EP8XS HRX10
Nutrunner
Product Information
General Information
Safety Signal Words
The safety signal words Danger, Warning, Caution, and Notice have the following meanings:
DANGER | DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury. |
WARNING | WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury. |
CAUTION | CAUTION, used with the safety alert symbol, indicates a hazardous situation which, if not avoided, could result in minor or moderate injury. |
NOTICE | NOTICE is used to address practices not related to personal injury. |
Warranty
Product warranty will expire 12+1 months after dispatch from Atlas Copco's Distribution Center.
Normal wear and tear on parts is not included within the warranty.
Normal wear and tear is that which requires a part change or other adjustment/overhaul during standard tools maintenance typical for that period (expressed in time, operation hours or otherwise).
The product warranty relies on the correct use, maintenance, and repair of the tool and its component parts.
Damage to parts that occurs as a result of inadequate maintenance or performed by parties other than Atlas Copco or their Certified Service Partners during the warranty period is not covered by the warranty.
To avoid damage or destruction of tool parts, service the tool according to the recommended maintenance schedules and follow the correct instructions.
Warranty repairs are only performed in Atlas Copco workshops or by Certified Service Partners.
Atlas Copco offers extended warranty and state of the art preventive maintenance through its ToolCover contracts. For further information contact your local Service representative.
For electrical motors:
Warranty will only apply when the electric motor has not been opened.
Website
Information concerning our Products, Accessories, Spare Parts and Published Matters can be found on the Atlas Copco website.
Please visit: www.atlascopco.com.
ServAid
ServAid is a portal that is continuously updated and contains Technical Information, such as:
Regulatory and Safety Information
Technical Data
Installation, Operation and Service Instructions
Spare Parts Lists
Accessories
Dimensional Drawings
Please visit: https://servaid.atlascopco.com.
For further Technical Information, please contact your local Atlas Copco representative.
Safety Data Sheets MSDS/SDS
The Safety Data Sheets describe the chemical products sold by Atlas Copco.
Please consult the Atlas Copco website for more information www.atlascopco.com/sds.
Special Precaution
Check that the power socket is properly fastened.
Replace the square drive retainer or socket if worn.
Avoid unnecessary idling.
When using a suspension yoke, make sure that it is in good condition and correctly fastened.
Warning
Country of Origin
For the Country of Origin, please refer to the information on the product label.
Dimensional Drawings
Dimensional Drawings can be found either in the Dimensional Drawings Archive, or on ServAid.
Please visit: http://webbox.atlascopco.com/webbox/dimdrw or https://servaid.atlascopco.com.
Overview
Technical Product Data
Technical Product Data can be found on either ServAid, or the Atlas Copco website.
Please visit: https://servaid.atlascopco.com or www.atlascopco.com.
Installation
Installation Requirements
Air Quality
For optimum performance and maximum product life we recommend the use of compressed air with a maximum dew point of +10°C (50°F). We also recommend to install an Atlas Copco refrigeration type air dryer.
Use a separate air filter which removes solid particles larger than 30 microns and more than 90% of liquid water. Install the filter as close as possible to the product and prior to any other air preparation units to avoid pressure drop.

For impulse/impact tools make sure to use lubricators adjusted for these tools. Regular lubricators will add too much oil and therefore decrease the tool performance due to too much oil in the motor.

Make sure that the hose and couplings are clean and free from dust before connecting to the tool.

Both lubricated and lubrication free products will benefit from a small quantity of oil supplied from a lubricator.
Air Lubrication Guide
Recommended air lubricators:
Atlas Copco Optimizer (1 liter) 9090 0000 04
Q8 Chopin 46
Shell Air Tool Oil S2 A 320
Compressed Air Connection
For correct air pressure and hose size, see the Technical Product Data on - https://servaid.atlascopco.com or www.atlascopco.com.

Make sure that the hose and couplings are clean and free from dust before connecting to the tool.
Air Pressure Regulation
Make sure to adjust the regulator to the lowest expected pressure on the line.
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 five bar, a tool from the EP L-series (designed for low pressure installations) is recommended.
Installation Instructions
Installation of Vibrating Tools
We recommend using a minimum length of 300 mm (12") of flexible hose for compressed air between a vibrating tool and the quick coupling.
Initial Setting of Torque
To minimize the risk of damage to the actual joint we recommend to set the torque slightly lower on the test joint than the torque wanted for the application. Make sure to use the same equipment, such as for example extensions, sockets and air pressure on the test joint as will be used on the actual joint.

