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| Unscrew plug for inspecting gear oil -arrow-. |
| The oil is at the correct level if the gear is filled up to the lower edge of the oil filler hole. |
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| Screw in screw -arrow- using a new sealing ring and tighten to tightening torque → Chapter. |

Note | For gearboxes as of gearbox manufacturing date 08 01 6 the oil filler plugs and oil drain plugs are installed with thread M22 x 1.5 mm. The gasket ring is no longer applicable for these screws. Assign components via → Electronic Catalogue of Original Parts. |
| If re-filling, do the following: |
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| Pour in gear oil up to lower edge of filler hole. |
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| Screw in screw -arrow- using a new sealing ring and tighten to tightening torque → Chapter. |

Note | For gearboxes as of gearbox manufacturing date 08 01 6 the oil filler plugs and oil drain plugs are installed with thread M22 x 1.5 mm. The gasket ring is no longer applicable for these screws. Assign components via → Electronic Catalogue of Original Parts. |
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| Install the noise insulation. |
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