Siemens Flender FLUDEX 4600 Series Operating Instructions Manual page 22

The quantity to be put into the coupling is determined in accordance with the order.
The filling quantity in litres is stamped on the coupling and specified on the
order­related title page.
Marking lines with litre quantities have
been cast in raised relief on the coupling
housing to assist filling the coupling and
checking the filling level.
When filling and/or checking the filling level
the mark with the required filling quantity
(in case of intermediate values the
corresponding intermediate position) must
be turned to the top position (12 o'clock).
In case of filling above the filling plug (153)
the coupling is filled with the required
quantity, if the filling level has reached the
lip of the hole for the screw plug (163).
After filling tighten filling plug (153) and screw plug (163) / fusible safety plug (103) (for tightening torques,
see section 6, item 6.6) and check coupling for leaktightness by carrying out a short test run. This may be
done by holding a clean piece of paper parallel to the turning axis and close to the rotating surface envelope
of the coupling. Any operating fluid spurting out will be visible on the paper.
FLUDEX couplings must not lose any operating fluid, as this loss may result in a rise
in slip and coupling temperature and ultimately to a fusing of the fusible safety
plug (103).
Then finally fit the clutch guard to prevent unintentional contact.
Faults in the drive (e.g. locking of the output side) may result in the coupling overheating. If the fusing
temperature of the fusible safety plug is reached, the insert will melt and the hot operating fluid (oil, water)
escape. The coupling protection must therefore be so designed as to also guarantee protection against
operating fluid spurting out without appreciably impairing the ventilation of the coupling. The fusible safety
plugs (103) and the filling plugs (153) should be accessible.
Rotating parts must be secured by the purchaser
against accidental contact. The coupling protection
must also protect against spurting hot operating
fluid without appreciably impairing ventilation
(see also information on the coupling).
If it is to be used below ground in potentially explosive areas, the coupling, which is
made of aluminium, must be provided with a robust casing to preclude the risk of
ignition from e.g. friction, impact or friction sparks.
The depositing of heavy metal oxides (rust) on the coupling housing must be
precluded by the casing or other suitable precautions.
Couplings to be used in potentially explosive areas are designed with the fusible
safety plugs (103) permitted for the temperature class. The coupling is marked with
the temperature class of the fusible safety plug (103).
It must be ensured that the drive shuts off not later than 5 minutes after the fusible
safety plug (103) is fused.
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Screw plug (163) or
Fusible safety plug (103)
Fusible safety plug (103)
Filling plug (153)
maximum filling level
FLUDEX 4600 en
Operating instructions 10/2017