A | Torque transducer IRTT |
B | Test joint |
C | ST Analyzer |

Make sure to always verify the torque settings on your actual joint.
Operation
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 work 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 load. You can also reduce the load on the static muscles by holding the load 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.
Use ear protection equipment in noisy environments.
Use dust extraction system or mouth protection mask in dusty environments.
Operating Instructions
Torque Check - Residual Torque Measurement on Actual Joint
Make sure to use the same equipment, such as extensions, sockets and air pressure during the tightening, as will be used on the actual tightening application.
When performing a torque check on the actual joint we recommend using an ST Wrench with residual torque measurement* setting.
* Torque required to cause the threads of the fastener (including its head) on which torque is applied, to move relative to the mating thread.

A | The actual joint |
B | Torque wrench with monitoring |
Perform a tightening.
Measure the result with the Torque wrench with monitoring.
Optimizing the Tool Performance
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 it takes for the tool to reach target torque can be measured with an analyzer. The tightening time can also be used as a guide, to know if the tool is appropriate for your application:
≤ 1 second for tools up to 30 Nm
≈ 1 second for tools up to 80 Nm
≈ 2 seconds for tools up to 150 Nm
≈ 5 seconds for tools up to 450 Nm
≤ 10 seconds for tools up to 850 Nm
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 achieved 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 case the power will decrease with longer tightening time and sometimes no shut off.
If the target torque is achieved with less than 5 pulses this can be fixed by:
Decreasing the air pressure.
Reducing the speed by means of the AutoTrim or Trim valve.
If the above is not possible or does not give wanted results, a smaller tool may be a better choice.
If the target torque is achieved with more than 20 pulses this can be fixed by:
Increasing the dynamic air pressure to 6-7 bar for standard EP tools, or up to 5 bar for low pressure EP L-tools.
Adjust the AutoTrim or Trim valve to give maximum power/speed.
If the above is not possible or does not give wanted results, a bigger tool may be a better choice.

When changing the air pressure, the target torque must be measured again and adjusted if needed.
Setting of tightening torque

The adjusting screw is accessible through the hole in the housing. If necessary, turn the outgoing spindle.
After adjusting, it is important to remember to assemble the plug of the hole in the housing.
It is recommended to start at min. torque setting - when the adjustment screw is screwed out approx. 6 turns from the bottom position. Do not screw out any further.
When using the machine above recommended maximum torque it might result in improper function and faster wear. Always check the setting on your actual joint.

Position of reversing knob

Operating Instructions

Service
Maintenance Instructions
Service tools
Atlas Copco Service tools are designed to make assembly and disassembly fast and easy with less risk of damaging parts in the process.
When assembling the tool after service it is important to tighten the parts correctly 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 on ServAid.
Preventive Maintenance
Preventive maintenance is recommended once per year or after a maximum of 250.000 tightenings. 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.

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.
Lubrication Instructions
Rust Protection and Cleaning
Water in the compressed air can cause rust. To prevent rust we strongly recommend to install an air dryer.
Water and particles can cause sticking of vanes and valves. This can be prevented by installing an air filter close to the product to avoid pressure drop.
Before longer stand stills always protect your tool by adding a few drops of oil into the air inlet. Run the tool for 5–10 seconds and absorb any access oil at the air outlet in a cloth.
Lubrication Guide
Brand | General purpose, Bearings and Gears |
---|---|
BP | Energrease LS-EP2 |
Castrol | Optileb GR UF 1 |
Esso | Beacon EP2 |
Q8 | Rembrandt EP2 |
Mobil | Mobilegrease XHP 222 NLGI2 |
Klüber Lub. | Klübersynth UH 1 14-151 |
Texaco | Multifak EP2 |
Molykote | BR2 Plus |
Shell | Gadus S2 |
Brand | Pulse unit hexagon |
---|---|
Klüber Lub. | Microlube GL 261 |
To fill the pulse unit 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 cycles, tightening time etc. An indication of not enough oil is a decreased tightening torque and an increased pulse frequency.
After disassembly of pulse unit, fill with oil according to operation No. 1-3 below. Run the machine in a vice for 10 seconds according to operation No. 5 below. Then continue according to operation No. 6-11. For best performance use Atlas Copco pulse unit oil Bio. The Oil Filling Kit is composed of Atlas Copco Pulse unit oil Bio 150 ml and a syringe (1 ml). Ordering No. : 4081 0121 90. Other hydralic oils of the same type can also be used.

