Tightening Torque - Atlas Copco LUM 22 HR 10 Bedienungsanleitung

ENGLISH – Instructions
!
Warning
Make sure you are familiar with the operating instructions
before you use this machine.
Before making any adjustments (e.g. setting the torque,
changing bits) disconnect the machine from the compressed
air line.
The machine, together with any attachments and
accessories, must never be used for anything other than the
designed purpose.
Use power sockets only. For safe and economic use - replace
worn sockets.
Check that the power socket is properly fastened - replace
the square drive retainer when necessary.
Keep your fingers and loose articles (cloths, hair) away from
the outgoing shaft.
Hold the machine correctly and be aware of the reaction
force.
Check the position of the reversing valve before start.
Check the correct clutch function after any adjustment.
Decreased air pressure may produce that the clutch not
disconnect properly.
Check that the suspension yoke is in good condition and
correctly fastened.
Use support handle or torque arm at high torque settings or
stressed working positions.
Air quality

For optimum performance and maximum machine life we
recommend use of compressed air with a dew point between
+2°C and +10°C. Installation of an Atlas Copco
refrigeration-type air dryer is recommended.

Use a separate air filter of type Atlas Copco FIL installed as
close as possible to the machine and prior to any other air
preparation unit like REG or DIM (please see Air Line
Accessories in our main catalogue). Blow out the hose before
connecting.

There is no disadvantage for the operation of the machine if the
compressed air contains a small quantity of oil (1-5 mg/m
quality according to ISO 8573-1, quality class 2.4.3. or 3.4.4. is
recommended.
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.
Note The machine can operate at a lower working pressure (min. 4
bar). If this is the case, the pre-set torque must be kept low
enough to ensure shut off.
To avoid pressure drop use recommended hosesize, length, and
connections. For more information please read Atlas Copco Airline
Installations, Ordering No. 9833 1191 01.
The Atlas Copco Air Line Test equipment is suitable for checking of
air pressure and airflow at the installation point (please see AirLine
Accessories in our main catalogue).
Operating instructions
See figure in Service instructions
4

Tightening torque

Adjusting of tightening torque see Technical Instructions.
For accurate operation and safety, the tightening torque of the
screwdriver must be adjuisted correctly in relation to the screw joint.
Check the torque specification for the actual joint.
The tightening torque is adjusted by altering the tension of the clutch
spring. Turn the protection ring until the hole in the clutch housing is
free. Then turn the out going spindle until you can see the keyhole in
the adjustment washer. Turn the adjustment key clockwise to
decrease and anticlockwise to increase the torque. After the
adjustment, turn the protective ring back again.
Verification of tightening torque
Atlas Copco Torque Analyser, ACTA 3000, plus an
appropriately-sized in-line transducer, IRTT together with the
available test joints are recommended equipment.
Torque range of the clutch springs
Note Each clutch spring gives a certain torque range. Don't adjust
the torque over the maximum recommendation as that might
result in improper function and faster wear of the clutch.
The torque range of each spring is easily identified by it's colour.
For maximum performance
At tough working conditions - soft joints and max. setting - lubrication
of the air is recommended.
With extreme dry air service life of vanes and tool power maybe
reduced. A daily supply of oil (0.1 - 0.2 ml into the machine inlet or
consider an automatic lubricator device of the type Atlas Copco oil
fog lubricator DIM or single point lubricator DOS, which will improve
the machine performance.
Rust protection and internal cleaning
Water in the compressed air, dust and wear particles cause rust and
sticking of vanes, valves etc. An air filter should be installed close to
the machine (se 'Air quality'). Before longer standstills, flush with oil
(some drops) into the air inlet, run the machine for 5-10 seconds
when absorbing the oil in a cloth.
Service instructions (see Technical Instructions)
Overhaul and preventive maintenance is recommended at regular
intervals once per year or after maximum 250.000 tightenings
3
). Air
depending on which occurs sooner. More frequent overhaul may be
needed, if used at high torque and long tightening times. If the
machine not is working properly, it should immediately be taken away
for inspection.
The strainer at the air inlet and the exhaust silencer should be
cleaned frequently or replaced in order to prevent clogging, which
decreases the capacity.
At the overhauls, all parts should be cleaned accurately and defective
or worn parts (i.e. O-rings, vanes) should be replaced.
Disassembling / assembling
It is important that the machines threaded connections are tightened
properly; i.e. in accordance with the specifications on the exploded
views.
Cleaning
Clean all parts thoroughly in white spirit or similar cleaning agent.
To prevent clogging and decreased power, it could be necessary to
clean the strainer (if used) and the exhaust filter between the
overhauls.
Inspection
After the cleaning, inspect all parts. Damaged and worn parts should
be replaced.
Atlas Copco Tools – No. 9836 2017 00
LUM 22 HR 10