Replace Bearings; Checking The Gearbox For Leaks; Replacing The Vent Valve; Checking The Oil Level Sensor (Optional) - Siemens SINAMICS G115D Operating Instructions Manual

Additional information on the SIMOGEAR geared motor
11.3 Specific data gearbox
11.3.25

Replace bearings

The bearing service life depends greatly on the operating conditions and so cannot be
calculated reliably. In the operating conditions specified by the operator, bearing life can be
calculated. If no information is given, changes in vibration and noise pattern can serve as an
indicator that an immediate bearing replacement is necessary.
11.3.26

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 significant or leaking continues after the running-in phase, the
shaft sealing ring must be replaced to prevent consequential damage.
Table 11- 49 Description and measures
Status
Film of moisture
on the shaft seal-
ing ring
Leakage at the
shaft sealing ring
11.3.27

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.
11.3.28

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 fill it up again until the oil level sensor gives a switching signal.
Please refer to the separate operating instructions for the oil level sensor.
446
Description
Film of moisture as a
result of the inherent
principle of operation
(apparent leakage)
Identifiable small trick-
le, formation of drops,
also after the running-
in phase
Operating Instructions, 09/2020, FW V4.7 SP13, A5E48681219B
Measures
Remove using a clean
cloth and continue to
observe.
Replace the sealing
ring, determine the
possible cause of the
sealing ring failure and
rectify.
Notes
This does not represent a
fault; frequently, in the
course of operation, the
sealing ring dries off.
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
perfect seal are obtained
after the run-in period.
SINAMICS G115D distributed drive