Bosch Rexroth SB24/34 User manual

Instruction manual
RE 66170-B/2019-05-15 English
Load-sensing control block
SB24/34
for mobile applications

©BoschRexrothAG2019. Allrights reserved,
also regarding any disposal, exploitation,
reproduction, editing, distribution, aswell
asinthe event ofapplications forindustrial
property rights.
The data specified within only serves
todescribe the product. No statements
concerning acertain condition orsuitability
foracertain application can bederived from
our information. The information given does
not release the user from the obligation
ofown judgment and verification. It must be
remembered that our products are subject to
anatural process of wear and aging.
The cover shows an example application. The
product delivered may differ from the image on
the cover.
The original instruction manual was created in
the German language.

RE 66170-B/2019-05-15, Control block SB24/34, Bosch Rexroth AG
3/78Contents
Contents
1 About this documentation 5
1.1 Validity of the documentation 5
1.2 Required and supplementary documentation 5
1.3 Representation of information 6
1.3.1 Safety instructions 6
1.3.2 Symbols 7
1.3.3 Designations 7
1.3.4 Abbreviations 8
2 Safety instructions 9
2.1 About this chapter 9
2.2 Intended use 9
2.3 Improper use 10
2.4 Personnel qualifications 10
2.5 General safety instructions 10
2.6 Product-specific safety instructions 11
2.7 Personal protective equipment 13
3 General instructions on property damage and product damage 14
4 Scope of delivery 17
5 About these products 18
5.1 Performance description 18
5.2 Product identification 18
5.3 Product description 19
5.3.1 Definition of control block segments 19
5.3.2 Types of actuation 20
5.3.3 Definition of control block segment sides 20
5.3.4 Port designation 21
5.3.5 Flange figure 21
5.3.6 Connecting plate for fixed pump (C2) 22
5.3.7 Connecting plate for fixed pump (C4) 23
5.3.8 Connecting plate (C3) 25
5.3.9 Connecting plate for variable pump (C6) 26
5.3.10 Hitch control valve EHR24-EM2 28
5.3.11 Hitch control valve EHR24-EHS 30
5.3.12 Control valveSB24-M without individual pressure compensator 33
5.3.13 Control valveSB24-M with individual pressure compensator 35
5.3.14 Control valve SB24-EHS 38
5.3.15 Control valveSB34-EHS 40
5.3.16 End plate (E1) 42
5.3.17 End plate (E2) 43
5.3.18 Central connecting plate 44
5.3.19 Intermediate plate 46
5.4 Control block versions 47
5.4.1 Examples for control blocks with connecting plate, end plate and central
connecting plate 47
5.4.2 Examples for control blocks with connecting plate or end valve 48
5.5 Combination options 49

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6 Transport and storage 52
6.1 Transporting the control block/control block segment 52
6.1.1 Transport by hand 52
6.1.2 Transport with lifting gear 52
6.2 Storage of control block/control block segment 53
7 Installation 55
7.1 Unpacking 55
7.2 Assembly of control block segments to form a control block 55
7.3 Painting the control block/control block segment 55
7.4 Installation conditions 56
7.5 Installation position 56
7.6 Assembly of the control block/control block segment 56
7.6.1 Preparation 56
7.6.2 Attachment of the control block/control block segment 56
7.6.3 Completion of assembly 57
7.6.4 Mechanical connection of the control block/control block segment 57
7.6.5 Hydraulic connection of the control block/control block segment 58
7.6.6 Customer-specific coupling connection 60
7.6.7 Electric connection of the control block/control block segment 61
8 Commissioning 62
8.1 Before initial commissioning 62
8.2 Initial commissioning 63
8.3 Air bleeding 64
8.3.1 Air bleeding at control block/control block segment 64
8.3.2 Air bleeding at SB control valves 64
8.3.3 Air bleeding at control valves with EHS 65
8.3.4 Air bleeding at EHR control valves 66
8.4 Recommissioning after standstill 66
9 Operation 67
9.1 Software description 67
10 Maintenance and repair 68
10.1 Cleaning and care 68
10.2 Inspection and maintenance 68
10.3 Repair 68
10.4 Spare parts 69
11 Removal and replacement 70
11.1 Required tools 70
11.2 Preparing for removal 70
11.3 Removal of control block/control block segment from machine 70
11.4 Preparing the components for storage or further use 70
12 Disposal 71
13 Extension and conversion 72
14 Troubleshooting 73
14.1 How to proceed for troubleshooting 73
14.2 Malfunction table 74
15 Technical data 75
16 Alphabetical index 76
Contents

