How To Remove A Clock Movement
The first thing I like to do is take a quick picture of the dial so that I can see what position the hands are in (this will save you some time when you assemble the clock). This particular clock we are working on is a nice Seiko, it is a unique clock as it does have a very nice case and the movement is unlike any other Seiko movement I have seen. The reason we are taking the movement out is that we want to inspect the strike train and clean/oil the pivots. When we received this clock it would strike 12 times on every hour and then it stopped striking altogether it would still keep time though.
Make sure you put the dial nut and hands in a plastic bag as it can be a royal pain in the ass to try and find a specific dial nut and/or hands.
Take out the 4 screws holding the movement to the case (put them in a plastic bag again) and reassembly is the reverse.
We suspected the movement had a rack and snail as I had seen the same issues on other movements that used the rack and snail. We went ahead and cleaned the pivots and oiled them, after we reassembled the clock it did strike correctly (i.e. 3 gongs at 3 o'clock) for a short time and then stopped.
We simply lifted the hammers (they we sticking a little) and the clock has been striking correctly ever since. Note the open escapement, I LIKE IT!