Jauch Rack Strike Gathering Pallet Adjustment Complete Guide

Gathering pallet position adjustment challenges clockmakers because square arbor mounting prevents infinite rotational adjustment limiting pallet to four discrete positions - 90-degree increments - where proper synchronization between gathering pallet notch rack hook stop pin and warning wheel pin requires precise alignment rarely achievable through simple quarter-turn positioning alone. Common scenario after comprehensive movement overhaul including extensive bushing work is discovering gathering pallet seemingly misaligned where rack hook stop pin doesn't seat properly in pallet lockout notch creating concern about strike reliability despite mechanism functioning adequately during testing. However understanding that rack strike mechanisms use dual-locking system - gathering pallet provides primary strike termination while warning wheel pin provides secondary lock during warning position - reveals that slight pallet misalignment often proves acceptable if both locking functions operate reliably throughout complete strike cycle.

Distinguishing between cosmetic imperfection and actual functional problem represents critical diagnostic skill preventing unnecessary disassembly attempting to achieve perfect visual alignment when mechanism operates reliably with existing configuration. Gathering pallet serves dual functions - gathering rack teeth during strike execution advancing rack upward one tooth per strike plus providing lockout surface stopping strike train when rack reaches fully-lifted position indicating proper strike count completion. Stop pin on rack hook engages pallet lockout notch during final rack position creating visible mechanical lock though warning wheel pin simultaneously provides backup locking preventing train rotation if pallet lock proves marginal. This guide covers understanding rack strike warning system including dual-locking mechanism using both gathering pallet and warning wheel pin, evaluating whether gathering pallet position requires adjustment by testing complete strike cycle including warning entry and strike termination, repositioning gathering pallet through plate separation and gear remeshing when adjustment proves necessary, plus troubleshooting related issues including excessive pendulum leader play inadequate weight specifications and bushing-related power loss affecting reliable strike operation after comprehensive movement restoration.

Understanding Rack Strike Gathering Pallet Function

Gathering Pallet Dual Role

Gathering pallet serves two critical functions in rack strike mechanism - gathering rack teeth during strike execution plus providing lockout surface stopping strike train after proper count completion. During strike sequence, gathering pallet rotates continuously driven by strike train where pallet teeth sequentially engage rack teeth advancing rack upward one position per pallet revolution. Rack advancement continues until rack reaches fully-lifted position determined by rack tail resting on snail cam stepped surface corresponding to current hour. At this position, rack hook stop pin - small projection on rack hook assembly - drops into gathering pallet lockout notch creating mechanical interference preventing further pallet rotation stopping strike train after correct strike count.

Gathering pallet typically shows single lockout notch - flat or curved surface on pallet perimeter - sized to accept rack hook stop pin when rack reaches terminal position. Notch depth and width must provide adequate engagement ensuring reliable strike termination without excessive depth creating difficulty during warning release. Additionally pallet tooth count and spacing determines strike speed where typical gathering pallet uses 6-8 teeth creating smooth rack advancement without jerky motion. Pallet mounts on square arbor enabling only four discrete rotational positions - 0, 90, 180, 270 degrees - limiting adjustment flexibility compared to round arbor enabling infinite positioning. Therefore achieving optimal pallet alignment often requires gear remeshing rather than simple pallet repositioning on existing arbor orientation.

However recognize that gathering pallet lockout represents only one component of complete strike termination system. Warning wheel pin provides secondary locking function during warning position where pin engages warning lever creating backup lock preventing strike train rotation even if gathering pallet lock is marginal or temporarily disengaged. This dual-locking design provides reliability ensuring strike train cannot run continuously despite individual component failures or marginal adjustments. Therefore slight gathering pallet misalignment - where stop pin doesn't seat perfectly centered in lockout notch - often proves functionally acceptable if warning wheel pin lock operates reliably maintaining strike train control throughout complete operating cycle.

Warning System Operation

Rack strike mechanisms use warning system separating strike trigger from strike execution enabling smooth reliable operation. Warning occurs when lifting lever rises approximately 3-7 minutes before strike releasing warning lever and allowing strike train beginning rotation under mainspring power. However strike train doesn't execute immediately - instead it rotates until warning wheel pin contacts warning lever creating locked warning position. Strike train sits in warning with mainspring power applied creating tension ready for instant release when rack hook lifts at precise quarter-hour or hour position releasing both warning lever and gathering pallet lockout enabling strike execution.

