Repairing a 1950s Junghans 8-Day Westminster Chime Clock

Introduction

By the 1950s, Junghans in Germany was producing well-designed 8-day Westminster chime movements for mantel and wall clocks. These three-train movements offer quarter-hour Westminster chimes on rods and an hour strike, all driven by three mainsprings or, in some cases, three weights. They are precise, but also more complex than basic time-and-strike clocks, and poor handling or partial “spray and pray” oiling will quickly throw chimes and strike out of sync.

This guide walks through the repair of a typical 1950s Junghans 8-day Westminster chime movement. We’ll cover identification, common failure points, safe disassembly, cleaning, mainspring service, bushing work, reassembly, and the critical setup steps to correctly synchronize the quarter chimes and hour strike with the hands. For replacement parts—hammers, chime rods, mainsprings, levers, and wheels—VintageClockParts.com provides carefully photographed components for German chime clocks.

Identifying a 1950s Junghans Westminster Chime Movement

Typical markings

Junghans movements from this era usually show:

• The Junghans star logo stamped on the back plate.
• Additional code numbers indicating year and model.
• Three-train layout: time, chime, and strike trains side by side.

Case styles and configuration

A 1950s Junghans Westminster movement is often found in:

• Tambour or Napoleon-hat mantel cases.
• Rectangular or arched mantel clocks with chime rod blocks mounted in the back.
• Occasionally wall clocks with long, multi-rod chime blocks.

The defining feature is the Westminster melody on four or more rods, playing progressively at the 1/4, 1/2, 3/4, and full hour, followed by an hour strike.

Overview of the Junghans Westminster Movement

Three-train design

The movement consists of:

• Time train: runs the hands and escapement.
• Chime train: plays Westminster quarters on chime rods.
• Strike train: counts and strikes the hour after the full chime.

Each train has its own mainspring barrel (in spring-driven models) and associated gear train, warning, and stop mechanisms. Coordination between trains is controlled by cams, pins, and lifting levers on the center arbor and related parts.

Westminster chime sequencing

A typical sequence:

• Quarter past: first phrase of Westminster.
• Half past: first and second phrases.
• Quarter to: first three phrases.
• On the hour: all four phrases, followed by hour strike on separate rods or the same block.

Correct setup ensures that the correct chime phrase plays at each quarter and that the strike follows only the full hour chime.

Common Problems in 1950s Junghans Westminster Clocks

1. Chime train won’t start or stops mid-melody

Likely causes:

• Dried oil and dirt in chime train pivots.
• Worn bushings causing gears to lean and bind under load.
• Weak or set chime mainspring.
• Incorrectly positioned warning pins or locking levers.

2. Chime out of sync with the hands

Symptoms:

• Wrong Westminster phrase at the quarter.
• Full chime playing at the wrong time.
• Strike occurring before or without the full chime.

This usually indicates that the chime drum/cam and the hand shaft have been shifted relative to one another, or the synchronization lever was not set correctly during a previous repair.

3. Strike count incorrect

If the clock chimes correctly but strikes the wrong hour:

• The hour snail and hour hand may be misaligned.
• Rack and snail interaction may have been disturbed.
• A previous repair might have reassembled the strike rack incorrectly.

4. General stoppage or weak running

As with any 70+ year-old movement:

• Pivots and holes are worn and dirty.
• Mainsprings are set or dry.
• Escapement may have excessive lock or drop, wasting power.

Repair Process – Step by Step

1. Preliminary diagnosis in the case

Before removing the movement:

• Observe chime behavior through a full hour cycle.
• Note which quarters play correctly and which do not.
• Listen for weak or hesitant chime starts, suggesting lack of power.

Document everything with photos and notes—you’ll rely on this to verify that the final setup matches correct behavior.

2. Safe mainspring let-down

For spring-driven Junghans movements:

• Use a let-down key to carefully release each train’s mainspring.
• Let down time, chime, and strike springs fully.

Never open the plates with springs fully wound; the three-train design amplifies the risk of damage.

3. Movement removal and documentation

Once safe:

• Remove hands, bezel, and dial.
• Photograph the front of the movement to record chime cam positions, rack and snail, and lever positions.
• Photograph the back of the movement, especially showing chime drum or pin barrel and warning pins.

Label any external levers, rods, or trip wires linking the movement to the case (e.g., chime/silent lever).

4. Disassembly of the three trains

Disassemble with care:

• Remove hammer assemblies and any external linkages first.
• Separate front and back plates while supporting gear trains.
• Group time, chime, and strike train wheels separately on the bench.

Take extra care with chime components—locking levers, warning wheels, and chime barrel positioning are easy to misplace or mis-time.

