FLENDER H SH Series User manual

H.SH, H.VH, H.CH, H.HH, H.DH, H.KH, H.FH, H.CM, H.HM, H.DM, H.KM, H.FM, B.SH, B.VH, B.CH,
B.HH, B.DH, B.KH, B.FH, B.CM, B.HM, B.DM, B.KM, B.FM
1...22
Assembly and machine instructions B5036-01en
Version 08/2023
Gear unit

Original assembly and machine instructions
B5036-01
Version 08/2023
Copyright (©2023 Flender GmbH)
V21
21/09/2023
14:32:53

B5036-01en Version 08/2023 3
Table of contents
1 Introduction .............................................................................................................................................. 15
1.1 Legal information ..................................................................................................................... 15
1.2 General information ................................................................................................................. 16
1.3 Lubricants ................................................................................................................................ 18
2 Safety instructions................................................................................................................................... 19
2.1 Security notes .......................................................................................................................... 19
2.2 The five safety rules................................................................................................................. 19
2.3 General information ................................................................................................................. 19
2.4 General warnings and symbols................................................................................................ 21
2.5 Special types of danger and personal protective equipment ................................................... 21
2.6 Intended use in potentially explosive atmosphere ................................................................... 24
3 Description ............................................................................................................................................... 27
3.1 General description.................................................................................................................. 27
3.2 Output shaft versions............................................................................................................... 28
3.3 Housing.................................................................................................................................... 29
3.4 Oil supply of the gear unit ........................................................................................................ 33
3.4.1 Splash lubrication..................................................................................................................... 33
3.5 Bearing arrangement of the shafts........................................................................................... 33
3.6 Shaft seal................................................................................................................................. 33
3.6.1 Rotary shaft sealing rings ........................................................................................................ 33
3.6.2 Taconite seal............................................................................................................................ 34
3.7 Backstop .................................................................................................................................. 36
3.8 Torque limiting backstop (special version)............................................................................... 37
3.9 Cooling..................................................................................................................................... 39
3.9.1 Fan........................................................................................................................................... 39
3.9.2 Cooling coil .............................................................................................................................. 40
3.9.3 Mounted oil supply system....................................................................................................... 43
3.9.3.1 Attached oil supply system with air-oil cooler .......................................................................... 43
3.9.3.2 Attached oil supply system with water-oil cooler...................................................................... 44
3.9.3.3 Pump........................................................................................................................................ 47
3.9.3.4 Oil filter..................................................................................................................................... 47
3.9.4 Separate oil supply system...................................................................................................... 47

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3.10 Couplings ................................................................................................................................. 48
3.11 Shrink disk ............................................................................................................................... 48
3.12 Heating..................................................................................................................................... 48
3.13 Oil level indicator...................................................................................................................... 50
3.14 Oil-level monitoring system...................................................................................................... 50
3.15 Oil-temperature monitoring system.......................................................................................... 52
3.16 Bearing monitoring................................................................................................................... 53
3.16.1 Bearing monitoring using a Pt100 resistance thermometer.................................................... 53
3.16.2 Bearing monitoring by shock-pulse transducer........................................................................ 53
3.16.3 Bearing monitoring by acceleration sensor.............................................................................. 54
3.17 Auxiliary drive........................................................................................................................... 55
3.17.1 Auxiliary drive, designed as maintenance drive....................................................................... 55
3.17.2 Auxiliary drive, designed as a load drive.................................................................................. 57
3.17.3 Overrunning clutch................................................................................................................... 58
4 Application planning................................................................................................................................ 61
4.1 Scope of delivery ..................................................................................................................... 61
4.2 Transport.................................................................................................................................. 61
4.3 Attachment points .................................................................................................................... 63
4.4 Special aspects during storage................................................................................................ 66
5 Assembly .................................................................................................................................................. 67
5.1 General assembly instructions................................................................................................. 67
5.2 Unpacking the gear unit........................................................................................................... 68
5.3 Gear unit assembly.................................................................................................................. 69
5.3.1 Foundation ............................................................................................................................... 69
5.3.2 Description of assembly work .................................................................................................. 70
5.3.2.1 Introduction .............................................................................................................................. 70
5.3.2.2 Alignment ................................................................................................................................. 72
5.3.3 Gear unit assembly on housing foot ........................................................................................ 74
5.3.3.1 Installation on a base frame..................................................................................................... 74
5.3.3.2 Mounting on a concrete foundation using stone bolts or foundation blocks ............................ 75
5.3.3.3 Mounting on a concrete foundation using anchor bolts ........................................................... 77
5.3.3.4 Mounting on a gear unit swing base ........................................................................................ 79
5.3.4 Mounting on a block flange...................................................................................................... 81
5.3.4.1 Requirements........................................................................................................................... 81
5.3.4.2 Mounting a gear unit with block flange..................................................................................... 82
5.3.5 Mounting the torque arm for the gear unit housing.................................................................. 83
5.3.5.1 Mounting the torque arm.......................................................................................................... 83