During warning position, warning wheel pin provides primary strike train lock while gathering pallet may or may not be engaged depending on specific rack hook position and pallet orientation. This explains why gathering pallet visual appearance during warning may seem incorrect - stop pin might not engage pallet lockout notch during warning - though this represents normal condition for many rack strike designs. Critical requirement is that gathering pallet lockout engages properly during actual strike termination after rack reaches fully-lifted position. Warning position pallet engagement is secondary or even unnecessary because warning wheel pin provides adequate locking during this phase.

After warning period completes and minute hand reaches strike trigger position, rack hook lifts releasing both warning lever and any gathering pallet engagement enabling strike train executing its cycle. Gathering pallet rotates advancing rack upward through sequential tooth engagement. When rack reaches terminal position determined by snail cam, rack hook stop pin drops into gathering pallet lockout notch stopping further pallet rotation. Simultaneously or shortly thereafter, warning wheel completes rotation returning warning pin to position where warning lever will catch pin during next warning cycle. Therefore complete strike cycle involves multiple locking and unlocking sequences where gathering pallet and warning wheel pin work cooperatively rather than independently providing reliable strike control.

Square Arbor Position Limitations

Gathering pallet mounting on square arbor creates fundamental adjustment limitation where pallet can only assume four discrete rotational positions corresponding to 90-degree arbor increments. This contrasts with round arbor mounting enabling infinite rotational adjustment through controlled pressing achieving any desired pallet orientation. Square arbor design provides positive pallet retention preventing rotational slippage during operation though eliminates fine adjustment capability requiring gear remeshing if none of four available positions provides satisfactory alignment. Therefore clockmaker must evaluate whether one of four positions provides adequate function before attempting more involved adjustment through plate separation and gear repositioning.

Test all four pallet positions by removing pallet from square arbor - typically requires careful pulling using appropriate puller or dual-lever technique preventing arbor bending - then rotating pallet 90 degrees and reinstalling. However recognize that pallet square hole shows established wear pattern matching original arbor orientation where attempting installation at different rotation creates resistance as pallet tries to align with arbor flats. Gentle tapping during installation overcomes this resistance though excessive force risks enlarging pallet hole creating loose fit allowing rotational play during operation. Therefore limit position testing to perhaps 2-3 attempts before concluding that satisfactory alignment requires gear remeshing rather than simple pallet repositioning.

If testing reveals that none of four available positions provides satisfactory alignment, gear remeshing becomes necessary achieving desired pallet orientation relative to rack hook and warning wheel positions. This requires movement plate separation, removing gathering pallet arbor assembly, rotating arbor to different mesh position with driving pinion, then reassembling movement. However plate separation in movements showing extensive bushing work - perhaps 20-30 bushings as commonly required in worn movements - creates substantial reassembly challenges including proper gear meshing, maintaining correct endshake, and avoiding pivot damage during handling. Therefore attempt gear remeshing only when certain that current pallet position creates actual functional problem rather than mere cosmetic imperfection.

Evaluating Gathering Pallet Alignment

Functional Testing Versus Visual Appearance

Distinguish between functional problems requiring correction and cosmetic imperfections proving acceptable despite less-than-ideal visual appearance. Functional problem manifests as unreliable strike operation - perhaps strike continuing beyond proper count, strike failing to execute despite warning entry, or erratic strike behavior varying between cycles. Cosmetic imperfection shows visually-imperfect alignment during static observation though mechanism operates reliably throughout complete strike cycle including consistent strike counts, prompt strike execution, and proper warning entry and release. Many gathering pallet installations showing apparently-incorrect alignment during casual observation prove perfectly functional during operational testing requiring no adjustment despite initial appearance suggesting misalignment.

Test gathering pallet function by manually advancing strike mechanism through multiple complete cycles observing strike termination reliability. Advance minute hand approaching strike trigger position then allow strike executing while observing rack advancement and gathering pallet rotation. Verify that strike terminates promptly after correct count without hesitation or overrun. Repeat test through complete twelve-hour cycle confirming reliable operation at all strike counts from one through twelve. Additionally test warning entry by advancing minute hand to warning position verifying strike train reaches warning without binding or hesitation. If all functional tests pass successfully despite visually-imperfect pallet alignment, adjustment is unnecessary - mechanism operates reliably with existing configuration.

