Atlas Copco EP8PTX70 HR10-RE Instruction sheet

EP8PTX70 HR10-RE
Printed Matter No. 9836 9508 00 Nutrunner
Valid from Serial No. A6820001
2015-08-01 Product Instructions
EP 8PTX-70 HR10-RE (40-70 Nm) 8431 0375 60
WARNING
Read all safety warnings and instructions
Failure to follow the safety warnings and in-
structions may result in electric shock, fire and/
or serious injury.
Save all warnings and instructions for future
reference

2© Atlas Copco Industrial Technique AB - 9836950800
Table of Contents
EN Product Instructions.......................................................................... 3
FR Instructions sur le produit .............................................................. 27
DE Produktanweisungen...................................................................... 39
ES Instrucciones del producto ............................................................ 52
PT Instruções do produto .................................................................... 64
IT Istruzioni sul prodotto..................................................................... 75
NL Productinstructies ........................................................................... 86
DA Produktanvisninger......................................................................... 97
NO Produktanvisninger....................................................................... 108
FI Tuoteohjeet.................................................................................... 119
SV Produktanvisningar....................................................................... 130
RU Инструкции по изделию ............................................................ 142
CS Pokyny týkající se produktu ........................................................ 154
ET Tootejuhised .................................................................................. 178
LT Gaminio instrukcijos ..................................................................... 189
LV Produkta instrukcija ...................................................................... 200
ZH 产品说明......................................................................................... 211
JA 製品の説明書................................................................................. 232

EP8PTX70 HR10-RE EN Safety and operating instructions
© Atlas Copco Industrial Technique AB - 9836 950800 00 3
Safety and operating instructions
Safety 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) dis-
connect 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 away from the power socket during operation to avoid in-
jury.
• Never work without protective goggles.
• Avoid unnecessary idling.
• When using a suspension yoke, check that it is in good condition and cor-
rectly fastened.
Warning
Disassembly and assembly precautions
The rotor blades (vanes) in the tool contains PTFE. The normal health and
safety recommendations concerning PTFE must be observed when handling
these rotor blades. Particles from wear of blades might be found in the machine
housing or on the blades. Make sure that these particles do not get in contact
with open fire. Wash your hands before smoking since PTFE-particles heated
by glow can produce fumes which may cause an allergic reaction.
General information
EC DECLARATION OF CONFORMITY
We, Atlas Copco Industrial Technique AB, S-105 23 STOCKHOLM, SWE-
DEN declare that the product (with name, type and serial number, see front
page) is in conformity with the following Directive(s):
2006/42/EC
Harmonised standards applied:
ISO 11148-6
Technical file available from:
Quality Manager, Atlas Copco Industrial Technique, Stockholm, Sweden
Stockholm, 1 July 2013
Tobias Hahn, Managing Director
Signature of issuer

Safety and operating instructions EN EP8PTX70 HR10-RE
4© Atlas Copco Industrial Technique AB - 9836 950800 00
Installation
Installation of vibrating tools
It is recommended that a minimum length of 300 mm of flexible hose for com-
pressed air is inserted between a vibrating tool and the quick-action coupling.
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 rec-
ommend the installation of an Atlas Copco refrigeration-type air dryer.
• Use a separate air filter of type Atlas Copco FIL. This filter removes solid
particles larger than 15 microns and also removes more than 90 % of liquid
water. The filter must be installed as close as possible to the machine/equip-
ment 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 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)
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 lubri-
cator 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 com-
pressed air contains a small quantity of oil e.g. supplied from a fog lubrica-
tor (DIM) or Dosol system.
•Note – This does not apply to turbine tools, which should be kept oil free.
Compressed air connection
• The machine is designed for a working pressure of 6–7 bar = 600–700 kPa =
87–102 psi.
• Blow out the hose before connecting.
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 in-
stallation, from the tapping point to the tool, we offer you an installation pro-
posal.