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B5036-01en Version 08/2023 5
5.3.5.2 Mounting the torque arm.......................................................................................................... 83
5.4 Shaft-mounted gear unit with hollow shaft............................................................................... 84
5.4.1 Shaft-mounted gear unit with hollow shaft and parallel keyway .............................................. 84
5.4.1.1 Preparations............................................................................................................................. 84
5.4.1.2 Assembly ................................................................................................................................. 85
5.4.1.2.1 Mounting .................................................................................................................................. 86
5.4.1.2.2 Axial locking............................................................................................................................. 87
5.4.1.3 Dismantling .............................................................................................................................. 87
5.4.2 Shaft-mounted gear unit with hollow shaft and spline according to DIN 5480......................... 90
5.4.2.1 Preparations............................................................................................................................. 90
5.4.2.2 Assembly ................................................................................................................................. 91
5.4.2.2.1 Pulling on with integrated DU bushing..................................................................................... 92
5.4.2.2.2 Mounting with DU bushing as a separate component ............................................................. 93
5.4.2.2.3 Axial locking............................................................................................................................. 93
5.4.2.3 Dismantling .............................................................................................................................. 94
5.4.3 Shaft-mounted gear unit with hollow shaft and shrink disk...................................................... 96
5.4.3.1 Assembly ................................................................................................................................. 97
5.4.3.1.1 Mounting with integrated DU bushing...................................................................................... 98
5.4.3.1.2 Mounting with DU bushing as a separate component ............................................................. 99
5.4.3.1.3 Axial locking........................................................................................................................... 100
5.4.3.2 Dismantling ............................................................................................................................ 100
5.5 Gear unit with type F flange shaft .......................................................................................... 100
5.5.1 Requirements......................................................................................................................... 100
5.5.2 Installing the gear unit............................................................................................................ 101
5.6 Gear units with version C output shafts ................................................................................. 101
5.7 Couplings ............................................................................................................................... 102
5.8 Connecting components ........................................................................................................ 103
5.8.1 Gear units with mounted components ................................................................................... 103
5.8.2 Wire gear unit with wiring in terminal box .............................................................................. 104
5.8.3 Cooling coil connection.......................................................................................................... 104
5.8.4 Connecting the air‐oil cooler .................................................................................................. 105
5.8.5 Water-oil cooler connection ................................................................................................... 105
5.8.6 Connecting the heating element ............................................................................................ 106
5.8.7 Connecting the pressure monitor........................................................................................... 106
5.8.8 Installing a separate oil supply system .................................................................................. 107
5.8.9 Connecting the oil level monitoring system............................................................................ 107
5.8.10 Connecting the Pt 100 resistance thermometer..................................................................... 107
5.8.11 Connecting the temperature monitor ..................................................................................... 108
5.8.12 Connecting the bearing monitoring system............................................................................ 108
5.8.13 Connecting the motor pump................................................................................................... 108
5.8.14 Electrical connections ............................................................................................................ 109