However if functional testing reveals problems - inconsistent strike termination, occasional overrun, or warning entry failures - gathering pallet position likely requires adjustment. Before concluding pallet position causes problem, verify other potential issues including inadequate weight providing insufficient power, excessive friction from tight bushings or inadequate lubrication, or damaged components including bent rack teeth or worn gathering pallet teeth. Only after eliminating these alternative causes should you attempt gathering pallet repositioning through either testing alternative square arbor positions or undertaking plate separation for gear remeshing. This systematic approach prevents unnecessary complex work addressing non-problematic pallet alignment while actual issue lies elsewhere in strike mechanism or movement.

Stop Pin Engagement During Strike Termination

Critical evaluation point is stop pin engagement during actual strike termination rather than during warning position or other intermediate positions throughout strike cycle. During strike termination after rack reaches fully-lifted position, rack hook stop pin must drop into gathering pallet lockout notch creating positive mechanical interference stopping pallet rotation. Adequate engagement shows stop pin seated in notch with visible clearance preventing pin contacting notch edges during normal operation though providing secure lock preventing pallet rotation under strike train power. Marginal engagement shows stop pin barely entering notch or contacting notch edge creating concern about reliability though often proving adequate if warning wheel pin provides backup locking.

Observe stop pin engagement by manually advancing strike to termination position then examining pallet-pin relationship. Stop pin should rest comfortably in lockout notch without forcing or binding. Additionally test lock security by attempting to rotate gathering pallet manually while rack holds terminal position - pallet should resist rotation indicating positive lock. If pallet rotates easily despite rack position, lockout engagement is inadequate requiring adjustment. However if visual appearance shows less-than-perfect alignment but manual testing confirms secure locking, adjustment is unnecessary because functional requirement is met despite cosmetic imperfection.

Additionally consider that stop pin engagement may appear different during warning position compared to strike termination position because rack hook position varies between these phases. During warning, rack may be partially lowered creating different pin-pallet relationship compared to fully-lifted rack at strike termination. Therefore don't evaluate pallet alignment solely based on warning position appearance - complete strike cycle observation including strike termination provides definitive assessment of alignment adequacy. Many installations showing poor alignment during warning prove perfectly adequate during actual strike termination where functional locking requirement exists.

Warning Wheel Pin Function

Verify warning wheel pin operates properly providing backup locking during warning position plus contributing to overall strike train control throughout cycle. Warning wheel pin - small projection on warning wheel - must engage warning lever during warning entry creating secure lock preventing strike train rotation until rack hook lifts releasing warning lever. Test warning wheel pin function by advancing strike mechanism to warning position then attempting manual rotation of strike train. Strike train should resist rotation indicating warning lever securely engages warning pin. If strike train rotates freely during warning, warning lever position requires adjustment or warning pin is damaged requiring repair or replacement.

Warning wheel pin also participates in strike termination sequence though timing and interaction varies by specific movement design. Some designs use warning pin as primary lock during final strike rotation where gathering pallet lockout engages first followed shortly by warning pin reaching warning lever position creating dual lock. Other designs use gathering pallet as primary termination lock while warning pin simply maintains warning position awaiting next cycle. Understand your specific movement design through careful observation during complete strike cycle noting sequence of locking events and relative timing between gathering pallet engagement and warning pin positioning.

If warning wheel pin provides adequate locking function throughout cycle, gathering pallet alignment becomes less critical because warning pin compensates for marginal pallet engagement. This explains why many movements operate reliably despite visually-imperfect gathering pallet alignment - warning wheel pin maintains strike train control even when pallet lock appears marginal. Therefore before undertaking gathering pallet repositioning work, verify warning wheel pin function provides adequate backup locking potentially rendering pallet adjustment unnecessary despite less-than-ideal visual appearance during static observation.

