If this condition exists check the following:

1. Is the clock plumb?
2. Is the suspension spring twisted, bent or broken? If it is, it should be replaced.
3. Are the hands caught or rubbing?
4. Always make sure that the pendulum guide rides in the center of the verge tail slot, not touching front or back (see fig. 2).

After you have checked the above four and found them OK or fixed as necessary, you adjust the beat as follows:

1. Remove the pendulum.
2. Move the crutch to the left and right (see figure 2). The pendulum swing distance should be equal on both sides of the resistance point.
3. Move the crutch (see figure 2) to the resistance point closest to the center line. At the top point apply additional pressure; this will force the crutch to slip and therefore the beat to change.
4. Check for equal distance from center line. Repeat step three as necessary, this is a trial and error adjustment.
5. Hang pendulum and listen to the TICK-TOCK. Repeat steps if necessary.