for a
max. air flow of 8 l/s
For more information please read, Atlas Copco Industrial Power Tools catalogue Ordering No. 9837 3000 01.
5
© Atlas Copco Industrial Technique AB - 9836 6515 00
InstallationENLMS08 SR42

Ergonomics
Ergonomic guidelines
Consider your workstation as you read through this list of general ergonomic guidelines and see if you can
identify areas for improvement in posture, component placement, or work environment.
• Take frequent breaks and change work positions frequently.
• Adapt the workstation area to your needs and the work task.
• Adjust for convenient reach range by determining where parts or tools should be located to avoid static
load.
• Use workstation equipment such as tables and chairs appropriate for the work task.
• Avoid work positions above shoulder level or with static holding during assembly operations.
• When working above shoulder level, reduce the load on the static muscles by reducing the weight of the
tool, using for example torque arms, hose reels or weight balancers. You can also reduce the load on the
static muscles by holding the tool close to the body.
• Make sure to take frequent breaks.
• Avoid extreme arm or wrist postures, particularly for operations requiring a degree of force.
• Adjust for convenient eld of vision by minimizing movement of the eyes and head during the work task.
• Use the appropriate lighting for the work task.
• Select the appropriate tool for the work task.
• Use ear protection equipment in noisy environments.
• Use high-quality inserted tools or consumables to minimize exposure to excessive levels of vibration.
• Minimize exposure to reaction forces.
• When cutting:
A cut-off wheel can get stuck if the wheel is either bent or if it is not guided properly. Make sure to use
the correct anges for cut-off wheels and avoid bending the wheel during cut-off operation.
• When drilling:
The drill might stall when the drill bit breaks through. Makes sure you use support handles if the stall
torque is too high. The safety standard ISO11148 part 3 recommends using something to absorb the reaction
torque above 10 Nm for pistol grip tools and 4 Nm for straight tools.
• When using direct-driven screw or nutrunners:
Reaction forces depend on tool setting and joint characteristics. The ability to bear reaction forces depends
on the operator’s strength and posture. Adapt the torque setting to the operator's strength and posture and
use a torque arm or reaction bar if the torque is too high.
• Use dust extraction system or mouth protection mask in dusty environments.
Operating instructions
Tightening torque
The tightening torque attained depends on the air pressure, tightening time and bolted joint in question. Extension
pieces and worn sockets will reduce the effective tightening torque. Oversized power sockets (diameter and or
length) will overload the impact mechanism and reduce the life of vital parts as the impact mechanism. The
impact wrench must be used within the specied torque range. Never exceed the recommended maximum
tightening torque.
Test methods
Measurement using a hydraulic Torque Tension tester is recommended for testing tool performance, see Test
data.
© Atlas Copco Industrial Technique AB - 9836 6515 00
6
LMS08 SR42ENOperation

Maintenance
Service instructions
Overhaul and preventive maintenance are recommended at regular inter-
vals once a year or after max. 100 000 tightening operations at the latest,
whichever comes rst. More frequent overhauls may be required if the
machine is used for heavy-duty applications. If the machine fails to
function correctly, it must be decommissioned immediately for inspec-
tion.
The strainer at the air inlet must be cleaned regularly in order to pre-
vent clogging due to contamination. The machine capacity will otherwise
be reduced.
All parts must be cleaned thoroughly during overhaul work and defect-
ive or worn parts must be replaced
It is important to ensure that the threaded connections on the machine
are tightened properly; i.e. in accordance with the specications in the
exploded views. Lubricate the threads with grease prior to tting.
AAll O-rings must be greased prior to assembly.
When the machine is in constant operation, installation of an Atlas Copco
DIM oil mist lubricating device or a Dosol type single point lubricating
device is recommended.
Impact mechanism
Check the specied wear limits and replace all parts which exceed these.
See Inspection.
ARecommended maximum wear limits for the clutch jaw, anvil
and driver.
Rust protection and internal cleaning
Water in the compressed air, dust and wear particles cause rust and
sticking of vanes, valves etc. An air lter should be installed close to
the machine (see 'Air quality'). Before longer standstills, ush with oil
(some drops) into the air inlet, run the machine for 5-10 seconds when
absorbing the oil in a cloth.
How to optimize service and performance of your
impact wrench
The service life of the impact mechanism is mainly de-
pendent on:
•service intervals
•air pressure
•tightening time/torque
•number of tightening
•socket/bolt size
•socket length
7
© Atlas Copco Industrial Technique AB - 9836 6515 00
ServiceENLMS08 SR42