Gathering Pallet Repositioning Procedures

Testing Alternative Pallet Positions

Attempt gathering pallet repositioning through testing alternative square arbor orientations before undertaking plate separation for gear remeshing. Remove gathering pallet from square arbor using appropriate puller or dual-lever technique preventing arbor bending during extraction. Small gear puller with jaws engaging pallet hub provides controlled removal force though many clockmakers successfully use two small screwdrivers or paint can openers as levers prying pallet upward from opposite sides creating even lifting force. Apply gradual steady pressure avoiding sudden jerking potentially bending delicate arbor. If pallet resists removal, verify no retaining pin or set screw secures pallet to arbor then apply additional controlled force until pallet releases.

After pallet removal, rotate pallet 90 degrees attempting installation at new orientation. Align pallet square hole with arbor flats then press pallet onto arbor using gentle tapping with appropriate drift or soft-face hammer. However recognize that pallet square hole shows established wear pattern from original installation where hole corners may be slightly rounded matching specific arbor orientation. Attempting installation at different rotation encounters resistance as pallet tries to find original orientation. Moderate tapping overcomes this resistance seating pallet at new position though excessive force risks enlarging hole creating loose fit. Test resulting alignment after each repositioning attempt verifying whether new orientation provides improved stop pin engagement compared to original position.

Limit repositioning attempts to 2-3 cycles testing all four possible orientations before concluding that satisfactory alignment requires gear remeshing. Repeated removal and installation progressively damages pallet square hole enlarging opening and rounding corners eventually creating loose fit allowing rotational play during operation. If loose fit develops, pallet replacement becomes necessary obtaining new pallet from parts supplier or donor movement. Therefore exercise restraint during position testing avoiding excessive attempts that damage pallet beyond serviceability while providing no satisfactory alignment solution.

Plate Separation and Gear Remeshing

If alternative pallet positions prove unsatisfactory, plate separation and gear remeshing enables achieving desired pallet orientation though this represents substantial undertaking particularly in movements showing extensive bushing work. Movement showing 20-30 new bushings requires careful plate separation preventing bushing damage plus meticulous reassembly maintaining proper gear mesh and endshake relationships. Additionally small delicate pivots common in economy movements like Jauch 77 show vulnerability to bending during handling requiring extreme care throughout disassembly and reassembly process. Therefore attempt plate separation only when confident that current pallet position creates actual functional problem justifying intervention risks.

Begin plate separation by removing all external components including hands, dial, pendulum, and weights. Let down mainspring power on both time and strike trains preventing sudden movement during plate separation. Remove movement from case if not already on bench then carefully separate plates working incrementally around perimeter loosening plate screws gradually. As plates separate, support all wheels preventing pivots bending or falling creating damage or loss. After plates separate sufficiently, identify gathering pallet arbor and driving pinion noting current mesh position. Remove gathering pallet arbor completely then rotate to different mesh position - typically one tooth different from original - creating pallet rotational change enabling improved alignment with rack hook and warning wheel.

Reassemble movement following reverse disassembly sequence ensuring proper gear mesh throughout. Pay particular attention to maintaining correct endshake at all pivots - typical endshake is 0.003 to 0.006 inch providing free rotation without excessive axial play. Additionally verify proper gear mesh depth avoiding too-tight mesh creating excessive friction or too-loose mesh creating weak drive and potential tooth skipping. Test gathering pallet alignment during reassembly before final plate tightening enabling minor mesh adjustment if initial positioning proves unsatisfactory. After complete reassembly, perform comprehensive operational testing including complete twelve-hour strike cycle verifying reliable operation at all counts confirming successful gathering pallet repositioning achieving desired alignment and function.

Related Troubleshooting Issues

Pendulum Leader Play

Excessive pendulum leader play in crutch fork wastes pendulum amplitude reducing available impulse for escapement operation potentially causing clock stopping after initial successful operation following overhaul. Adjustable beat leaders common in some movements including certain Jauch models use slotted design enabling beat adjustment through leader rotation though creating substantial clearance between leader and crutch fork enabling undesirable side-to-side motion. Leader should engage crutch fork with minimal play - perhaps 0.010 to 0.020 inch total clearance - providing adequate freedom preventing binding while minimizing wasted motion during pendulum swing.

Identify excessive leader play by observing pendulum operation noting side-to-side leader motion within crutch fork before actual pendulum impulse begins. Excessive play appears as visible gap where leader moves substantially before engaging fork creating delayed impulse transmission. Additionally listen for clicking or tapping sounds during pendulum operation indicating leader striking fork sides during swing rather than maintaining centered engagement. Correct excessive play by either replacing leader with properly-fitted alternative, modifying crutch fork narrowing slot to reduce clearance, or in adjustable leaders repositioning thicker portion of leader engaging crutch fork rather than thin adjustment section.

