I seldom move the selector as I rarely weld aluminum. The selector has never crisply "clicked home" as I would like to see a switch of this type do. Some wiggle will make it happy at EP and at EN, but it seems to get lost looking for AC (which is the middle setting)
I need to open the case, blow it out & clean & set the points.
Any ideas relating to the problem? Tuner spray? Electrical contact lubricant? Working the switch back & forth to limber it up?
There is a lot of "slop" between the handle and switch shaft and it also feels like there may be some within the switch internally. Curiously, there is a "shear pin" sort of cotter key like pin which fastens the handle to the switch shaft that accounts for a lot of the looseness. If I didn't know better I'd say it was a shear pin. It may, in fact, be one as it seems that you could shear it with just a little effort. Almost even money tells me this is a protective mechanism. Does this have anything to do with anything? ---dumb question, I know but it's either this way for a purpose or really lousy engineering.
Any help or suggestions would be appreciated.