Try the pinions to see if they are tight on the arbors, for they are often loose. The best way to secure them is with a little soft solder, taking great care afterwards to thoroughly clean off all the "tinning" fluid with chalk and water; finally oil them slightly all over. When the pendulum wabbles, it is owing to the spring being crippled, or loose in the stud, or to want of proper freedom in the crutch. One authority remarks that when the pinions of American clocks are worn, the quickest way to remedy them is to carefully turn each wire round, then add a small piece of solder to each; use rosin instead of salts for the soldering, then there will be no fear of the pinion turning rusty. This method, in some respects, is preferable to putting new wires; as, if a novice does the job, he is liable to push in wire that is much thicker than is required, which, of course, causes a bad depth. When American pallets are worn, the simplest way to move them is to get the centre of a Geneva hand and put behind the pallets, which will, in most cases, move them sufficient for them to act on an entirely new part. When the brass holes get worn, it will sometimes be well to open them, and solder in a piece of hollow brass wire; then open the wire to fit the verge pin.
This is better than wasting time trying to close the old brass holes.