For adjustable beat leaders showing excessive play, verify proper assembly where thicker leader portion should engage crutch fork rather than thin section designed for beat adjustment only. Some leaders use stepped design where thick cylindrical section provides crutch engagement while thin extension enables beat adjustment. Improper assembly positions thin section in crutch creating excessive play. Correct assembly by either shortening suspension spring raising leader until thick section engages crutch or bending crutch fork downward engaging thick leader section. After correction, verify beat remains accurate requiring readjustment if crutch repositioning affects beat relationship.

Weight Specification and Power Issues

Inadequate weight specification creates marginal power delivery potentially causing clock operation during initial testing but failure after extended operation particularly approaching end of winding cycle when mainspring power decreases. Many movements specify weight requirements though specifications may be unavailable for economy movements or kit clocks requiring empirical testing determining adequate weight. Additionally recognize that comprehensive bushing work potentially increases friction compared to original worn condition requiring heavier weights maintaining adequate power despite improved pivot fit creating higher initial friction before bushings wear to optimal clearance.

Test weight adequacy by observing clock operation throughout complete winding cycle noting whether clock maintains reliable operation or shows degraded performance approaching run-down. Clock stopping after several days operation despite running well immediately after winding suggests marginal power where reduced mainspring force approaching end of cycle proves insufficient maintaining operation. Increase weight incrementally - perhaps one pound additions - testing operation after each increase until clock maintains reliable operation throughout complete cycle. However recognize that excessive weight accelerates wear particularly in freshly-bushed movements requiring break-in period establishing optimal pivot-bushing relationship.

Consider that original weight specifications may have contributed to excessive wear necessitating extensive bushing work. Therefore restoring original weight specifications potentially recreates conditions causing original deterioration. Use minimum weight enabling reliable operation throughout cycle rather than maximum weight specification providing excessive power accelerating wear. Additionally verify that strike mechanism operates at reasonable speed without excessive velocity suggesting over-weighting creating unnecessarily aggressive operation. Proper weight balance provides adequate power for reliable timekeeping and strike operation while minimizing wear maximizing service interval before next overhaul becomes necessary.

Bushing-Related Power Loss

Comprehensive bushing work - perhaps 20-30 bushings as required in severely-worn movements - potentially creates excessive friction if bushings are fitted too tightly or lack proper chamfering and lubrication. New bushings show tighter fit compared to worn original holes requiring additional power during initial operation until bushings wear to optimal clearance establishing proper running fit. Additionally bushing installation without proper chamfering creates sharp edges at bushing ends binding pivot during endshake motion increasing friction. Inadequate lubrication exacerbates friction particularly in freshly-bushed movements requiring generous oil application enabling proper break-in.

Evaluate bushing fit by testing individual wheel rotation observing smooth free movement without binding or excessive friction. Each wheel should spin freely showing gradual deceleration from initial impulse rather than abrupt stopping indicating excessive friction. Additionally check pivot appearance under magnification after brief operation noting oil film indicating proper lubrication. Dry appearance or excessive oil displacement suggests inadequate lubrication or improper bushing fit preventing oil retention. Verify endshake at each bushed pivot confirming 0.003 to 0.006 inch clearance enabling free axial movement without binding.

Correct overly-tight bushings by careful reaming using appropriate bushing reamer or broach enlarging hole slightly improving pivot clearance. Make very small corrections testing fit frequently avoiding excessive material removal creating loose fit requiring bushing replacement. Additionally verify proper chamfering at both bushing ends using appropriate chamfering tool or countersink creating smooth entry preventing pivot shoulder binding. Apply adequate lubrication using appropriate clock oil ensuring oil penetrates bushing-pivot interface providing proper film reducing friction. After corrections, allow break-in period - perhaps several days operation - establishing optimal running fit before final evaluation of movement performance and power requirements.

FAQs

Why won't my gathering pallet align properly on square arbor?

