DOWNLOAD PDF Cat Electrohydraulic control unit, 6 functions Operating Manual

Translation of the original operating manual

Operating Manual Electrohydraulic control unit, 6 functions Doc. no.: 8154 180 000 BA 00

Caterpillar Global Mining Europe GmbH Industriestraße 1 Phone: +49 (0) 23 06 / 709 - 0 Email: info@cat.com D-44534 Lünen Fax: +49 (0) 23 06 / 709 - 1421 Web: www.mining.cat.com

Amendments and alterations to this publication are not subject to notification. Caterpillar reserves all rights to this publication.

Its content is protected by copyright laws. No part of this publication may be reproduced or transferred in any way or form without the prior written approval of Caterpillar.

Caterpillar declines any liability for direct or indirect consequences of printing errors.

We reserve the right to introduce modifications as a result of technical developments without previous notice.

Caterpillar Global Mining Europe GmbH, Lünen 2012E A Caterpillar Inc. Company

Table of content

Table of content 1. About this manual Before starting work . . . . . . . . . . . . . . . . . . . . . . . . . .

Persons for whom this operating manual is intended . . . . .

Purpose of this operating manual . . . . . . . . . . . . . . . . . . . . .

Characters and symbols used . . . . . . . . . . . . . . . . . . . . . . . .

1.3 1.3 1.3 1.4

2. Your safety Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation and maintenance . . . . . . . . . . . . . . . . . . . . . . . . .

Repair and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . .

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Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unauthorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 2.3 2.4

2.5 2.5 2.5

2.6

3. Storage and transport Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storing the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storing used equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transport boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dimensions and weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bracket with control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 3.3 3.4

3.5 3.5 3.5 3.5 3.5

4. Installation Requirements for the face hydraulic system . . . . .

4.3

Installation of the control unit . . . . . . . . . . . . . . . . . .

4.4

Removing the control unit . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation of the control unit . . . . . . . . . . . . . . . . . . . . . . . .

4.4 4.5

5. Operation Pilot valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing the pilot valve . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Filter cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing the filter cartridge . . . . . . . . . . . . . . . . . . . . . . . . .

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5.4 5.4 5.4 5.5

5.7 5.7 5.8

Table of content Accumulator cartridge . . . . . . . . . . . . . . . . . . . . . . . .

Replacing the accumulator cartridge . . . . . . . . . . . . . . . . . .

5.10 5.11

6. Technical Data 6.3 6.4 6.4 6.4 6.4 6.5 6.5 6.5

Hydraulic circuit diagram . . . . . . . . . . . . . . . . . . . . . .

6.7

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.8

Hydraulic connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Permissible media . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hydraulic fluids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Quality of the process water . . . . . . . . . . . . . . . . . . . . . . . . .

Lubricating greases and pastes . . . . . . . . . . . . . . . . . . . . . .

6.8

6.9 6.9 6.11 6.13

7. For your information Standards and guidelines . . . . . . . . . . . . . . . . . . . . .

Referenced standards and guidelines . . . . . . . . . . . . . . . . .

7.3 7.3

Electrohydraulic control - 6 functions

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Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Materials used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dimensions and weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.3

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Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

About this manual

Before starting work

About this manual This chapter contains important information that makes it easier for you to use this manual. It also provides you with information on the structure of the manual and the symbols used.

Before starting work use the correct manual

Using an operating manual that was not specifically written for the control unit concerned can result in a safety hazard for yourself and others. Ensure that the specifications on the control unit comply with the specifications in the operating manual.

This operating manual is designed for: Electrohydr. control unit - 6 functions Device number 8154 180 000 00 00

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and is only permitted to be used for control units of this type. Only use the operating manual which applies to the respective control unit. Failure to do so will pose a danger to yourself and others. availability of operating manual

It is absolutely necessary to ensure that all persons working with or on the control unit always have unrestricted access to the contents of the current, applicable operating manuals.

Persons for whom this operating manual is intended This operating manual is intended for everyone concerned with installing, servicing, repairing, operating and removal.

The supervisors who initiate the above work or supervise it must also follow this operating manual.

Purpose of this operating manual efficiency

This operating manual is intended to help you work economically and safely with our product. It contains important information on all the activities related to the control unit.

Read this operating manual completely and at your leisure. Pay special attention to the safety instructions.

Try to memorize the appearance and meaning of the safety and instruction symbols.

safety

Pay special attention to chapter 2, “Your safety”. This chapter contains important information indicating possible hazards.

operating costs guarantee

Observe this information and follow the instructions in this operating manual. This is the only way that you can keep the operating costs down and retain your rights to make a claim under the warranty.

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1.3

Before starting work Characters and symbols used The following characters and symbols are used for safety instructions and important information in this operating manual.

Try to memorize the symbols and their meanings.

Danger!

Points in the text marked with this symbol draw your attention to immediately impending danger. Possible consequences are very serious injury or even death.

Warning!

These points contain information on hazardous situations.

Possible consequences are very serious injury or even death.

Important!

Points in the text marked with this symbol contain useful tips and information intended to make work easier for you. They do not warn about harmful or dangerous situations.

Items in lists are marked with bullets.

– Points in sub-lists are marked with a long dash at the start of the line.

. Points in the text marked in this way describe individual work steps. Follow these instructions step-by-step. It will help you carry out your work faster and, more importantly, more safely.

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Notice!

Points in the text marked with this symbol draw attention to harmful situations. Possible consequences are minor damage to the machine or damage in the immediate vicinity.

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Caution!

This symbol draws attention to dangerous situations. Possible consequences are minor to moderately serious injuries and damage to the machine.

2

Your safety

Personnel

Your safety This chapter provides vital information for your safety.

Pay special attention to this chapter. The safety instructions and rules of procedure will help you to avoid hazardous situations and to perform the necessary work as safely as possible. residual risk

The control unit was manufactured in accordance with state of the art and generally recognized safety standards and regulations.

However, a residual risk still exists which may involve you getting into hazardous situations when working with or on the control unit.

These may, for example, be caused by unforeseeable external influences, machine damage or operating errors.

supplementary regulations

In addition to this operating manual, also be sure to observe the respective legal provisions and regulations for accident prevention in your country.

