Table of Contents
Table 17: Malfunction table
Fault number
Fault
F1
Hydraulic fluid leaks from the
control block segment
F2
Hydraulic fluid is leaking at the
supply line and/or port to the
control block segment
F3
Hydraulic fluid is leaking between
the control block segments
F4
Fluctuations in pressure and flow
F5
Excessive temperature at the
control block segment
F10
No function
Troubleshooting | Load-sensing control block SB11
14�2 Malfunction table
Within the permissible operating conditions, no malfunctions occur at the control
block/control block segment.
Origin and/or location of the fault
Damaged sealing element
Control block segment housing damaged
Sealing element damaged
Pipe or hose lines damaged
Loose pipe or hose lines
Control block segment housing damaged
Dirt or foreign particles
Sealing element damaged
Loose tie rod screws
Damaged flange surface
Pressure oscillations in the system
Dirt or foreign particles in the
control block segment
Excessive ambient temperature
Hydraulic fluid temperature too high
Excessive flow
Control block segments connected
incorrectly
Electric components connected incorrectly
No hydraulic fluid
Dirt or foreign particles in the control block
segment
In case of malfunctions caused by contamination, it is essential to check and
possibly improve the quality of the hydraulic fluid through appropriate measures,
such as purging, replacement or additional installation of filters in addition to
carrying out repairs.
Remedy
Replace sealing element
Replace the control block segment
Replace sealing element
Replace pipe or hose lines
Tighten the fittings
Replace the control block segment
Clean the flange surface
Replace sealing element
Check the tightening torques
Replace the control block segment
Ventilate the control block segments
Ventilate the hydraulic system
Clean the inside of the control block segments
Ensure prescribed cleanliness of
hydraulic fluids
System-related/remedy by external measure
Lower hydraulic fluid temperature
Reduce flow
Correct hydraulic ports
Correct electrical connections
Ensure hydraulic fluid supply
Clean the inside of the control block segments
Ensure prescribed cleanliness of hydraulic
fluids
RE 66177-B/2022-05-03, Bosch Rexroth AG
57/60
Table of Contents