Gathering pallet won't align properly on square arbor because square mounting limits pallet to four discrete rotational positions at 90-degree increments where achieving optimal alignment between pallet lockout notch rack hook stop pin and warning wheel pin often requires intermediate position unavailable with square arbor design. This fundamental limitation means none of four available pallet positions may provide perfect visual alignment though one position typically provides adequate functional performance despite imperfect appearance. Test all four positions by removing pallet rotating 90 degrees then reinstalling though recognize that pallet square hole shows established wear pattern from original installation where attempting different orientation creates resistance requiring gentle tapping overcoming hole-arbor mismatch. If testing reveals no satisfactory position achieving adequate stop pin engagement during strike termination plate separation and gear remeshing becomes necessary rotating gathering pallet arbor to different mesh position with driving pinion enabling pallet orientation unavailable through simple repositioning. However before undertaking plate separation verify that current pallet position actually creates functional problem rather than mere cosmetic imperfection because many installations showing visually-imperfect alignment prove perfectly reliable during operational testing where warning wheel pin provides backup locking compensating for marginal pallet engagement. Therefore distinguish between functional problems requiring correction and acceptable cosmetic imperfections avoiding unnecessary complex work attempting to achieve perfect visual alignment when mechanism operates reliably with existing configuration.

How do I know if gathering pallet position is good enough?

Know if gathering pallet position is good enough by performing comprehensive functional testing through complete strike cycle confirming reliable strike termination warning entry and consistent operation at all counts from one through twelve rather than relying solely on visual assessment of static alignment. Manually advance strike mechanism through multiple complete cycles observing whether strike terminates promptly after correct count without hesitation overrun or premature termination. Test at all hours throughout twelve-hour cycle because some marginal conditions only manifest at specific counts where rack position warning wheel timing or other variables combine creating problems invisible at other counts. Additionally verify warning entry operates smoothly without binding or hesitation where strike train should reach warning position reliably awaiting final trigger for strike execution. If all functional tests pass successfully despite visually-imperfect pallet alignment showing stop pin not perfectly centered in lockout notch adjustment is unnecessary because mechanism operates reliably meeting functional requirements. However if testing reveals problems including inconsistent strike termination occasional overrun or warning entry failures gathering pallet position likely requires adjustment. Before concluding pallet causes problem verify other potential issues including inadequate weight providing insufficient power excessive friction from tight bushings or damaged components including bent rack teeth or worn pallet teeth. Only after eliminating alternative causes should you attempt pallet repositioning through testing different square arbor orientations or undertaking plate separation for gear remeshing. Remember that dual-locking system using both gathering pallet and warning wheel pin provides reliability where adequate warning wheel pin function often compensates for marginal pallet alignment rendering adjustment unnecessary.

Should I separate plates to reposition gathering pallet?

Separate plates to reposition gathering pallet only when certain that current position creates actual functional problem manifesting as unreliable strike operation and after exhausting simpler solutions including testing all four available square arbor positions plus verifying warning wheel pin provides adequate backup locking potentially compensating for marginal pallet alignment. Plate separation in movements showing extensive bushing work represents substantial undertaking requiring careful handling preventing pivot damage plus meticulous reassembly maintaining proper gear mesh and endshake relationships throughout movement. Additionally small delicate pivots common in economy movements show vulnerability to bending during handling creating risk of damage requiring costly repair or replacement. Therefore attempt plate separation only when confident that intervention benefits justify risks where reliable strike operation proves unattainable with existing pallet position despite proper weight specification adequate lubrication and verified warning wheel pin function. Before separation perform comprehensive diagnostic testing confirming that gathering pallet position represents actual problem source rather than symptom of other issues including inadequate power excessive friction or damaged strike components. If testing conclusively demonstrates pallet position prevents reliable operation proceed with plate separation following systematic approach supporting all wheels during separation rotating gathering pallet arbor to different mesh position then carefully reassembling verifying proper gear mesh and endshake at all pivots. However if functional testing shows acceptable operation despite visually-imperfect alignment avoid unnecessary plate separation accepting cosmetic imperfection because mechanism meets functional requirements without intervention risks.

How much pendulum leader play is acceptable?

