Open the clock

• Open the front face of the grandfather clock. Use a screwdriver to gently remove the glass face on the front of the clock so that you can access the hands of the clock.
  
  

Repair the minute hand

• Hold the minute hand down with a pair of pliers and take off the nut with a wrench. Remove the minute hand and position it so that it matches with the number of chimes that are played (see below). Once the minute hand is synchronized to the notes played by the chimes, replace the nut and tighten it.
  Note: chimes should play four notes at the quarter-hour, 8 notes on the half-hour, 12 notes at the three-quarter hour mark, and 16 notes at the top of the hour.
  
  

Separate the Hands

• Separate the hands on the clock face. The pendulum will not swing if the hands of the clock lock together. Carefully open the clock face and separate the hands from each other.
  
  

Repair the pendulum bob

• Adjust the pendulum bob. If the clock speed is too slow or fast, the pendulum bob needs to be adjusted. If the clock is running too slowly, use a small flat-head screw driver to move the bob up the shaft of the pendulum. If the clock is moving too fast, move the bob down the shaft.
  
  

Moon dial repair

• Adjust the moon dial. If the moon dial is not correctly configured, the clock sequencing will be off. Open the face of the grandfather clock. Identify the current phase of the moon. Press lightly on the moon dial and turn it slowly towards the current moon phase.
  
  

Position the clock

• Check the angle of the grandfather clock. In order for the grandfather clock to keep correct time, it must be level. Use a level to check the position of the clock and make the necessary adjustments to the clock so it is level.