A lot of the time the hour hand is simply pushed onto the hour post. It is free to rotate without a fixed gear locking it to the clocks internal hour counting mechanism. Therefore, it is possible for the hour hand to get out of sequence with the clock mechanism.
To fix this move the minute hand around until it is in the 12 o'clock position and the clock starts striking the hours. Count the numbers of hours struck and rotate the hour hand until it corresponds with the correct number of strikes. The clock hands are now in synch with the internal clockworks. Lastly, rotate the minute hand until the clock reads the correct time. If the hour hand does not move when light pressure is applied you should consult a clock expert.
http://ticktocktony.com/
March 2010