SERVICE MANUAL SINGER MACHINES of CLASSES 600 anv 603 Machine 603 THE SINGER COMPANYDESCRIPTION Machine 600 For straight, zigzag ond decorative stitching. Gear driven lockstitch machine with built-in motor ‘and built-in light. Single or two needle stitching using Needle Cetalog 2020 - threaded from front to bock. Needle bar and presser bor inclined af 9 degrees from vertical. Machine is fitted with seven built-in cams ond one removable "'Speciel” com. (17 odditional "'Spe+ iol” coms supplied with machine.) Two cam selector levers and o stitch width (bight) lever loceted ot front of com. Lower lever controls teor cam follower; upper lever controls front cam follower. Bight lever controls position of needle during stight stitching and width of primary pot- terns; also produces variations of combination pate terns. Reversible feed - groduated stitch length in- icotor plate provides for delicate adjustment of stitch lengths above 20 ond positive locked setting ‘of maximum stitch length. Gear driven rotary hook on vertical oxis, located in front of needle, mokes two revolutions per stitch. Sewing reel eliminates bobbin and bobbin winder; Gallows reel to be wound in the machine. Reel Wind Push Button, switches from sew to wind instontly. Maximum width of zigzog stitch, approximately 3/16 inch. Numerically graduated thread tension device, with central spacing disc for two needle threads. Automatic thread control ensures smooth flow of thread from spool to needle for uniform stitch setting. Throat plate positioning lever locks throat plate in down position for general sewing, raises throat plote sufficiently for daming or embroidery, ond unlocks throat plate for easy removal. Hinged foce plate houses threading chert ond swings open for easy access to oiling points. Built-in eye-level stitch chart for reference. Dial-operated pressure adjustment. Single 4:pin terminal connection beneath machine bed and out of view of operator. Maximum stitch length 6 per inch. Needle bar stroke-1-9/64 inches. Presser bor lift - 5/16 inch. Bed - 16-1/2 inches long, 7 inches wide. Working space at right of needle - 7-3/16 inch Speed - up to 1500 R. P.M. Machine 603 Machine 603 has the same basic characteristics of Machine 600 with the following exceptions: Machine has accommodation for only one bokelite cam (FASHION DISC) which is manuclly inserted intg the machine, 21 FASHION DISCS ore supplied Stitch width (bight) lever, loceted on front of arm, regulates width of zigzog and decorative stitch up to 3/16 inch width. Straight stitching is eccom- plished with bight lever in “'S" position. Needle position selector located to left of bight lever locates stitching in LEFT, CENTER, or RIGHT position of needle ot widths less thon *5".INSPECTION AND LUBRICATION Before any extensi to find € thoroughly lad Remove all lint, dust or other foreign particles from around hook, feed dog and reel case. Remove reel case and clean in varsol. Open inspection is undertaken face plate and clean out any lint or woste that may have collected oround needle ber, presser bar and pressure regulator. CLEAN Remove arm cover by first loosening arm cover screw and then sliding cover forword and up. Wipe off any oil or grease that may have accumu lated on orm and bed covers. Oil machine as instructed below and on page 5. Apply one drop of oil to the well in the casting below the reel driver and hook body. ARM COVER SCREWOpen face plate and oil the ploces indicoted. Apply @ small amount of oil fr lubricant to each of the points in- dicated inside machine arm. Uf. poe (Waa A J oan \ qLje hl AS LOSS yack and loosen four screws at Oil each of the places indicated and apply Gear cor ver. Remove bed cover Lubricant to the two sets of gears. THE MOTOR fror REQUIRES NO LUBRICATION. Replace arm top cover and bed cover. 5PRESSER BAR BUSHING SET SCREW THREAD PRESSER BAR qimes GUIDE BRACKET PRESSER BAR BUSHING ‘GUIDE BRACKET SET SCREW Removal and Replacement Remove presser foot and thumb screw. Lower presser bar and turn pressure diol to "'D"” setting. Remove two regulotor serews on left side of bracket and remove pressure dial assembly, extension pin ond spring. Loosen bracket set screw and remove presser bor guide bracket. Loosen bushing set screw and remove presser bar bushing, thread guide and presser bor. Replace presser bar assembly in reverse order of its removal. Replace thread guide as instructed on page 7. With pressure dial set at "D"", replace dicl making certain that extension is seated against outside cam surface of dial. Then fasten bracket with two regulator screws. Adjust presser foot height as instructed. -@ ee] Adjustment Presser Bor Height When setting presser foot height, throat plate must be locked in position for general sewing. When presser foot is raised to highest point, distance between bottom of presser foot and top surface of throat plate should be 5/16 inch. Presser foot should be in alignment with throat plate slots ond feed dog os shown. Inset shows correct alignment of presser foot with needle, SETTING: Loosen guide bracket set screw shown ond raise or lower presser bar os required to obtain correct height. ‘Align presser foot with throat plate slots ond needle. Securely tighten guide bracket set screw. NOTE: Unless presser foot height is correctly set, needle shank or needle clamp may strike presser foot when reel is being wound.Removal Remove needle, presser foot, throot plate, bed slide, bobbin case, cushion spring bracket, and po- sition finger. Remove bed cover. ed lifting rock shaft ond feed rock s illustrated on page 6 cetuating lever assembly ond bobbin driver os instructed on page 10, With grease pencil or magic marker, mark the two {gears os illustrated. (Mork one tooth of one gear, ond the corresponding space for thot tooth in the other ear.) This assures proper mesh when replacing. Loosen set screw in vertical gear, ond remove sear from hook shaft. Lift rotating hook assembly from machine. Remove Replacement Install roteting hook ossembly into. machin Using the guide marks previously made, mesh vert cal gear with horizontal gear. Turn vertical hook shaft until flat side of shaft is under set screw in gear, ond tighten set screw securely. Replace bobbin dri ing lever assembly as instructed on Replace feed rock shoft and shoft with pull-off finger as instructed on page 8. Check ond adiust hook as instructed on poges 8 ond 9 Replace all other ports previously instructed for removal, except in reverse order. winder aetvat- THE ROTATING HOOK ROTATING HOOK VERTICAL GEAR SET SCREWROTATING HOOK (CONT'D) NEEDLE BAR UPPER TIMING: BUSHING. MARK LOWER TIMING MARK Hook POINT, ALIGNED WITH NEEDLE To Time The Hook Set needle bor at correct height, and time the needle bor vibrating mechonism