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RE 66170-B/2019-05-15, Control block SB24/34, Bosch Rexroth AG
5.3 Product description
For a description of the layout and function of the control blocks and instructions on
configuring individual directional valves, refer to the data sheet.
For the assignments of directional valves to data sheets, refer to Table 1 "Required
and supplementary documentation" on page 5.
5.3.1 Definition of control block segments
Control blocks are parts of hydraulic systems for control of actuators like tractor
attachments.
The control block includes various control block segments in sandwich plate design.
The control block segments have various functions and are structured as follows:
The connecting plate is equipped with the LS signal output (port
Yo..
). The
connecting plates are usually fitted with tie rod screws to slide on the block
segments. The flange surface is always fitted with O-rings in the flange surface
(flange surface O-ring side).
Connecting plates with inlet port (
P..
) are further distinguished as follows.
• Connecting plate for fixed pump
• Connecting plate for variable pump
The tie rods are screwed on both sides into the central connecting plate on which
the block segments are slid.
The EHR control valve serves for electrohydraulic hitch control and is controlled via
PWM pilot signal or CAN bus in a circuit with electronic control unit and sensors.
The control block is completed by the end valve version of the EHR control valve with
LS signaling direction from right to left (EVL).
The SB24/34 control valve serves for control of various actuators and is controlled
mechanically or via CAN bus.
The control block is completed by the connection valve (CVL) version of the SB24/34
control valve. It is equipped with the LS signal output (port
Yo..
). The control block
is completed by the end valve version of the SB24/34 control valve with LS signaling
direction from right to left (EVL).
The intermediate plate does not have any hydraulic functions and serves as spacer.
The control block is completed by the end plate which can also have other functions.
The flange surface is never fitted with O-rings in the flange surface (flange surface
O-ring opposite side).
The SB24/34 control block segments illustrated below are described by means
of dummies. For a precise overview of all available combinations, refer to the
respective data sheet.
For the precise position and designation of external ports, refer to the data sheet
or the offer drawing.
Control block
Connecting plate
Central connecting plate
Control valve EHR24
Control valve SB24/34
Intermediate plate
End plate
