Introduction
Count-wheel strike systems are simple, durable, and widely used in American and European clocks. Instead of using a rack-and-snail system, the count wheel determines how many strikes occur by controlling when the strike train stops. When the strike runs on, stops early, or behaves inconsistently, the cause is usually lever alignment, worn pivots, or incorrect count-wheel positioning. This guide explains the fundamentals of how the system works and how to diagnose common issues.
How the Count-Wheel System Works
The count wheel controls strike length
The wheel has deep and shallow slots. The deep slot marks the end of the hour strike sequence.
The count lever follows the wheel
The lever rides on the wheel’s rim and drops into each slot to determine how long the strike runs.
Warning and release
The strike train enters warning just before release, ensuring proper timing.
Lift pins start the strike
Pins on the center arbor lift the strike lever to begin the sequence.
Power delivery
Clean pivots and proper lubrication ensure the strike train runs smoothly.
Common Count-Wheel Problems
Strike runs on too long
The count lever is not dropping fully into the deep slot.
Strike stops too early
The lever is catching the edge of a slot instead of dropping cleanly.
Strike fails to start
Lift pins may be misaligned or the warning lever may not release.
Strike stalls mid-cycle
Indicates power loss or binding in the strike train.
Strike repeats the wrong number
The count wheel may be out of position or installed incorrectly.
How to Diagnose the Issue
Check count lever drop
Advance the minute hand and watch the lever. It must fall fully into each slot.
Inspect the deep slot
Ensure the lever reaches the bottom—partial drops cause run-on.
Verify warning position
The train should enter warning just before the strike begins.
Check lift pin timing
Lift pins must raise the strike lever high enough to release the train.
Inspect strike-train freedom
Dirty pivots, worn bushings, or bent arbors reduce power and cause stalling.
Troubleshooting Flowcharts
If the strike runs on
Lever not dropping → Deep slot misaligned → Lever rubbing → Wheel installed incorrectly
If the strike stops early
Lever catching → Slot edges worn → Lever misaligned → Warning too shallow
If the strike won’t start
Lift pin too low → Warning not releasing → Lever binding → Power loss
If the strike stalls mid-cycle
Dirty pivots → Worn bushings → Bent arbor → Train misalignment
If the strike repeats wrong counts
Wheel rotated incorrectly → Lever height wrong → Deep slot not aligned
Common Mistakes to Avoid
Over-bending levers
Small adjustments are best—large bends cause binding.
Oiling the count wheel
Oil attracts dirt and causes drag.
Ignoring pivot wear
Upper-train wear often causes strike inconsistencies.
Skipping warning checks
Incorrect warning timing leads to misfires and run-on.
Testing outside the case only
Some issues appear only when the movement is installed.
Checklist for Final Verification
• Count lever drops cleanly
• Deep slot aligned
• Warning correct
• Lift pins effective
• Strike train free
• Movement runs full strike cycle
FAQs
Why does the strike run on?
The count lever is not dropping fully into the deep slot.
Why does the strike stop early?
The lever is catching the edge of a slot.
Why won’t the strike start?
Lift pins or warning timing are incorrect.
Why does the strike stall?
Power loss from worn pivots or bushings.
Why are the counts wrong?
The count wheel is misaligned or installed incorrectly.
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