after i cleaned mine up ( of rust ) it rusted up again if i read correctly it was coated with a special coating , Zinc i think so once you clean it , it will probably rust up again .... unless you paint it with something ( haven't found anything yet) but looking toward something like brass lacquer or staybryte type of spray on paint.
one thing that needs grease is the acme nut/bushing thats inside the arm shaft. so once its apart.... grease it up good.
on a model v76-5 ok the block starting from the magnet wheel
little green , little orange , big white , big red
the big white , big red can be reversed and it will go in the other direction so if big white , big red get you west when you press the east button then reversing them will get east when you press east button.