as instructed on pages 7 ond 8, Service Manual for Classes 600 ond 603 Machine Insert @ Size 18 needle up into the needle clamp. Remove throat plate, bed slide, bobbin case ond bot- tom cover. It is not necessory to remove the feed dog to time the hook. ‘Adjust machine for straight stitching in center needle position (AK3). Tum hand wheel over toward operator until the needle bar is ot lowest position. Observe position of upper timing mork in relotion to needle bar bushing Tum hand wheel over toward operator until lower timing mork is in the some position. The point of the hook should be at center of needle as illustrated. To adjust, loosen the two set screws in horizon- tal gear. While maintaining position of needle bor, turn vertical gear ot hook end of shaft until point of hook is in correct position. Then, tighten the two gear set screws securely, making certain thot gears ore correctly meshed without binding. Coution: Hub of horizontal gear should not con- tact face of bushing. Replace throat plote, slide plate, bobbin cose and bottom cover. HORIZONTAL GEAR VERTICAL GEAR SET SCREWS (TIMING GEAR) iF O S oD (| i 3 . i ° iS OL GEAR HUB SHOULD NOT CONTACT FACE OF BUSHINGROTATING HOOK (CONT'D) To Position Hook to or from Needle Set needle bor at correct height, and time the hook os previously instructed. Turn hand whee! until point of hook is directly behind needle. When correctly set, the distance be- ieee tween the needle and the hook point should be opprox- oe imately 0.005 inch, as illustrated. pra SETTING: With bobbin winder actucting lever in wind- ing position, remove locator nut by turning in a clock- wise direction. Remove bobbin winder actucting lever assembly (see instructions on page 10), and remove locator. Corefully mark the two gears, as illustrated, to ‘essure proper meshing of gears when replacing. Then loosen set screw in vertical hook shaft gear and re~ move from shoft. Loosen set screw holding the eccentric bushing. Turn the eccentric bushing while maintaining position ‘of hook, until correct distance between needle and point of hook is attaine: Replace gear using the previously made guide marks to assure correct meshing of gears. Replace ll other ports in reverse order as in- structed for removal. Set winding mechanism as in- structed on poge 10, Covtion: Check for binding or end play in hook driving shaft. For adjustment and removal, see page 24 of Service Manval for 600 and 603 Machines, ond age 7 of this supplement for removal of hook. NEEDLE ——— SETSCREW ECCENTRIC VERTICAL GEAR \ BUSHING = SET SCREW) =3 086M WINDER ACTUATING | LEVER ASSEMBLY LOCATOR NUTWINDING MECHANISM BOBBIN WINDER LIFTING BRACKET LocaTor NUT BOBBIN DRIVER. e S o BOBBIN WINDER ACTUATING SHAFT Locator - LIFTING BRACKET ea ser seats © bocaTOR wuT 10 Bobbin Actuatin Removal and Replacement Open slide plate. Ley machine on beck and re- move bed cover from machine. Loosen set screw on cam ond remove cam. Remove locator nut from bobbin driver by turning in @ clockwise direction. Remove bobbin winder lifting brocket from winder actuating shaft. Slide button and shaft out through top of machine. Replacement is the same of remaval but in reverse order Bobbin Driver Removal and Replocement Open slide plate. Remove throat plate, bobbin cose, ond bed cover. Set stitch length selector at $ stitches per inch, ond turn hand wheel until feed dog is in extreme rear position. Remove locator nut, bob- bin winder actuoting lever sembly, locator, spring, ‘and bracket. Then slide bobbin driver up, rotate until ‘apron is opposite feed dog, and lift out of machine. To replace, install bobbin driver in machine, rotat- ing it until it seats firmly in place. Remeinder of re- placement is same as removal but in reverse order. Adjustment To odjust height of bobbin driver, place actuoting lever in wind position and hold down with finger. Loosen set screw on cam follower keeping nylon finger in line with costing. Press upward on cam, until bush+ ing foce is flush with end as actuating mechanism shaft, Tighten set screw on cam collar. Check Wind bobbin turning hand whee! slowly and ob- serve threed possage over and into bobbin during first rototion of hook. The top thread should freely slide ‘across the bobbin, passing through the position finger and cushion spring oreo (thread space) and cost off the hook leaving the top loop waiting for the driver At the same time, bottom thread should be seen flowing in bobbin pinch (hub) area and forming bottom half of loop ot the cast-off area for the cutting slot of the driver to pick-up, carry around ond cut. As this action takes place, the thread lead from the naedla is hahind the shelf orea of the bobbin cose ‘As the driver picks up loop ond storts to corry it ‘around, the thread lead moves into opening ond up on the shelf, before cutting action takes place. IF DRIVER IS SET TOO HIGH, lower thread is stricted forming @ loop on driver. IF DRIVER IS SET TOO LOW, driver will not pick up thread. Chatter winds and bobbin “pops” re- sult when driver is not fully engaged in bobbin. NOTE: Do not back off on bobbin case tension. Lotch tension on bobbin case must be sufficient to hold bob- bin in place during wind cycle. mblyTo Time the Hook Set needle bor at correct height as instructed on page 8. Time the needle bar vibrating mechanism os instructed on page 7. Insert a Size 18 needle up into needle clamp. Remove throat plate, bed slide ond reel case. Remove bottom cover plate. (Feed dog is re- moved to show point of hook, but it need not be re~ moved to time the hook.) ‘Adjust machine for stroight stitching in center needle position Turn hand wheel over toword operator until lower timing mark is oligned with lower edge of needle bar bushing: on UPWARD STROKE of needle ‘At this position, point of hook should be at center of needle as shown. Loosen the two set screws in horizontal bevel gear. Maintain position of needle bar ond turn vertical bevel gear ot end hook shaft until point of hook is located at center of needle, as shown. Securely tighten two bevel geor set screws moking certain that gears are correctly meshed without binding. CAUTION: Hub of horizontal bevel gear should not contact fece of bushing. Replace throat plate, slide plate, and reel holder. HOOK POINT VERTICAL BEVEL SET SCREWS HORIZONTAL BEVEL GEAR GEAR GEAR HuB SHOULD NOT CONTACT FACE (OF BUSHINGROTATING HOOK (Cont'd) 004 INCH Hook, POINT MARK BEVEL, GEARS. NEEDLE DRIVE SHAFT NuT To Position Hook to or From Needle Set needle bar at correct height and time hook as previously instructed. Turn hand wheel over toward operator until point of hook is directly behind needle. Distance between needle and hook point should be opproximotely .004 inch as shown. SETTING: Remove actuating