To refill the pulse unit
Keep the pulse unit at normal room temperature.

Before the refill: Let the bubbles in the oil fade away, at least 30 min. after last run. Check that there are no bubbles in the oil and that the pulse unit is completely full (100%) before reducing the oil volume according to operation No. 10.
Correct oil quantity: Fill to 100%, then reduce according to table. After the refill - check the tightening torque, and pulse frequency according to test methods. |
Oil volume to be reduced from 100% | Approx. oil volume in pulse-unit |
---|---|
0.45 ± 0.05 ml | 7.5 ml |

Dismantling/Assembling Instructions
Instructions for Vane Motors
Dismantling

Service tools are also included in the Basic Service Tools set. For further information see ordering No. 9835 5485 00
Dismantling tool Mandrel A
Ordering No. | Ø D | Ø C |
---|---|---|
4080 0182 01 | 7 | 3.5 |
4080 0182 02 | 8 | 4.5 |
4080 0182 03 | 9 | 5.5 |
4080 0182 04 | 10 | 6.5 |
4080 0182 05 | 13 | 8.5 |
4080 0182 06 | 16 | 10.5 |
4080 0182 07 | 19 | 12.5 |
4080 0182 08 | 22 | 15.5 |
4080 0182 09 | 24 | 17.5 |
4080 0182 10 | 26 | 20.5 |
4080 0182 11 | 30 | 25.5 |
4080 0182 12 | 35 | 30.5 |
4080 0182 13 | 40 | 35.5 |
4080 0182 14 | 47 | 40.5 |
Inspection of Motor Parts

Assembling - According to Bäckströms Method

Service tools are also included in the Basic Service Tools set. For further information see ordering No. 9835 5485 00
Dismantling tool Mandrel B
Ordering No. | Ø D | Ø C |
---|---|---|
4080 0567 04 | 12.5 | 5.2 |
4080 0567 11 | 14.5 | 6.5 |
4080 0567 01 | 15.5 | 5.2 |
4080 0567 05 | 18.5 | 6.2 |
4080 0567 02 | 18.5 | 8.2 |
4080 0567 06 | 21.5 | 7.5 |
4080 0567 03 | 21.5 | 8.2 |
4080 0567 07 | 25.5 | 10.5 |
4080 0567 08 | 27.5 | 12.5 |
4080 0567 09 | 31.5 | 15.5 |
4080 0567 10 | 34.5 | 18.5 |
Tightening of Threaded Connections
The tightening torque indicated in the exploded views (see Spare parts section in https://servaid.atlascopco.com) will give the right clamping force and prevent parts from loosening. It is important not to exceed the clamping force, these parts must be able to open up without being damaged at service. After some time of operation and in special circumstances, depending on application and usage, the parts may however loosen somewhat. The tightening torque can then be increased by 10-20% and some type of low or medium thread locking fluid can be applied.
Testing/measuring



Always verify the setting on your actual joint.
Always verify the dynamic measurement on your actual joint by a static check with a torque wrench (electronic).
Torque Check - Residual Torque Measurement on Actual Joint
Make sure to use the same equipment, such as extensions, sockets and air pressure during the tightening, as will be used on the actual tightening application.
When performing a torque check on the actual joint we recommend using an ST Wrench with residual torque measurement* setting.
* Torque required to cause the threads of the fastener (including its head) on which torque is applied, to move relative to the mating thread.

A | The actual joint |
B | Torque wrench with monitoring |
Perform a tightening.
Measure the result with the Torque wrench with monitoring.
Recycling
Environmental Regulations
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 recovery organization.