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5.9 Tightening procedure............................................................................................................. 109
5.9.1 Introduction ............................................................................................................................ 109
5.9.2 Bolt connection classes ......................................................................................................... 110
5.9.3 Tightening torques and preload forces .................................................................................. 110
5.10 Final work............................................................................................................................... 112
6 Commissioning ...................................................................................................................................... 115
6.1 Measures prior to commissioning .......................................................................................... 115
6.1.1 Gear unit with backstop ......................................................................................................... 116
6.1.2 Gear unit with auxiliary drive.................................................................................................. 116
6.1.3 Oil level monitoring system.................................................................................................... 117
6.1.4 Gear units with cooling coil .................................................................................................... 117
6.1.5 Gear unit with heating............................................................................................................ 118
6.1.6 Gear units with oil supply system........................................................................................... 118
6.1.7 Filling lubricant into gear units with mounted backstop or auxiliary drive .............................. 119
6.2 Measures during commissioning ........................................................................................... 119
6.2.1 Gear units with torque-limiting backstop................................................................................ 120
7 Operation ................................................................................................................................................ 121
7.1 Operating values.................................................................................................................... 121
7.2 Irregularities in operation ....................................................................................................... 122
7.3 Taking the unit out of service................................................................................................. 122
8 Servicing ................................................................................................................................................. 125
8.1 General maintenance information.......................................................................................... 125
8.2 Maintenance schedule........................................................................................................... 125
8.3 Maintenance and servicing work............................................................................................ 127
8.3.1 Checking the oil temperature................................................................................................. 127
8.3.2 Filling the backstop with oil .................................................................................................... 128
8.3.3 Replace the backstop ............................................................................................................ 128
8.3.4 Checking the friction linings of the torque-limiting backstop .................................................. 128
8.3.5 Filling the overrunning clutch of the auxiliary drive unit with oil ............................................. 129
8.3.6 Checking the auxiliary drive................................................................................................... 130
8.3.7 Cleaning the fan and gear unit............................................................................................... 130
8.3.8 Checking the cooling coil ....................................................................................................... 131
8.3.9 Inspecting the shrink disk....................................................................................................... 132
8.3.10 Cleaning the coarse filter ....................................................................................................... 132
8.3.11 Cleaning the double change-over filter .................................................................................. 132
8.3.12 Checking the speed monitoring of the auxiliary drive ............................................................ 133
8.3.13 Measuring the vibration levels of the rolling-contact bearings ............................................... 133
8.3.14 Measuring the temperature at the rolling-contact bearings.................................................... 134

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B5036-01en Version 08/2023 7
8.3.15 Checking the ignition protection system ................................................................................ 134
8.3.16 Check that all of the fastening bolts are tight......................................................................... 134
8.3.17 General inspection of the gear unit........................................................................................ 135
8.3.18 Final work............................................................................................................................... 135
8.4 Possible faults........................................................................................................................ 135
9 Service & Support ..................................................................................................................................141
9.1 Contact................................................................................................................................... 141
10 Disposal .................................................................................................................................................. 143
11 Spare parts ............................................................................................................................................. 145
A Declaration of incorporation ................................................................................................................. 147
A.1 Declaration of Incorporation................................................................................................... 147
B Declaration of conformity...................................................................................................................... 149
B.1 EU Declaration of Conformity ................................................................................................ 149
C Technical data ........................................................................................................................................ 151
C.1 General technical data........................................................................................................... 151
C.2 Ambient temperature ............................................................................................................. 153
C.3 Types ..................................................................................................................................... 154
C.4 Weights .................................................................................................................................. 155
C.5 Oil quantities .......................................................................................................................... 157
C.6 Enveloping surface sound pressure level .............................................................................. 158
Index ........................................................................................................................................................ 167

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8 Version 08/2023 B5036-01en

B5036-01en Version 08/2023 9
List of tables
Table2-1 Symbols and markings...............................................................................................................20
Table2-2 General warnings .......................................................................................................................21
Table3-1 Designs and associated directions of rotation............................................................................27
Table3-2 Taconite seal versions................................................................................................................35
Table3-3 Required cooling water flow rate................................................................................................42
Table3-4 Information about the specific heat output .................................................................................49
Table5-1 Motor assignment for gear unit swing base ..............................................................................80
Table5-2 Motor assignment for housing support.......................................................................................84
Table5-3 Dimensions for the threaded holes at the face sides of standard gear unit hollow shafts .........89
Table5-4 Maximum forcing pressures .......................................................................................................90
Table5-5 Maximum forcing pressures .......................................................................................................96
Table5-6 Tightening torques at the flange connections ..........................................................................101
Table5-7 Information on screwing fastening bolts...................................................................................110
Table5-8 Preload forces and tightening torques .....................................................................................111
Table7-1 Operating values ......................................................................................................................121
Table8-1 Maintenance and servicing activities........................................................................................125
Table8-2 Possible faults and how to rectify them....................................................................................135
TableC-1 Explosion protection marking ...................................................................................................153
TableC-2 Weights ....................................................................................................................................155
TableC-3 Weights ....................................................................................................................................155
TableC-4 Weights ....................................................................................................................................156
TableC-5 Weights ....................................................................................................................................156
TableC-6 Weights ....................................................................................................................................156
TableC-7 Weights ....................................................................................................................................156
TableC-8 Oil quantities.............................................................................................................................157
TableC-9 Oil quantities.............................................................................................................................157
TableC-10 Oil quantities.............................................................................................................................157