Service intervals
Shorter service intervals with cleaning and lubrication of the impact
parts will improve the function and reduce the wear. Follow our service
recommendations.
Air pressure, tightening time/torque and number of tightening
It is obvious that wear will increase with increased air pressure, longer
tightening time/higher torque and number of tightening.
A tightening time of 1-5 seconds is recommended. The Skidmore-
Wilhelm table in Test data can be used as a guide for max. tightening
time.
Longer tightening or loosening times will increase wear, producing
malfunction and risk of breakage.
Socket and bolt size
Each impact wrench covers a certain bolt size range. The impact mech-
anism parts have been designed for good durability in combination with
the recommended standard socket/bolt size.
Usage of oversized sockets/bolts will increase premature wear and
risk of breakage.
If frequent square drive breakages occur and different square drive
sizes are avaliable, use the largest size.
Long sockets/extensions
It is better to use extensions + standard socket instead of long or extra
long sockets as the lower inertia /mass of the extension will give less
stress on the impact mechanism. However an extension will reduce the
applied torque to some degree.
s005530
Long socketExtension + socket
Recommendations for maximum socket / bolt size
A/F
B
L
D
d
S
s011091
Bolt size
B (max)
Socket opening
A/F (max)
Socket size
D (max)
Socket length
L (max)
Socket size
d (max)
Drive
S
M8 (5/16")13mm (1/2")20mm34mm22mmQuick change
1/4"
© Atlas Copco Industrial Technique AB - 9836 6515 00
8
LMS08 SR42ENService

Dismantling/ Assembling
Symbols
= Grease = Oil = Press
s011130
Motor bearings
1
2
Press
Dismantling Assembling
s000220
Remark / Included in Service kitDescriptionQtyOrdering No.Ref. No.
Mandrel14080 0182 071
Mandrel14080 0567 022
Inspection
Inspection for wear on impact parts
s000480
B
A
C
Wear limits
Driver
C (max)
Clutch jaw
B (max)
Anvil
A (max)
1.5 mm1.1 mm1.1 mm
Inspection of silencer
Change or clean the lters regularly. Clogged lters will reduce power
output.
9
© Atlas Copco Industrial Technique AB - 9836 6515 00
ServiceENLMS08 SR42

Inspection of motor parts
s012502
check
•Clean all parts before inspection.
•End plates: Check that they not are scored or scratched. If these are
shallow, polish with ne grinding paste against a face plate. Clean
thoroughly.
•Rotor: Check that the end faces do not have any marks or burrs.
Check that the splines are not worn or cracked. Check that there are
no cracks at the holes for the plugs.
•Cylinder: Check that the bore is not scored or scratched. If these are
shallow, polish with a ne grinding cloth. Clean thoroughly.
Lubrication
Lubrication guide
Air and motor lub-
rication
Impact mechanismGeneral purpose
grease
Brand
Energol E46Energrease LS-EP2BP
Spheerol EP L2Castrol
Arox EP46Beacon EP2Esso
Chopin 46Rembrandt EP2Q8
Almo oil 525Mobilegrease XHP
222
Mobil
Torcula 32Alvania Grease RL 2Alvania EP2Shell
Aries 32Multifak EP2Texaco
Molycote
Lubrication of impact mechanism
s000150
Spread a layer of grease on all sliding and impact surfaces. Use the rest
of the grease, approximately half the amount, inside the cavity of the
hammer and on the driver ange. Total grease amount 1ml.
© Atlas Copco Industrial Technique AB - 9836 6515 00
10
LMS08 SR42ENService

Lubrication of motor parts
s001000
Note
•No grease is needed for protected Ball bearings (ex. 2Z).
•Where oil is needed, apply only a thin layer.
11
© Atlas Copco Industrial Technique AB - 9836 6515 00
ServiceENLMS08 SR42

