After checking, screw the oil dipstick① in again hand-tight. The oil dipstick① can remain
screwed in during operation.
Correct the oil level and check it again.
12.3.24.5 Checking the oil quality
Visible signs show eects on the oil. Fresh oil is clear to the eye, and has a typical smell and a
specic product color. Clouding or a occulent appearance indicates water and/or
contamination. A dark or black color indicates residue, serious thermal decomposition or
contamination.
Follow the symbols in the diagrams of theMounting positions (Page527).
Venting Oil level
Procedure
1. Allow the geared motor to run for a short time. Wear and contaminant particles are visible in
the oil shortly after shutting down.
2. Switch o the power supply to the drive unit.
3. Unscrew the sealing element at one of the points marked with the symbols listed above.
4. Remove some oil, using a suction pump and a exible hose, for example.
5. Check the state of the sealing ring on the sealing element. If required, replace the sealing
ring.
6. Seal the gearbox with the sealing element.
7. Check the oil for abnormalities. Change the oil immediately if you determine any
abnormalities, as described in General safety notes for changing the oil (Page518).
You have now checked the oil quality.
Additional information on the SIMOGEAR geared motor
12.3Specic data gearbox
SINAMICS G115D Wall Mounted distributed drive
Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA 517