5. Cleaning and inspection

Thorough cleaning is mandatory:

• Degrease plates, wheels, and pinions to remove old oil and dirt.
• Inspect pivots for grooves, pitting, or corrosion.
• Check pivot holes for oval wear, especially in the chime train, which carries heavy load.

Examine the mainsprings: if heavily set, cracked, or rusted, plan to replace them rather than reuse.

6. Mainspring servicing

Each of the three mainsprings should be:

• Removed from its barrel or arbor.
• Cleaned to bare metal.
• Inspected for cracks and set.
• Lubricated properly before reinstallation.

Chime and strike trains require strong, smooth mainsprings to play Westminster and strike without faltering.

7. Pivot polishing and bushing work

Restore the power path:

• Polish all pivots to a bright, smooth finish.
• Install bushings in worn pivot holes, starting with chime and time trains.
• Ensure wheels stand straight and mesh cleanly when placed between plates.

Failure to address wear will result in unreliable chime and strike even after cleaning.

8. Reassembly and lubrication

When reassembling:

• Rebuild each train in the correct order, confirming pivot seating.
• Install levers, cams, and racks according to your reference photos.
• Oil lightly at pivots and specified friction points only.

Avoid oiling the chime barrel pins or cam faces—they require clean, crisp contact with levers, not lubrication.

Setting Up the Chime and Strike After Repair

1. Establishing the correct chime position

With the movement on a test stand:

• Wind the chime train and slowly advance the minute arbor.
• Observe the quarter chime sequence and locate the full-hour chime position.
• Set the chime drum or cam so that the full Westminster plays exactly when the minute hand is at 12.

On many Junghans movements, you can loosen a friction fit or reposition a cam to bring chime sequence into agreement with the minute hand.

2. Synchronizing the hour strike

Once the chime is correctly timed:

• Ensure that the strike train only runs after the full, four-phrase Westminster at the hour.
• Adjust racks and levers so the hour strike begins immediately after the last chime notes.
• Adjust the hour hand on its friction collet so the number of strikes matches the hour indicated.

If the clock strikes 3 when the hour hand points to 4, reposition only the hour hand, not the snail or rack, unless the strike system was previously misassembled.

3. Beat and escapement adjustment

With chime and strike working:

• Adjust the crutch so the tick and tock are evenly spaced.
• Verify proper lock and drop on the escapement.
• Test run for multiple days to ensure that chime and strike remain in sync over time.

Case, Dial, and Chime Rod Considerations

Case and acoustic performance

A Westminster chime clock depends on:

• Solid mounting of the chime rod block to the case.
• Correct hammer distance from each rod (just off the rod at rest).
• Clean, secure case joints to prevent buzz and rattles.

Fine-tune hammer angles so each rod sounds clearly without double-striking or excessive bounce.

Dial and hand fit

Ensure:

• Hands do not rub each other or the dial.
• Minute hand collet is tight but adjustable for fine chime alignment.
• Any chime/silent or fast/slow dials and levers are correctly aligned with their underlying mechanisms.

Parts and Restoration Resources

Mid-century Junghans Westminster movements often need fresh mainsprings, replacement hammers, suspension units, or specific gears after a serious failure. Using correct parts is crucial to preserve the clock’s mechanical balance and chime quality.

Visit VintageClockParts.com to browse a curated inventory of German chime clock parts, including Junghans mainsprings, hammers, chime rods, suspension springs, and small hardware. Each part is photographed from multiple angles, allowing you to match details and source exactly what you need to return your 1950s Junghans 8-day Westminster chime clock to full, musical operation.

Related Restoration Guides

• Restoration of a One-Weight Vienna Regulator Clock
• Diagnosing Problems on a Sessions 8-Day Clock Movement
• Restoration of a Gilbert Ladder-Chain Movement in an Ithaca Grandfather Clock

Frequently Asked Questions

Why does my Junghans Westminster clock chime the wrong melody at the quarter hour?

The chime drum or cam is out of sync with the minute hand. It must be repositioned so the correct Westminster phrase plays at each quarter and the full melody at the hour. This is usually corrected during reassembly and setup by aligning the cam with the hand shaft.

My Junghans clock plays the chime but does not strike the hour. What is wrong?

The strike train is not being released after the full hour chime. This can be caused by misadjusted locking levers, incorrect timing between chime and strike warning pins, or reassembly errors in the rack and snail. The linkage that transfers control from chime to strike must be inspected and reset.

Can I repair a Junghans Westminster movement without fully disassembling it?

You can sometimes address minor chime synchronization issues without disassembly, but any clock of this age with weak power, stopping, or noisy operation needs full disassembly, cleaning, mainspring service, and bushing work. Westminster movements are complex enough that partial “shortcut” repairs rarely hold up over time.