EP8PTX70 HR10-RE EN Safety and operating instructions
© Atlas Copco Industrial Technique AB - 9836 950800 00 5
For more information please read, Atlas Copco Industrial Power Tools cata-
logue Ordering No. 9837 3000 01.
Handling
Setting of tightening torque
The adjusting screw (the slotted screw) is the only screw that initially
should be adjusted.
Start at a low torque adjustment and gradually increase the setting until you
reach the desired torque level. Using the machine above recommended maxi-
mum torque might result in improper function and faster wear.
Always check the setting on your actual joint.
see Service Instructions.
RE-version
At hard joints and low tightening torque settings, reduced free speed by the
Trim-valve will improve the accuracy.
Reporting, RE-signal
Reporting (RE) machines supply an air signal that can be connected to a moni-
toring instrument that counts the number of approved tightening and detects
premature shut-off and rehits and other irregularities.
Test method - Static or Dynamic
A static torque measurement is recommended for the ErgoPulse machines.
If dynamic torque measurement with an electronic inline torque transducer is
used, always verify your measurement result by a static check with a torque
wrench (electronic).
For more information, read Atlas Copco "Pocket Guide to Pulse Tools". Order-
ing No. 9833 1225 01.
Maintenance
For maximum performance
At tough working conditions – soft joints and max. setting – lubrication of the
air is recommended.
With extreme dry air the service life of vanes and machine performance might
be reduced. A daily supply of 0.1 – 0.2 ml oil into the machine inlet will im-
prove the machine performance. Alternatively consider an automatic lubricator
device, Atlas Copco oil fog lubricator DIM, or single point lubricator DOS,
which will improve the machine performance.

Safety and operating instructions EN EP8PTX70 HR10-RE
6© Atlas Copco Industrial Technique AB - 9836 950800 00
Refill the pulse-unit with oil
For further information pls see - Service Instructions.
For optimum machine performance the pulse unit must be correctly filled with
oil. Due to a possible microleakage of oil from the pulse unit, it could be neces-
sary to refill the unit between the regular overhaul intervals. The frequency of
this procedure depends on the type of application, number of cycles, tightening
time etc. An accurate refill of the pulse unit gives long service intervals.
Too much oil in the pulse unit implies a low pulse frequency and slow tighten-
ing.
Too little oil in the pulse unit implies a high pulse frequency and there will be a
risk of a decreasing tightening torque. In particular at the first tightening after a
break the machine might race.
Use Hydraulic Oil : 22 cST / 40 °C (ISO VG22).
Running the machine with too little oil may damage the pulse unit.
After the refill – Check the tightening torque, see Service instructions.
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
Overhaul and preventive maintenance is recommended at regular intervals once
per year or after maximum 250.000 tightening depending on which occurs
sooner. More frequent overhaul may be needed, specially replacing of oil in the
pulse unit, if used at high torque and long tightening times. If the machine is not
working properly, it should immediately be taken away for inspection.
The strainer at the air inlet and the exhaust silencer should be cleaned fre-
quently 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 should be replaced.
All o-rings should be greased before assembling; especially important are
the o-rings in the pulse unit.
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, not electrical, 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 re-
placed.

EP8PTX70 HR10-RE EN Safety and operating instructions
© Atlas Copco Industrial Technique AB - 9836 950800 00 7
Lubrication
Lubricate specially gears, valve and clutch with grease containing molybdenum
disulphide (e.g. Molykote BR2 Plus). Lubricate o-rings and threaded connec-
tions with grease before assembling.
Grease Guide ErgoPulse
Brand
General purpose
Bearings Motor shaft Air Lubrication
BP Energrease LS-EP2 Energol E46
Castrol Spheerol EP L2
Esso Beacon EP2 Arox EP46
Q8 Rembrandt EP2 Chopin 46
Mobil Mobilegrease XHP 222 Almo oil 525
Shell Alvania EP2 Tonna R32
Texaco Multifak EP2 Aries 32
Molycote BR2 Plus
Useful information
Log in to Atlas Copco www.atlascopco.com
You can find information concerning our products, accessories, spare parts and
published matters on our website.
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, compo-
nent 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 as-
sembly operations.
• When working above shoulder level, reduce the load on the static mus-
cles 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 requir-
ing a degree of force.
• Adjust for convenient field of vision by minimizing movement of the eyes
and head during the work task.
• Use the appropriate lighting for the work task.

Safety and operating instructions EN EP8PTX70 HR10-RE
8© Atlas Copco Industrial Technique AB - 9836 950800 00
• 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 ex-
cessive 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 flanges 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 abil-
ity to bear reaction forces depends on the operator’s strength and pos-
ture. 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.
Country of origin
Please refer to the information on the product label.
Spare parts
Parts without ordering number are not delivered separately for technical rea-
sons.
The use of other than genuine Atlas Copco replacement parts may result in de-
creased tool performance and increased maintenance and may, at the company
option, invalidate all warranties.
Warranty
Contact the Atlas Copco sales representative within your area to claim a prod-
uct. 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 com-
pany.
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 acces-
sories for the product of your choice. It is continuously updated with informa-
tion of new and redesigned products.

