HUBERT HERR CUCKOOS:
These mechanisms have a shutoff system that depends entirely on gravity to
operate. Do not oil this system or it will not work.Looking at the mechanism from
the front: the shutoff lever reaches across the outside and drops down on the rod
with the little brass weight that looks like a bushing and pops it out of the way of
the locking lever on the inside of the plate. The angles here are critical. Do not change
them. Be sure the position of the 3rd wheel does not change ; if it is rebushed the lock
will not set and hold if this wheel position changes.Oiling this causes the thing to
hang up fr9om the surface tension of the oil. If it is hanging up , polish it carefully
but do not oil the hook or the rod.
some of the older cuckoos do not have an inspection hole in the back to
allow access to the gong and hammer for adjustment. There are several ways
around this. The least desirable is to drill a hole near the center of the gong.
The reason I say least desirable is this : you may very well end up with a very
angry customer when they see the hole you drilled in their prized 100 year old
family heirloom that great grampa brought from germany during world war 1.
Do not ever alter someone’s clock unless you have a very good understanding
with them; and even then you are taking a big chance. The best way is to adjust
the hammer/gong clearance before the bellows are installed. The hammer and
gong can be seen through the hole for the bellow. It is possible to reach the hammer with an adjustment tool. Bend the hammer not the gong. I am remembering
here the time I was adjusting a cuckoo for a customer at the counter ; and just a slight
adjustment on the gong and ……….. OH NO!!!!!!!! Guess what happened ? the gong
broke off in my hand. Unbeknownst to me and the customer the last person to work on
the clock had taken the fatal short cut and bent the gong several times just enough.
Hubert herr roof mount music mechanism : trip lever has to be absolutely free to move or
the clock will not cuckoo because there is no return spring.
Just enough to weaken it and now it was my turn to break it. Bend the hammer ,
not the gong.
The 1 day regula cuckoo clock movements with 77mm x 75mm plates
(stamped with 35) have common pendulum lengths of 28.5 cm and 20.5cm. The smaller
regula movement 73mm x 63mm usually is available in 23.5cm pendulum length. These
are the same chain size. 61links per foot and a wire diameter of .035in.. The pendulum
length is measured from the suspension post to the center of the pendulum, bob or leaf.
SESSIONS 2 SPRING W/C:
Set the hour trip position on the front cam and coordinate with cam on the
back of the centerpost: cam on back of centerpost should move the pin on the hammer
lift assembly into sequence hole before the quarter hour trip and them drop off edge
n the half hour . Be sure the idler gear on the front plate is tight. The cam on the back
of the centerpost must be tight . Set the hammer sequence at the ΒΌ after position.