So you are adjusting the latch.. I thought in the manual it had something on the hinge?
I don't see the latches in my manual. & looking at a few V63's in my storage unit, I don't see any way to adjust them at all, ( they are fixed in place) I have had to replace the bottom door pivot/socket on many machines as they tend to wear & crack & then the door will start to "bow-out" at the bottom.
If you need to remove the main door off of a Vendo square cornered V56/81/63/90/126 etc. be darn careful when you remove the top pivot not to let the doors top "tip" or you will crack the bottom pivot socket every time. ( it's only cast zinc)