Introduction
Count-wheel strike systems are simple and reliable when properly adjusted, but even small alignment errors can cause the strike to run on, stop early, or fail to lock. Most problems come from misaligned levers, incorrect warning timing, or improper interaction between the count lever and the wheel slots. This guide explains how the system works and how to correct the most common issues.
How the Count-Wheel System Works
Count wheel slots determine strike length
Each slot corresponds to a specific number of strikes. The deep slot signals the end of the hour sequence.
Count lever follows the wheel
The lever drops into each slot to control how long the strike runs.
Warning and locking
The strike train enters warning before release, then locks when the count lever drops into the deep slot.
Lift pins trigger the strike
Pins on the center arbor lift the strike lever to start the sequence.
Power flow through the strike train
Proper pivot condition and gear alignment are essential for smooth operation.
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.
Correcting the Problem
Step 1: Adjust the count lever
Bend slightly so it drops cleanly into each slot without rubbing the wheel.
Step 2: Align the count wheel
Reposition the wheel so the deep slot aligns with the end of the hour sequence.
Step 3: Correct warning timing
Adjust the warning lever so the train enters warning reliably before release.
Step 4: Check lift pin height
Ensure the lift pins raise the strike lever enough to unlock the train.
Step 5: Restore strike-train power
Clean pivots, check bushings, and verify smooth wheel rotation.
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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