Well, I tried the screw extractor to no avail. Ended up drilling out the hole and re-tapping it to the original thread. The hole in the spindle bolt isn't blocked by the pulley. With the blade off the spindle assembly and everything else in place, giving a little spacing, it'll take grease. But as soon as I put the blade in place and tighten the blade nut I'm back to square one, won't take grease. And I can't find anything blocking grease from flowing from the zerk into the bearings. I'd originally planned to take the entire spindle assembly to my cub dealer, the reason why I removed it from the deck in the first place, and I guess I'll do just that tomorrow. I hate being done in by something that appears so simple. Must be the reason why the real mechanics get the big bucks.