Cal Haines
Diamond
- Joined
- Sep 19, 2002
- Location
- Tucson, AZ
I've never figured out the purpose of that hole. I don't think that they would continue to drill the hole if it served no purpose, yet all machines with versions of that of base (which include piggyback-exciter round-dials, right through WiAD square-dials) seem to have it. Maybe it's a tooling hole, used during manufacturing? You definitely want to plug it, since oil can get from the drain pan area to that hole and drip into the motor compartment.... It seems there is one small hole towards where the gearbox would go, that doesn’t belong?
View attachment 370986
Cal