EP8PTX70 HR10-RE EN Safety and operating instructions
© Atlas Copco Industrial Technique AB - 9836 950800 00 9
You can use ServAid to present content in a specific 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]
Safety Data Sheets MSDS/SDS
The safety data sheets describes chemical products sold by Atlas Copco.
For more information, consult the website
http://www.atlascopco.com/.
Choose Products - Safety Data Sheets, and follow the instructions on the
page.

Technical data EN EP8PTX70 HR10-RE
10 © Atlas Copco Industrial Technique AB - 9836 950800 00
Technical data
Technical data
Noise and vibration emission
Noise (in accordance with ISO15744) dBA
Sound pressure level 80
Sound power level -
Uncertainty 3
Vibration total value, valid from 2010
(3-axes value in accordance with ISO28927-2) m/s2
Vibration value 3.5
Uncertainty 1
Noise and Vibration Declaration Statement
These declared values were obtained by laboratory type testing in accordance
with the stated standards and are suitable for comparison with the declared val-
ues of other tools tested in accordance with the same standards. These declared
values are not adequate for use in risk assessments and values measured in indi-
vidual work places may be higher. The actual exposure values and risk of harm
experienced by an individual user are unique and depend upon the way the user
works, the workpiece and the workstation design, as well upon the exposure
time and the physical condition of the user.
We, Atlas Copco Industrial Technique AB, cannot be held liable for the con-
sequences of using the declared values, instead of values reflecting the actual
exposure, in an individual risk assessment in a work place situation over which
we have no control.
This tool may cause hand-arm vibration syndrome if its use is not adequately
managed. An EU guide to managing hand-arm vibration can be found by ac-
cessing http://www.pneurop.eu/index.php and selecting 'Tools' then 'Legisla-
tion'.
We recommend a programme of health surveillance to detect early symptoms
which may relate to noise or vibration exposure, so that management proce-
dures can be modified to help prevent future impairment.

EP8PTX70 HR10-RE EN Service instructions
© Atlas Copco Industrial Technique AB - 9836 950800 00 11
Service instructions
How to optimize the performance of your EP/EPP tool
How to optimize the performance of your EP/EPP tool
Recommended number of pulses
A pulse tool well suited for your application should reach the target torque
(with shut off) within 5-20 pulses. The number of pulses can be measured
with a IRTT and ACTA analyser. The tightening time can also be used as a
guide to know if the tool is appropriate or not for your application:
• ≤ 1 sec. for tools up to 30Nm
• ≈1 sec. for tools up to 80Nm
• ≈2 sec. for tools up to 150Nm
• ≈5 sec. for tools up to 450Nm
• ≤ 10 sec. for tools up to 850Nm
If the target torque is achieved with less than 5 pulses (=short tightening time),
the torque scatter will increase and it can be difficult to adjust to the right level,
especially on hard joints.
If the target torque is achived with more than 20 pulses (=too long tightening
time) the wear will increase and more frequent oil filling and service will be re-
quired. Too long tightening time, in combination with high production rate,
may also result in excessive heating of the oil. In that condition the power will
decrease with even longer tightening time and perhaps no shut off.
If the target torque is achieved with less than 5 pulses adress this issue by:
• Decreasing the air pressure.
• Reducing the speed by means of the AT or Trim valve.
• If these measures are not possible or does not give acceptable results, a
smaller tool can be a better choice.
If the target torque is achieved with more than 20 pulses adress this issue
by:
• Increasing the dynamic air pressure to 6-7 bar for standard EP tools or 5-6
bar for low pressure EP PTX-L tools.
• Adjust the AT or Trim valve to give maximum power/speed.
• If these measures are not possible or does not give acceptable results, a big-
ger tool can be a better choice.
If the air pressure has been changed the target torque must be measured
again and adjusted if needed.
Air preparation
Air pressure
Adjusting the air pressure will have the following consequences:
• Decreasing the air pressure will result in a slower but more accurate tool.
• Increasing the air pressure will result in a faster but less accurate tool.
If the pressure from the airline is below 4.5 bar we recommend a tool from
the EP PTX-L series, designed for low pressure installations.

