[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-661776-105":59,"doc-detail-661776-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","accutronseries-221-replacing-the-stem-important","ACCUtRON—SERIES 221 - REPLACING THE STEM - IMPORTANT","","Technical letter describing ACCUTRON Series 221 watch service procedures, focusing on stem replacement, power cell replacement, crown replacement handling, and regulation. Provides step-by-step instructions for removing and reinstalling the stem using proper screwdriver technique, safe handling of strap and insulation components, and checks to ensure correct electrical contact and avoidance of shorts. Includes guidance for power cell removal and reinstallation, snapping models and water-resistant case back handling, plus movement characteristics and regulation limits for tuning fork rate adjustments.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/accutronseries-221-replacing-the-stem-important/661776/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/accutronseries-221-replacing-the-stem-important/661776.png","ImageObject",300,407,{"name":92,"@type":93},"Riley West","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-28",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Where is the Setting Lever Screw located and why does screwdriver shape matter?","Question",{"text":112,"@type":113},"The Setting Lever Screw is located between the spring arms of the electrical disconnect switch. A well-formed screwdriver blade is important to avoid distorting the springs.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What steps are required to replace the Power Cell in ACCUTRON Series 221?",{"text":117,"@type":113},"Clean the case exterior, open the case, remove the movement and position it in the bezel, swing the cell strap away without loosening screws, invert the movement so the cell falls out, inspect and wipe contacts, insert the new ~1.35V cell with the imprinted side down, then fully engage the strap into the hold down post.",{"name":119,"@type":110,"acceptedAnswer":120},"How is regulation adjusted for the 221 tuning fork movement?",{"text":121,"@type":113},"The regulators use eight divisions; each division corresponds to a two-seconds-per-day change in tuning fork rate. Move a regulator one division away from the movement center to slow by two seconds per day, or toward the center to speed by two seconds per day, using light pressure on the regulator “ears.”","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},661776,1793180176,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":144},1099523885074,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","O  \n# ACCUTRON—SERIES 221\n\nREPLACING THE STEM(Part\\#176)  \n## IMPORTANT:\n\nThe Setting Lever Screw is located between the spring arms of the electrical disconnect switch.In order not to distort these springs,it is important to use a well-formed screwdriver blade.60 mmin width.  \nThe pawl bridge assembly has a circular cutout allowing for easy access to the screw head.Caremust be taken not to inadvertently alter the location of this assembly.  \n1.Pull the stem to the \"setting position\"to assist in removal and replacement.  \n2.Unscrew the setting lever screw two to three full turns.  \n3.Keeping pressure on the screwdriver,gently ease the stem out.  \n## TO REPLACE\n\n1.Press in the screw slot with screwdriver and ease the stem in to place,rotating so as to properlyengage the setting pinion.  \n2.Tighten the setting lever screw.Check for correct operation.  \nImportant:If the screw head has been damaged,make surethat there are no metal slivers touching theswitch springs,causing a short circuit.  \nWHEN REPLACING THE CROWN  \n1.Use a chuck-type pin vise to hold the stem on the bearing surface,not by the square.  \n2.Tighten the crown using normal watchmaker care,so as not to twist or bend the stem.  \nImportant:The dust cover of the crown should be in lightcontact with the bezel.The crown should neverbe jammed up against the case,nor so far from itthat there is a visible separation of the bezel andthe dust cover.  \nCorrect replacement of the Power Cell does not require loosening Screw\\#306.The Cell Strap\\#141 should be rotated out of position as outlined in Technical Letter\\#19.  \nShould a movement be brought in for repair,missing the Cell Strap\\#141,the Insulator\\#610,or Screw \\#306,these parts may be purchased through your local Authorized BulovaMaterial Distributor.  \nC  \n0  \n# ACCUTRON°-SERIES 221\n\n## REPLACING THE POWER CELL\n\n1.  Clean and wipe away any accumulated material from exterior of case (to prevent dirt from enteringmovement when case is opened).  \n2.   Open the case.Apply a case knife at the groove provided.For water-resistant models,use a suit-able case wrench.  \n3.   Remove movement from the case back and place in bezel.This is not necessary on water-resistantmodels.  \n4.  Insert a pointed tool in the hole near the end of cell strap(\\#141).Apply downward pressure andswing strap away from cell.Do NOT loosen any screws for this operation.  \n5.   Invert movement and power cell will fall out.  \n6.Inspect for foreign material in cell compartment or on underside of cell strap.Wipe suface,asnecessary,to assure good electrical contact.Do NOT scrape away red insulation on cell strap.  \n7.  Check new power cell (Approximately 1.35 volts).  \n8.   Insert power cell with imprinted side facing down.  \n9.  Reposition cell strap into insulator No.610.Swing strap into hold down post,applyingdownward pressure with a pointed tool in the hole near the end of the strap.Make sure thestrap is FULLY ENGAGED into the hold down post.  \n10.  Snap-back models:Remove movement from bezel,PLACE IN CASE BACK,pull crown to settingposition,snap bezel and case together by applying pressure first on the 12 o'clock side and THENSNAP6O'CLOCK SIDE INTO PLACE.  \nWater-resistant models:Retighten case back with a suitable case wrench,making sure case gasketis properly positioned.  \n   BULOVA WATCH COMPANY.INC..62-10 Woodside Ave..Woodside.N.Y.11377●212-335-6000.Ext.775.776     \n## REGULATION\n\nMOVEMENT CHARACTERISTICS  \nThe 221 Accutron regulators are calibrated with eight divisions toprovide for easy reference during regulation.Their appearance issimilar to the214/218 Series.Each division represents twoseconds per day change in rate of the tuning fork.  \nTuning Fork -172 mm.  \nFrequency -440Hz.(cycles per second).This is the tone ofof \"A\".  \n100  \nMovement Dimensions -Tonneau Shape-7Y2×8y2 ligne  \nTo regulate two seconds per day slower,move either regulatorone division away from the center of the movement.(See Illus-tration)  \n-19.4 mm.(.763\")long×17.4(.685'\")wide ","cbCairhCaLLleWsK","https://ap.wps.com/l/cbCairhCaLLleWsK","pdf",7091728,11,"English","# REPLACING THE STEM\n## IMPORTANT\n# TO REPLACE\n# WHEN REPLACING THE CROWN\n# REPLACING THE POWER CELL\n## REGULATION\n## MOVEMENT CHARACTERISTICS\n# FEATURES\n# SETTING INSTRUCTIONS\n# SERVICING","[{\"question\":\"Where is the Setting Lever Screw located and why does screwdriver shape matter?\",\"answer\":\"The Setting Lever Screw is located between the spring arms of the electrical disconnect switch. A well-formed screwdriver blade is important to avoid distorting the springs.\"},{\"question\":\"What steps are required to replace the Power Cell in ACCUTRON Series 221?\",\"answer\":\"Clean the case exterior, open the case, remove the movement and position it in the bezel, swing the cell strap away without loosening screws, invert the movement so the cell falls out, inspect and wipe contacts, insert the new ~1.35V cell with the imprinted side down, then fully engage the strap into the hold down post.\"},{\"question\":\"How is regulation adjusted for the 221 tuning fork movement?\",\"answer\":\"The regulators use eight divisions; each division corresponds to a two-seconds-per-day change in tuning fork rate. Move a regulator one division away from the movement center to slow by two seconds per day, or toward the center to speed by two seconds per day, using light pressure on the regulator “ears.”\"}]","ACCUtRON—SERIES 221 - REPLACING THE STEM - IMPORTANT | PDF",28]