One of my best spring-wound wall clocks. Gustav Becker clocks are a real treasure.
This one is in excellent condition. As far as I can see, it’s all original. Porcelain face, 8 day Time & Strike.
During the process of dismantling the movement for cleaning, I noticed something that I missed when the movement was assembled. The fly fan that governs the strike speed had been replaced and repaired with a makeshift effort fabricated from a small piece of sheet brass (see photo A).
This fundamental mistake was made during a previous attempt to repair the clock. It was poorly aligned and it anchored the fan to the wheel.
As you can see in the photos, a tab was fabricated and bent through the spoke of the wheel. This prevented the fan from spinning on the wheel shaft.
The fly fan must be able to spin with a friction fit. This is important because the inertia that builds when the fly stops can shear off a gathering pallet or a stop pin.
I found a spare fan and with some small modifications was able to fit a new fan and complete the repairs (Photo B).
One major problem I encountered when reassembling the movement was to synchronize the strike hammer to rest between the lifting pins after it completed its strike cycle. Some movements have the gears marked; this one did not and I could not figure out an easy way to sync the gears other than taking the plates off (about 10 times!!) and making further adjustments. I eventually got all in working order, but surely there is an easier way.
If anyone reading this has advise that might make a similar repair simpler in the future, please let me know!