List of tables
10 Version 08/2023 B5036-01en
TableC-11 Enveloping surface sound pressure level ................................................................................158
TableC-12 Enveloping surface sound pressure level ................................................................................159
TableC-13 Enveloping surface sound pressure level ................................................................................159
TableC-14 Enveloping surface sound pressure level ................................................................................160
TableC-15 Enveloping surface sound pressure level ................................................................................161
TableC-16 Enveloping surface sound pressure level ................................................................................162
TableC-17 Enveloping surface sound pressure level ................................................................................163
TableC-18 Enveloping surface sound pressure level ................................................................................164

B5036-01en Version 08/2023 11
List of figures
Image3-1 Output shaft versions .................................................................................................................28
Image3-2 Plate: Lubrication point...............................................................................................................29
Image3-3 Gear unit components for model H..H ≤ 12 gear units...............................................................30
Image3-4 Gear unit components for model H..H ≥ 13 gear units...............................................................30
Image3-5 Gear unit components for model H..M ≥ 13 gear units ..............................................................31
Image3-6 Gear unit components for model B..H≤12 gear units ...............................................................31
Image3-7 Gear unit components for model B..H≥13 gear units ...............................................................32
Image3-8 Gear unit components for model B..M≥13 gear units...............................................................32
Image3-9 Rotary shaft sealing ring.............................................................................................................34
Image3-10 Taconite seal..............................................................................................................................34
Image3-11 Taconite seal, variants E, F, F‐F, F‐H and F‐K ..........................................................................35
Image3-12 Backstop.....................................................................................................................................37
Image3-13 Torque limiting backstop ............................................................................................................38
Image3-14 Fan .............................................................................................................................................40
Image3-15 Cooling coil connections.............................................................................................................42
Image3-16 Oil supply system with air-oil cooler mounted on gear unit, type H............................................44
Image3-17 Oil supply system with air-oil cooler mounted on type B..: gear units ........................................44
Image3-18 Oil supply system with water-oil cooler mounted on type H... gear units ...................................46
Image3-19 Oil supply system with water-oil cooler mounted on type B... gear units ...................................46
Image3-20 Heating system on type H... and B... gear units.........................................................................49
Image3-21 Oil level monitoring system on type H... and B... gear units.......................................................51
Image3-22 Oil-temperature monitoring system for gear units, model H... and B... ......................................52
Image3-23 Bearing monitoring using a Pt 100 resistance thermometer ......................................................53
Image3-24 Bearing monitoring using shock-pulse transducer .....................................................................54
Image3-25 Fundamental design of gear unit with main and auxiliary drives................................................55
Image3-26 Gear unit version........................................................................................................................57
Image4-1 Transport symbols......................................................................................................................63

List of figures
12 Version 08/2023 B5036-01en
Image4-2 Shear and lateral pulling when using eye bolts..........................................................................64
Image4-3 Position of the attachment points on type H... and B... gear units .............................................64
Image4-4 Position of the attachment points for type H.. gear units with motor ..........................................64
Image4-5 Position of the attachment points for type B.. gear units with motor ..........................................65
Image4-6 Position of the attachment points for type B.. gear units with gear unit swing base ..................65
Image4-7 Position of the attachment points on type B3.H gear units with auxiliary drive ..........................65
Image5-1 Gap dimension at grease labyrinth ............................................................................................71
Image5-2 Alignment surface.......................................................................................................................72
Image5-3 Alignment surfaces for gear units up to size 12 .........................................................................73
Image5-4 Alignment surfaces for gear units from size 13 and larger.........................................................73
Image5-5 Stone bolt ...................................................................................................................................75
Image5-6 Foundation block........................................................................................................................76
Image5-7 Inserted anchor bolt....................................................................................................................77
Image5-8 Tightened anchor bolt.................................................................................................................78
Image5-9 Support for gear unit swing base ...............................................................................................80
Image5-10 Gear unit with block flange.........................................................................................................82
Image5-11 Torque arm for the gear unit housing.........................................................................................83
Image5-12 Gear unit with a hollow shaft and parallel keyway .....................................................................85
Image5-13 Mounting process with screw spindle.........................................................................................86
Image5-14 Dismantling using an end plate ..................................................................................................88
Image5-15 Dismantling using hydraulic pulling equipment ..........................................................................88
Image5-16 Hollow shaft with parallel keyway...............................................................................................89
Image5-17 Preparation for gear units with hollow shaft and spline..............................................................91
Image5-18 Pulling on with integrated DU bushing .......................................................................................92
Image5-19 Dismantling using an end plate ..................................................................................................95
Image5-20 Dismantling using hydraulic pulling equipment ..........................................................................95
Image5-21 Preparation for gear units with hollow shaft and shrink disk ......................................................99
Image5-22 Possible misalignments............................................................................................................102
Image5-23 Alignment, based on the example of a flexible coupling ..........................................................103
Image8-1 Torque limiting backstop ..........................................................................................................129