spring, lecater nut, locator ‘ond drive shaft nut. NOTE: Locator nut and drive shaft nut have reverse threading and ore removed by turning in © clockwise direction. Carefully mark ‘the two bevel gears shown to ascure proper mating of teeth when replacing. Then loosen the set screw in vertical hook shaft bevel gear and remove gear from shoft. Loosen the set screw holding the eccentric bushing ond turn the eccentric bushing, while moin- taining position of hook, to obtain the proper dis- tance between needle and point of hook. Then replace bevel gear using the guide marks previously made to assure correct mating of geors. Replace all other parts in reverse order instruct ed for removal. Set winding mechanism os instructed on page 18. CAUTION: Check for binding or end play in hook driving shoft as instructed on page 24. VERTICAL GEAR SET SCREW Locator 12 LOCATOR ACTUATING NUT. SPRINGFEED DOG joval ond Replacement Open slide plate and remove throat plate. Remove the two set screws from the rear of the feed dog and remove the feed dog. Install feed dog in machine and securely tighten the two set screws. SS FULL DEPTH OF FEED DOG TEETH To Set Feed Dog Height Set stitch regulotor ot 12 to 15 stitches per inch and lock throat plate in position for general sewing. Turn hand wheel over toward operator until feed dog is at highest point. With feed dog ot highest point, approximately the full depth of feed dog teeth should project above top surface of throat plate es shown, SETTING: Lowses hinge ut on FEED LIFTING ROCK SHAFT ond turn eccentric hinge screw (see inset) until high point of eccentric is toward rear of mo- chine, making distance between hinge screw ond feed lifting rock shaft as short as possible, Then tuin eccentric hinge screw as required to bring feed dog to correct height. Maintain this setting while tightening hinge nut. 13 FEED LIFTING ROCK SHAFT HINGE NUT. ECCENTRIC HINGE SCREW eq]TO POSITION FEED DOG IN THROAT PLATE SLOTS FEED LIFTING FEED ROCK SCREWCENTER SET SCREW ROCK SHAFT SHAFT SET SCREW SCREW CENTER ° 2 eb @o ee LY el [we 8 SCREW CENTER FEED BAR HINGE RUT set SCREW ECCENTRIC HINGE SCREW CENTERS SCREW SET SCREW SCREW CENTER Lengthwise Setting: Set feed dog height os previously instructed. Feed dog, on its return stroke, should move os close as possible to front of throat plate slots with- out striking throat plete, Loosen hinge aut on FEED ROCK SHAFT ond turn eccentric hinge serew (see inset) until high point of eccentric is toward rear of machine moking distance between hinge screw and feed rock shaft os short as possible. Then turn eccentric hinge serew as required to position feed dog as close as potsible to front of throat plate elote without etrik Ing slots. Maintain this setting while tightening hinge nut. Sidewise Setting: Set feed dog height as instructed on previous pose. Feed dog should be located centrally (along the bed) in feed slots of throat plate. Loosen the four set screws that hold the screw centers for feed rock shaft and feed lifting rock shaft in place, 7) Then loosen the twa screw centers on feed lifting rock shaft slightly to permit movement of feed dog toward left or right To move feed dog toward left, loosen screw center on left of feed rock shaft and tighten screw center on right an equal emount as required, To move feed dog toward right, loosen screw center on right of feed rock shaft ond tighten screw center on left an equal amount as required. Securely tighten two set screws on feed rock shaft. Tighten screw centers on feed lifting rock shaft ‘equally and securely tighten set screws holding these screw centers. NOTE: Check for binding or end play in feed ber. To adjust loosen two nuts on feed bor ond turn screw centers os required. Securely tighten two nuts. If machine will not feed a straight seam, toke up slightly on one screw center ond tighten nut. Then, test by actual sewing. Repect this procedure untill machine feeds o streight seam without operator guidance,THREAD CLEARANCE ay 01s .040 inch (4) .012 018 inch (@ 012 018 inch (2) 012 018 inch Remove throat plate and slide plate. The following thread clesrances should be obtained IN THE ORDER GIVEN to,ptture proper handing of thtead and to allow for quick and easy removal of 1. Cleorence between under edge of cushion spring 3, Clearance between heel of reel case and cushion or cushion spring bracket and reel cose should spring should be .012 to .018 inch when position be .015 to .040 inch. finger is in contact with reel cose. 2, Clearance between cushion spring and cushion 4, Clearance between reel case and pi spring bracket should be .012 to .018 inch, should be .012 to .018 inch when case is in contact with cushion spring. 15CUSHION SPRING. SET SCREW. BEND BRACKET POSITION FINGER SET SCREW. THREAD SLOT HEELOF ECCENTRIC ECCENTRIC REEL CASE STUD sTuD SET SCREW 6 Adjustments Clearance No. 1: Lift up on position finger bracket ond slide ‘entire assembly from machine as shown. CARE- FULLY bend cushion spring or cushion spring bracket (see inset) os required to obtain .015 to 040 inch clearance between under edge of cushion spring or cushion spring bracket ond reel cose. Replace position finger bracket ossembly and check clearance, Clearance No 2: Loosen cushion spring set screw and position cushion spring to obtain .012 to .018 inch clearance between cushion spring and cushion spring bracket. Securely tighten cushion spring set screw. Clecrance No. 3: Turn hand wheel over toward operator until needle bar reaches lowest point. Using o Size 18 needle, align the left hand edge of the thread slot in reel case with the right hand edge of the needle fs shown, Loosen eccentric stud set screw ct side ‘of machine bed ond turn eccentric stud shown until cushion spring contacts heel of reel case WITH- OUT MOVING SPRING OR REEL CASE. Then tighten eccentric stud set screw. Cleorance No. 4: With heel of reel case contacting cushion spring, loosen position finger set screw and move position finger to obtain .012 to .018 inch clearance be- tween position finger ond tel case. Securely tighten position finger set screw. NOTE: Check position finger to make certain thet underside of finger does not contact reel cose. If necessary, CAREFULLY bend finger up so that there is a slight clearance between finger andPULL-OFF FINGER AND LINT WIPER Pull-off Finger Instructions for removal end replacement of pull-off finger ore included with instructions for removing and replacing the roteting hook. (See page 10.) Adjustments: The purpose of the pulloff finger is to draw sufficient threed from the reel in order 10 a feting the stitch Insert @ size No. 18 needle in needle bor ond set stitch length regulator at 6 stitches per inch, Tum hand wheel over toward operator until eye of aeedle 9 even