20/30
Bosch Rexroth AG
30, 50, 80 NFF2 | RE 51433-B/04.10
Maintenance and repair
Wear parts
Table 3:
Wear part
Material number
Main filter element
Rating see name plate
Protective pump filter
Rating see name plate
For the addresses of foreign subsidiary please refer to
www.boschrexroth.com and chapter "16.1 Address directory".
Exchanging the suction filter (protective pump filter)
9.4
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 bowl (3) and pull the filter element (2) off the centering
f
spigot on the filter head (1).
Replace the filter element by putting the new filter element onto the centering
f
spigot (it may be necessary to remove the protective foil in advance).
Screw on the filter bowl again and fasten it hand-tight (fig. 7).
f
Protective pump filter set-up
Fig. 7:
Filter head
1
Filter element
2
Filter bowl
3
Exchanging the filter element
9.5
During operation, the pressure differential is monitored at the maintenance indica-
tor at the main filter. If the pressure differential exceeds the value of 2.5 bar, the
pressure resistance in the suction line is too high.
This may be due to the following causes:
Plugged pipe socket and/or plugged suction line;
•
Oil viscosity too high / oil temperature too low;
•
Contaminated filter.
•