Observe the safety and accident prevention regulations: of the mining company,

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of the mines inspectorate and of the mining supervisory authorities

Personnel Persons employed in the operation, repair and overhaul of hydraulic and/or electrohydraulic control components must be specially qualified. In addition to having had training in mining technology the following minimum requirements must be met.

Operation and maintenance qualification

Operation and maintenance of the shield control system may only be performed by trained personnel.

The training must be specially tailored to the type of control unit actually being used.

The content of the operating manual, especially the chapter on safety, must constitute a part of this training.

They must possess and furnish proof of adequate familiarity with the mechanical system hydraulic system and control system.

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2.3

Personnel Repair and maintenance In general, repair work may only be performed by persons who have the knowledge and skills to meet the special requirements and have been adequately trained in the repair of the equipment.

Repair work on and overhaul of: control units, working valves, pilot valves, safety components such as pressure relief valves etc.

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shall be performed only Caterpillar service engineers or by specially trained personnel of the mining company.

2.4

Electrohydraulic control - 6 functions

Operating conditions Operating conditions Intended use The electrohydraulic control unit is exclusively constructed and manufactured as a component of the shield support control system.

It may only used in conjunction with an electronic control system, for example a PMC®-R control system.

Only use the control unit as intended.

The intended uses are as follows:

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The electrohydraulic control unit, together with an electronic control unit - for instance a PMC®-R control unit -, forms an electrohydraulic shield control system. This is used to control shield support functions. Together they are part of a neighboring control system for electrohydraulic shield supports and are intended for use in underground mining.

The electrohydraulic control unit is an essential part of the electrohydraulic shield control system. The functions may not be operated directly at the electrohydraulic control unit, but rather on the corresponding electronic control unit located in one of the neighboring supports. The pilot valves on the electrohydraulic control unit are activated manually or via a program using the control unit.

The electrohydraulic control unit is also used as a “control unit” in two types of exceptional cases: - emergency operation and - repair operation.

The individual functions of the shield support are actuated directly on the pilot valve of the electrohydraulic control unit. In justified exceptional cases and in strict compliance with the corresponding safety regulations of the mine operator, the functions of a support can also be actuated when the electronic control unit is blocked or it has failed.

Unauthorized use All use, which is not expressly declared as intended, is regarded as unauthorized use.

Unauthorized use includes: the use of the electrohydraulic control units as “control units” for the operation of support functions during normal shield unit operation.

Actuating the shields exclusively via the pilotvalves by pressing a button, is regarded as unintended use as it is not possible, which is not authorized, to control the shield from a neighboring shield.

Unauthorized use can endanger yourself and others. You might be killed or seriously injured.

You should thus only use the electrohydraulic control unit as intended.

Caterpillar will accept no responsibility for the consequences of unauthorized use.

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2.5

Safety instructions Safety instructions The following always applies: general

Always concentrate on your work.

It is also imperative that you follow the operating manual for the support and the control unit.

Always familiarize yourself with the working environment, before starting work.

Always keep out of any shield which is not set.

Always wear personal protective equipment.

Only use control units which are in a technically flawless condition.

EMERGENCY STOP

Press the EMERGENCY STOP switch immediately, in the event of faults or irregularities in operation. Notify your supervisor of any peculiarity, so that necessary action can be taken immediately.

support lock-out switch

If the shield is equipped with an electrohydraulic control unit, you must lock-out the shield by pressing the support lock-out switch (repair switch). This means the shield can not be controlled via the control unit.

Press the support lock-out switch when performing: maintenance work, inspection work, repair work and during prolonged presence in the shield.

moving parts

Never reach into or enter areas between machine components which can move. This applies especially to the: side seals, bases, relay bar assemblies, lemniscatic links, hydraulic props and cylinders, canopies and flippers.

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requirements

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Observe the acoustic and visual start-up warnings. Pay special attention to the start-up warnings for the conveyor and for the mining equipment.

Safety instructions Storage and transport Never store materials of any kind in the travel way or in your working area.

To avoid hindering or endangering the face crew, immediately remove any faulty components from the face.

Never store faulty parts with good parts. This way you can avoid inadvertent reinstallation of these faulty components somewhere else. Have these faulty components repaired.

Observe the specified storage periods and the storage instructions.

Installation Mechanically secure all moving parts before you depressurize the hydraulic system.

As a matter of principle, only work on depressurized hydraulic systems.

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Make sure that no dirt or impurities can get into the hydraulic system.

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Only remove the protective caps from the connectors immediately before installing the control unit.

Operation Only work in repair mode if it is absolutely necessary. If possible control the shields from the control unit of the neighboring shield.

Check to determine whether all protective devices on the shield are present and functional.

Make sure that no one is in the area of the shield being actuated.

Watch the shield's range of motion so that potential hazards can be recognized in time and preventative action can be taken.

Maintenance Inform the supervisory personnel and the face crew about maintenance and repair work. Provide them with information on the intended work and its probable duration.

Keep your working area clear to avoid danger to yourself and other persons.

Block off the working area for the mining equipment or stop the mining equipment and the conveyor and lock the system, to prevent it from being turned on again.

Before performing work, mechanically secure the shield to prevent it from accidentally sinking into the floor, e.g. by: propping up or supporting the canopy, placing wooden wedges between the lemniscatic links.

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2.7

Safety instructions Immediately discontinue any work on the shield, if conveying and mining operations are in progress in your working area.

Immediately after completing work, refit any removed protective devices and check that they work properly.

Make sure that the prescribed maintenance and inspection intervals are observed. Also see chapter 5, “Operation”. original parts

Use only spare parts which conform to the specified technical requirements. This is best ensured by using original Caterpillar spare parts.

Please refer to the spare parts folder for the order numbers.

Do not make any modifications or changes. Modifications and changes must be approved by Caterpillar.

Never use the control unit without a filter cartridge. If the filter is missing or if it is not fine enough, this can lead to malfunctions and damage to the control unit.

Avoid direct contact between your skin and hydraulic fluids.

Hydraulic fluid which penetrates the skin can cause serious infections.

Never use hydraulic fluids for rinsing or cleaning. Hydraulic fluids pose a very serious danger to health.

maintenance, repair

Only persons who have and can demonstrate special knowledge of hydraulics are allowed to work on the hydraulic system.