with fop surface of pull-off finger AS"NEEDLE BEGINS "TO "RISE FROM LOWEST Point. When needle eye is aligned with pull-of finger as described above, pull-of finger should be at clote at possible fo needle without touching, os hewn Remove al ploy fom pull finger by waving the inside edge of the” polloff finger toward the needle : . LLocsen the hinge nut shown and move the pull oft finger at close as possible to the needle with- Sut touthing. Securely tighten hinge nut and check te see thar pultelt finger is correctly positioned MITA ALL PLAY REMOVED. Lint Wiper To remove the lint wiper, first remove the throat plate, reel, and reel holder Remove the ‘screw holding the lint wiper end lift the wiper out of the machine. Replace in re- verse order. Adjustment: Lint wiper must net be deflected by hock point ‘and should not interfere with removal of reel case frommachine. Loosen the screw shown and position lint wiper es required to avoid contact with hook and so as not to interfere with removal of reel case. Securely tighten screw. NEEDLE EYE EVEN WITH PULL-OFF FINGER LINT WIPER 7WINDING MECHANISM ‘Thread Actuating Lever: Removal and Re Remove bed cover from machine. Remove hinge screw and nut holding actuating lever to casting, Remeve locator nut from reel driver by turning ino CLOCKWISE direction. Disconnect coil spring and remove thread actuating lever with extension and actuating spring. lever with ectuating spri ing push button through hole Install thread actuati in machine bed fi provided in costing. Replace locator nut on reel driver. Insert hinge serew through hole in actuating lever ‘and casting ond replace nut. Connect coil spring to bracket in casting. Set winding mechanism os instructed on page 19. oD Reel Driver: Remove throat plete, slide plate, reel case and bed cover. Remove two screws in actusting spring end remove locator nut which allows for removal of actuating spring. locator and drive shaft nut I driver up and out of machir Instell reel driver in mach Replace driver shaft nut ond locator, ‘on locator into hole provided in bevel gear Replace actuating spring with two screws. Replace locator nut. Set winding mechanism os instructed on po csadjustments Reel Driver: Remove reel case and depress reel wind push button. With reel wind button depressed, distance from top of Hock race to top surface of reel driver should be opproximetely 1/16 inches shown. it loosening when machine is in operation. Remove bed cover and loosen the locator nut by turning in @ clockwise direction Turn drive shaft nut as required to position reel driver opproximately 1/16 inch below top of hook race, Maintein this setting while tightening locator rut securely. Release push button and replace reel Actuating Lever: ‘The actuating lever should be adjusted so that approximately four to six pounds of pressure is exerted on the reel driver when the push button is lepressed. To obtain correct pressure, loosen two actucting lever screws and two lever extension screws. ‘Then insert c .025 inch feeler gauge between sctuating spring ond lever extension at point shown. With push button depressed, and without exerting pressure on spring, hold actuating spring ogeinst locator so that the reel driver mechanism is ace tivated as shown in illustration to right. Securely tighten two actuating lever screws ond tone of lever extension screws (farthest from feeler gauge). Then tighten the other lever extension SCREWS LEVER EXTENSION INSERT FEELER GAUGE HERE CLEARANCE 4.TO 6 POUNDS PRESSURE ON ACTUATING SPRING ACTUATING LEVER 19 Actuating Le With reel wind push button in raised (sew) position, loosen lock nut on actuating lever stop and turn stud to obtain @ slight clearance between actuating spring and locator nut as shown, Replace bed cover. WML stus——_ LEVER EXTENSION SCREWSNEEDLE THREAD TENSION ASSEMBLY CHECK SPRING STUD \ — Hh ae a ae Loosen stud set screw and remove entire tension assembly. (See illustration on next page.) Loosen set screw in regulator dial and remove dicl. Turn adopter to left and remove it and nylon sect from stud. Remove spring, cup, and tension releasing pin. Remove reteining ring ond slide indicotor stop from stud. Remove as o unit, check spring, thread guard and tension dises. Replacement: Make certain that releasing pin is in place as shown. Place tension discs on thread guord. Align coils of spring with hole in discs and place this assembly on stud as shown. Extension of threed guard enters hole provided in machine head, NOTE: Tail of check spring enters one of the grooves in reor of stud. (See instructions for se ting check spring, page 22.) Slide indicator stop on stud end replace retaining ring. THREAD GUARD, cl 20 INDICATOR creel SET SCREW NYLON iP SEAT 6) ADAPTOR RETAINING RING SPRING DIAL, Replace cup and spring os shown. Place nylon seot inside adopter ond screw adoptor on stud. Replace regulator dial moking certain that stop on inside surface of dial contacts indicator stop from left side when dial is set for zero tension. Tighten set screw. Place entire tension assembly into seat provided for it in machine head. Adjust tension os instructed on next page. TAIL OF wens aR syuo o\ c= | \9 RELEASING ein CHEK'SPRINGTension Indicator Stop Before replocina regulator assembly, check position of indicator stop. Tension indicator stop should be positioned at bottom of thread guard of 6 O'CLOCK ond should be in line with thread guord extension as shown. When correct adjustments hove been obtained replace tension assembly making certain alignment is maintained, Drow check spring up so thet it rests on regu: lator stop os shown. Insert regulator into machine cond securely tighten stud set screw. To Adjust the Needle Thread Tension: With reel wind push button in the raised (sew) position, turn tension regulator dial to zero (0) tension ond thread machine using A- Silk thread, Hold thread on both sides of tension regulator fond pull threed back ond forth through tension discs. The tension on needle thread should be just slightly perceptibl To adjust, loosen set screw in regulator dial fond remove dial, Turn adjusting nut locsted on stud es required to obtain © slightly perceptible tension. Replace regulator diel _moking certain thet Stop on inside surface of diol contacts indicator stop from left side when dial is set for zero (0) tension. Securely tighten regulator dial set screw. THREAD GUARD. WorcLock INDICATOR STOP. ADJUSTING. set REGULATOR DIAL 2NEEDLE THREAD TENSION (Cont'd) coaen! SET SCREW SPRING CHECK, SPRING STOP SHORTER STROKE SPRING IN TOP GROOVES ADJUSTING SCREW SSS 22 CHECK SPRING STROKE The check spring should complete its action cond be ot rest against check spring stop os point ‘of needle enters meterial. Illustration ot right shows regulator