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1 About this documentation
1.1 Validity of the documentation
This documentation applies for load-sensing control blocksSB24/34 of
BoschRexroth including the following control block segments:
• Connecting plate, central connecting plate, intermediate plate and end plate
• Control valvesSB24-M, SB24-EHS and SB34-EHS
• Control valvesEHR24-EHS and EHR24-EM2
This documentation applies for all mentioned control blocks and control block
segments independent from their manufacturing date until new revision of
thisdocument.
This documentation is intended for machine/system manufacturers as well as
authorized specialists and dealers.
This documentation contains important information on safe and proper transport,
installation and disassembly, commissioning, operation, maintenance and servicing
of the product.
▶ Read this documentation completely and in particular the chapters2 "Safety
instructions" on page9 and3 "General instructions on property damage and
product damage" on page14 before starting to work with the control block/
control block segment.
1.2 Required and supplementary documentation
▶ Only commission the product if the documentation marked with the
book symbol is available, understood and complied with.
Table 1: Required and supplementary documentation
Title Document number Document type
Technical data sheet
Contains the permissible technical data.
Please bear in mind that different technical data sheets apply
depending on the version:
Data sheet
Load-sensing control block SB24/34 66170
Load-sensing directional valves in sandwich plate design
SB24-EHS, SB34-EHS
66171
Load-sensing directional valves in sandwich plate design SB24-M 66172
Plates SB24, SB34 66173
Hitch control valves EHR5, EHR24-EM2, EHR24-EHS 66126
Load-sensing control blockSB24/34
Contains all information required for directional valve installation
66170-10-R Manual
Order confirmation
Contains the order-related technical data of the control block.
Order confirmation
Offer drawing
Contains the outer dimensions, all connections and the hydraulic
circuitdiagram of the control block.
Offer drawing

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Table 1: Required and supplementary documentation
Title Document number Document type
Hydraulic fluids based on mineral oils and related hydrocarbons
Describes the requirements for hydraulic fluids on mineral oil basis and
related hydrocarbons for operation with Rexroth hydraulic components,
and provides support for selection of suitable hydraulic fluids for the
hydraulic system.
90220 Data sheet
Environmentally acceptable hydraulic fluids
Describes the requirements for environmentally acceptable hydraulic
fluids on mineral oil basis and related hydrocarbons for operation with
Rexrothhydraulic components, and provides support for selection of
suitable hydraulic fluids for the hydraulic system.
90221 Data sheet
For further documentation on installation and repair, refer toTable 36 on
page69 or visit Rexroth on
www.boschrexroth.com/mobile-hydraulics-catalog.
1.3 Representation of information
Standardized safety instructions, symbols, terms and abbreviations are used
throughout this documentation to ensure safe and proper use of the product.
Forclarification, they are explained in the sections below.
1.3.1 Safety instructions
This documentation includes safety instructions in chapters2.6 "Product-specific
safety instructions" on page11 and3 "General instructions on property damage
and product damage" on page14, as well as prior to sequences of actions or
instructions with risk of injury or property damage. Always follow the measures
fordanger prevention associated with the use of this product.
Safety instructions are set out as follows:
SIGNAL WORD
Type and source of danger
Consequences of noncompliance
▶ Measures to prevent danger
•Warning sign: draws attention to the danger
•Signal word: identifies the degree of the danger
•Type and source of danger: indicates the type and source of the danger
•Consequences: describes what occurs if safety instructions are disregarded
•Precautions: states how the danger can be avoided

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Table 2: Hazard classes as defined in ANSIZ535.6
Warning sign, signal word Meaning
DANGER Identifies a dangerous situation that will result in death or
serious injury if it is not avoided.
WARNING Identifies a dangerous situation that may result in death or
serious injury if it is not avoided.
CAUTION Identifies a dangerous situation that may result in minor to
moderate injury if it is not avoided.
NOTICE Property damage: The product or surrounding area may
bedamaged.
1.3.2 Symbols
The following symbols indicate information that is not safety-relevant but increases
understanding of the documentation.
Table 3: Meaning of symbols
Symbol Meaning
If this information is disregarded, the product cannot be used and/or
operated to its full extent.
▶ Single, independent action
1.
2.
3.
Numbered instruction:
The numbers indicate that the actions must be completed in order.
Black circle with white number:
Auxiliary marking for a better understanding.
White circle with black number: Position or assembly group with reference
to the parts list and to the graphics within a chapter.
White circle with black letters: Assembly group with reference to the parts
list and to the graphics within a chapter.
1.3.3 Designations
This documentation uses the following designations:
Table 4: Designations
Designation Meaning
SB24-M Control valve with mechanical control
SB24-EHS/SB34-EHS Control valve with CAN bus-controlled electrohydraulic actuating unit
EHR24-EHS Control valve with CAN bus-controlled electrohydraulic actuating unit for
electrohydraulic hitch control
EHR24-EM2 Control valve with PWM signal-controlled electrohydraulic hitch control
Control valve Directional valve type SB
Control valve Directional valve type EHR
Control spool Main spool
actuation Type of control spool actuation