Carry out a visual inspection of all the hydraulic components at regular intervals. In particular check that: The hoses are not pinched.

The hoses have no bubbles or blisters.

The hoses or the outer sheaths of the hoses are not abnormallyrigid or hard.

The outer sheath of the hose is not damaged.

The connectors are firmly inserted in the coupling sockets.

The connections are leak-tight.

Ensure that no dirt enters the hydraulics system during repair work.

Dirt in the hydraulic system can cause serious damage to the whole system. Flush out the hydraulic lines thoroughly before connecting.

Before removing staples to disconnect hydraulic hoses turn the hose at the connector to check whether the line is pressurized.

If the hose is difficult to turn or does not turn at all the line is still pressurized. Make sure the line is depressurized.

If staples cannot be pulled out or can only be pulled out with difficulty, the hydraulic line might still be under pressure. Make sure the line is depressurized.

Secure the connectors of the hydraulic elements with the proper staples only. Always fasten the staples completely with both sides.

Never use nails, wire or similar materials.

After finishing repair work, check all connectors and connections for leaks before pressurizing the system again.

2.8

Electrohydraulic control - 6 functions

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handling hydraulic fluids

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Hydraulic system

Safety instructions permissible hoses

Use only hydraulic hoses approved for the prevailing pressures.

Do not use any hydraulic hoses with damaged connectors or worn O-rings.

Replace hydraulic hoses only with hoses of the same or a higher quality.

Observe the date of manufacture stamped on the hose fittings of the hose lines. Never use hydraulic hoses which are more than 2 years old, even if they have no visible signs of damage.

Fig. 1:

1

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Example: hose line, identification

2

3

1 manufacturer 2 calendar week

4 3 year 4 max. working pressure

Never try to hold a hydraulic hose line that is thrashing about. Immediately depressurize the section in concern.

Never try to repair damaged hydraulic hoses.

Replace hydraulic hose lines at the first suspicion of damage. installing hydraulic hose lines

Fit the hydraulic hose lines properly behind the brackets and clips provided for them.

Always install hydraulic hose lines so that they: always have a little slack, Fig. 2:

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Installing hydraulic hose line, slack

2.9

Safety instructions are not twisted, Fig. 3:

Installing a hydraulic hose line, twisted

Installing hydraulic hose line, bending

1,5 x d

d

cannot chafe, Fig. 5:

Installing hydraulic hose line, crossing

are not kinked, do not have to withstand tensile loads, are protected against thermal radiation, are accessible at all times.

Only push hydraulic hose lines into the sockets by hand. Never try to drive the hydraulic hose lines in with a tool as this will damage the connectors.

2.10

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Fig. 4:

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are not bent directly behind the connections (distance min.

1.5 x nominal diameter),

Safety instructions When installing the hydraulic hose lines, make sure they cannot be: torn out, kinked, crushed, driven over or twisted by the movement of the equipment (Fig.: 6).

Installing hydraulic hose line, connections on moving parts

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Fig. 6:

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2.11

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Safety instructions

2.12

Electrohydraulic control - 6 functions

3

Storage and transport

Storage

Storage and transport This chapter contains important information about the correct storage and transport of the electrohydraulic control unit.

Following the instructions and tips will increase the life cycle and service life of the electrohydraulic control unit. You will be able to carry out transport work more safely and quickly.

Paying careful attention to the points in this chapter will also help you to simplify your day-to-day work.

Storage Storing the equipment

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anticorrosion protection

Components with a temporary anticorrosion coating are protected for about six months.

avoid direct exposure to sunlight

Protect the equipment from direct exposure to sunlight.

Only store the electrical equipment, electronic components, replacement parts made out of rubber or plastic such as seals and hoses as well as hydraulic fluids in closed rooms at 15 C to 25 C.

moisture and dirt

Protect all parts of the equipment stored outdoors against moisture and dirt, e.g., using tarpaulins.

The mounting surfaces of hydraulic components must be protected against corrosion and sealed with blind plates. Protect the hydraulic plug-type connections and the connectors of the electrical cables with the caps and plugs supplied.

short-term storage

During short-term storage (approx. 4 weeks) of equipment outdoors, but at temperatures above freezing, electrical components need not be removed. Such components must be particularly protected against excessive temperatures, dirt and moisture.

long-term storage

During long-term storage (more than 4 weeks), the equipment must not be stored outdoors. It needs to be stored in a dry, well-ventilated room.

After a storage period of approximately two years, a random sample inspection must be performed to determine whether the measures taken and the method of storage have prevented damage.

This inspection can be carried out by Caterpillar upon request.

natural aging

Even with proper storage, seals and hose lines are subject to natural aging. Do not use these components if they have been stored for more than two years.

Important!

Ensure during storage that any new supplies are stored separately from existing stocks in such a way that on removal, old stocks are always taken first.

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3.3

Storage Storing used equipment The points listed above, with the exception of the one concerning anticorrosion protection, can be applied analogously for the storage of hydraulic components that have already been in use.

If the hydraulics system is to be put out of operation temporarily, the entire hydraulics system must be thoroughly flushed out in advance and then filled with a suitable anticorrosive and antifreeze liquid (e.g. HYDROCOR® CV50*). If this is not done, then the hydraulics components may suffer considerable damage within a short time, because the properties of the medium used can undergo very rapid, very negative changes, e.g. due to microbial infestation.

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anticorrosion protection

*

3.4

HYDROCOR® CV50 is a commercial trademark used by Theunissen Chemische Fabriken GmbH, Wuppertal, Germany

Electrohydraulic control - 6 functions

Transport Transport Transport boxes The control units are packed in several transport boxes. They should stay in these boxes until they reach their final operating location. This protects them from external damage.

Make sure that the boxes are not damaged during transport. During transport, make sure that they are not: dropped or broken open.

Protect the transport boxes from moisture. avoid frost damage

Before transporting the equipment at temperatures below freezing, all of the hydraulic components must be completely emptied and then completely filled with a corrosion inhibitor (e.g. HYDROCOR® CV50).

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If, during transport, the control unit is exposed to temperatures below -20 C, then special measures may have to be taken. In this case, before starting transport, contact Caterpillar's service department to clarify the necessary measures.