slot 1/16 to 3/32 inch to right of serew head. When it becomes necessary to adjust the check spring stroke, loosen set screw shown ond move the entire regulator up to the left to complete check spring action earlier (shorter stroke) or move regulator down to the right to complete check spring action later (longer stroke). Securely tighten regulator set screw. CHECK SPRING TENSION Tension on check spring should be just suf- ficient to take up slack of needle thread, until point of needle reaches material. End of check spring should be positioned in top groove of sprocket (at 12 O'CLOCK) and should be in line with thread guard extension to obtain normal tension under everage sewing conditions. To adjust the check spring tension, turn reg vlator dial to zero and loosen stud set screw shown on page 21. Remove entire regulator from machine. Move end of check spring toward right (CLOCK- WISE) to increase tension or toward left (COUN- TERCLOCKWISE) to decrease tension as shown. If slight variations occur in the setting of the stitch, inerease check spring tension by moving the end of the check spring (clockwise) one slot. Retest by sewing. If excessive puckering occurs restore check spring tension to its original setting. REEL CASE LATCH TENSION CAUTION: Tension on reel case latch hos been set at the factory ond should not be adjusted un- less absolutely necessary. Tension moy be edjusted by turning the ad- justing screw on the reel case as required.UPRIGHT AND HORIZONTAL ARM SHAFTS HORIZONTAL ARM LOADING PRESS DOWN ON UPRIGHT. tt Nh UPRIGHT ARM SHAFT. Removal and Replacement CAUTION: DO NOT REMOVE the upright arm shaft from this machine. If this becomes necessary, the machine should be returned to the factory. Both sets of bevel geors ot the ends of the up- right orm shaft have been lapped together at the factory and should be kept in mesh throughout all other removals and replacements, Adjustment for Binding or End Play To eliminote end play or binding of upright arm shaft, loosen set screw in lower bevel geor. See illustretion on following page. While pressing down on upright arm shaft from top of machine, set gear firmly ogainst bearing on casting ond tighten set screw in lower bevel gear. Adjust hook driving shaft for end play or binding. HORIZONTAL ARM SHAFT Removal and Replocement Remove arm cover and face plate. Remove hand wheel and needle thread toke-vp. Remove the com stack as instructed on poge 34.t Remove dise follower assembly os instructed on page 41.11 Loosen set serews in collar and loeding com. Remove two screws and remove connecting od cop. Loosen feed timing screw so thot bevel gear is free fon arm shaft. 23 FEED TIMING CONNECTING CAUTION: Keep gears in mesh at all times. Remove pressure regulator as previously instructed. Using e 1/2 inch drift pin, drive arm shaft out ot face plote end of mac Hold geor in mesh with gear on upright arm shoft. Insert’ orm shaft info machine orm through collar, bevel gear and feed forked connection Make certain flat on orm shaft is under set screw in collar, Then tighten set screw. Tighten feed timing screw into groove, provided in em shoft. Replace com stock os instructed on page 34.1 Replece dise follower assembly os instructed on poge 41.tt Adjustment for Bi ing or End Ploy Should horizontal orm shaft require odjustment for end play or binding, loosen set screw in front arm shoft collar and turn hand whee! until timing set screw appears in hole in cap of connecting tod ‘8 shown. Loosen timing set screw. Push needle bor crank toward hand wheel end of machine ond press horizontal bevel geor firmly in mesh with vertical bevel gear at top of upright orm shaft, Avoid bocklosh or binding. CAUTION: Bevel gears MUST be kept in mesh ot all times. Tighten timing set serew ond check for fr running. Press arm shaft collar firmly against bus ing in head of machine and tighten collar set screw. Check timing of hook as previously instructed.HOOK DRIVING SHAFT Removal and Replacement Remove bed cover. Remove rotating hook os instructed on page 10. Remove motor as instructed on page 30, Mark the two sets of bevel gears chown to assure correct mating of gears when replacing. Loosen two set screws in horizontal bevel gear (rear) and loosen one set screw in horizontal bevel geet (front). Loosen set screw in collor. Slide hook shoft out toward hand wheel end of max chine. Insert hook shaft through bushing ot hand wheel end ‘of machine and place collar on hook shaft. NOTE: Flot on hook shoft must face toward head tnd of machine, Insert hook shaft through bushing ot head end of machine and place the two horizontal bevel gears fon shaft using the guide marks previously made to assure correct mating with vertical bevel gears. MARK BEVEL GEARS, COLLAR SET SCREW > ‘Turn hook shaft to align Flot on shaft with horizontal bevel geor (front) and tighten set screw. Tighten two set screws in horizontal bevel gear (rear). Position collar against bushing (front) ond tighten collar set screw. Adjust for end play or binding. Replace motor and rotating hook as instructed on pages 10 and 30. Time and set hook as instructed on pages 11 and 12, Adjustment for End Play or Binding To eliminate end play or binding in hook driving shoft, loosen collar set screw and bushing set screw shown. Position shaft as required to eliminate binding or end play and move bushing against bevel gear. Tighten bushing set screw. Position coller against bushing ond tighten collor set serew. MARK BEVEL, HORIZONTAL GEAR GEARS SET SCREWS (REAR) BUSHING SET SCREW (FRONT) HORIZONTAL GEAR SET SCREW (FRONT) 24 ae = Co AS HOOK DRIVING SHAFT Jea FEED LIFTING AND FEED ROCK SHAFTS Removals ond Replacements Feed Lifting Rock Shaft Remove bed cover. Remove motor hold-down plate ond motor as instruct. ‘ed on page 30. Remove nut A and eccentric B, disengaging feed lifting rock shaft from upright connecting rod. Loosen set screw and remove screw center D. Remove screw stud E, disengaging feed ber. Remove feed lifting rack shaft ond pull-off finger Install feed lifting rock shaft in reverse order of its removal Adjust feed dog as instructed on pages 13 and 14. Replace moter as instructed on page 30. Feed Rock Shoft Remove bottom cover plete. Remove motor hold-down piote ond motor. Remove feed lifting rock shoft as instrocted above: Remove nut Fe Remove eccentric G, disengaging feed rock shoft from feed fork connection. Loosen set screw H and remove screw center J. Remove feed rock sholt with feed bor ond feed dog. FEED LIFTING STUD E ROCK SHAFT Install feed rock shaft with feed bar ond feed dog in reverse order of removal. Install feed lifting rock shaft as instructed above. Adjust feed dog as instructed on pages 13 ond 14. Replace moter. Adjustments for End Play or Binding Feed