Jauch clock movements, particularly the PL 78 series, were high-quality German-engineered components widely used in grandfather and grandmother clocks by brands like Emperor and Herschede. Since Jauch is no longer in business, maintaining these movements requires specialized knowledge of their unique chime synchronization and sourcing original components from specialized vintage inventory. The PL 78 is typically a robust weight or cable-driven movement, but decades of use often lead to pivot wear that necessitates a professional rebuild with upwards of 20+ bushings.
Quick Diagnostic Flow: Jauch PL 78 Chime & Power
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1. Does the clock fail to chime at the quarter hour?
- → Yes: Ensure the weights are fully wound and the chime lever is not in the "Silent" position. Check for a bent trip lever behind the dial.
- → No: Proceed to strike synchronization.
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2. Is the chime sequence out of order?
- → Yes: Manually rotate the minute hand clockwise, pausing at each quarter-hour to allow the chime to complete. This often resets the count wheel sequence.
- → No: Proceed to pendulum check.
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3. Does the movement stop after a few minutes?
- → Yes: The clock is likely "out of beat." Listen for an even tick-tock cadence and adjust the case level or crutch position until symmetrical.
- → No: The movement is mechanically sound but may require periodic oiling.
The Jauch clock movement identification is usually found on the back plate, often stamped with "Jauch," "Western Germany," and a caliber number like "PL78" alongside a production date (e.g., 11 76). For those performing a deep restoration, a [Jauch Movements Specification Manual](https://ronellclock.com/product/manual-for-us-navy-mechanical-boat-and-deck-clocks-chelsea-2/) is an invaluable resource, providing exploded views and part lists for over 43 styles of movements. When reassembling, pay close attention to the [pendulum bridge](https://www.ebay.com/itm/286890928187) and ensure the escape wheel arbors are free of debris.
Sourcing original Jauch components can be challenging due to the brand's defunct status. Original [replacement wheels](https://griffensclocks.com/jauch/), arbors, and [suspension springs](https://www.ebay.com/itm/273804937947) must be matched precisely to the caliber to maintain the correct gear ratios. If a movement is too far gone, some restorers use Hermle replacement kits designed to fit the same footprint as the Jauch 77 or 100M series.
How do I set the time on a Jauch Westminster chime clock?
Move the minute hand clockwise only, pausing at the 3, 6, 9, and 12 positions for the clock to finish its chime before proceeding to the next quarter hour.
What suspension spring does a Jauch PL 78 use?
The [PL 78 suspension spring](https://www.ebay.com/itm/273804937947) is a specific metal part that may be held in place by a small pin or a black thumbscrew, depending on the production year.
Why is my Jauch clock not striking the hour?
If the quarter-hour chimes work but the hour strike fails, the count wheel or strike lever may be jammed. This often requires removing the dial to inspect the strike engagement pins.
Find the Right Parts for Your Clock Restoration at VintageClockParts.com
While we focus primarily on American clock movements and components, VintageClockParts.com maintains an inventory of over 4,000 original antique clock parts extensively photographed to show exact condition and specifications before purchase.
For projects requiring replacement movements, hands, pendulums, suspension springs, or other mechanical components, our detailed individual part photography eliminates the guesswork. Every piece in our inventory receives individual documentation showing its actual condition rather than generic stock photos, allowing you to buy with confidence.
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