Dimensions and weight Depth: . . . . . . . . . . . . . . . . . . .

Width: . . . . . . . . . . . . . . . . . . .

Height: . . . . . . . . . . . . . . . . . . .

Weight: . . . . . . . . . . . . . . . . . .

255,25 mm 252 mm 145 mm 34.5 kg

Plugs The connectors for the individual control units are closed off with plastic plugs. This protects them from moisture, dirt and damage.

Notice!

Impurities in the hydraulic system can lead to the failure of the entire system, making expensive repairs necessary.

For this reason, you should only remove the plugs just before the control unit is connected.

Bracket with control unit Important!

When transporting the shield ensure that the bracket is fixed to the control unit such that it cannot collide with other components when shield is being retracted.

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3.5

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Transport

3.6

Electrohydraulic control - 6 functions

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Installation

Requirements for the face hydraulic system

Installation This chapter contains information on the installation and deinstallation of electrohydraulic control units. Please pay special attention to the warnings and tips.

Warning!

Improper or faulty installation can endanger yourself and others.

You may only carry out the installation if you can demonstrate that you have the requisite, special knowledge.

Requirements for the face hydraulic system

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Notice!

The hydraulic and electronic parts of the shield control system are dealt with in separate operating manuals.

You will find details on the commissioning and use of the shield control system in the operating manual on the electronic controls.

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The hydraulic medium must meet the following conditions for all hydraulic system components included in the Caterpillar scope of delivery: If the test specified in EWN 8350, part 1, is successful, the hydraulic fluid will be classified as suitable. See the section “Operating media” in chapter 6 of this operating manual Contamination Class 18/14 pursuant to ISO 4406.

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4.3

Installation of the control unit Installation of the control unit Removing the control unit Before you can start with the installation or exchange of the control unit, you must take safety precautions: safety

. Seal off your working area to keep all other personnel out. . Have mining stopped in this area. . Inform your colleagues about the nature and duration of the repair work and about your exact location.

. Press the support lock-out switch. . Secure the shield to stop it sinking by itself; e.g. by using wedges in the lemniscatic links or by propping up or supporting the canopy.

. Check that the hydraulic lines are really depressurized. removing control unit

If everything is OK so far, then you can continue with the next step.

. Label the connecting cables and hydraulic hoses to avoid mixups later on.

. Pull off the connecting cable from the cover of the pilot valve.

Danger!

Never work on a hydraulic line, if you are not sure that the line is completely depressurized.

If loose hydraulic hoses are thrashing about and hydraulic fluid is escaping under pressure, you could be seriously injured or even killed.

It is thus vital that you depressurize hydraulic components before you start to dismantle them.

If a staple can't be pulled out, or is very stiff, then you should be very careful. It is possible that the hydraulic line is still under pressure.

. Undo all of the hydraulic connections on the rear side of the control unit and make sure that the connections are not damaged or soiled when doing this.

. Secure the control unit with lifting gear and transport straps.

Notice!

Do not secure the control unit with chains or steel cables. It could be damaged by that.

Only use transport straps which sit closely on the control unit and which prevent it from slipping through.

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. Depressurize the hydraulic system of the shield concerned.

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switch hydraulic pressure off

Installation of the control unit . Undo the screws on the control unit mounting. . Pull the control unit out of the mounting.

Installation of the control unit

. Place the control unit in the mounting and tighten the screws (M10) by hand.

Fig. 7:

Tapped holes M10

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M10

M10

Important!

Before commissioning the shield, ensure that the symbol bar is positioned such that the symbols are clearly legible.

Caution!

Before the hydraulic connections are joined with one another, the coupling sockets and nipples of the plug-O connections must be treated with the molybdenum disulfide-free B3 lubricating paste in accordance with EWN 7068.

See chapter 6, Section “Lubricating greases and pastes”.

. Connect the hydraulic hoses. Ensure that you do not mix up the connections.

Follow the hose plan and the labeling of the hoses.

Danger!

You could be seriously injured or even killed by a hydraulic hose that is thrashing about!

Only use the correct size of staple to secure connector sockets. Push the staples on completely, using both sides of the staple. Never use nails, wire or similar materials.

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4.5

Installation of the control unit safety

. Check the hose connections again. The hose nipples must be firmly seated in the connector and must be locked in place with a staple. Both arms of the staple must fit in the connector.

Ensure that the connections don't leak.

. After you have connected and checked the hoses, plug in the connecting cable from the electrohydraulic control unit into the connecting sockets on the pilot valves. Follow the circuit diagram and the labeling of the cables.

. Check all of the connections again using the hydraulic diagram. . Test all of the shield functions and remove all of the safety measures used to carry out the work.

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Warning!

Only release the shield for use once you have checked that it works properly and did not find any malfunctions.

4.6

Electrohydraulic control - 6 functions

5

Operation

Operation This chapter provides you with information on the operation of the electrohydraulic control unit. It is also imperative that you follow the operating manuals for the support and the control unit.

Danger!

Risk of injury due to shield movements.

People can be badly injured or even killed by an unexpected shield movement, if the controls are operated by someone who does not have all of the necessary knowledge.

Only operate the controls on the control unit if you possess the necessary knowledge.

Fig. 8:

Electrohydraulic control unit, 6-functions 1

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9

10

5

15

3, 7

4, 8 2

1 manifold block 2 double 3/2 way solenoid valve 3 control valve cartridge NG 20 4 control valve cartridge NG 13 5 check valve NG2 * 6 filter cartridge

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6 A

7 screw fitting 8 screw fitting 9 plug M 16x1 10 plug M 18x1 15 type plate

5.3

Pilot valve Pilot valve Controlling the shields during repair operation is especially dangerous since you are then operating the shield directly and immediately under which you are standing. It is therefore extremely important that you know and understand the interrelationships between the functions and movements of the shield control system.

When actuating the shield using repair mode, no other persons may stand in the shield's area of movement.

Operation There are two pushbuttons on the cover of each pilot valve. If you push one of these buttons, the corresponding valve is immediately operated.

As soon as you release the button, the function is ended.

Fig. 9:

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Danger!

Jammed buttons can cause uncontrolled shield movements.

This could seriously injure or kill you.

Never lock the buttons in position.

