Help! I tried to service my Seiko 7009-4030 automatic with a 7009A movement and somehow disabled the date from advancing. This first happened when I removed the winding stem and inserted it back without depressing the release lever. Did that have something to do with it (i.e. messing up the clutch)? Or, would I need to open the movement again and see if the problem is with the date dial/finger/dial guard?
I've managed to work on the winding mechanism side, but not on the dial side yet. After reassembling the winding mechanism and setting the time only, I noticed that the date won't advance but the day does after crossing 12 o'clock. The date does advance when I turn the stem though.
PS. The hardest part of the winding mechanism reassembly was getting the balance wheel back to the pallet fork with the wheel still attached to the balance cock via the spring. Getting it in there was just prayers and luck.