Test data
Test on Tension tester (Skidmore-Wilhelm)
s005371
Test performance:
Test equipment according to the tables below.
Assemble selected test bolt set in the tester ensuring that threads and
pressure faces are well lubricated with Molycote Longterm W2 or sim-
ilar molybdenum disulphide lubricant.
Make 3 tightenings and check that the minimum tension can be
reached.
Test conditions:
Air pressure = 6.3 bar (90 psi) dynamic.
Test result
Test hose (3 m)
inner diam.
Min. *
Free speed
Tightening
time
Min.
TensionBolt sizeTesterModel
6.3 mm (1/4”)11000 rpm2 s34 kN5/8”Skidmore-Wilhelm model JLMS08 HR10
6.3 mm (1/4”)11000 rpm2 s21 kN5/8”Skidmore-Wilhelm model JLMS08 HR42
6.3 mm (1/4”)11000 rpm2 s33 kN5/8”Skidmore-Wilhelm model JLMS08 SR10
6.3 mm (1/4”)11000 rpm2 s19 kN5/8”Skidmore-Wilhelm model JLMS08 SR42
10 mm (3/8”)7000 rpm2 s39 kN7/8”Skidmore-Wilhelm model JLMS18 HR10
10 mm (3/8”)7000 rpm2 s53 kN7/8”Skidmore-Wilhelm model JLMS18 HR13
10 mm (3/8”)8000 rpm2 s83 kN3/4”Skidmore-Wilhelm model RLLMS28 HR13
10 mm (3/8”)6800 rpm2 s110 kN1”Skidmore-Wilhelm model RLLMS38 HR13
12.5 mm (1/2”)5500 rpm3 s161 kN1”Skidmore-Wilhelm model RLLMS48 HR20
12.5 mm (1/2”)4700 rpm3 s260 kN1 1/4”Skidmore-Wilhelm model HLMS58 HR20
12.5 mm (1/2”)4700 rpm3 s270 kN1 1/4”Skidmore-Wilhelm model HLMS58 HR25
16 mm (5/8”)4200 rpm4 s470 kN1 1/2”Skidmore-Wilhelm model HLMS68
16 mm (5/8”)3200 rpm6 s660 kN2”Skidmore-Wilhelm model KLMS88
* = If Free speed is to low: check silencer for clogged lters.
© Atlas Copco Industrial Technique AB - 9836 6515 00
12
LMS08 SR42ENService

Exploded views/tables
Spare parts
Parts without ordering number are not delivered separately for technical reasons.
The use of other than genuine Atlas Copco replacement parts may result in decreased tool performance and
increased maintenance and may, at the company option, invalidate all warranties.
Front part
1
2 3 4
5
6
7 78 9 10 11 12
13 14 15 16 17 18 19 20 21
= Included in
Service Kit
0001261
4080 0848 80
40 Nm
4080 0848 80
40 Nm
0
Remark / Included in Service kitDescriptionQtyOrdering No.Ref. No.
Clutch housing, compl.14250 2947 901(2-4)
13.1x1.6 / Service kit 4081 0465 90O-ring1-2
AF35Clutch housing1-3
35.1 x 1.6 / Service kit 4081 0465 90O-ring1-4
1/4” Internal hex.Anvil, compl.14250 2949 905(6-12)
Hex 1/4”Quick change chuck14250 1512 906(7-11)
A 12Snap ring20335 3512 047
Ring1-8
Spring1-9
Sleeve1-10
Ø 4 mmBall10517 1106 0011
Anvil1-12
Hammer14250 2944 0013
Clutch jaw14250 2945 0014
27.1x1.6 / Service kit 4081 0465 90O-ring1-15
Cam14250 1356 0116
Washer14250 1352 0017
Driver14250 2946 0018
Cover14250 2794 0019
SGA 12 / Service kit 4081 0465 90Circlip1-20
Intermediate part14250 2948 0021
Ø27-64 x Ø4.3 mmAdjustable spanner14080 0848 80
Motor
1 2 3 4 5 6 7 8 9 10 11
0001250
= Included in
Service Kit
0000
13
© Atlas Copco Industrial Technique AB - 9836 6515 00
Spare part listENLMS08 SR42