Pushbutton

Function variable functions

5.4

The function of each pilot valve is variable and depends on the external circuitry of the control unit. A symbol strip shows the function of the buttons. The symbol strip is mounted near the control unit.

Electrohydraulic control - 6 functions

Pilot valve Replacing the pilot valve Preparatory work

. Mechanically secure the shield against involuntary lowering.

Warning!

The pilot valve is permanently pressurized. You could be seriously injured or even killed by pressurized components and escaping hydraulic fluid. Before starting work you must thus be absolutely certain that the hydraulic system is depressurized.

. Close the shut-off valve in the shield hydraulics pressure supply line.

. Alternately operate both manuel pushbuttons of each pilot valve ten times, to reduce the pressure in the shield hydraulic system.

. Check if there is any residual pressure in the control unit. ConCaterpillar Global Mining Europe GmbH, Lünen 2012

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sider the hydraulic lines and the hydraulic circuit diagram when doing this.

If the shield hydraulics is depressurized, then you can continue with the next step.

Removing the pilot valve Caution!

Contamination in the hydraulic fluid can cause serious damage to the whole system!

You should thus always ensure that your working area is clean.

. Clean dust and other loose debris from the immediate vicinity of the control unit, so that no contaminants get into the hydraulic system during the removal / installation of the pilot valve.

. Unscrew two hex. head screws (a). . Pull the pilot valve (b) forwards out of the control unit.

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Pilot valve Fig. 10:

Exchanging the pilot valve

a

b pilot valve

Installing the pilot valve The new pilot valve is installed in the reverse sequence to the removal of the old one.

Before installing, treat the contact surfaces with a separating/lubricating agent (B6 to EWN 7068), see also chapter 6, the section “Lubricating greases and pastes”.

If you have checked the hydraulic circuit and found no faults, then you can reapply pressure to the control unit.

5.6

Electrohydraulic control - 6 functions

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a hex. head screw M 6X20-A 4-80

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b

a

Filter cartridge Filter cartridge A filter cartridge is located in the distributor block of the control unit.

It protects the control unit's valves from damage caused by impurities in the hydraulic fluid.

Maintenance intervals Important!

The recommended maintenance intervals are for guidance only. Particular operating conditions may require other maintenance intervals. Be sure to modify the maintenance intervals to the specific operating conditions. after startup

After working on a hydraulic system, you can assume that dirt has gotten into the hydraulic system. Depending on the degree of contamination, this can cause the filters in the system to block up. As a result, functions are slowed down, performed incorrectly, or not performed at all.

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Filter cartridges on electrohydraulic shield control system must be replaced immediately after commissioning or restart (e.g. after changing to another face or working on the hydraulic system).

according to a schedule

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If problems occur in the preparation of the hydraulic medium, there will be an increased risk of failures due to clogged filters. Measures which have to be carried out regularly may become necessary to ensure reliable and safe operation. If necessary, the filter cartridges should be replaced at regular intervals, as a precaution.

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5.7

Filter cartridge Replacing the filter cartridge Caution!

Only use each filter cartridge once and do not attempt to clean it.

Contamination in hydraulic systems is a common reason for expensive repairs.

You must always only use new filter cartridges and seals.

Preparatory work

. Mechanically secure the shield against involuntary lowering.

Warning!

The filter cartridge is permanently pressurized. You could be seriously injured or even killed by pressurized components and escaping hydraulic fluid. Before starting work you must thus be absolutely certain that the hydraulic system is depressurized.

valve ten times, to reduce the pressure in the shield hydraulic system.

. Check if there is any residual pressure in the control unit. Consider the hydraulic lines and the hydraulic circuit diagram when doing this.

If the hydraulic circuit is depressurized, then you can continue with the next step.

5.8

Electrohydraulic control - 6 functions

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. Alternately operate both manuel pushbuttons of each pilot

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. Close the shut-off valve in the shield hydraulics.

Filter cartridge Removing the filter cartridge

. Remove dust and other contaminants from the control unit.

Caution!

Contamination in the hydraulic system can cause serious damage to the whole system!

Always ensure that your working area is clean.

. Unscrew the filter cartridge using a screwdriver.

Unscrewing the filter cartridge

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Fig. 11:

Important!

The filter cartridge has been soiled by residual emulsion and deposits.

Make sure that you dispose of the filter cartridge in an environmentally acceptable way!

Screwing in a new filter cartridge

. Screw the new filter cartridge in. . Hand-tighten the cartridge (15 Nm). . Check whether this connection leaks.

If you have checked the hydraulic circuit and found no faults, then you can reapply pressure to the control unit. Only remove the security measures which you introduced to carry out the work when you are sure that the hydraulics are working perfectly.

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Accumulator cartridge Accumulator cartridge The accumulator cartridge is used to stabilize hydraulic control circuits. It is charged with nitrogen and is connected directly with the system pressure of the control circuit.

In the case of a drop in pressure within the control circuit, fluid will be supplied by the accumulator cartridge and the control pressure will be stabilized.

Warning!

Do not operate the control block without an accumulator cartridge or with a damaged accumulator cartridge. Otherwise malfunctions of the control block and/or the shield may result. You could be seriously injured or killed by this.

Immediately replace a faulty accumulator cartridge.

Accumulator cartridges must be checked, at regular intervals, for proper functioning: 20 % of the accumulator cartridges spot-checked annually and all accumulator cartridges every two years.

To do this, the selected units have to be replaced by new accumulator cartridges and they can then be tested. The tested units can be put back if no faults were found.

The accumulator cartridge is located on the front side of the distributor block, see the following Fig. 12.

Fig. 12:

Accumulator cartridge, arrangement

a

a accumulator cartridge

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Important!

Accumulator cartridges may only be tested and filled by specialist Caterpillar personnel. Contact your local Caterpillar supplier.

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Important!

Accumulator cartridges are not supplied with the control block.

Please take account of this when ordering the spare parts that you need.

Accumulator cartridge Replacing the accumulator cartridge Preparatory work

. Mechanically secure the shield against involuntary lowering.

Warning!

The accumulator cartridge is permanently pressurized. You could be seriously injured or even killed by pressurized components and escaping hydraulic fluid. Before starting work you must thus be absolutely certain that the hydraulic system is depressurized.

