Maintenance
8.1 Maintenance intervals
56 Edition 09/2022 M4602-02en
Check the torsional backlash between the coupling parts at the specified maintenance inter-
vals. The maximum permissible torsional backlash for the various coupling sizes can be
found in section Maximum permissible torsional backlash (Page56).
Initial maintenance Follow-up maintenance
3 months after commissioning Every 12months
Table8-1: Maintenance intervals
Shorter maintenance intervals
If necessary, set shorter maintenance intervals depending on actual wear.
8.1.2 FLUDEX coupling8.1 Maintenance intervals
Operating fluid
Change the operating fluid at the specified maintenance intervals.
When changing the operating fluid, ensure that the old operating liquid is drained off com-
pletely. This is possible via the openings of the fusible safety plug (103) or via the opening of
the screw plug (163). Drain the residual oil from the prechamber via the screw plug (173).
Operating temperature/ Special
measures
maximum operating hours
of the operating fluid
maximum years of service
of the operating fluid
maximum 80°C 10000 5
maximum 95°C
or frequent temperature peaks above
100°C:
Use of Viton seals required
5000 2
over 95°C
only suitable synthetic oils are per-
missible
Use of Viton seals required
according to the specifica-
tions of the manufacturer of
the operating fluid
according to the specifica-
tions of the manufacturer of
the operating fluid
Table8-2: Operating temperatures, operating hours and years of use
In consultation with the manufacturer of the operating fluid, modified operating conditions
and change intervals are permissible.
Shaft sealing rings
For FLUDEX couplings operated with oil, no maintenance interval needs to be observed for
the shaft sealing rings.
8.2 Maximum permissible torsional backlash8.2 Maximum permissible torsional backlash
1. In order to calculate the torsional backlash, rotate one coupling part without applying
torque up to the stop.
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