Coaster model 900723 grandfather clock doesn't keep time

Everybody should know that the coaster clocks discussed here run on batteries. The timing mechanisms, the chimes as well as the pendulum all are powered by a battery. Changing the speed of the pendulum is impossible because there is no adjustment. Besides, it wouldn't matter anyway. The pendulum has now affect on the clock's ability to keep accurate time. It is purely aesthetic. This is a pretty cool looking clock and even has weights, but those are also purely aesthetic and do not move the way a classic grandfather clock weight would move. The moments with these clocks are not designed to be worked on. These clocks are relatively inexpensive (approximately $300) but do add a nice look to your home. Grandfather clocks snobs would say though; this is not a true timepiece. They're right... Sorry.

If this is a mechanical clock with a pendulum, then you can do the following. On the pendulum there is a round bobbin, under the bobbin is a nut, this nut is called a rating nut. To speed the clock up, turn the nut from left to right and to slow it down, right to left. I do not know the length of your pendulum. You need to experiment. Try 1 full turn over 24 hours.
You will probably find a difference in time keeping between Summer and Winter. This cannot be helped. This is called expansion and contraction.
I fix these mechanical clocks for a living so if you need more information you are more than welcome to email me Yvonne [email protected]

These units have a battery driven clock movement, and so the first thing to check is that the batteries are good, and also that their contacts, as well as the ones in the clock, are clean and free of dust or oxidation.
There is little else you can check, unless you're a watchmaker, and can repair or clean movements. The best thing to do, if all else fails, would be to purchase a new movement. A watch repair shop should be able to get you a replacement movement.
Good luck, and hope this helps.

Hi,

Kindly read the below paragraph :-

A grandfather clock cannot work properly unless the weights are adjusted weekly. While the pendulum works off gravity to pull the weights, the weights themselves will begin to get off balance, and the clock will not keep the right time. The owner must adjust them to the proper heights. Each weight has a different height so that the pendulum's swings affect it differently. They move the hands around the clock, based on a certain number of swings from the pendulum. If a weight is set too high or too low, it will cause the corresponding component of the clock to move at the wrong speed, throwing the time off.

There is a nice troubleshooting list :-

http://www.grandfatherclocks.info/grandfatherclockmovements/

Let me know,if needed further assistance.

Hope i helped you.

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