Bosch rexroth SB11 User manual

RE 66177-10-R/2021-11-16, EN
Load-sensing control
block in sandwich plate
design
SB11
Assembly instructions
10-R

©BoschRexrothAG2021. 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 repair manual was created in the
German language.

RE 66177-10-R/2021-11-16, Bosch Rexroth AG
Contents | Load-sensing control block SB11 3/18
1 About this documentation ������������������������������������������������������������������������ 4
1.1 Validity of the documentation ...................................................................... 4
1.2 Required and supplementary documentation............................................... 4
1.3 Representation of information...................................................................... 5
1.3.1 Symbols ....................................................................................................... 5
1.3.2 Designations ................................................................................................ 5
1.3.3 Abbreviations ............................................................................................... 5
2 Safety instructions ����������������������������������������������������������������������������������� 6
3 General instructions on property damage and product damage���������������� 6
4 About these products ������������������������������������������������������������������������������� 7
4.1 Overview of control block segments ............................................................ 7
4.2 Tie rod bores and threads ............................................................................ 8
4.3 Tie rod and nut............................................................................................. 8
4.4 Configuring the control block....................................................................... 9
4.5 Alignment of the control block on the working surface ................................ 9
5 Assembly description����������������������������������������������������������������������������� 10
5.1 Control block assembly.............................................................................. 10
5.1.1 Preparation of the block segments for the assembly.................................. 10
5.1.2 Assembly, connecting plate .................................................................... 11
5.1.3 Assembly, directional valve section .................................................................. 11
5.1.4 Assembly, directional valve section and ............................................. 12
5.1.5 Assembly, end plate / end valve ........................................................ 12
5.2 Control block disassembly ......................................................................... 13
5.2.1 Preparation for disassembly....................................................................... 13
5.2.2 Disassembly, end plate / end valve .................................................... 13
5.2.3 Disassembly, directional valve section , and ................................... 14
5.2.4 Disassembly, connecting plate ............................................................... 14
6 Repairing the flange surface������������������������������������������������������������������� 15
6.1 Sealing elements for control block segments............................................. 15
6.2 Repairing the shuttle valve......................................................................... 16
Contents

4/18 Load-sensing control block SB11 | About this documentation
Bosch Rexroth AG, RE 66177-10-R/2021-11-16
1 About this documentation
1�1 Validity of the documentation
This documentation applies to load-sensing control blocks SB11 of BoschRexroth
including the following control block segments:
• Connecting plate, end plate
• Control valves SB11-EHS4
• Hitch control valves EHR11-EHS4
▶ Read this documentation completely and, in particular, the chapter 2
"Safety instructions" and the chapter 3 "General instructions on property and
product damage" in the related instruction manual 66177-B before you start
working with the product.
1�2 Required and supplementary documentation
▶ Only commission the product if the documentation marked with the
booksymbol is available to you and you have understood and observed it.
Table 1: Required and supplementary documentation
Title Document number Document type
Load-sensing control block SB11
Contains important information on the safe and proper transport, installation,
commissioning, maintenance and removal of the SB11 control block.
66177-B Instruction manual
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 SB11 66177
Load-sensing directional valves in sandwich plate design SB11-EHS4 66176
Plates for load-sensing control block in sandwich plate design SB11 66181
Hitch control valves EHR 66126
For related documentation on the assembly and repair, please refer to the
above-mentioned manual and, if necessary, to
www.boschrexroth.com/mobile-hydraulics-catalog.

RE 66177-10-R/2021-11-16, Bosch Rexroth AG
About this documentation | Load-sensing control block SB11 5/18
1�3 Representation of information
Uniform 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 Symbols
The following symbols indicate notices that are not safety-relevant but increase
understanding of the documentation.
Table 2: 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�2 Designations
This documentation uses the following designations:
Table 3: Designations
Designation Meaning
SB11-EHS4 Control valve with pilot operated electro-hydraulic actuating unit
EHR11-EHS4 Control valve with CAN bus-controlled electro-hydraulic actuating unit
for electrohydraulic hitch control
Control valve Directional valve type SB
Hitch control valve Directional valve type EHR
1�3�3 Abbreviations
This documentation uses the following abbreviations:
Table 4: Abbreviations
Abbreviation Meaning
AP Connecting plate
EHR Electrohydraulic hitch control
EHS Electro-hydraulic actuating unit
EVR End valve (with LS signaling direction from left to right)
EP End plate
SVR Standard valve (with LS signaling direction from left to right)

