Cuckoo Clocks

how to fix your own cuckoo clock

Here is a list of common easy to fix faults known to cuckoo clocks, together with the solution so you can fix it yourself.
Please be aware that these fixes require a degree of common sense and are undertaken at your own risk.

Common Cuckoo Clocks Problems DIY Fix
Check the wire from the bellow which lifts and tilts the cuckoo during the cuckoo call. The wire needs to be under the tail, and the position of the wire needs to be such that the cuckoo can easily return. The common fault Here is that the wire is trapped above the cuckoo tail preventing the return of the cuckoo after its call.
This could be the balance setting of the clock. Tilt the clock either left or right on its hook whilst listening to the ticking noise. The clock has to be in a position where the tick tock is even both sides. If you move the pendulum to the left until you hear the 'tick' noise and let go of the pendulum it should swing back. Repeat for the right hand movement of the pendulum and if it also swings back then you know the clock is in balance.

Another item to check is the clock hands. Are they free to move or do they rub and touch each other?

If your clock has a night time silence lever is it in the on position? This usually takes the form of a lever at the side of the clock or a pull rod under the clock. Check the position of the trap wire that stops the govenor (the fan fly) from spinning on the music box. See 'A' in photo below. It may be out of position. A very slight repositioning of the wire (a mm or so) by bending it may be all that is needed. Take your time with this as it is tricky to do. This wire needs to be in such a position that the music box is released a few mins before the cuckoo calls, but trapped by the wire waiting for the final moment of release once the cuckoo has stopped calling.
The right angled lever which sits on top of the music box is not attaching its self back into the music box barrel at the end of each tune. See 'C' in photo below. Make sure the top of this lever at the 'C' position is not in contact with anything else when the other end of the lever is in the music box stop hole 'B'.
This would be the position of the striking lever which hits the gong on the back door of the clock. Very slightly bend the gong on the back door of the clock slightly away from the striking lever. The aim is to allow the gong to vibrate once stuck without the striking lever touching it to enable a clear chiming sound.
The position of the trap wire at 'A' in the photo needs to be adjusted slightly. If the music box plays too early the wire need to be moved down very slightly by bending the wire. Only move this wire a mm at a time before testing. If the music box is making a 'chattering' sound when the music plays bend this wire up very slightly. Only move this wire a mm at a time before testing.
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