. Close the shut-off valve in the shield hydraulics pressure supply line.

. Alternately operate both manuel pushbuttons of each pilot valve ten times, to reduce the pressure in the shield hydraulic system.

. Check if there is any residual pressure in the control unit. ConCaterpillar Global Mining Europe GmbH, Lünen 2012

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sider the hydraulic lines and the hydraulic circuit diagram when doing this.

If the shield hydraulic circuit is depressurized, then you can continue with the next step.

Removing the accumulator cartridge Caution!

Contamination in the hydraulic fluid can cause serious damage to the whole system!

You should thus always ensure that your working area is clean.

. Clean dust and other loose debris from the immediate vicinity of the accumulator cartridge on the control block, so that no contaminants get into the hydraulic system during the removal / installation of the accumulator cartridge.

Warning!

If staples cannot be pulled out or can only be pulled out with difficulty, the hydraulic line might still be under pressure. Make sure the line is depressurized.

. Pull out the staple (a) downwards. . Pull the accumulator cartridge (b) forwards out of the socket.

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Accumulator cartridge Fig. 13:

Exchanging the accumulator cartridge

c

a

b d c screw-in socket d red-plug in-L-socket DN20SS/10

. Pull the red-plug in-L-socket (d) forwards out of the socket.

Fig. 14:

Exchanging the accumulator cartridge

c

a a staple b accumulator cartridge

b d c screw-in socket d red-plug in-L-socket DN20SS/10

Installing the accumulator cartridge The new accumulator cartridge is installed in the reverse sequence to the removal of the old one. Before installing, treat the contact surfaces with a separating/lubricating agent (B6 to EWN 7068), see also chapter 6, the section “Lubricating greases and pastes”.

If you have checked the hydraulic circuit and found no faults, then you can reapply pressure to the control unit.

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a staple b accumulator cartridge

6

Technical data

Description

Technical Data This chapter contains important and useful information about the type of construction of the control unit and the materials used. At the end of this chapter, you will find information about permissible hydraulic fluids and recommendations on lubricants.

Important!

Please refer to the corresponding spare parts catalog for the details necessary to order spare parts.

Description Functions Using the electrohydraulic control unit, 6 functions can be controlled independently from one another. The control unit's working valves are driven via electromagnetic pilot valves. An electronic control unit is required to control the pilot valves, for example a PMC®-R, type control unit.

Control block, front view

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Fig. 15:

a b a connector (DN 20) for accumulator cartridge b distributor block

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c c pilot valve

6.3

Description Design The main parts of the electrohydraulic control unit are: Distributor block with – working valves, – check valve, – filter cartridge, – connection for accumulator cartridge and – connection socket, Pilot valves.

Fig. 16:

Electrohydraulic control unit

c b

e

d

a connection sockets on the rear side b distributor block c pilot valve

d pushbutton e connecting sockets for control unit

Materials used The control unit is made of corrosion resistant materials such as stainless steel, brass, bronze, etc.

The seal materials are designed for operation with HFA hydraulic fluids (oil in water emulsions).

Dimensions and weight Depth: . . . . . . . . . . . . . . . . . . .

Width: . . . . . . . . . . . . . . . . . . .

Height: . . . . . . . . . . . . . . . . . . .

Weight: . . . . . . . . . . . . . . . . . .

255,25 mm 252 mm 145 mm 34.5 kg

Pressures Permissible working pressure: . . . . . . . . . . . . . . . . . 350 bar Test pressure: . . . . . . . . . . . . 400 bar

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a

Description Filter The filter cartridge protects the pilot control circuit from contamination. Only use new cartridges. Do not use any “cleaned” filter cartridges.

Only with new filter cartridges are the required filter characteristics guaranteed (fineness = 25 m).

See also chapter 5, section “Changing the filter cartridge”

Mounting There are 4 tapped holes (M 10) located on the upper side of the distributor block of the control unit and 2 holes (M 10) each on each side.

Fig. 17:

Tapped holes M10

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M10

M10

Valves Working valves: 1 x 3/2 directional control valves (NG 20) 5 x 3/2 directional control valves (NG 13) They are actuated via pilot valves.

Pilot valves: 3 x double 3/2 directional control valves (NG 0.5) The pilot valves are driven by a control unit (e.g. PMC®-R). In an emergency, or for repairs, they can also be operated directly. For this, two pushbuttons are fitted in the valve cover.

The power supply to the pilot valve comes from the electronic control unit. In the housing cover of each pilot valve there are 4 contacts, which serve to attach a suitable connecting cable.

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Description Double 3/2 directional control valve parameters Classification according to guidelines 94/9/EC (ATEX): . . . . . . . . . . . . . . . . . . .

Protection class: . . . . . . . . . . . . . . . . . . . .

Connector type: . . . . . . . . . . . . . . . . . . . .

Type of magnet: . . . . . . . . . . . . . . . . . . . .

Nominal voltage: . . . . . . . . . . . . . . . . . . .

Perm. variation: . . . . . . . . . . . . . . . . . . . .

Switching current: . . . . . . . . . . . . . . . . . .

Lowest current: . . . . . . . . . . . . . . . . . . . . .

Group I, category M2 EExib l OS4 Electromagnet, around 57 Ohm Type: DMA3 12 V, DC -2%/+10% approximately 190 mA at most, down to 40 mA

Warning!

As soon as the current falls to a level below 40 mA, the switch settings will become unstable. This can lead to malfunctions or to the failure of the control unit.

6.6

Approval authority

Approval no.

Europe

INERIS, ATEX

05 ATEX 0049

USA

MSHA

18-ISA050002-0

Australia

Testsafe, ANZEx

05.4015X

Electrohydraulic control - 6 functions

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Apply in

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Tab. 1: Mining approvals

Hydraulic circuit diagram Hydraulic circuit diagram Fig. 18:

Electrohydraulic control unit, 6 functions

X6 6 X5 5 X4

6

4 X3 3

5

X2 2

X1

4

1 X2 3 2 P T

1

SP

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2

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Connections Connections The connections for the hydraulic lines are on the rear side of the control unit.

