OK, after installing new tires, I have found that I don't have the cable adjusted right for the Sturmey Archer 3 speed. I have 2nd gear, but no first gear, and trouble with third slipping. I am thinking the cable is too loose. I have looked at Sheldon Brown's link. I am still having issues adjusting. Any tricks to this? Should I post to the mechanical forum? All this and I got caught in a rain storm coming home. At some point, more rain doesn't matter.
BTW, my wife bought me a pannier today for it, a very nice one from Performance. I need to adjust my rear rack so my feet clear, but it will be cool when done. She is a good wife!
I just reassemble the cable with the twistgrip set in high gear. I simply adjust it up so that the slack has gone out of the small chain, but that it hasn't gone tight when I fiddle with it. Then with the bike upside down on a picnic table in the yard, I work the pedals and gear change. You can tell by the feel whether you have low, mid and high gear. It is usually bang on, and then I do a road test.
I know you are supposed to be able to see an indicator rod through the end of the nut, but on my Merc you can't - at least I'm damned if I can. Maybe I should wear my reading glasses.
As a rule of thumb, if you can't get low gear, the cable is too lose, and if you can't get high gear the cable is too tight.