Bosch Rexroth 50 NFF2 Operating Instructions Manual page 21

RE 51433-B/04.10 | 30, 50, 80 NFF2
CAUTION!
Risk of cavitation!
Cavitation leads to early pump wear. Symptoms of cavitation include knocking
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sound in the pump and/or excessive vibrations of the entire unit.
Remedy the cause for the excessive pressure resistance in the suction line.
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Clear a plugged pipe socket and/or a plugged suction line from the plugging.
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If the oil viscosity is too high or the oil temperature is too low, the operating con-
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ditions (chapter "15 Technical data") have not been complied with. In this case,
precautions have to be taken in order to comply with the operating conditions.
Renew or clean a contaminated filter.
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Switch off the off-line filter system at the on/off switch and separate the off-line
filter system from the voltage supply.
Unscrew the filter head (1) and take the filter element (2) out of the filter
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housing (3).
Replace the filter element by installing the new filter element (it may be neces-
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sary to remove the protective foil in advance).
Screw on the filter bowl again and fasten it hand-tight (fig. 8).
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Fig. 8: Main filter set-up
1 Filter head
2 Filter element
3 Filter housing
Bosch Rexroth AG 21/30