List of figures
B5036-01en Version 08/2023 13
ImageC-1 Rating plate ..............................................................................................................................151
ImageC-2 Structure of gear unit markings ................................................................................................152

List of figures
14 Version 08/2023 B5036-01en

B5036-01en Version 08/2023 15
Introduction 1
Naming convention
This product, which can be used as a gear reduction unit or multiplier gear unit, is referred to
below as "gear unit".
1.1 Legal information1.1 Legal information
Warning system
These instructions contain information you must observe for your own personal safety as
well as to avoid damage to property and persons. The information regarding your personal
safety is highlighted with a warning triangle. Information exclusively regarding property dam-
age alone is not marked with a warning triangle. Depending on the hazard class, the warn-
ings shall be depicted as follows, in descending order.
DANGER
means that death or severe physical injury will occur if the relevant precautionary meas-
ures are not taken.
WARNING
means that death or severe physical injury may occur if the relevant precautionary meas-
ures are not taken.
CAUTION
means that mild physical injury may occur if the relevant precautionary measures are not
taken.
NOTE
means that damage to property may occur if the relevant precautionary measures are not
taken.
If multiple hazard classes come into play, the warning for the highest level in question shall
always be used. If a warning containing the warning triangle warns of harm to individuals, the
same warning may also include a warning regarding damage to property.
Information
Information
Information offers additional notes, assistance and tips for handling the product.

Introduction
1.2 General information
16 Version 08/2023 B5036-01en
Qualified personnel
The product/system associated with this documentation may only be used by qualified per-
sonnel trained to perform the relevant tasks, taking into account the associated documenta-
tion for the relevant tasks, particularly the safety information and warnings included therein.
Due to their qualification and experience, qualified personnel are capable of detecting risks
and avoiding potential hazards when dealing with these products/systems.
Intended use of Flender products
Please note the following:
WARNING
Flender products are only suitable for the uses set out in the catalogue and associated
technical documentation. If third-party products and components are used, these must be
recommended and/or authorised by Flender. Safe and flawless operation of the products
requires proper transport, proper storage, setup, assembly, installation, commissioning,
operation and maintenance. The permissible environmental conditions must be adhered
to. Instructions in the associated documentation must be followed.
Trademarks
All designations marked with the trademark symbol ® are registered trademarks of Flender
GmbH. Other designations in this document may be trademarks whose use by third parties
for their own purposes may violate the rights of the owner.
Liability disclaimer
We have assessed the contents of these instructions for compliance with the hardware and
software described. However, deviations cannot be ruled out, so we are unable to accept li-
ability for full compliance. The details in these instructions are regularly reviewed and neces-
sary corrections are contained in subsequent editions.
1.2 General information1.2 General information
Purpose of these instructions
These instructions describe the gear unit and provide information about its handling – from
assembly to maintenance.
Please keep these instructions for later use. Please read these instructions prior to handling
the gear unit and observe the information they contain.

Introduction
1.2 General information
B5036-01en Version 08/2023 17
Information
Liability disclaimer
Please make sure that every person who is commissioned to work on the gear unit has
read and understood these instructions prior to handling the gear unit and adheres to all of
the points. Non-adherence to the instructions can cause product or property damage or per-
sonal injury.
Flender accepts no liability for damages and disruption to operations that result from non-
adherence to the instructions.
The described gear unit represents the state of the art at the time these instructions were
printed.
In the interest of further development, Flender reserves the right to make such changes to
the individual assembly units and accessories that increase performance and safety whilst
maintaining the essential features.
Explosion Protection Directive
The term “Explosion Protection Directive” used in these instructions refers to the relevant
harmonization legislation of the European Union relating to equipment and protective sys-
tems intended for use in potentially explosive atmospheres complied with in accordance with
the accompanying EU Declaration of Conformity.
Required basic knowledge
In order to understand these instructions, you will need the following general knowledge
about gear units. You will also need a basic understanding of the following topics:
• Application planning
• Assembly
• Commissioning
• Maintenance
Documentation landscape
These instructions are part of the delivery of your gear unit.
These instructions form part of the complete documentation supplied with the gear unit. The
complete documentation encompasses other documents, including:
• Data sheet
• List of equipment
• Dimension drawing
• Instructions 7300 on gear unit lubrication and preservation
• Instructions for mounted components
• Instructions for devices from third parties
Copyright
The copyright of these instructions is held by Flender.

