JAPENESE MECHANISMS:
One that says crown on the front of the mechanism; it has a rack and snail, and
a clutch system hooked to the hour hand. The mainsprings hook around retainer rids that
make it almost impossible to disassemble and assemble the mechanism by clamping the
mainsprings in the usual manner. The secret here is to repair the mechanism without
clamping the mainsprings . Let them all the way down ; there will be about 8 or 9
feet of loose floppy mainspring dangling about the bench. take the centerpost cam off
if possible before separating the plates; it will be much easier to disassemble. If you
make a jig to hold the springs ,and steady the mechanism, it will be feasible to do
the work this way. Be sure to double and triple check the bushings before the final
assembly is done; its a long procedure to pre-disassemble this particular mechanism.
It’s cumbersome but is easier to get it back together without bending or breaking pivots.
Be sure that the mainsprings are inside the retaining pins as the mechanism is
disassembled; its too late to move them after the mechanism is reassembled.