Expert: Tom Williams - 2/9/2012

Question
we have an old clock that used to work. repaired by hamilton years ago.
Cannot wind any of the 3 holes in the face. Key stops as if it's wound too tight.
Any thoughts?

Answer
It sounds to me like the simply will not run.  It should run no matter how tight it is wound except excessive force can sometimes damage one of the main springs.  

The most common cause of a clock stopping after many years of faithful service is evaporation of the oil that lubricates it or the oil becoming gummy.  The movement should be removed from the case and cleaned with a petroleum base solvent such as printed circuit board or carburetor cleaner.  I assume you do not want to disassemble the movement so the spray can is probably the most effective device for doing this.  While still wet with the solvent the escapement should function if the pendulum rod is moved.  Sometimes it is necessary to apply some very slight forces to the gears to break them free and work the solvent in.  After cleaning put the movement aside for a few hours then lubricate all the pivots and each pinion (small) gear with a light oil.  There are special clock oils, however, I have had good luck using sewing machine oil for this purpose.  

There is a possibility that someone may have transported the clock without moving the pendulum thereby damaging the pendulum suspension spring.  This will require either replacing or repairing the spring.  

If the clock runs for a short period of time, then stops it probably will have to be rebushed by someone who has equipment for doing this.  

Disassembly of the movement will require the use of a band to contain the main springs and racing the movement until the springs have exhausted all their energy.  I have seen movements damaged severely by improper disassembly techniques.  If you have any other questions please contact me.