More a mechanical question than an electrical one...
We have an Advent dish atop an (old!) satellite truck. There's a sensor in there that's failing intermittently, causing the controller to fault & forcing the operator to climb on top with a crank handle & manually crank up/down the dish.
We have a replacement sensor. To get at it, we have to unbolt the dish from the elevation axle.
Which has, unfortunately, proven impossible. There's at least one bolt that's seized. We can't get it to budge -- and having been under a fair amount of pressure to get it fixed, tried enough force to damage the corners. (it's an Allen-head bolt, probably #12 stainless)
We've tried WD-40. We've tried heating the assembly -- and cooling it. We've tried banging on it with a hammer. (in the hopes of breaking up whatever kind of corrosion might be in there binding it up) It's a flathead bolt, so a chisel is out of the question. (not that we'd be able to put it back together if we *did* use a chisel
I'm an absolutely useless mechanic, but some of our other guys aren't, and they haven't had any luck either.
Anyone have any other ideas?