How to Fix a Mechanical Clock That Stops Randomly
A mechanical clock that stops without warning is one of the most frustrating issues clock owners experience. Sometimes a clock will run perfectly for hours — or even days — only to suddenly stop with no clear pattern. In this guide, you'll learn the true causes behind intermittent stopping and the steps you can take to diagnose and correct the issue.
Most Common Causes of Random Stopping
Mechanical clocks usually stop for one of the following reasons:
The clock is out of beat
The movement is overdue for cleaning
The clock is out of level
Low pendulum amplitude
Dirty or worn pivot holes
Worn suspension spring
Interference in the gear train
Ensure the Clock Is in Beat
An uneven tick-tock is the number one cause of random stopping. To test:
Listen closely to the beat
If tick—tock spacing is uneven, adjust the crutch
Level the clock side-to-side
Check for Levelness
Even clocks that appear visually level may be tilted just enough to cause stopping. Use a level tool to confirm both:
Left-right leveling
Front-back leveling
Inspect the Pendulum and Suspension Spring
A bent, twisted, or weak suspension spring reduces pendulum swing amplitude. Low amplitude prevents proper escapement locking and release, causing intermittent stops.
Dirty Movement and Old Oil
If the clock hasn’t been serviced in 5–10 years, dried oil becomes sticky and creates resistance. The clock may run intermittently but will stop once friction overcomes the impulse from the escapement.
When Professional Service Is Needed
If leveling, beat adjustment, and suspension inspection don't solve the problem, your clock likely requires:
Ultrasonic cleaning
Pivot polishing
Bushing replacement
Escapement rebushing
Residents of Calhoun, GA and the surrounding areas can contact Time and Seasons Clock Repair for full movement service.
