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
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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
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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
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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.
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© 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
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LMS08 SR42ENService