Remark / Included in Service kitDescriptionQtyOrdering No.Ref. No.
607-2ZBall bearing10502 0100 121
End plate14110 1289 032
2x1x12 / Service kit 4081 0465 90Key1-3
5x1 / Service kit 4081 0465 90O-ring1-4
5 pcsVane, kit14110 0861 955
z=9Rotor14250 1351 036
3.5x1.2 / Service kit 4081 0465 90O-ring1-7
Cylinder14210 0324 008
2x14 / Service kit 4081 0465 90Pin1-9
End plate14210 0322 0010
625-2ZBall bearing10502 1090 9111
Accessory included. Service tool for Motor. For further information, pls see Service
instructions
Motor service tool14080 1331 82
Ø75/85 mm. Service tool for Motor. For further information, pls see Service instructionsMandrel14080 0206 08
Ø68 x 10 mm. Service tool for dismantling/ assembling of Motor bearings. For further
information, pls see Service instructions
Plate14080 0208 03
Ø55/65 mm. Service tool for dismantling/ assembling of Motor bearings. For further
information, pls see Service instructions
Mandrel14080 0206 07
Motor casing
1
2 3 4
5
67
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
3005801
OFF 12 Nm
22 mm
OFF 20 Nm
34 mm
OFF 30 Nm
Remark / Included in Service kitDescriptionQtyOrdering No.Ref. No.
Back head, compl.14210 1281 801(2-24)
Back head1-2
17.1x1.6O-ring10663 6124 003
G1/4". With NPT-thread (for the US, Canada) 4150 0588 82Adapter, compl.14150 0588 804
Lever, kit14210 0135 905(6-7)
Lever1-6
CP 4x22Pin10101 1245 007
Suspension yoke14210 0243 008
Valve, compl.14150 0594 909(10-15)
3.1x1.6O-ring10663 6110 0010
4.3x2.4O-ring10663 2111 0011
Valve14150 0594 0012
Spring14210 0252 0013
9.2 X 1.8O-ring10663 9057 0014
© Atlas Copco Industrial Technique AB - 9836 6515 00
14
LMS08 SR42ENSpare part list

Remark / Included in Service kitDescriptionQtyOrdering No.Ref. No.
Plug14106 2034 0015
Trigger, compl.14210 1663 8016(17-24)
1.5h6x16Pin14210 0553 0017
Slide14210 0540 0018
Spring14210 0541 0019
7.2x1O-ring1-20
Guide1-21
6x1O-ring10663 9005 0022
Trigger1-23
FRP 1.5x5Pin10108 1120 0024
Silencer24210 0421 0025
Exhaust gard14210 0422 0026
Jacket14210 0432 8027
Service Kits
Service kit — Front part / Motor
Ordering No. 4081 0465 90
Remark / Included in Service kitDescriptionQtyOrdering No.
13.1x1.6O-ring1-
35.1 x 1.6O-ring1-
27.1x1.6O-ring1-
SGA 12Circlip1-
2x1x12Key1-
5x1O-ring1-
3.5x1.2O-ring1-
2x14Pin1-
Service kits are designed for a variety of products. This Service kit may contain more parts than listed in the
table and parts might remain unused.
Service Tools
Service Tools
For motor
RemarkDescriptionOrdering No.Section
Mandrel4080 0182 07Motor bear-
ings
Mandrel4080 0567 02Motor bear-
ings
Ø27-64 x Ø4.3 mmAdjustable spanner4080 0848 80Front part
Accessory included. Service tool for Motor. For further information, pls see Service
instructions
Motor service tool4080 1331 82Motor
Ø75/85 mmService tool for Motor. For further information, pls see Service instructionsMandrel4080 0206 08Motor
Ø68 x 10 mmService tool for dismantling/ assembling of Motor bearings. For further
information, pls see Service instructions
Plate4080 0208 03Motor
Ø55/65 mmService tool for dismantling/ assembling of Motor bearings. For further in-
formation, pls see Service instructions
Mandrel4080 0206 07Motor
15
© Atlas Copco Industrial Technique AB - 9836 6515 00
Spare part listENLMS08 SR42

Accessories included
Cup
Remark / Included in Service kitDescriptionQtyOrdering No.Ref. No.
For filling Impact mechanism with grease, see service instructionCup4080 1358 00
Suspension yoke
1
2000120
Remark / Included in Service kitDescriptionQtyOrdering No.Ref. No.
Suspension yoke14210 0243 001
© Atlas Copco Industrial Technique AB - 9836 6515 00
16
LMS08 SR42ENAccessories

Atlas Copco Industrial
Technique AB
SE-10523 STOCKHOLM
Sweden
Tel ephone: [phone]
Tel efax: [phone]
www.atlascopco.com
©Copyright 2012, Atlas Copco Industrial Technique AB. All rights reserved. Any
unauthorized use or copying of the contents or part thereof is prohibited. This
applies in particular to trademarks, model denominations, part numbers and
drawings. Use only authorized parts. Any damage or malfunction caused by the
use of unauthorized parts is not covered by Warranty or Product Liability.
Out of respect to wildlife and nature, our technical literature is printed on
environmentally friendly paper.