6/18 Load-sensing control block SB11 | Safety instructions
Bosch Rexroth AG, RE 66177-10-R/2021-11-16
2 Safety instructions
▶ Always follow all safety instructions in the instruction manual 66177-B.
3 General instructions on property
damage and product damage
▶ Always follow all instructions in the instruction manual 66177-B.
• Rexroth original spare parts may be used only.
• Replace elastic sealing elements after disassembly.
• The housing and parts must be clean and undamaged.
• Damaged housings and parts may not be used again.
• Reworking threads is not permissible.
• Reworking bores is not permissible.
• Protect bores and threads from any deposition of dirt.
• During disassembly, adhesion forces might take an effect between the
flange surfaces.
• Remove any contamination with awhetstone and clean it with acleaning cloth.
• Surfaces with imprints or signs of wear in the sealing surface may not be
continued to be used.
• Reworking sealing surfaces is not permissible.
• Use protective jaws with hard rubber. Sealing and flange surfaces may not be
damaged.
• Oil-soaked cleaning cloth
• Whetstone
• Mechanical tools
• Torque wrench
Housing and parts
Flange surfaces and
sealing surfaces
Bench vise
Required tools

RE 66177-10-R/2021-11-16, Bosch Rexroth AG
About these products | Load-sensing control block SB11 7/18
4 About these products
The appearance of the individual control block segments may vary.
4�1 Overview of control block segments
Plates
▲ End plate (EP) ▲ Connecting plate (AP)
Directional valves
▲ End valve (EVR) ▲ Standard valve (SVR) ▲ Hitch control valve EHR11-EHS4

8/18 Load-sensing control block SB11 | About these products
Bosch Rexroth AG, RE 66177-10-R/2021-11-16
4�2 Tie rod bores and threads
The control block segments are clamped together by means of tie rods and nuts.
For this purpose, the control block is provided with threaded bores at one
control block segment and the following control block segments are provided with
through bores in the flange surfaces.
At the final control block segment, the tie rods protrude at the end surface.
On the protrusion, the tie rod nuts are located.
Example:
Bore Bore Bore Bore Thread
Nut EP / EVR SVR SVR SVR AP
4�3 Tie rod and nut
Tie rods used by BoschRexroth are symmetrical, differentiation of the thread
ends is not necessary.
▶ Use tie rods M8 × length, property class 10.9.
▶ The required tie rod length depends on the number and combination of the
control block segments.
▶ In the mounted condition, the tie rod must have aminimum protrusion over the
nut of 3mm.
▶ Use nuts according to ISO4032 – M8, property class 10.9.
NOTICE! The tie rods must not be deformed during assembly/disassembly of the
control block segments!

RE 66177-10-R/2021-11-16, Bosch Rexroth AG
About these products | Load-sensing control block SB11 9/18
4�4 Configuring the control block
1� Determine the desired order of the block segments (see chapter 4.2),
e.g. starting with the connecting plate.
2� Determine the tie rod length (see chapter 4.3).
4�5 Alignment of the control block on the working surface
The control block segments can be assembled / disassembled horizontally or
vertically.
▲ Vertical assembly ▲ Horizontal assembly
In case of horizontal assembly, the height difference of the individual block
segments should be compensated with asuitable underlayer from the fifth
control block segment in order to ensure safe orientation of the control block
segments to each other.
▲ Compensating height differences

10/18 Load-sensing control block SB11 | Assembly description
Bosch Rexroth AG, RE 66177-10-R/2021-11-16
5 Assembly description
The assembly / disassembly is described using acontrol block with 5 block
segments as example. The appearance of the individual control block segments
may vary.
Table 5: Control block segments
Position Designation Abbreviation
Connecting plate AP
Directional valve EHR SVR
, Directional valve SB SVR
End plate EP
End valve EVR
▲ Example with end plate ▲ Example with end valve
5�1 Control block assembly
5�1�1 Preparation of the block segments for the assembly
Prepare the flange surface O-ring side of the block segments as follows:
1� Block segments with shuttle valve:
Assemble the shuttle valve according to chapter 6.2
"Repairing the shuttle valve".
2� Assemble the sealing elements according to chapter 6.1 "Sealing elements for
control block segments".

