BA 9137 en 12/2015
7.3.1.3 Renewal of the gear unit interior preservation through complete filling with preservative or operating oil
A further possibility for prolonging the gear unit interior preservation is to fill the gear unit with preservative
or operating oil until the oil level indicator on the tilting pad thrust bearing chamber shows it is filled
completely with oil.
The durability of this kind of preservation depends on the used oil and has to be enquired with the oil
manufacturer.
For the complete filling, a sealing cap (can be obtained from Siemens) must be mounted on the gear unit
for sealing the input shaft.
The preservation will remain intact for as long as the gear unit remains sealed and the storage durability
of the oil is not exceeded.
Note
Oil already filled in must be drained as described in Section 10. "Maintenance and repair".
Note
Refer to the BA 7300 operating instructions supplied separately for the approved preservative oils. The
viscosity of the operating oil is stated on the rating plate.
For better filling, it is recommended to choose an oil with low viscosity, which however is not suitable
for later operation of the gear unit. This oil must be drained completely.
It is recommended to use the later operating oil for the complete filling and to drain the oil before start-up
until the operating oil level is reached.
NOTICE
Property damage
Corrosion damages on the gear unit possible from the loss of the preservative effect.
Filled gear units can become untight and the gear unit oil might escape. Monitor the tightness of the
filled gear units. Repair leaks. Siemens does not accept any liability for damages that are caused from
leaking gear unit oil during storage.
The following procedure is recommended:
•
Seal input shaft with a sealing cap (3).
•
Seal bottom oil drain of the sealing cap with a screw plug (2).
•
Seal the oil drain cock of the tilting pad thrust bearing chamber (10) with a screw plug.
•
Seal the pressure, suction and/or return lines (6,8,9) with blind flanges.
•
Seal and mask labyrinth seal on the output flange airtight with a round cord hollow profile (13).
•
Replace the air filters of the gear unit (4) with screw plugs
(at start-up, the screw plugs must be replaced for the air filters again).
•
The oil to be put in must be filtered beforehand with a filter mesh of 25 μm (0.0010 inch).
•
Fill sealing cap on the input shaft through the ventilation of the sealing cap (1).
Close the ventilation (1) only once the oil filling of the gear unit is completed, unless oil is escaping from
this opening before then.
•
The gear unit must be filled with oil through the bottom oil drain cock of the gear unit (7).
•
The gear unit will be filled completely only when the oil level indicator on the tilting pad thrust bearing
chamber (12) is filled completely with oil.
