At the end of a running season fill the bearing completely to protect against moisture condensation. At start-up remove the grease fitting and allow surplus lubricant to run out during initial running. Oil and base will separate when working. Oil will oxidize and break down eventually. Contaminants become suspended in grease therefore making it necessary to lubricate and re-lubricate.
Adverse reaction can result.
This can lead to the mixture liquefying and oozing out of the bearing. Make sure grease fittings are accessible and cleaned before re-lubricating. Use clean grease. Do not store grease in open containers. Make sure grease is getting into the bearing.