Our research with Shimano indicates that there are no Shimano Tourney 35 AD derailleurs.  However, the "Tourney"  and "35" lead us to about 30 Shimano derailleurs.  Eventually we matched photographs of the DJ Bikes derailleur with a Shimano-RD-FT35-A-SS.  There are 16 matching points of comparison between our photos and the information provided by Shimano. We provide an attachment showing this comparison.  As a result we were able to find a manual (DM-GN0001-24) showing how to maintain and adjust the derailleur.