Atlas Copco EP 19PTX450 HR20-RE User manual

EP 19PTX450 HR20-AT
Printed Matter No.9836 3094 00 Nutrunner
Publication Date 2019-05-10
Valid from Serial No. A9430001
Valid to Serial No. A1519999 Original Product instructions
EP 19PTX450 HR20-AT (225 - 450 Nm) 8431 0376 82
WARNING
To reduce risk of injury, everyone using, installing, repairing, main-
taining, changing accessories on, or working near this tool MUST
read and understand these instructions before performing any such
task.
DO NOT DISCARD - GIVE TO USER

2© Atlas Copco Industrial Technique AB - 9836 3094 00
Table of Contents
EN Original Product instructions ..................................................................................... 3
FR Instructions sur le produit d'origine.......................................................................... 14
DE Original-Produktanweisungen.................................................................................. 20
ES Instrucciones del producto original.......................................................................... 27
PT Instruções do produto original.................................................................................. 33
IT Istruzioni sul prodotto originale ............................................................................... 37
NL Oorspronkelijke productinstructies .......................................................................... 42
DA Original produktvejledning ...................................................................................... 47
NO Originale produktanvisninger................................................................................... 51
FI Alkuperäiset tuoteohjeet........................................................................................... 55
SV Ursprungliga produktanvisningar............................................................................. 60
RU Исходные инструкции по изделию....................................................................... 66
PL Oryginalne instrukcje produktu................................................................................ 71
CS Pokyny týkající se originálního produktu ................................................................ 76
HU Eredeti termékutasítások .......................................................................................... 85
ET Algupärased tootejuhised ......................................................................................... 90
LT Originalios gaminio instrukcijos .............................................................................. 94
LV Oriģinālās produktu instrukcijas .............................................................................. 99
ZH 原产品说明............................................................................................................ 103
JA 元の製品説明書.................................................................................................... 113
KO 원본 제품 지침...................................................................................................... 125

EP 19PTX450 HR20-AT Safety Information
© Atlas Copco Industrial Technique AB - 9836 3094 00 3
Notice
Many events in the operating environment may affect the
tightening process and shall require a validation of results. In
compliance with applicable standards and/or regulations, we
hereby require you to check the installed torque after any
event that can influence the tightening result. Examples of
such events include but are not limited to:
• initial installation of the tooling system
• change of part batch, bolt, screw batch, tool, software,
configuration or environment
• change of air- or electrical connections
• change in line ergonomics, process, quality procedures
or practices
• changing of operator
• any other change that influences the result of the tighten-
ing process
The check should:
• Ensure that the joint conditions have not changed due to
events of influence.
• Be done after initial installation, maintenance or repair
of the equipment.
• Occur at least once per shift or at another suitable fre-
quency.
Safety and operating instructions
Safety instructions
Warning
• Make sure you are familiar with the operating instruc-
tions before you use this machine.
• Before making any adjustments (e.g. setting the torque,
changing bits) disconnect the machine from the com-
pressed air line.
• The machine, together with any attachments and acces-
sories, must never be used for anything other than the
designed purpose.
• Use power sockets only. For safe and economic use - re-
place worn sockets.
• Check that the power socket is properly fastened - re-
place the square drive retainer when necessary.
• Keep your fingers away from the power socket during
operation to avoid injury.
• Never work without protective goggles.
• Avoid unnecessary idling.
• When using a suspension yoke, check that it is in good
condition and correctly fastened.
Warning
Disassembly and assembly precautions
The rotor blades (vanes) in the tool contains PTFE. The nor-
mal 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, SWEDEN declare that the product (with
name, type and serial number, see front page) is in conform-
ity with the following Directive(s):
2006/42/EC
Harmonised standards applied:
ISO 11148-6
Technical file available from:
Quality Manager, Atlas Copco Industrial Technique, Stock-
holm, Sweden
Stockholm, 1 July 2013
Tobias Hahn, Managing Director
Signature of issuer
Installation
Installation of vibrating tools
It is recommended that a minimum length of 300 mm of flex-
ible hose for compressed 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 maxi-
mum dew point of +10°C. We also recommend the in-
stallation 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/
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 connect-
ing.
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 follow-
ing formula:
L = Air consumption (litre/s)
D = Number of drops per min (1 drop = 15 mm3)
L* 0.2 = D

