Siemens SINAMICS G115D Operating Instructions Manual page 435

Faults
Oil leak at the
gearbox vent
Gearbox over-
heats.
Output shaft does
not turn when the
motor is running.
Geared motor only
starts with difficul-
ty or not at all.
Excessive play at
drive input and
output.
Speed and torque
drop.
SINAMICS G115D distributed drive
Operating Instructions, 09/2020, FW V4.7 SP13, A5E48681219B
Additional information on the SIMOGEAR geared motor
Causes
Overpressure due to lack of venting.
Overpressure due to soiled venting.
Shaft sealing rings defective.
Cover / flange bolts loose.
Surface sealing defective (e.g. on cov-
er, flange).
Damage in transit (e.g. hairline cracks). Check the gearbox for damage in trans-
Incorrect oil level for the mounting
position used and / or incorrect venting
position.
Frequent cold starts during which the
oil foams up.
Motor fan cover and / or gearbox very
dirty.
Incorrect oil level for the mounting
position being used.
Incorrect oil being used (e.g. incorrect
viscosity).
Oil is too old.
Excessive bearing play and / or bearing
defective.
Coolant temperature outside the per-
missible range.
Force flow interrupted by breakage in
gearbox.
Incorrect oil level for the mounting
position being used.
Incorrect oil being used (e.g. incorrect
viscosity).
Excessive external load on the drive
input and output.
Motor brake is not released.
Flexible elements worn (e.g. on cou-
plings).
Positive connection disrupted by over-
load.
Belt tension too low (for belt drive).
11.3 Specific data gearbox
Remedy
Mount the venting as appropriate for
the mounting position (Page 448).
Clean the venting (Page 446).
Replace the shaft sealing rings.
Checking the tightness of fastening
bolts (Page 447). Continue to monitor
the gearbox.
Reseal.
it.
Check the venting position, the mount-
ing position (Page 448) and the oil level
(Page 435).
Call Technical Support.
Clean the fan cover and surface of the
geared motor (Page 363).
Check the mounting position
(Page 448) and the oil level (Page 435).
Checking the oil quality (Page 438).
Check the date of last oil change. If
required, change the oil (Page 435).
Check the bearing and replace if neces-
sary.
Adjust the cooling air to the appropri-
ate temperature.
Call Technical Support.
Check the mounting position
(Page 448) and the oil level (Page 435).
Checking the oil quality (Page 438).
Check the load against rated data (you
might need to correct the belt tension,
for example).
Check circuit / connection of brake.
Check brake for wear and readjust if
necessary.
Replace flexible elements.
Call Technical Support.
Check the belt tension and replace belt
if necessary.
433