Introduction
1.3 Lubricants
18 Version 08/2023 B5036-01en
Without the authorisation of Flender, these instructions may not be used wholly or in parts for
competitors’ purposes or be given to third parties.
If you have any technical queries, please contact the Customer Services address (Side141).
1.3 Lubricants1.3 Lubricants
The quality of the oil used must meet the requirements of the instructions7300, which is
provided as a separate item, otherwise the warranty provided by Flender will be void. Flen-
derurgently recommends that one of the oil types listed in instructions 7300, which have
been appropriately tested and comply with the requirements, is used.
To avoid misunderstandings, Flender points out that, by making this recommendation, it is
not approving the product in the sense of expressing a warranty for the quality of the lubric-
ants supplied by your supplier. Every lubricant manufacturer is required to guarantee the
quality of his/her products.
Information such as oil type, oil viscosity and required oil quantity can be found on the rating
plate of the gear unit and in the documentation supplied with the gear unit.
The oil quantity specified on the rating plate is an approximate value. The actual quantity of
oil required is determined by the marking on the oil dipstick or oil sight glass.
The instructions for the current lubricant recommendations of Flender can also be viewed on
the Internet (https://www.flender.com/lubricants).
The oils listed there undergo continuous testing. As a result, the recommended oil types
might in future be removed from the list or replaced by more advanced oils.
Flender recommends regular inspection to ascertain whether the selected lubricating oil is
still approved by Flender. If it is not, another brand of oil should be selected instead.

B5036-01en Version 08/2023 19
Safety instructions 2
2.1 Security notes2.1 Security notes
Flender offers products and solutions with industrial security functions, which support the
safe and secure operation of plants, systems, machines and networks.
In order to safeguard plants, systems, machines and networks against cyber threats it is ne-
cessary to implement (and continually maintain) a holistic industrial security concept that cor-
responds to the current state of the art. Flender products and solutions undergo continuous
development in this respect.
Customers are responsible for preventing unauthorised access to their plants, systems, ma-
chines and networks. These systems, machines and components shall be connected to the
company network or the Internet only when and to the extent that this is absolutely neces-
sary and appropriate protective measures (e.g. firewalls and/or network segmentation) shall
be taken.
You can find further information about possible protection measures as part of Industrial Se-
curity in the following international series of standards, for example: IEC62443 "Network and
system security".
Flender products and solutions undergo continuous development in order to make them
even safer. Flender strongly recommends that you regularly implement product updates as
soon as they become available and that you only use the current product versions. Use of
older or no longer supported versions can increase the risk of cyber threats.
2.2 The five safety rules2.2 The five safety rules
In order to protect yourself and prevent any damage to property, always observe the safety
relevant information and the following five safety rules (as per EN50110-1 "Working on isol-
ated equipment") when working on electrical components of the plant.
Prior to starting work on the machine, follow the safety rules listed below:
1. Disconnect
Also disconnect auxiliary circuits such as the anti-condensation heater
2. Safeguard against restart
3. Ensure that the system is de-energised
4. Earth and short circuit
5. Cover or cordon off adjacent live parts
When all the work is complete, cancel the safety measures in the reverse sequence.
2.3 General information2.3 General information
Introduction
All work on the gear unit should be performed with care and only by qualified personnel.

Safety instructions
2.3 General information
20 Version 08/2023 B5036-01en
Symbols on the gear unit
The following symbols apply to the gear unit; some of which are found as coloured markings
on the gear unit:
Points labelled on the gear unit Symbol Coloured markings
Earth connection point
Air relief point yellow
Oil filling point yellow
Oil draining point white
Oil level indicator red
Oil level measurement red
Oil overflow
Connection point for vibration monitoring
Lubrication point red
Apply grease
Lifting eye
Eye bolt
Do not unscrew
Alignment surface, horizontal
Alignment surface, vertical
These symbols indicate the oil level
checking procedure using the oil dipstick.