Lifting Rock Shaft To eliminate end play or binding of feed lifting rock shaft, loosen set screw C at right end of shaft and adjust serow center D as requires Securely tighten set screw C. Cheek and adjust feed bar for end play or binding and re-adjust for sidewise position of feed dos, (See poge 14). Feed Rock Shaft To eliminate end play or binding of feed rock shaft, loosen set screw H at right end of shaft and adjust screw center J so that shoft rides snugly but freely, (without any left of right movement). Securely tighten set screw H. FEED ROCK FEED BAR praia SET SCREW C SET SCREW HNEEDLE BAR VIBRATING BRACKET AND NEEDLE THREAD TAKE-UP ECCENTRIC HINGE PIN MARK EDGE CLAMPING HINGE PIN SPRING NEEDLE BAR ‘CRANK 26 Needle Ber Vibrating Bracket Removal and Replacement Remava arm top cover and face plate, Remove pressure regulating dial os instructed on poge 6. (lt is not necessary to remove the presser ber.) Mork edge of eccentric hinge pin, as shown, so that in relation to ‘casting mey be readily Unhook driving orm spring from hinge pin. Loosen set screw and remove hinge pin, Loosen set serew in collar ond remove collar. Loosen clamping serew and remove large eccentric hinge pin. Remove needle ber vibrating bracket from machine hecd, Install needle bor vibrating bracket in the reverse order of its removal. Observe the following: Driving orm spring must be hooked around hinge pin as shown and hooked on releasing lever os shown on pege 32, Moke certain that when set screw in collar is tightened, vibrating bracket moves without loose- ness or binding, Turn eccentric hinge pin until marks previously mode are in line with eoch other. Then securely tighten clomping screw in eccentric hinge pin. Needle Thread Toke-up Removal and Replacement Remove needle bar os instructed on poge 7. Remove vibrating bracket as instructed above. Loosen set screw on hinge stud. Through hole in top of casting, loosen set screw in needle bor crank. Withdraw needle thread take-up with | stud and toke-up stud from machine. hinge Replace needle thread take-up in reverse order ine structed for removal. Position mark on take-up stud parallel to heod of set serew in needle bar eronk. Press firmly on toke-up stud ond tighten set screw in needle bor eronk. Turn hond whee! while setting hinge stud to moke sure there is no end play or binding. Tighten set screw on hinge stud. Replace needle bar os instructed on page 7.HAND WHEEL AND STITCH LENGTH REGULATOR Hond Wheel Removal and Replacement Remove orm cover. Remove stud screw and retaining spring. Slide hand wheel and gear spring from shaft. Slide hand wheel gear from shoft. Position hand whee! geor on gear bearing, and at the some time mesh hand wheel geor with motor drive gear (worm). Insert one end of gear spring into hole provided for it in hand wheel gecr. Ploce hond wheel on shaft inserting other end of gear spring into hole provided in hand wheel. Reploce stud screw and retaining spring. Replace arm cover. Stitch Length Regulotor Removal and Replacement Remove hand wheel as instructed above. Remove control panel. Remove two screws in bracket. Move regulator to highest position. Remove large hinge screw with its spring and washer. Pull entire regulator out of machine arm. Install regulator in arm, fitting regulotor on slide block. Replace large hinge screw with its spring ond Position bracket and fosten with two screws. Replace hand wheel and contra! panel 27 HAND WHEEL GEAR GEAR SPRING STITCH LENGTH REGULATOR SLIDE BLOCK we STUD SCREW _E RETAINING SPRINGTHROAT PLATE POSITION BRACKET Removals ond Replacements Remove throat plate Ser throat plete position lever to right (sewing) position. Remove winding mechonism (See page 18). While pressing left end of bracket toward underside of machine bed, remove adjusting screw. Swing left end of bracket away from machine bed and remove two throat plate clomps with bracket, pins ond springs. Remove two screws from indicator plate, Lift indicator plete, stop plete, ond stop plate spring from machine bed. Set position lever in center (doming) position, Remove position bracket. SPRINGS scree oe ee ee ny | | apsustine scxex ADJUSTING IL THROAT PLATE CLAMPS: 28 POSITION BRACKET CLS Replace throat plate position bracket in the reverse order of ite removal Observe the following:— Stop plete spring should be replaced with the curved portions of spring under cross-piece of lever. (Re- mainder of spring should extend toward left.) Position bracket must be inserted in grooves under machine bed as shown. Adjusting screw should be turned in flush with bottom of costing while pressing left end of bracket toward underside of machin Replace winding mechanism. INDICATOR PLATE SCREWS. aeoay i _ INDICATOR PLATE Ge PLATE q Seo —__ stor mate SPRING POSITION LEVER ACTUATING BRACKET 4CONNECTING ROD AND FEED CONNECTION Connecting Rod Removals and Replacements: Remove arm cover Remove twe cap screws ond remove connecting rod ‘cap. Remove bed cover ond motor as instructedon page 30. Remove nut and eccentric stud to disengage con- necting rod from feed lifting rock shaft. Remove connecting rod from bottom of machine. Insert connecting rod into upright orm through bottom of machine, so that it fits cround bottom half of gear hub on eccentric. Replace cop over top half of gear hub and fasten op to rod with two screws. Replace stud ond nut to engage connecting rod to feed lifting rock shaft. Adjust feed dog height os instructed on page 13. Replace motor and bottom cover plate as instructed fon page 30. Replace arm cover. Feed Connection Removals end Replocements Remove stitch length regulator. Remove motor Remove nut ond stud to disengage feed forked con- nection from feed rock shaft, Insert feed forked connection into upright orm, through bottom of machine, so that it fits oround eccentric, a shown. Engage feed forked connection with feed rock shaft, tnd fasten with stud ond nut. Replace stitch length regulator. Adjust position of feed dog as instructed on page 14. Replace motor, bed cover and arm cover. ECCENTRIC CONNECTING ROD CAP FEED LIFTING NUT ECCENTRIC CONNECTING FEED ROCK SHAFT. nur STUD FEED FORK CONNECTION 29THE MOTOR Removal and Replacement (see wiring diogram on page 46.) CAUTION: Remove plug from electric outlet before removing ny electrical port from machine, Tilt machine back. Remove bed cover from machine. Remove motor hold-down plate by removing screw cal sleeve connections from motor Slide motor out toward you. 30 NOTE: Remove grit or hardened grease from worm gear on motor shaft before replacing moter. Moke sure that light lead is correctly positioned to avoid binding when motor is replaced. Slide motor into position, turning hand wheel slightly. to focilitate correct gear mesh. Fit electrical sleeve