Bosch Rexroth SB24/34 - 14.2 Malfunction Table

74/78 Troubleshooting
Bosch Rexroth AG, Control block SB24/34, RE 66170-B/2019-05-15
14.2 Malfunction table
Within the admissible operating conditions, no malfunctions occur at the control
block/control block segment.
Table 37: Malfunction table
Fault number
Fault
Origin and/or location of the fault Remedy
F1
Hydraulic fluid leaks from the
control block segment
Damaged sealing element Replace sealing element
Control block segment housing damaged Replace the control block segment
F2
Hydraulic fluid is leaking at the
supply line and/or port to the
control block segment
Sealing element damaged Replace sealing element
Pipe or hose lines damaged Replace pipe or hose lines
Loose pipe or hose lines Tighten the fittings
Control block segment housing damaged Replace the control block segment
F3
Hydraulic fluid is leaking between
the control block segments
Dirt or foreign particles Clean the flange surface
Sealing element damaged Replace sealing element
Loose tie rod screws Check the tightening torques
Damaged flange surface Replace the control block segment
F4
Fluctuations in pressure and flow
Pressure oscillations in the system Ventilate the control block segments
Ventilate the hydraulic system
Dirt or foreign particles in the control
blocksegment
Clean the inside of the control block segments
Ensure prescribed cleanliness of
hydraulicfluids
F5
Excessive temperature at the
control block segment
Excessive ambient temperature System-related/remedy by external measure
Hydraulic fluid temperature too high Lower hydraulic fluid temperature
Excessive flow Reduce flow
F10
No function
Control block segments connected incorrectly Correct hydraulic ports
Electric components connected incorrectly Correct electric ports
No hydraulic fluid Ensure hydraulic fluid supply
Dirt or foreign particles in the control
blocksegment
Clean the inside of the control block segments
Ensure prescribed cleanliness of
hydraulic fluids
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, exchange or additional installation of filters in addition to
carryingout repairs.