Acceptable pendulum leader play in crutch fork is minimal - approximately 0.010 to 0.020 inch total clearance - providing adequate freedom preventing binding while minimizing wasted motion during pendulum swing that reduces effective impulse delivery to escapement. Excessive play appears as visible gap where leader moves substantially side-to-side before engaging fork creating delayed impulse transmission plus potential clicking or tapping sounds during operation indicating leader striking fork sides rather than maintaining centered engagement. This wasted motion reduces pendulum amplitude potentially causing clock stopping particularly after initial successful operation following overhaul where marginal power delivery proves adequate during testing but fails during extended operation. Adjustable beat leaders common in some movements use slotted design enabling beat adjustment though creating substantial clearance between leader and fork. Proper assembly positions thick cylindrical leader section in crutch fork rather than thin adjustment extension providing minimal play. If excessive play exists due to improper assembly correct by either shortening suspension spring raising leader until thick section engages crutch or bending crutch fork downward engaging thick leader portion. For non-adjustable leaders showing excessive play consider leader replacement with properly-fitted alternative or modify crutch fork narrowing slot to reduce clearance though exercise caution avoiding excessive narrowing creating binding preventing free leader movement. After correction verify beat remains accurate requiring readjustment if crutch repositioning affects beat relationship plus test pendulum amplitude ensuring adequate swing maintaining reliable escapement operation throughout complete winding cycle.

Why does clock stop after running several days following overhaul?

Clock stops after running several days following overhaul because marginal power delivery proves adequate under high-power conditions immediately after winding but fails as mainspring force decreases approaching end of winding cycle where reduced available power proves insufficient overcoming friction or achieving adequate escapement impulse. Common causes include inadequate weight specification providing marginal power, excessive friction from overly-tight bushings preventing optimal pivot clearance, inadequate lubrication increasing friction particularly in freshly-bushed movements, or excessive pendulum leader play wasting amplitude reducing effective impulse delivery. Additionally comprehensive bushing work creates tighter pivot fit compared to original worn condition requiring additional power during initial operation until bushings wear to optimal clearance establishing proper running fit. Test weight adequacy by observing operation throughout complete cycle noting whether degraded performance or stopping occurs approaching run-down. Increase weight incrementally testing after each addition until clock maintains reliable operation throughout cycle though avoid excessive weight accelerating wear. Evaluate bushing fit testing individual wheel rotation observing smooth free movement plus checking pivot appearance under magnification confirming proper oil film indicating adequate lubrication. Verify endshake at each bushed pivot confirming 0.003 to 0.006 inch clearance enabling free movement. Correct overly-tight bushings through careful reaming plus verify proper chamfering at bushing ends preventing pivot shoulder binding. Additionally check pendulum leader play in crutch fork minimizing wasted motion maximizing effective amplitude. Allow adequate break-in period perhaps several days operation establishing optimal running fit before final evaluation. If problems persist despite corrections consider that movement design may have marginal power reserves requiring careful optimization of all friction points achieving reliable operation within available power budget.

What weight specifications should I use after extensive bushing work?

Use minimum weight specification enabling reliable operation throughout complete winding cycle rather than maximum specification providing excessive power that potentially accelerates wear particularly in freshly-bushed movements requiring break-in period establishing optimal pivot-bushing relationship. Determine adequate weight through empirical testing starting with manufacturer specifications if available then adjusting based on observed performance. If original specifications are unavailable start with conservative estimate perhaps 5-6 pounds for typical weight-driven movement then increase incrementally perhaps one-pound additions testing operation after each increase until clock maintains reliable timekeeping and strike operation throughout cycle. However recognize that original weight specifications may have contributed to excessive wear necessitating comprehensive bushing work therefore blindly restoring original weights potentially recreates conditions causing deterioration. Additionally comprehensive bushing work potentially increases initial friction compared to worn original condition requiring temporarily heavier weights during break-in period then reducing weight after bushings wear to optimal clearance. Test weight adequacy by observing operation throughout complete cycle noting whether clock maintains consistent performance or shows degraded operation approaching run-down suggesting marginal power. Additionally verify strike mechanism operates at reasonable speed without excessive velocity indicating over-weighting. Proper weight balance provides adequate power for reliable operation while minimizing wear maximizing service interval before next overhaul. Consider that movements showing extensive wear requiring 20-30 bushings likely experienced inadequate maintenance or excessive operating stress suggesting conservative weight specification prevents recurrence. Monitor performance during initial weeks after overhaul adjusting weight as needed based on actual operational requirements rather than theoretical specifications.