connections to terminals. Replace motor hold-down plate ond bottom cover plate,THE FOLLOWING PAGES (pages 32 to 39) APPLY ONLY TO MACHINE 600‘THE RELEASE MECHANISM. Lever STOP SCREW EXTENSION BRACKET SCREW PLastic Removal and Replacement Remove bracket screw and stop screw from front selector arm stop. Release needle bor driving orm spring and follower spring from releasing lever. Remove releasing mechanism assembly from machine. Replace assembly in reverse order ond observe the following: Place release bracket over casting and locate it in position with bracket screw. Do not tighten screw. Slip front selector arm stop over screw and assemble to machine by replacing stop screw. Do not tighten Re-position driving arm spring into hole of releasing lever and connect follower spring. Adjust the machine as instructed on next page 32 FOLLOWER SPRING Lever EXTENSION NOTE: If lever extension does not make « with plostic sleeve, loosen screw and lows tension os required. Securely tighten screw. Check operation of selector mechanism at this point being sure that needle bar is raised to its highest point with toke-up lever at approximate mid point of its stroke. If both stitch pottern selectors move simultene- ously when only one is depressed, binding exists at point of contact between adjustoble bracket ond plostic sleeve. Adjust *o eliminate binding and set the release mechanism as instructed on next page.Adjustments Setting the Release Mechanism Remove arm top cover. Be sure stitch pottern selectors ore properly engaged. Otherwise machine will clatter when in operation. If clatter persists ofter selectors are engaged, releasing mechanism requires odjustment 25 follow: Loosen set screw in adjustable bracket and en- goge release mechanism by swinging releasing lever fo the right until it engages. Tighten screw ond then boek off approximately 1/8 turn. Swing entire release mechanism to the right (bracket and stop screws having not yet been tight- ened) so that lever extension makes contact with plastic sleeve. Then tighten bracket and stop screws securely. Move edjustable bracket on front selector lever until it makes contact with plastic sleeve, Re-tighten set screw securely. Setting the Leading Com If lever extension jiggles erratically when hond wheel is turned, adjustment must be made to locding Engage release mechanism by swinging releasing lever to the right. Loosen screw in loading cam ond move com toward left and away from casting. Rotate hand wheel so that cam relocates itself in proper position. Maintain this position while tightening screw in loading cam. 33 LEVER EXTENSION RELEASING LEVER BRACKET SCREW ADJUSTABLE BRACKET RELEASE MECHANISM ENGAGED STOP SCREW STITCH PATTERN, SELECTORS LOADING CAM SET SCREW‘THE CAM STACK SPRING sTuD Removel ond Replacement Set stitch pattern selectors ot “A K'". Remove arm top cover and Special Dise. Remove large screw stud with its spring. Remove cam stock. Replace cam stack, meshing worm wheel of cam stack with worm of orm shaft. Replace screw stud with its spring. Replace Special Dise and arm top cover. Adjustments Timing the Cam Stack: Remove orm top cover and Special Dise. Using stitch pattern selector, bring rear follower in contact with edge of top cam of cam stack. CLAMPING SCREWS Turn hand wheel over toward you until timing mark is at point of contact with reor follower os shown. At this setting, the needle ber should be at its lowest position, Loosen each of the three clamping screws on top of com stack. While holding needle bar at its lowest position, manually rotate entire cam stack clockwise until timing mark reaches point of contact with rear follower, as shown. SG IN Tighten the three clamping screws. Replace stud and spring. Tighten stud. Replace Special Dise and orm top cover,Cam Selector Arm Shaft and Followers Removel ond Replacement Remove arm top cover and contral pane! Remove cam stack as previously instructed. Loosen the clamping screw in lower selector orm by inserting screwdriver through hole in upper Remove the screw in reur follower arm Loosen the rear stop bushing set screw. Withdraw selector orm shaft from rear of machine arm, releasing rear selector arm ond front selector Remove selector arms from machine Removetwo followers from index pins. Replace two followers end replace selector arms making certain that hinged brackets fit into slots in followers. Replace selector arm shaft through follower arms. Reploce rear follower arm screw making certain thet it clamps down on counterbore on shoft. Securely tighten rear stop bushing set scr Tighten the clamping screw in lower selector orm. Replace com stack. Check ond odjust the release mechanism as in- structed on page 32. Adjustments Setting the Index Pins. Set stitch selectors at J" ond * Remove arm top cover ond control panel. At this setting, top surface of two arm followers should be approximately 1/64 inch below top surface of com stock. NOTE: Position of two atm followers is determined by height of index pins. Loosentear index pin set screw. Raise or lower rear index pin as required, to bring top surface of rear follower 1/64 inch below top surface of cam stack. Then securely tighten set screw, Loosen front index pin set screw at front of max chine arm. Raise or lower front index pin os required, then securely tighten set screw. REAR HINGED FOLLOWER BRACKET REAR REAR FOLLOWER INDEX [ARM SCREW PIN CAM SELECTOR ARM SHAFT REAR INDEX PIN SET SCREW FRONT INDEX PIN SET SCREW 35Setting Com Selector Arm Stops Remove arm top cover. Check adjustment of worm wheel shoft (see in- tions on page 37). Set selectors at “D" and “L". Turn hand wheel over toward you until arm brack= et followers rest upon high points of bottom (zigzag) tam of cam stack ‘At this setting, when stitch pottern selectors ore depressed as far as possible, clearance between both followers and high point of bottom com should be .010 and .012 inch. ARM FOLLOWERS. CAM Front Selector Arm Stop STOP BUSHING a0 SET SCREY SET SCREW Disengage release mechanism by pushing in on to 012 INCH upper selector button. Loosen screw in front selector arm stop and de- press top selector button until there is epproximately 010 inch clearance between front follower and com. Maintain this clearance while moving stop toward front of mochine until it mokes contact with front ly. selector arm. Then tighten screw sec: Rear Selector Arm Stop Loosen stop bushing set screw at rear of com selector arm shaft. Press lower selector button until there is approximately .010 inch clearance between rear follower and cam. Mointain this setting while moving stop bushing toward front of machine until it makes contact with rear follower arm. Then tighten set screw securely, ARM STOP Hex Head — .010 SCREW Screw te Aligning