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Pressure and flow control system SYDFE1 series 2X, 3X
| Decommissioning
Bosch Rexroth AG, Edition 10.2021, RE 30011-B
To replace the pre-load valve, loosen the mounting screws and remove the pre-
load valve.
Mounting screws
Fig. 34: Mounting bores: left-hand side (round) for NG 18, 28, 25; right-hand side (rectangular)
for NG 71, 100, 140
When mounting a new pre-load valve, take care that the seal on the pump side of
the pre-load valve is positioned in the recess provided for this purpose. Tighten
the mounting screws to the following torque:
Sizes 18, 28 and 45:
45 Nm
Size 71:
55 Nm
Sizes 100, 140 and 180:
100 Nm
After having mounted the pre-load valve, connect the high pressure and case drain
oil pipes as described in chapter 7.3 “Installation positions and piping of SYDFE1
systems” on page 43. During re-commissioning, bleed the pre-load valve. Notes
on the bleeding procedure can be found in chapter 8.1.8 “Bleeding the pre-load
valve“ on page 67.
11 Decommissioning
The SYDFE 1 control system is a component that does not require
decommissioning. For this reason, this chapter of the present instructions does
not contain any information.
For details about how to demount or replace your SYDFE1 control system, please
refer to the following chapter 12 “Demounting and replacement”,
Pre-load valve SYDZ0001