Service instructions EN EP8PTX70 HR10-RE
12 © Atlas Copco Industrial Technique AB - 9836 950800 00
Pressure regulators
We recommend using one pressure regulator for each tool. Make sure to
adjust the regulator to the lowest expected pressure on the line. A pressure
regulator will give the following advantages:
• A stable air pressure which results in better accuracy.
• Provides an easy way to adjust the power of the tool.
Air filters and air lubricators
We recommend using air filters and air lubricators, which will give the fol-
lowing advantages:
• Clean air without water and particles resulting in reduced tool wear and re-
duced risk of tool failure.
• Will help to maintain the power and speed of the air motor over time.
Trim-RE or AutoTrim valve?
Use Trim-RE valve:
• For applications where the tool is used to tighten screws with similar joint
rate.
Use AutoTrim valve:
• For applications where the tool is used to tighten both hard and soft joints.
Adjusting the AutoTrim valve
When using a tool with a AutoTrim valve make sure it is correctly adjusted, so
the switching to full power is produced after the rundown and when the pulsing
is starting.
For detailed instructions on how to adjust the AutoTrim valve see section
Settings
Incorrect adjustment of the AutoTrim valve will result in:
• Increased scatter.
• Longer tightening time.
• No shut off.
Service tools
Service tools are designed to make assembly and disassembly fast and easy
with less risk of damaging parts in the process.
Correct tightening of parts is important to:
• Optimize performance of the tool.
• Minimize the risk of parts coming loose during operation.
You can find information about service tools and tightening data in the Spare
part list section of the Product instruction.
Preventive maintenance
Preventive maintenance is recommended once per year or after a maxi-
mum of 250.000 tightening. A complete overhaul include:
• Clean the pulse unit and change worn or damaged parts.
• Clean the air motor and change worn or damaged parts.

EP8PTX70 HR10-RE EN Service instructions
© Atlas Copco Industrial Technique AB - 9836 950800 00 13
• Clean the silencer and the strainer of the inlet adapter, change the filter and
change worn or damaged parts.
• Clean the trigger and reversing valve and change worn or damaged parts.
General
Tightening of threaded connections
The tightening torques indicated in the spare parts list are established to achieve
the correct clamping force and to prevent the parts from coming loose. When
serviced these parts must be able to open up without being destroyed. In special
circumstances (depending on application and usage) the parts may however
come loose after some time of operation. In such cases the torque could be in-
creased 10-20% and if necessary some type of low or medium threadlocking
fluid could also be applied.
Example

Service instructions EN EP8PTX70 HR10-RE
14 © Atlas Copco Industrial Technique AB - 9836 950800 00
Operating Instructions
Inspection and lubrication of pulse unit

EP8PTX70 HR10-RE EN Service instructions
© Atlas Copco Industrial Technique AB - 9836 950800 00 15
Fill the pulse unit with oil on a regular basis
It is necessary to fill the pulse unit with oil on a regular basis to compensate for
micro leakage of oil between the outgoing shaft and the sealing o-ring. This is a
normal occurence in hydraulic systems. Between overhauls regularly fill up the
pulse unit with a small amount of oil without disassembling the pulse unit. The
need for adding oil to the pulse unit will vary depending mainly on the number
of tightening, torque level and number of pulses (tightening time). The need to
add oil regularly to the pulse unit will normally decrease because the o-ring will
seal better after a period of use. When the o-ring is changed the need to add oil
regularly to the pulse unit may increase again.
Do not change the o-rings in the pulse unit except at the regular overhaul
once per year or after a maximum of 250.000 tightening.
Negative effects of to little oil in the pulse unit:
• Longer tightening time
• No shut off
• Decreasing torque
• Increased scatter
• Faster wear of the parts in the pulse unit
How to detect a low oil level in the pulse unit:
• Increased pulse frequency
• Low torque, no torque or abnormal torque changes
• Very high pulsing speed, especially when the tool has not been used for a
while.
Regular measurement of the pulse frequency is the best method to detect a low
oil level in the pulse unit. If the pulse frequency has increased, preventive oil
filling can be done before a low oil level in the pulse unit affects the function of
the tool. The pulse frequency can be measured with a static torque transducer
(SRTT) or an inline transducer (IRTT) connected to an ACTA 4000 instrument.
Recommended oil for the pulse unit
Recommended oil for the pulse unit:
• SE2 Lubricant 45
• Other hydraulic oils can also be used if they have the following characteris-
tics: 22 cST/40ºC (ISO VG22). For example Mobil DTE-12M or Pennzoil
Pennzbell AW22.
A bottle of SE2 Lubricant 45 oil and the required syringe or syringes are order-
able as kits. Please see Service Kits for ordering numbers.
How to fill the pulse unit with oil
Method 1 (when using an ACTA and a Transducer):
This method is the fastest and will also give an optimized tool performance and
result in the longest filling intervals. Fill the pulse unit with oil in accordance
with the following instructions:
1. Position the pulse unit in a vice. Remove the oil plug positioned on either
the front or the back of the pulse unit. Add a small amount of oil to the
pulse unit.

