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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 off 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 flexible 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 Changing the oil (Page 57).
You have now checked the oil quality.
10.2.5
Changing the oil
10.2.5.1
General safety notes for changing the oil
NOTICE
Impermissible mixing of oils leads to damage
Impermissible mixing of oils leads to:
• Darkening
• Sediment
• Foam formation
• Change of the viscosity or reduced corrosion protection
• Wear protection.
When changing oil of the same type, the residual volume of oil in the gearbox should be kept
as low as possible. Generally speaking, a small residual volume will cause no particular
problems.
Gear oils of different types and by different manufacturers must not be mixed. Have the
manufacturer confirm that the new oil is compatible with the remaining volume of used oil.
If very different types of oil or oils with very different additives are changed, always flush out
the gearbox with the new oil. When changing from mineral oil to polyglycol oil (PG) or vice
versa, it is vital to flush the gearbox twice. All traces of old oil must be completely removed from
the gearbox.
SIMOGEAR electric monorail gearbox
Operating Instructions, 01/2024, A5E53220855A/RS-AA
Service and maintenance
10.2 Checking and changing lubricants
57
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