5 Service and maintenance
B 1000 en-2518 39
Information
Shaft sealing rings are rubbing seals and have sealing lips made from an elastomer material. These sealing lips
are lubricated with a special grease at the factory. This reduces the wear due to their function and ensures a long
service life. An oil film in the region of the rubbing sealing lip is therefore normal and is not due to leakage(please
see chapter 6.7 "Leakage and leak-tightness").
Check for running noises
If the gear unit produces unusual running noises and/or vibrations, this could indicate damage to the
gear unit. In this case the gear should be shut down and a general overhaul carried out.
Check the oil level
Section6.1 "Versions and maintenance"describes the mounting positions and the corresponding oil
level screws. With double gear units, the oil level must be checked on both units. The pressure vent
must be at the position marked in Section6.1 "Versions and maintenance".
The oil level does not need to be checked on gear units without oil level screw (please see chapter 6.1
"Versions and maintenance").
Gear unit types that are not supplied full of oil must be filled before the oil level is checked.
Check the oil level with an oil temperature of between 20 °C to 40 °C.
1. The oil level may only be checked when the gear unit is at a standstill and has cooled down. The
gear unit must be secured to prevent accidental activation.
2. The oil level screw corresponding to the actual mounting position must be screwed out(please see
chapter 6.1 "Versions and maintenance").
Information
At the first oil level check a small amount of oil may escape, as the oil level may be above the lower edge of the
oil level hole.
3. Gear units with oil level screw: The correct oil level is at the lower edge of the oil level hole. If the
oil level is too low, this must be corrected using the correct type of oil. An oil level glass is available
instead of the oil level screw
4. Gear units with an oil level tank: The oil level must be checked in the oil level tank with the aid of
the dipstick plug (thread G1 1/4). The oil level must be between the upper and lower marking when
the dipstick is fully screwed in (see Figure 22). Top up the oil level with the relevant type of oil as
necessary. These gearboxes may only be operated in the mounting position stated in Section 6.1
"Versions and maintenance".
5. The oil level screw or the cap screw with dipstick and all other loosened screws must be correctly
re-tightened.
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