Safety Information EP 19PTX450 HR20-AT
4© Atlas Copco Industrial Technique AB - 9836 3094 00
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 cus-
tomer 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.
•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 installation, from the
tapping point to the tool, we offer you an installation pro-
posal.
For more information please read, Atlas Copco Industrial
Power Tools catalogue 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.
Use of a machine over recommended maximum torque might
result in improper function and faster wear.
Always check the setting and make referencense
setup on your actual joint.
see Service Instructions.
AutoTrim ventil
This machine is equipped with an AutoTrim valve, which
gives the machine optimal performance on mixed hard and
soft joints.
The AutoTrim valve is factory preset to suit a majory of ap-
plications. It gives a reduced speed during rundown. After
1-2 pulses it shifts automatically to full speed/power for the
rest of the tightening.
Regularly check the correct operation of the AutoTrim valve!
Non-switching (from restricted to open operation) will cause
longer tightening time with risk of over tightening of the
joint. Premature switching to open position (i.e. when tool is
running free) might cause erratic shut-off because too few
pulses.
For further information pls see - Service Instructions - Auto
Trim Valve.
Test method - Static or Dynamic
A static torque measurement is recommended for the Er-
goPulse 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". Ordering 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 improve the machine per-
formance. Alternatively consider an automatic lubricator de-
vice, Atlas Copco oil fog lubricator DIM, or single point lu-
bricator DOS, which will improve the machine performance.
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 necessary to refill the unit
between the regular overhaul intervals. The frequency of this
procedure depends on the type of application, number of cy-
cles, 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 tightening.
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 in-
structions.

EP 19PTX450 HR20-AT Safety Information
© Atlas Copco Industrial Technique AB - 9836 3094 00 5
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 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 should be replaced.
All o-rings should be greased before assembling; espe-
cially 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 replaced.
Lubrication
Lubricate specially gears, valve and clutch with grease con-
taining molybdenum disulphide (e.g. Molykote BR2 Plus).
Lubricate o-rings and threaded connections with grease be-
fore assembling.
Grease Guide ErgoPulse
Brand
General pur-
pose
Bearings Motor shaft
Air Lubrica-
tion
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
Brand
General pur-
pose
Bearings Motor shaft
Air Lubrica-
tion
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, acces-
sories, 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 ar-
eas for improvement in posture, component placement, or
work environment.
• Take frequent breaks and change work positions fre-
quently.
• 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 field 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 mini-
mize 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 flanges for cut-off wheels and avoid
bending the wheel during cut-off operation.
• When drilling:

Safety Information EP 19PTX450 HR20-AT
6© Atlas Copco Industrial Technique AB - 9836 3094 00
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.
Country of origin
Please refer to the information on the product label.
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.
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 accord-
ing 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 informa-
tion concerning:
- Safety instructions
- Installation, Operation and Service instructions
- Exploded views
ServAid facilitates the ordering process of spare parts, ser-
vice tools and accessories for the product of your choice. It is
continuously updated with information of new and re-
designed products.
You can use ServAid to present content in a specific lan-
guage, provided that translations are available, and to display
information about obsolete products. ServAid offers an ad-
vanced 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 repre-
sentative 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 in-
structions on the page.
Decommissioning
Recycling instruction
When a product has served its purpose it has to be recycled
properly. Dismantle the product and recycle the components
in accordance with local legislation.
Batteries shall be taken care of by your national battery re-
covery organization.
Technical data
Technical data
Noise and vibration emission
Noise (in accordance with
ISO15744) dBA
Sound pressure level 88
Sound power level 99
Uncertainty 3
Vibration total value, valid
from 2010
(3-axes value in accordance
with ISO28927-2) m/s2
Vibration value 8.2
Uncertainty 1
Noise and Vibration Declaration Statement
These declared values were obtained by laboratory type test-
ing in accordance with the stated standards and are suitable
for comparison with the declared values of other tools tested
in accordance with the same standards. These declared val-
ues are not adequate for use in risk assessments and values
measured in individual work places may be higher. The ac-
tual exposure values and risk of harm experienced by an indi-
vidual 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 consequences of using the declared values, in-
stead of values reflecting the actual exposure, in an individ-
ual risk assessment in a work place situation over which we
have no control.