RE 66177-10-R/2021-11-16, Bosch Rexroth AG
Assembly description | Load-sensing control block SB11 11/18
5�1�2 Assembly, connecting plate
1� Manually screw-in the three tie rod screws ... with the thread side
into the tie rod thread bores ... of the connecting plate in aclockwise
direction and tighten them. Tightening torque MA=25.5+2.5Nm
5�1�3 Assembly, directional valve section
▶ Orientate the control block segment with the flange surface of the opposite
O-ring side to the connecting plate and slide it via the tie rod screws ...
to the stop at the connecting plate .

12/18 Load-sensing control block SB11 | Assembly description
Bosch Rexroth AG, RE 66177-10-R/2021-11-16
5�1�4 Assembly, directional valve section and
▶ Orientate the control block segments , with the flange surface of the
opposite O-ring side to the already mounted control block segment and slide on
one after the other via the tie rod screws ... to the stop.
5�1�5 Assembly, end plate / end valve
1� Orientate the end plate / end valve with the flange surface of the
opposite O-ring side to the already mounted control block segment and slide
on via the tie rod screws ... to the stop.
2� Screw the nuts onto the tie rods ... without using any washers or
locking washers.

RE 66177-10-R/2021-11-16, Bosch Rexroth AG
Assembly description | Load-sensing control block SB11 13/18
3� Align the control block segments to each other and pre-tension the nuts
in the order with atorque of approx. 5+1 Nm.
4� Tighten the nuts in the order .
Tightening torque MA=25.5+2.5Nm
5�2 Control block disassembly
5�2�1 Preparation for disassembly
▶ Dismount the control block according to the parameters provided by the
machine manufacturer and place it on aclean and stable underlayer.
▶ The sealing and flange surfaces must not be damaged.
▶ The control block segments are to be numbered individually.
5�2�2 Disassembly, end plate / end valve
1� Loosen the nuts by turning them counterclockwise and remove them from
the tie rods … .
2� Remove the end plate / end valve via the tie rods … without jamming.

14/18 Load-sensing control block SB11 | Assembly description
Bosch Rexroth AG, RE 66177-10-R/2021-11-16
5�2�3 Disassembly, directional valve section , and
▶ Remove the control block segments ,, one after another via the
tie rods … .
5�2�4 Disassembly, connecting plate
▶ Loosen the three tie rods … by turning them counterclockwise and unscrew
them from the connecting plate .

RE 66177-10-R/2021-11-16, Bosch Rexroth AG
Repairing the flange surface | Load-sensing control block SB11 15/18
6 Repairing the flange surface
6�1 Sealing elements for control block segments
Table 6: Sealing elements
Position Designation Use Dimension Quantity
O-ring Reservoir, return flow R18 × 2.5 1
O-ring Inlet P18 × 2.5 1
O-ring LS signal Y18 × 2.5 1
O-ring Pilot oil supply X9 × 2.5 1
O-ring Pilot oil return Rx 9 × 2.5 1
Table 7: O-ring thickness – Flange surface protrusion
O-ring Ød Protrusion X
1.5mm 0.3 to 0.4mm
2mm 0.4 to 0.5mm
2.5mm 0.5 to 0.7mm
3mm 0.6 to 0.9mm
1� Remove the O-rings from the ports P,R, Y, Rx and X.
2� Insert new O-rings into the ports P,R, Y, Rx and Xin the flange surface.
R
PY
Rx
X
▲ Flange surface
Control block segments with arecess for an O-ring for X(without continuous
bore through the valve housing) must also be equipped with O-rings.
Flange surfaces
O-ring protrusion
Disassembly/assembly,
sealing elements

16/18 Load-sensing control block SB11 | Repairing the flange surface
Bosch Rexroth AG, RE 66177-10-R/2021-11-16
6�2 Repairing the shuttle valve
Table 8: Parts list
Position Designation
Shuttle valve
O-ring
1� Remove the O-ring from port Y.
2� Remove the shuttle valve from port Y.
3� Align the shuttle valve with the spherical sealing cup to port Yand insert
without jamming.
4� Check the distance dimension 0.5mm from the flange surface of the control
block segment to the upper edge of the inserted shuttle valve.
5� Insert anew O-ring into port Y.
NOTICE! The shuttle valve must remain freely movable within the O-ring .
Disassembly/assembly,
shuttle valve

RE 66177-10-R/2021-11-16, Bosch Rexroth AG
| Load-sensing control block SB11 17/18

Subject to change
RE 66177-10-R/2021-11-16
BoschRexrothAG
Robert-Bosch-Straße 2
71701 Schwieberdingen
Germany
Service phone [phone]
[e-mail]
www.boschrexroth.com/eshop
Your local contact person can be found at:
https://addresses.boschrexroth.com