Fig. 19:

Control block

1 3

5 6

4

P 2 T

Hydraulic connections consumer of large quantities

Connections: . . . . . . . . . . . . 2 x DN 20, socket, Steck-0 Identification: . . . . . . . . . . . . 1, SP (accumulator cartridge connector, front side) Flow rate: . . . . . . . . . . . . . . . max. 340 l/min at p = 100 bar Use: . . . . . . . . . . . . . . . . . . . . consumer of large quantities

6.8

consumer of medium quantities

Connections: . . . . . . . . . . . . 3 x DN 12 and 2 x DN 10, socket, Steck-0 Identification: . . . . . . . . . . . . DN 12: 2, 3, 4 DN 10: 5, 6 Flow rate: . . . . . . . . . . . . . . . max. 180 l/min at p = 100 bar Use: . . . . . . . . . . . . . . . . . . . . consumer of medium quantities

connections for pressure feed and return

Connections: . . . . . . . . . . . . 2 x DN 25 socket, Steck-0 Identification: . . . . . . . . . . . . P (pressure feed ) T (tank line) Flow rate: . . . . . . . . . . . . . . . max. 340 l/min at p = 100 bar Use: . . . . . . . . . . . . . . . . . . . . Pressure feed into the system or return line to the tank

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SP

Permissible media Permissible media Hydraulic fluids Permissible hydraulic fluids Notice!

Use only hydraulic fluids for which you have a valid certificate issued by Caterpillar. Otherwise, there is a danger that the hydraulic equipment can be seriously damaged and could result in the loss of warranty claims.

In general, to operate hydraulic components from Caterpillar, only such hydraulic fluids are allowed to be used for which the respective operator has a valid certificate in accordance with EWN 8350 or an exemption permit from Caterpillar. Caterpillar will not accept any claims under warranty for components which have been or are operated using a different hydraulic fluid.

In addition, national - and sometimes also regional - regulations on health and safety at work and any environmental regulations must be observed for operation.

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If a mine only uses individual hydraulic components without using shield supports, or if obtaining a valid certificate would require too much effort, the same hydraulic fluid which is used for the existing shield support may be used for these individual components, subject to approval by Caterpillar. The same applies, e.g. to hydraulic chain tensioners, hydraulically tensionable drive units, etc. The respective exemption permit will be issued by Caterpillar on request.

Suitability test Before Caterpillar will issue a certificate for a hydraulic fluid, the respective fluid has to be subjected to a suitability test. However, this suitability test only refers to the technological properties of the hydraulic fluid, and does not allow any conclusions to be drawn with respect to its properties regarding health and safety and environmental protection.

To perform the suitability test, original samples are required of the concentrate and the water which will be used later when preparing the hydraulic fluid at the mine.

The suitability test will be carried out by an independent testing institute authorized by Caterpillar. The criteria as specified in EWN 8350 will be applied for the test. The suitability test mainly serves to clarify the properties of the hydraulic fluid with respect to the following: Stability.

Sealing materials.

Corrosion.

In addition, if required, a chemical “fingerprint” of the concentrate will be prepared in order to exclude or prove any possible changes in the composition of the concentrate.

If the suitability test shows that the hydraulic fluid meets requirements, the operator will receive a corresponding certificate from Caterpillar.

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Permissible media Certificate The customer will be given a certificate attesting the suitability of the hydraulic fluid for the operation of Caterpillar hydraulic systems for each product tested. Certificates shall be valid for a period of one year and, after a simplified test, can each be extended for an additional year. The certificate will no longer be valid if one or several of the requirements for obtaining the certificate are no longer fulfilled. This is the case, for example, if the quality of the water has changed substantially and/or the composition of the concentrate has been changed, a different concentrate is used or the concentrate and water mixture ratio does not correspond to the data given on the certificate. For further information, please refer to EWN 8350, part 1.

The following illustration shows a typical certificate.

Typical certificate

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Fig. 20:

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Electrohydraulic control - 6 functions

Permissible media Hydraulic fluid maintenance The consistent good quality of the hydraulic fluid is essential for the operational reliability of hydraulic systems. Therefore, maintenance of the hydraulic fluid must not be neglected and should be performed with special care. The most important properties of the hydraulic fluid should ideally be monitored automatically and recorded in order to be able to directly counter any harmful effects.

These properties include: temperature, foaming, pH-value, concentrate ratio and microbial load.

The operator must draw up a maintenance plan for the hydraulic fluid that relates to the respective conditions of use. The maintenance plan should be prepared in close cooperation with the manufacturer of the concentrate and has to be applied consistently.

If it is not possible to monitor the hydraulic fluid continuously, the properties listed in the following should be checked at least once every week: pH – target value: 7.5 to 9.5 Caterpillar Global Mining Europe GmbH, Lünen 2012

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concentrate ratio – target value: see certificate microbial load – target value:  105 col/ml.

In addition, the electrical conductivity, foaming and the operating temperature of the hydraulic fluid should be monitored regularly.

The permissible maximum temperature of the hydraulic fluid is 55 C. During normal operation, however, an operating temperature of 45 C should not be exceeded. A higher operating temperature will reduce the stability of the emulsion and shorten the life of the sealing material.

Quality of the process water using hydraulic fluids

The quality of the water used to make the hydraulic fluid has an enormous influence on the properties of the hydraulic fluid. Accordingly, the requirements for monitoring the water quality are very high.

If the limits shown in the Table 2 are maintained, it can be assumed that the water is basically suitable.

If one or several of the limits mentioned are not complied with this should be taken into consideration when selecting a concentrate.

Additional water treatment may also be required.

The customer shall in any case, however, provide a sample of the original water to permit performing the tests required for the issue of the certificate.

Changes in the composition of the water will lead to the loss of the certificate even if they are within the limit values mentioned.

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Permissible media using as spraying water

limit values

Water used for this purpose may not contain aggressive components and dirt particles. In order to guarantee perfect long-term operation, the water must be filtered with a prefilter, with a minimum of 100 m. In order to protect the components, the limit values listed in the table must not be exceeded.

The following table lists limit values for the essential properties of the process water.

Caution!

Using water which is not of the specified quality can cause serious damage to component surfaces and the entire hydraulic system. Use only water that conforms to the specified limit values.

Limit value

Appearance, color, smell

No peculiarities permissible, e.g. turbidity, bad odor, etc.

