Grandfather Clock Moon Gear Installation

Grandfather Clock Moon Gear Installation

Grandfather Clock Moon Gear Installation is as follows. The moon phase function is only run by one gear. The gear is known as a Moon Gear. It sits behind the dial on the same tube as the hour hand. It is easy to remove by loosening the set screw so it will slide off.

The moon gear gets put on the new movement at close to the same place it was on the old one. Trick is to only have it align with the gear behind the dial that it is to engage with. As long as the two engage, that one moon gear will spin the gears on the back of the dial. This will turn the phase of the moon over time.

If the clock stops after a short time with the dial on, it is possible that moon disk is not turning freely. Of course this is not the fault of the movement, but in the dial alone. The lunar disk is like a saw with the teeth. There is a flat bar that keeps it from spinning more than one tooth at a time. The brass or bronze flap that presses against the saw tooth looking edge of the moon disk should not put a lot of force against the moon disk. It does not need to take monster truck force to spin that disk. The bar only needs to stop it from spinning more than one tooth at a time.

The adjustment for this, if it were to happen, is to just bend it back some so there is not as much tension.