EP 19PTX450 HR20-AT Safety Information
© Atlas Copco Industrial Technique AB - 9836 3094 00 7
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 accessing http://
www.pneurop.eu/index.php and selecting 'Tools' then 'Legis-
lation'.
We recommend a programme of health surveillance to detect
early symptoms which may relate to noise or vibration expo-
sure, so that management procedures can be modified to help
prevent future impairment.
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 required. Too long
tightening time, in combination with high production rate,
may also result in excessive heating of the oil. In that condi-
tion 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 ac-
ceptable 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 stan-
dard 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 ac-
ceptable results, a bigger 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 conse-
quences:
• 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 rec-
ommend a tool from the EP PTX-L series, designed for
low pressure installations.
Pressure regulators
We recommend using one pressure regulator for each
tool. Make sure to adjust the regulator to the lowest ex-
pected 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 following advantages:
• Clean air without water and particles resulting in reduced
tool wear and reduced risk of tool failure.
• Will help to maintain the power and speed of the air mo-
tor 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 cor-
rectly adjusted, so the switching to full power is produced af-
ter 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 disassem-
bly fast and easy with less risk of damaging parts in the
process.

Safety Information EP 19PTX450 HR20-AT
8© Atlas Copco Industrial Technique AB - 9836 3094 00
Correct tightening of parts is important to:
• Optimize performance of the tool.
• Minimize the risk of parts coming loose during opera-
tion.
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 maximum 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.
• 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 es-
tablished to achieve the correct clamping force and to pre-
vent 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 increased 10-20% and if nec-
essary some type of low or medium threadlocking fluid could
also be applied.
Example
Operating Instructions
Inspection and lubrication of pulse unit
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 be-
cause 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 fol-
lowing characteristics: 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 orderable as kits. Please see Service Kits for or-
dering numbers.

EP 19PTX450 HR20-AT Safety Information
© Atlas Copco Industrial Technique AB - 9836 3094 00 9
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.
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 fre-
quency (Hz)
Max
Torque
(minimum)
(Nm)
EP
19PTX450
HR20-AT
3000 9 - 12 475
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. Assemble the oil
plug.
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 bubbles to dissapear (approximatley 15
minutes) and the temperature to drop down to 20 de-
grees.
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
3.3 ± 0.05 ml 42 ml
6. Check torque and shut off function, for procedure
see Testing/Measuring.
• If everything is in order the amount of oil is right.
• If everything is not in order repeat from step one.
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 turn-
ing 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 adjustment 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 un-
til 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 appropriate
“X” measurement is to unscrew the screw from the position
“X” = zero. Unscrew the No. of turns given in the table be-
low. The measurements given in the table will give a basic
adjustment. Check the diameter “D” with a drill bit or simi-
lar. 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.

Safety Information EP 19PTX450 HR20-AT
10 © Atlas Copco Industrial Technique AB - 9836 3094 00
“D” “X”
No.of turns to un-
screw to get “X”
1.55 mm 1.5 mm 1.5
Settings
Setting of tightening torque - AutoTrim Valve
(AT)
AutoTrim Valve
The AutoTrim valve gives a reduced speed during rundown.
After 1-2 pulses on a joint it shifts automatically to full
speed/power for the rest of the tightening, as shown in illus-
tration below.
In most cases the factory settings give best performance.
Possible adjustments:
• Free speed (factory set to approx 70% of full speed).
• Switch point from reduced to full power (factory set to
1-2 pulses) for standard, non reporting (RE) applications.
• Power during pulsing (factory set to full power).
Adjustment of switch point
• 1. Remove the cover (1) with 22 mm wrench while hold-
ing the valve casing with hook wrench.
• 1. Remove the cover (1) with 22 mm wrench while hold-
ing the valve casing with hook wrench.
• 2. Adjuste valve (2) with 1.5 mm Allen key supplied
with AutoTrim valve. From fully closed (+) position to
normal operation the needle valve is opened between 6
and 8 turns (-) depending on tool size.
• 2. Adjuste valve (2) with 1.5 mm Allen key supplied
with AutoTrim valve. From fully closed (+) position to
normal operation the needle valve is opened between 6
and 8 turns (-) depending on tool size.
• 3. Restore cover (1).
• 3. Restore cover (1).
• 4. Perform a function control.
• 4. Perform a function control.
If the valve is too much closed, the AutoTrim valve will not
shift to open position when pulsing starts. If the valve is too
much open, the AutoTrim will directly open to full speed and
power.
Clockwise (+) rotation delays the switch point (closes the
needle valve) and vice versa.
If the tool is used for reporting applications (RE) the needle
valve has to be turned more open (-) to compensate for the
air volume in the signal hose. For parts needed for RE-conec-
tion see Optional accessories in Product Instructions or Ser-
vAid.