Notes

Check that the following conditions have been met:

• Perform the oil change immediately after you have switched off the gear unit to prevent solids from settling. If possible, you should drain the oil while it is still warm. Avoid oil temperatures above 50 °C.

• The oil grade and oil viscosity are listed on the nameplate of the gear unit.

• Always fill the gear unit with the same oil grade that was used before. Mixing oils of different grades and/or manufacturers is not permitted. In particular, synthetic oils must not be mixed with mineral oils or other synthetic oils. When switching from mineral oil to synthetic oil and/or from synthetic oil of a certain basis to synthetic oil of a different basis, you must flush the gear unit thoroughly with the new oil grade.
• Refer to the lubricant table for information about the permitted oils of the various lubricant manufacturers.

• When changing the oil, flush the interior of the gear unit thoroughly with oil to remove oil sludge, wear debris, and oil residues. Use the same oil grade that is used for operating the gear unit. Fill in the fresh oil only after all residues have been removed.

• An oil level above the max. marking can indicate that foreign liquids (e.g. water) have entered. An oil level below the min. marking can indicate a leakage. Find out and eliminate the cause before you fill in new oil.

• Replace any damaged gaskets of the oil drain plug.

• When additional attachments, e.g. an oil supply system, are mounted to the gear unit, the oil fill quantity is higher. Observe the operating instructions of the oil supply system.

• Empty the oil-bearing system of gear units with oil cooling system and oil supply system according to the manufacturer's maintenance instructions. If required, empty accessories such as oil filters and pipes.

• For gear units with reduced oil level, observe chapter Gear units with reduced oil level.