It doesn t matter if the case is not vertical as long as the sound is even.
Mantle wall clock wont stay running.
Do not try to force it to wind any further.
Moving a mechanical mantel clock from one place to another is one of the most common reasons why it stops running and can result in one of the following.
Move the pendulum back and forth with your fingers.
If it s worse place the coin under the other side instead and listen again.
If it will run ok with the case at an angle we can sort that out after.
To correct a spring driven clocks mantle or wall clock that is bonging the hour when the minute hand gets to 6 o clock instead of 12 o clock just count the bongs take off the minute hand and reinstall it on the clock pointing to 12 o clock then turn the hour hand to the hour you heard the clock bong and its done.
Free the hands to restart the clock.
This may cause cracks over time at the end of the mainspring.
Level the clock on its four levelers if the clock stops running.
Wind it up until it stops.
Pendulum over swing if the bob on the pendulum hasn t first been immobilized or removed from the pendulum arm before the clock is moved the pendulum can over swing go past its normal arc and throw the clock out of beat.
For mantle clocks with a pendulum a temporary cure may be to place something under one side of the clock such as a coin and listen again to see if it s any better.
Mantel clock does not strike the correct hour if after several hours of operation your clock does not strike the correct hour grasp the hour hand only and move it forward or backward to line up with the correct hour on the dial indicated by the number of times the hour strikes.
It should sound steady and even like a metronome.
Gently move the hands with a finger to see if they are touching the dial the glass or each other.
If you don t hear a ticking sound the clock s hands are probably stuck.
The lever shouldn t be set to silent.
The easiest way to adjust this in the first instance is simply to tip the clock on the wall.
Set the lever on the dial to one of the chime selections if the clock won t chime or strike.
It should be as level as possible and under no circumstances should it rock.
Add two or three coins if you need to until the tick sounds even.
Listen to the tick tock on the clock and see if it is nice even tick tock.