Yes, both legs are sealed from the lowers by a circlip. To do a 50hr service, undo both knuts, hit with mallet until loose, remove nuts, remove lowers, clean, clean foamrings, reinsert lowers (BUT DO NOT PUSH DOWN YET), inject 15wt oil 5-8ml / leg) into holes on bottom, then slide lowers on as far as they will go and reattach bottom bolts.
To lube the air spring, whilst lowers off use circlip pliers to remove snapring, then pull and wiggle air spring out. Lube this with suspension grease like float fluid or sram redrum or even just your 15wt oil. Rewiggle back in (careful of spacers) and put snapring back in.