Most problems with pendulum clocks not working is because the beat is not correctly set.
Listen to the clock working, there should be an even interval between each tick…. tock…. tick…. tock. If the clock is doing a tick.tock……tick.tock…… the lift one side of the clock, so it sounds even.
Some clocks do have a self-setting beat, you should give the pendulum a big swing when you start it going, then it will settle down.
You can also try cleaning some of the cog bearing points with lighter fuel.
Listen to the clock working, there should be an even interval between each tick…. tock…. tick…. tock. If the clock is doing a tick.tock……tick.tock…… the lift one side of the clock, so it sounds even.
Some clocks do have a self-setting beat, you should give the pendulum a big swing when you start it going, then it will settle down.
You can also try cleaning some of the cog bearing points with lighter fuel.