Service instructions EN EP8PTX70 HR10-RE
16 © Atlas Copco Industrial Technique AB - 9836 950800 00
2. Assemble the tool and measure the pulse frequency, for more details
on measuring the pulse frequency see Static measurement with fixed
transducer.
• If the pulse unit frequency is in the specified range the amount of oil is
correct.
• If the pulse unit frequency is to low reduce some oil and measure the
pulse frequency again.
• If the pulse frequency is to high add some oil and measure the pulse
frequency again.
Model
Free speed
(r.p.m)
Pulse frequency
(Hz)
Max Torque
(minimum) (Nm)
EP 8 PTX HR10 6900 20 - 23 73
Method 2 (whitout an ACTA and Transducer):
This method is not as fast and accurate as using method 1. Fill the pulse unit
with oil in accordance with the following instructions:
1. Position the pulse unit in a vice. Remove the oil plug positioned on either
the front or the back of the pulse unit. Fill the pulse unit to 100% full. As-
semble the oil plug.

EP8PTX70 HR10-RE EN Service instructions
© Atlas Copco Industrial Technique AB - 9836 950800 00 17
2. Assemble the tool and run in reverse for 3-5 seconds.
3. Position the pulse unit in a vice. Remove the oil plug. Wait for all air bub-
bles to dissapear (approximatley 15 minutes) and the temperature to drop
down to 20 degrees.
4. Fill the pulse unit to 100% full.
5. Reduce the oil in the pulse unit with a specified volume according to table
using a 1 ml syringe. Assemble the oil plug.
Oil volume to be
reduced from 100%
Approx. oil volume
in pulse-unit
0.40 ± 0.05 ml 9 ml
6. Check torque and shut off function, for procedure see Testing/Measur-
ing.
• If everything is in order the amount of oil is right.
• If everything is not in order repeat from step one.

Service instructions EN EP8PTX70 HR10-RE
18 © Atlas Copco Industrial Technique AB - 9836 950800 00
Position of stop pin
The “X” measurement is correctly set at our factory before delivery. Normaly
the “X” measurement has to be adjusted only after that the parts concerned have
been dismantled. If the accuracy is not as good as expected, check the position
of the stop pin. The position of the stop pin is adjusted by turning the screw (see
fig. below).
To ensure that the adjustment screw not will change position during operation,
must the screw be sealed with "Loctite 290". Apply the "Loctite" before the ad-
justment is started.
The measurement “X” is hard to measure. It is possible to get the position by
starting from “X” = zero. Hold the pulse unit vertically and check that the stop
pin is covering a part of the centre hole (i.e. “X” is more than zero). Arrange the
shut off valve in the centre hole (see fig. below). Adjust the screw until the
valve drops down in the hole of the stop pin. In this position “X” is zero.
Place a gauge (i.e. a drill bit) with a diameter “D” according to table below in
the hole. Then unscrew the screw untill the gauge is just tight in the hole. Note:
the gauge must not be squeezed by the stop pin. Another way to get an appro-
priate “X” measurement is to unscrew the screw from the position “X” = zero.
Unscrew the No. of turns given in the table below. The measurements given in
the table will give a basic adjustment. Check the diameter “D” with a drill bit or
similar. An increased “X” means a higher tightening torque and a decreased
“X” means a lower tightening torque. It is possible to fine-adjust the tightening
torque by turning the screw. Change with an 1/8 of a turn at a time.
“D” “X”
No.of turns to unscrew to get
“X”
1.82 mm 1.2 mm 1.5

EP8PTX70 HR10-RE EN Service instructions
© Atlas Copco Industrial Technique AB - 9836 950800 00 19
Settings
Setting of tightening torque - Trim-/RE-versions
Free speed
A reduced free speed implies an improved accuracy and an increased number of
pulses peer tightening.
A reduced free speed may effect the torque level installed and the tightening
time.

Service instructions EN EP8PTX70 HR10-RE
20 © Atlas Copco Industrial Technique AB - 9836 950800 00
When the free speed has been reduced the number of pulses has increased as
well as the torque level. After a reduction of the free speed the torque level
might have to be reduced.
Type of joint (Hard or Soft)
The tightening time (i.e. the number of pulses per tightening) is depending on
joint hardness. Hard joints gives short and soft joint longer operation time, see
fig.
Max. recommended tightening time is 3 seconds.
Min. recommended number of pulses per tightening is 3.
An increased number of pulses per tightening implies an improved accuracy.
Fewer pulses per tightening implies an increased scatter
Operating area
Max. recommended tightening time is 3 seconds. Longer time indicates that the
joint is too soft for the machine used. If so it is recommended to choose a big-
ger size of machine or another type of nutrunner.
Min. recommended number of pulses per tightening is 3.Few pulses per tighten-
ing at a low setting indicates that the free speed ought to be reduced by the trim
valve.