Hi,Jeff! on the '60 Viking 60,I could hear the vent,only when the brake pedal was first applied. I only heard it for a couple of seconds,even while stopped at a light,or waiting at an intersection. Measure the O.D.,of your breather tube,and see if you can match it to an oil breather,from an old tractor.(like an A.C.WD-45). The construction is the same. Maybe an ag-supply store may be able to order one?? Hope this helps!!
