I am trying to disassemble a set of pedals to service them but I can't figure out what tool to use on the nut (see photo). I just need them temporarily until I can cycle to the bike co-op to change them, so if I can't get them apart, can I lubricate them somehow when they are still assembled so that they turn more easily? I have an aerosol grease I could just spray in.
Many thanks! Gill