BA 9142 en 02/2015
10.4
Flushing
It must generally be distinguished between "flushing" during the initial start-up and "flushing before or after
repair work.
Flushing before or after repair work serves for removal of soiling (e.g. bon deposits, oil foam, abraded
material) and must be conducted depending on the scope of the repair.
Flushing should be carried out with the selected service lubricating oil. In general, lower viscosities
(e.g. VG 46 or VG 100) should be used for the flushing oil that is of the same brand as the oil type chosen
as the operating oil.
•
For flushing-oil quantity see item 7.1.4.1.
•
Flushing times:
For flushing, operate the oil pump of the low-pressure lubricating circuit for at least 6 hours.
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 8 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 6 flushing operations.
Note
If the oil tends to increasing foaming during flushing, we recommend having the oil analysed by the oil
supplier as to its suitability for use.
10.5
Oil filling
NOTICE
Property damage
Damage to the gear unit and oil-supply system is possible.
Fill the gear unit with oil after flushing and before the start-up of the gear unit.
Information on the type, viscosity and required quantity of the oil is given on the rating plate on the gear unit
and/or in the documentation included in the delivery.
The BA 7300 instructions manual relating to the gear unit lubrication and Table "T 7300" containing the
current lubricant recommendations of Siemens can also be consulted on the internet (see back cover).
