My Shimano rear derailleur was destroyed, for some reason got into the rear wheel, so I had to buy a new one. Hanger was a little misaligned but I think I fixed it.
I bought the new derailleur, changed cable and housing, the chain was pretty new.
All installed, checked L and H, and I noticed the derailleur was a little close to the cogs. but worked fine in all the 6 smaller cogs.
When I try to go into the biggest cog, no matter the B screw, the sprocket is touching the cogs (with the chain in between) making a weird noise and sometimes it cannot even get up there.
The first derailleur was a Shimano TY500 6-7 speed. I ordered another one, a Shimano Tourney RD-TY300 6/7-Speed but is doing the same thing!
The rear cassette has a biggest cog of 34T