Siemens SINAMICS G115D

12.3.26 Checking the gearbox for leaks
Note
Due to the inherent principle of operation, oil mist can escape from a breather valve or labyrinth
seal.
Oil or grease escaping in small quantities from the shaft sealing ring should be regarded as
normal during the running-in phase of 24hours operating time.
If the quantities escaping are signi󹪝cant or leaking continues after the running-in phase, the
shaft sealing ring must be replaced to prevent consequential damage.
Table 12-47 Description and measures
Status Description Measures Notes
Film of moisture
on the shaft seal‐
ing ring
Film of moisture as a re‐
sult of the inherent prin‐
ciple of operation (appa‐
rent leakage)
Remove using a clean
cloth and continue to
observe.
This does not represent a
fault; frequently, in the
course of operation, the seal‐
ing ring dries o󹪜.
Leakage at the
shaft sealing ring
Identi󹪝able small trickle,
formation of drops, also
after the running-in
phase
Replace the sealing ring,
determine the possible
cause of the sealing ring
failure and rectify.
During the run-in period, the
shaft sealing ring beds into
the shaft. A visible track can
be seen on the shaft. Opti‐
mum preconditions for a per‐
fect seal are obtained after
the run-in period.
12.3.27 Replacing the vent valve
To ensure correct functioning, renew the breather valve yearly.
When replacing, prevent dirt and damaging atmospheres from entering the gearbox.
If too much oil is contained in the gearbox, oil will escape from the breather valve. Correct
the oil quantity and replace the breather valve.
12.3.28 Checking the oil level sensor (optional)
The oil level sensor indicates the oil level only when the gearbox is shut down.
Lower the oil level and 󹪝ll it up again until the oil level sensor gives a switching signal.
Please refer to the separate operating instructions for the oil level sensor.
Additional information on the SIMOGEAR geared motor
12.3Speci󹪝c data gearbox
SINAMICS G115D Wall Mounted distributed drive
Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA 525