Introduction
The Hermle 1161‑853AS is a popular triple‑chime movement, but slow chimes, weak strike, and broken cables are common symptoms of power loss or improper setup. These issues often originate in the chime train, the cable drum, or wear in the wheel pivots. This guide explains how to diagnose slow chimes, how to inspect the Hermle wheel train for wear, and how to prevent cable failures through proper maintenance and lubrication.
Understanding the Hermle 1161‑853AS Chime System
Triple‑chime design
This movement plays Westminster, Whittington, or St. Michael chimes. Each melody relies on a dedicated chime wheel and hammer sequence.
Chime train power flow
The chime train draws power from the right‑side weight. Any friction or wear reduces hammer lift and slows the melody.
Cable drum function
The cable drum winds the weight cable evenly. If the cable overlaps or frays, the drum may bind and reduce power.
Warning and release
The chime train enters warning before each quarter. Incorrect warning wheel alignment causes hesitation or slow startup.
Hammer lift resistance
Stiff hammer tails or misaligned rods increase load on the chime train, slowing the sequence.
Diagnosing Slow Chimes
Check weight drop
If the weight is not descending smoothly, the cable may be binding or overlapping on the drum.
Inspect the chime hammers
Hammers must lift freely and return without drag. Bent rods or sticky pivots slow the chime train.
Evaluate wheel freedom
Each Hermle wheel in the chime train must spin freely. Worn pivots or dry bushings cause power loss.
Check the chime barrel
The chime barrel must rotate smoothly. Dirt or wear in the barrel pivots slows the melody.
Inspect the fly governor
The fly must spin freely. Dirt or bent vanes restrict speed and cause slow chimes.
Broken Cable Causes and Prevention
Overlapping cable on the drum
If the cable winds unevenly, it can pinch itself and snap under load.
Frayed or kinked cable
Old or damaged cables weaken over time. Replace at the first sign of fraying.
Incorrect winding technique
Rapid or uneven winding can cause the cable to jump grooves and bind.
Drum wear
Worn grooves or rough edges on the drum damage the cable and reduce smooth weight descent.
Weight misalignment
If the weight rubs the case or hangs crooked, the cable experiences uneven tension.
Lubrication and Maintenance
Oiling pivots
Apply a small drop of oil to each pivot hole in the chime train. Dry pivots are a major cause of slow chimes.
Do not oil the fly
The fly governor must run dry. Oil causes drag and erratic speed.
Do not oil hammer tails
Hammer levers must move freely without lubrication. Oil attracts dirt and increases resistance.
Check for bushing wear
Oval pivot holes reduce power. Install bushings where needed to restore proper wheel alignment.
Clean the movement
Dirt and old oil create drag. A full cleaning restores proper power flow through the train.
Troubleshooting Flowcharts
If the chimes run slow
Check hammer drag → Check fly freedom → Check Hermle wheel pivots → Check cable drum → Check lubrication
If the chimes stall completely
Check weight drop → Check cable overlap → Check chime barrel → Check pivot wear → Check warning wheel
If the cable breaks
Inspect drum → Replace cable → Check weight alignment → Check winding technique → Inspect grooves
If the chimes sound uneven
Adjust hammer lift → Check rod clearance → Inspect hammer springs → Check chime barrel rotation
If the movement loses power
Check pivots → Check bushings → Clean movement → Verify weight → Inspect Hermle wheel train
Common Mistakes to Avoid
Oiling the fly
This slows the chime train and causes erratic speed.
Ignoring cable condition
Frayed cables can snap suddenly and damage the movement.
Over-bending hammer rods
Excessive bending weakens the rods and causes long-term misalignment.
Skipping pivot inspection
Worn pivots are a major cause of slow chimes in older Hermle movements.
Using the wrong oil
Only clock-grade oil should be used on pivots.
Checklist for Final Verification
• Chime train runs smoothly
• Cable winds evenly on drum
• Hermle wheel pivots clean and lubricated
• Fly governor spins freely
• Hammers lift and return without drag
• Movement completes full chime cycle without hesitation
FAQs
Why are my Hermle chimes running slow?
Usually due to power loss from worn pivots, dirty wheels, or hammer drag.
Why did my cable break?
Overlapping, fraying, or drum wear are the most common causes.
Should I oil the chime hammers?
No. Only pivots receive oil—never hammer levers.
How do I know if a Hermle wheel is worn?
Look for rough pivots, oval holes, or wheels that do not spin freely.
Do slow chimes mean the movement needs a full overhaul?
Often yes—slow chimes are a classic sign of power loss in older Hermle movements.
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