Introduction
One of the most common beginner problems is a clock that runs for a few minutes and then stops. This usually indicates a loss of power, an uneven beat, or friction somewhere in the train. This guide walks you through the most likely causes and how to diagnose each one safely.
Check the Beat First
Listen for an even tick-tock
An uneven beat is the number one cause of a clock stopping shortly after starting. The tick and tock should be evenly spaced.
Level the movement
Use a small level across the movement posts. If the clock only runs when tilted, the beat is off.
Adjust the crutch
Bend the crutch slightly in the direction opposite the tilt required to make the clock run. Make small adjustments and retest.
Check for Power Loss in the Train
Test wheel freedom
With the mainspring let down, spin each wheel gently. They should coast freely without hesitation.
Look for bent pivots
A pivot that wobbles or runs out of true will cause intermittent stalls.
Check for tight bushings
If a bushing was installed too tight, the pivot will bind and stop the train.
Inspect for Dirt and Old Oil
Dirty pivots
Dirt and dried oil create drag that quickly stops the movement. Cleaning is required before oiling.
Gummy mainspring
A mainspring that sticks instead of unwinding smoothly will cause weak power delivery.
Check the Escapement
Uneven pallet lock
If one pallet locks deeper than the other, the escape wheel may stall.
Pallet faces dry or dirty
Pallets require a tiny amount of oil on the leading and trailing faces only.
Escape wheel tooth damage
Bent or worn teeth can cause intermittent stopping.
Check for Case or Pendulum Interference
Pendulum rubbing
If the pendulum touches the case, backboard, or crutch slot, the clock will stop.
Movement not seated firmly
Loose mounting screws or a shifting movement can disrupt the beat.
Recommended Internal Links
FAQs
Why does my clock stop after exactly a few minutes?
This usually indicates a beat issue or a pivot binding under load.
Can oil fix a clock that stops?
No. Oiling a dirty or worn movement will not restore proper power flow.
Why does the clock run longer when tilted?
The beat is off. Tilting compensates for an incorrect crutch position.
Do worn bushings cause intermittent stopping?
Yes. Excessive pivot play causes power loss and erratic running.
Should I adjust the escapement?
Only after verifying beat, power flow, and cleanliness. Escapement adjustments are delicate.
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