Electrical conductivity

< 1800 S/cm

pH value

6.5 to 8.5

Na+ content

Not specified

Mg+ content

Not specified

Water hardness

< 750 mg/l CaCO3 equivalent ( 42° dH)

Cl- content



201 mg/l

SO42- content



145 mg/l

NO3- content



20 mg/l

Fe content



1 mg/l

Bacteriological requirements



105 col/ml 1)

Ratio of solid foreign matter at 1.2 mfiltering in conformity with DIN EN 12662



10 mg/l1)

Contamination class according to ISO 4406: 1999

- / 18 / 14 1)

1) The values listed must be observed during the production of hydraulic liquids.

They do not apply when the water is used exclusively as spraying water.

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Test criterion

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Tab. 2: Properties of the process water, limit values

Permissible media Lubricating greases and pastes Only the recommended lubricants or products certified as equivalent may be used.

Important!

The lubricants to be used are specified in the respective chapters.

Greases grease A1

Greases for general application, e.g. for roller bearings subject to normal load, for labyrinths, and for installation.

Tab. 3: Greases A1 Supplier

Type

Base

NLGI class

Fuchs

Renolit MP

Lithium soap

2

Worked penetration: . . . . . . . . . . . . . . . 265 to 295 (0.1 mm)

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Behavior in the presence of water: . . . practically insoluble in water Temperature range of application: . . . -40 to +120C grease A2

Greases containing additives for high pressure applications, e.g. for roller bearings and other bearing points exposed to extreme load.

Tab. 4: Grease A2 Supplier

Type

Base

Shell

Alvania E.P. grease 2

Lithium soap

NLGI class

Flashpoint in °C

2

205

Worked penetration: . . . . . . . . . . . . . . . 265 to 295 (0.1 mm) Behavior in the presence of water: . . . practically insoluble in water Temperature range of application: . . . -15 to +120C grease A8

High-load grease for high loads and low speeds, e.g. for roller bearings in drive frame and crusher, for installation and corrosion protection purposes, suitable for central lubrication.

Tab. 5: Grease A8 Supplier

Type

Base

Castrol

Molub-Alloy 3036/680-1

Lithium soap

NLGI class

Flashpoint in °C

1

210

Worked penetration: . . . . . . . . . . . . . . . 310 to 340 (0.1 mm) Behavior in the presence of water: . . . insoluble in water at 90C Temperature range of application: . . . -20 to +120C

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Permissible media Lubricating pastes lubricating paste B3

Lubricating pastes free from molybdenum disulfide, containing solid lubricants for lubricating centering bores and connections of splined shafts of sprocket drums and chain sprockets during installation.

Tab. 6: Lubricating paste B3 Supplier

Type

Base

gleitmolybdän

gleitmo 805

Lithium soap

NLGI class

Flashpoint in °C

2

220

Worked penetration: . . . . . . . . . . . . . . . 265 to 295 (0.1 mm) Behavior in the presence of water: . . . insoluble in water Temperature range of application: . . . -20 to +120C Lubricants Parting agents and lubricants with organic lubricating media on a synthetic base material for greasing threaded areas and fitting points on props and hydraulic cylinders, of pin connections and similar connection elements at the shield support.

Tab. 7: Lubricant B6

6.14

Supplier

Type

Base

Chesterton

parting and lubricating material 785

Petroleum

Behavior in the presence of water:

insoluble in water

Application temperature range:

-34 to +120°C

Flashpoint in °C 132

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lubricant B6

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For your information

Standards and guidelines

For your information If you should require spare parts or if technical problems occur, please contact our after-sales service personnel or contact us directly (homepage: www.mining.cat.com).

Standards and guidelines Referenced standards and guidelines Tab. 8: Standards and guidelines, extract

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Designation

Date of issue

Title

Directive of the European Parliament and the Council on Directive 2006/42/EC the approximation of the laws of the Member States relat2006-05-17 ing to machinery Directive of the European Parliament and the Council on the laws of the Member States concerning equipment and Directive 94/9/EC 1994-03-23 protective systems intended for use in potentially explosive atmospheres DIN EN ISO 2004-04 Safety of machinery 12100-1/A1 2009-07 DIN EN ISO 12100-2 Safety of machinery 2004-04 Petroleum products and bituminous materials DIN ISO 3733 2003-02 - Determination of water - Distillation method Non-electrical equipment for potentially explosive atmoDIN EN 13463-1 2009-07 spheres - Part 1: Basic method and requirements Electrical apparatus for explosive gas atmospheres DIN EN 60079-0 2010-03 - Part 0: General requirements DIN EN 60445 Basic and safety principles for man - machine interface 2007-11 Underground mining machinery - Specification for the DIN EN 12321 2009-07 safety requirements for armoured face conveyors Equipment and components intended for use in potentially DIN EN 1710 2008-08 explosive atmospheres in underground mines Mobile extracting machines at the face - safety requireDIN EN 1552 2003-09 ments for shear loaders and plough systems DIN EN 1804-1,-2,-3 Safety requirements for hydraulic powered roof supports 2010-05 Preparation of instructions DIN EN 62079 2001-11 - Structuring, content and presentation DIN 2000 Quality of drinking water 2000-10 DIN 6789 Documentation System 1990-09 DIN 20043 Plug connectors for hydraulics 2003-09 DIN 24320 Fire-resistant hydraulic fluids 2006-12 DIN 24343 Maintenance and inspection list for hydraulic systems 1982-02 DIN 51558-1 Determination of the acid number 1979-07 DIN 51575 Determination of sulfated ash 2011-01

Doc. no.: 8154 180 000 BA 00

SUSU / 01

7.3

Standards and guidelines Date of issue

Designation

Title

EWN 6003 1)

Tensioning force, tightening torques and surface pressure for bolts Hammer head bolts Lubricating greases & solid lubricants Non-metallic (coating) surface protection Approval procedure for fire-resistant HFA-fluids in mining

1985-02 1992-06 1985-02 2008-01

Caterpillar Global Mining Europe GmbH, Lünen 2012

E

EWN 6110 1) EWN 7068 1) EWN 7069 1) EWN 8350-1 1)

1985-02

1) EWN = works standard

7.4

Electrohydraulic control - 6 functions