It just needs a simple adjustment.
Pendulum wall clock runs slow.
Push the bob up to make the clock run faster and push the bob down to make it slower.
Can we see the movement.
Shorten the pendulum by turning the screw mechanism to the right 1 2 turn.
If it does not have a little slt that has and s and f on each side then it can not be adjusted go to walmart or a hobby shop and buy a new closck mechanism.
If the clock is running fast turn the pendulum nut counterclockwise to decrease the rate.
Locate the adjustable weight or screw mechanism near the pendulum arm.
Adjust the pendulum up or down.
To slow down the clock loosen the adjustment nut turn it toward your left.
The bob will settle lower making the effective length of the pendulum longer.
The movement that s in the clock also does not appear to be a very strung runner rather weak pendulum swing.
Changing the speed of time keeping is accomplished by moving the pendulum disk up or down.
Clocks with an interior or exterior pendulum have adjustment screws either on the pendulum or through a hole in the top of the clock.
A pendulum too high causes the clock to run fast.
Moving a clock to a higher elevation will slow it down as the air is thinner.
They are cheap and.
If the clock is running slow turn the pendulum nut clockwise to increase the rate.
To speed up the clock tighten the nut turn it toward your right.
The pendulum disk is moved up or down by turning the adjustment nut.
Denser air causes the pendulum to move more slowly.
Use the following rules to adjust the pendulum nut.
To slow the grandfather clock down move the pendulum disk down by turning the adjustment nut to the left.
Lengthen the pendulum by turning the screw mechanism to the left 1 2 turn.
You may be able to replace the escape wheel with one that has fewer teeth which will require a longer pendulum.
Too low causes the clock to run slow.
A clock that runs quickly still works fine.
Pendulum bob with rate adjustment french time and strike.
Increasing the ambient temperature of a clock will slow it down from the expansion and lengthening of the pendulum unless the pendulum is a compensating type.
The clock will run slower.