BA 9137 en 12/2015
7.1.4
Flushing before initial start-up
In general, it must be differentiated between flushing prior to the initial start-up and flushing before or after
repairs and maintenance work (see item 10.4 "Flushing").
Flushing before initial start-up serves to minimise residues from previous lubricating oils or preservative
agents.
Flushing should be carried out with the selected service lubricating oil. Lower viscosities (e.g. VG 46 or
VG 100) of oil of the same grade and brand as that one used as operating lubricating oil may also be used
as flushing oil.
•
Put in flushing oil. For flushing, the gear unit and/or the tank of the oil-supply system must be filled with
sufficient oil, so that the oil pump of the oil-supply system can be operated for flushing (see item 7.1.4.1
"Oil quantity for flushing").
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Flushing times:
For flushing, operate the oil pump of the low-pressure lubricating circuit for at least 6 hours.
If a high-pressure lubrication circuit is present, it must be switched on after 2 minutes.
NOTICE
Property damage
Damage to the gear unit and the oil-supply system is possible from
soiling of the oil.
After flushing, the oil must be carefully drained off through the oil drain cocks (see Figure 7 in item 7.1.3)
on the gear unit and the oil-supply system. It may be re-used only as flushing oil. Clean the flushing oil
before re-use. The flushing oil must be filtered beforehand or during filling using a nominal filter mesh
of 25 μm (0.0010 inch).
The flushing oil can be reused for a maximum of six flushing operations.
7.1.4.1 Oil quantity for flushing
For flushing, the gear unit and/or the tank of the oil-supply system must be filled with sufficient oil, so that
the oil pump of the oil-supply system can be operated for flushing, without air being aspired. The flushing
oil quantity may be up to 100 % of the total oil filling required for operations, depending on the gear unit
model. On the delivery of the gear unit, the connecting pipework, and the oil-supply system by Siemens,
the total oil filling quantity can be found in the technical data of the order-specific gear unit documentation.
7.1.5
Fill in operating oil
Data, such as oil type and oil viscosity can be found in the order-specific "Technical data". The total
operating oil quantity for the gear unit, the oil-supply system, and the pipework can be found in the set-up
plan.
If the oil-supply system and the pipework are not included in the scope of delivery by Siemens, the
operating oil quantity for the gear unit is shown on the rating plate (see section 1. "Technical data").