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1.3.4 Abbreviations
This documentation uses the following abbreviations:
Table 5: Abbreviations
Abbreviation Meaning
AP Connecting plate
CAN Controller Area Network
CVL Connection valve (with LS signaling direction from right to left)
da Double-acting
PRV Pressure relief valve
DIN German Industrial Standard
DMV Pressure reducing valve
EHR Electrohydraulic hitch control
EHS Electrohydraulic actuating unit
EVL End valve (with LS signaling direction from right to left)
EP End plate
IPC Individual pressure compensator
ISO International Organization for Standardization
PWM Pulse width modulation
RV Non-return valve
sa Single-acting
SPV Check valve
ZAP Central connecting plate
ZP Intermediate plate

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2 Safety instructions
2.1 About this chapter
The product has been manufactured in accordance with generally accepted
engineering standards. There is still, however, a risk of personal injury or property
damage if this chapter and the safety instructions in this documentation are
notobserved.
▶ Read this documentation completely and thoroughly before working with the
product.
▶ Keep it in a location where it is accessible to all users at all times.
▶ Always include the required documentation when passing the product on to
thirdparties.
2.2 Intended use
Control blocks/control block segments are hydraulic components, meaning that in
their application area they are classified neither as complete nor as partly completed
machinery as defined in the EC Machinery Directive2006/42/EC. The component
is exclusively intended to form partly completed machinery or complete machinery
together with other components. The component may only be commissioned after it
has been installed in the machine for which it is intended and the safety of the entire
system has been established in accordance with the machinery directive.
The control blocks/control block segments have been developed for applications
in the working hydraulics of agricultural machinery. Deviating use is only permitted
following consultation with BoschRexroth.
▶ Observe the technical data, the application and operating conditions and the
performance limits as specified in the data sheet and in the order confirmation.
Information about approved hydraulic fluids can be found in the corresponding
datasheet.
Intended use includes having completely read and understood this documentation
and particularly chapter2 "Safety instructions" on page9.

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2.3 Improper use
Any use other than that described as intended use is considered improper.
BoschRexrothAG is not liable for damages resulting from improper use. The user
issolely responsible for any risks arising from improper use.
The following foreseeable forms of faulty usage are also considered improper
(thislist is not exhaustive):
• Use outside the operating parameters approved in the data sheet or in the order
confirmation (unless specifically approved by the customer)
• Use of non-approved fluids, e.g., water or polyurethane components
• Application of the control block/control block segment in potentially explosive
environments
2.4 Personnel qualifications
The activities described in this documentation require a basic understanding of
mechanics, electricity and hydraulics, as well as familiarity with associated technical
terms. For transporting and handling the product, knowledge regarding the use of
lifting gear and lifting accessories is required. Skilled personnel refers to persons
who possess the professional training, knowledge and experience, as well as the
understanding of the regulations relevant to the work to be done that are necessary
to recognize possible dangers and take the appropriate safety measures. Skilled
personnel must follow the rules relevant to their field and have the necessary
hydraulic expert knowledge.
Hydraulic expert knowledge includes:
• Being able to read and fully understand hydraulic circuit diagrams and
• Knowledge regarding the function and interaction of hydraulic components.
Bosch Rexroth offers you measures supporting training in specific areas. For an
overview of the training contents, visit our website under:
www.boschrexroth.com/training
2.5 General safety instructions
• Observe applicable accident prevention and environmental protection regulations.
• Observe the safety regulations of the country in which the product is
used/operated.
• For Germany, the following applies: Hydraulic machinery/systems are "facilities for
handling substances hazardous to water in accordance with the German Federal
Water Act (WHG)". Sections1 and 19 WHG (§19g, 19i, 19l) in particular must be
complied with in this respect.
• Use Rexroth products only when they are in good working order.
• Do not install, operate, remove or maintain Rexroth products if under the influence
of alcohol, drugs or medication that may affect your reaction time.