Here is a cool PDF showing you picture by picture of how you can maintenance your winches. My bog strong Anderson whinches seems to go on without any new grease for years and years, whilde the smaller Barron’s need regreasing both spring and fall. Strange, but that is how it is.
I have had a hard time finding a usuful desrition on how to do maintenanace on self-tailing-winches. I found this on Practical Boat Owners webpage www.pbco.co.uk
I found it useful – good luck to you!