Cat Shield support 2250/4700-2X6759-2050 Operating & Maintenance Manual SN LW12881 – LWF12923 – PDF DOWNLOAD

Description

Cat Shield support 2250/4700-2X6759-2050 Operating & Maintenance Manual SN LW12881 – LWF12923 – PDF DOWNLOAD

FILE DETAILS:

Cat Shield support 2250/4700-2X6759-2050 Operating & Maintenance Manual SN LW12881 – LWF12923 – PDF DOWNLOAD

Language : English
Pages : 147
Downloadable : Yes
File Type : PDF

IMAGES PREVIEW OF THE MANUAL:

DESCRIPTION:

Cat Shield support 2250/4700-2X6759-2050 Operating & Maintenance Manual SN LW12881 – LWF12923 – PDF DOWNLOAD

Part-No.: 4840495
Serial-No.: LW12881 – LWF12923

About this manual:
This chapter contains important information that makes it easier for you to use this manual. You
will also get information about the structure of the manual and the symbols, characters and
abbreviations used and frequently used terms.
1.1 How to use this manual:
applicable operating manual :

• Using an operating manual that was not specifically written for
  the machine con- cerned can result in a safety hazard for yourself and others. Ensure that the data
  on the machine complies with the data given in the operating manual.
• The operating manual must be accessible at all times to all persons working on or with the shield.
  It should always be available at the place of operation.

new operating manual:

Request a new operating manual immediately if the current operating
manual is no longer complete or has become illegible.
Persons for whom the operating manual is intended
This operating manual is intended for those persons who work with or on the
shields. All persons working on the face, at the edge of the face or at the entry
must read this operating manual.
This includes persons who:

• are in charge of transport,
• set up the rise heading,
• perform installation/removal work,
• operate the shields,
• correct malfunctions,
• carry out daily routine work on the face or in the entry,
• monitor and look after for the hydraulic system,
• carry out maintenance work,
• carry out repair work.

Supervisory personnel who:

• initiate the activities mentioned above and/or
• supervise them.

TABLE OF CONTENTS:

Cat Shield support 2250/4700-2X6759-2050 Operating & Maintenance Manual SN LW12881 – LWF12923 – PDF DOWNLOAD

1 About this manual 5
1 1 How to use this manual 5
1 2 Signs and symbols used 6
2 Safety 7
2 1 General safety instructions 7
2 2 Personnel 7
2 3 Repair and servicing 7
2 4 Operating conditions 8
2 4 1 Intended use 8
2 4 2 Unauthorized use 8
2 5 Using the machine and working on the machine 9
2 6 Notes on the hydraulic system 10
2 6 1 Recommended storage and use period 12
3 Storage and transport 14
3 1 Storage 14
3 2 Transport 15
3 3 Transporting the entire shield support 18
3 3 1 Face shield 18
3 3 2 Transport safety devices 19
3 3 3 Relay bar assembly 20
3 3 4 Transport lock 21
3 3 5 Transport safety device 22
3 3 6 Flipper 22
3 3 7 Side seal 23
3 3 8 Hose connections 24
4 Installation 25
4 1 Pre-assembly of the shield units 25
4 2 How to install the shield units 25
4 2 1 Shield units 25
4 2 2 Pressure equalization of the electronic control 27
4 2 3 Supply connections 28
4 2 4 Establishing a link between connections 30
4 3 Requirements for the face hydraulic system 31
4 4 Water spraying system requirements 31
4 5 Commissioning 32
4 5 1 To be observed prior to commissioning 32
4 5 2 How to put the support into operation 34
4 5 3 Corrosion protection of hydraulic components 34
5 Operation 35
5 1 Requirements 35
5 1 1 Operating conditions 35
5 1 2 Safety requirements 37
5 2 Operation of the shield support 40
5 3 Work safety 46
Shield support 2250/4700-2X6759-2050
Media-ID: EM025581-00-DE / Caterpillar Global Mining Europe GmbH 2016 ©
Table of contents
5 4 Shield components 47
5 5 Overview of shield hydraulics 49
5 5 1 Design of the ball valves 49
5 5 2 Hydraulic components on the shield 51
5 6 Hydraulic components 77
5 7 Repair and emergency operation 88
5 8 Operation and functions of the electrohydraulic control unit 89
5 8 1 Shield functions – control unit, 14 functions 90
5 8 2 Shield functions – water valve unit 93
5 9 Plug with pressure relief 94
5 10 Maintenance 98
5 11 Regular, scheduled damage assessment 100
5 12 Troubleshooting 101
5 12 1 Instructions for troubleshooting 101
5 12 2 3/2-way or pilot valve 104
5 12 3 Piloted check valves 104
5 12 4 Checking the prop check valves 104
5 12 5 Internal bypass in props 104
5 12 6 Pressure relief valve defective 105
5 12 7 Defective or clogged filter 105
6 Technical data 106
6 1 Technical description 107
6 1 1 Main dimensions 107
6 1 2 Skid with lemniscatic link and relay bar assembly 108
6 1 3 Relay bar assembly 110
6 1 4 Lemniscatic links 112
6 1 5 Canopy 115
6 1 6 Flipper 117
6 1 7 Prop head with peg 119
6 1 8 Side seal 120
6 1 9 Caving shield 124
6 1 10 Caving flap 126
6 2 Technical data, steel structure 127
6 3 Hydraulic system 128
6 3 1 Shield hydraulics 128
6 4 Two-stage telescopic prop (peg) 129
6 4 1 Function 131
6 5 Hydraulic cylinders 132
6 5 1 Layout 132
6 5 2 Props and cylinders 133
6 6 Pressure relief valves 139
6 7 Angles of inclination of the canopy 141
6 8 Tightening torques 142
6 8 1 Screws and bolts with ISO metric thread 142
6 9 Permissible media 143
6 9 1 Hydraulic fluids 143
6 9 2 Quality of the process water 145
6 9 3 Greases and lubricating pastes 146

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