Indicator with Selector Letters 012 INCH Indicators "A" to "3" Loosen set screw through hole in upper selector FRONT ae ign indicator mark wit position on front FOLLOWER eles ie panel making sure that recr follower is in contact with aluminum bight control ring (lowest ring with largest diameter under the com stack). Securely tighten set screw. Indicators "'K"" to "*Speciel", Loosen hex heed screw in front follower orm. Align indicator mark with ""K" position on front pone! moking sure that front follower is in contact with aluminum bight control ring (third ring from bottom under the cam stack). Then tighten hex head REAR FOLLOWER 36BIGHT AMPLITUDE AND PATTERN SELECTOR Removal and Replacement Remove arm top cover, face plate and conttol panel: Ser stitch pattern selectors at "A" = ““K"", Remove driving arm spring. Remove bight lever screw from bracket and remove bight lever. Loosen bight amplitude set screw and remove en- tite com stack assembly, Remove bight omplitude and pattern selector. Reploce pattern selector in the reverse order of its removal, Observe the following: Assemble com stack © complete unit. Upper eccentric half of worm wheel shaft should be turned toward hand-wheel-end of machine, as shown DRIVING ARM SPRING BIGHT AMPLITUDE SET SCREW Make certain thot driving arm ball pivot is engoged with pattern selector. Set mesh between worm of arm shoft end worm wheel of pattern selector by turning bight amplitude shaft clockwise so that there is no binding ond minimum ‘amount of backlash, Tighten bight amplitude set screw. Replace driving orm spring. Replace bight lever ond fasten with set serew. Adjust machine as:iristiucted below and on fol lowing page. BIGHT LEVER SCREW BIGHT AMPLITUDE SHAFT. ECCENTRIC HALF OF SHAFT 37LEVER VIBRATING BRACKET, 38 Adjustments Setting the Bight Amplitude Stop Plotes Set index pins ot correct height ond time the cam stack. CHECK: (At No. | Position) With stitch controls set at “A-L-3", operate machine ot slow speed and, at some time, move stitch width (bight) lever to No. 1 position. Move- ment of driving orm ond vibrating bracket should stop at same time that movement of bight lever stops at No. 1 position, Loosen clamping screw in left stop plete. Move bight lever to No. 3 position. Run machine ot moderate speed and move bight lever toward left to point where there is no movement of vibreting bracket or driving orm. DO NOT PASS THIS POINT. Maintain this position of bight lever and move left stop plote forward (toward operator) against bight omplitude bracket beneath cam stack. Hold stop plate at this setting ond securely tighten clomping screw. CHECK: (At No. 5 Position) With stitch controls set ot “D~K -3", operate machine et slow speed ond, ct some time, move stitch width (bight) lever to No. 5 position. Move- ment of driving orm and vibrating bracket should stop at some time that movement of bight lever stops at No. 5 position. Loosen clamping serew in right stop plate. Move bight lever to No. 3 position. Run machine ot moderate speed and move bight lever toward right to point where there is no move- ment of vibrating bracket or driving arm, DO NOT PASS THIS POINT, Maintain this position of bight lever ond move right stop plote forward (toward operator) ogoinst bight amplitude bracket beneath com stack Hold stop plate at this setting ond securely tighten clomping screw.NEEDLE BAR DRIVING ARM Removal and Replacement Remove arm top cover and face plate. Remove com selector arm shaft os instructed on page 35. Remove needle bar vibrating bracket os instructed ‘on page 26. Lift needle bor driving orm from machine. Replace needle lr driving arm in arm of machine 0 thot boll pivot rides in socket provided for it in pattern selector, as shown. CAUTION: Make certain that tension arm is in cor rect position in relation to driving arm as shown. Replace com selector am shoft os instructed on page 35, Replace needle bar vibrating bracket os instructed on page 38, Adjustments Centralizing Needle Bar Driving Arm Set bight amplitude stop plates os instructed on page 36. Ser bight lever at No. 3 position. When bight lever is set at No, 3 position, the center line of needle bar driving arm should coincide with @ point midway between selector arm followers. Loosen bight lever clamping screw. Push lever bracket toward left as far os possible, Align center line groove of bight lever with No. 1 position as shawn. Tighten bight lever clamping screw. Move bight lever os far as possible to the right. Center line groove should now be in line with No. 5 position, as shown, If center line groove of bight lever is not in line with No. 5 position, loosen bight lever screw end, while holding bracket to extreme right, move lever 1/2 the distance that it is off (out of line). Then tighten bight lever clamping screw. Lever will now be on equal distance from center position No. 3 when set ot No. 1 and Ne. 5 positions. Replace arm top cover and face plate. TENSION NEEDLE BAR BALL ARM. DRIVING ARM PivoT CENTER LINE GROOVE mei eee ae eg eisTHE FOLLOWING PAGES (pages 41 to 45) APPLY ONLY TO MACHINE 603 40DISC FOLLOWER ASSEMBLY Removol ond Replacement Remove arm top cover, FASHION DISC and control panel. Remove needle position selector button. Remove two sctews from bight amplitude plate and remove plate from machine arm. Loosen set screw in selector lever pivot and remove from machine. Disengage selector spring from hook on selector lever. Move bight lever to extreme right position. Press selector lever into machine ond disengage it from rear follower by pushing follower down. Loosen set screw at rear of machine (see inset) and remove rear index pin from machine. Raise disc follower assembly and remove selector spring from front index pin. Remove entire disc follower assembly together with selector lever assembly from machine. Assemble disc follower assembly as shown in ile lustrotion ond replace on front index pin. Do not lower entire assembly: Assemble selector lever on index pin NOTE: Disc follower assembly must be raised sufficiently to permit assembly of lever on index pin Assemble selector spring (wide loop) on front index pin. Locate rear follower in relative position over hole for rear index pin. Replace rear index pin with its “flat! portion towards its set screw (inset). Tighten set screw. Lower entire disc follower assembly until it rests on disc follower spacer on front index pin, and dis- engaging lever rests agcinst lower section of fol- lower Attach loop of selector spring to hook of selector lever Press selector lever into machine and, at same time, raise rear follower, as required until rear section of lever engages slot of recr follower. Replace bight amplitude indicator plote with two screws ond replace needle position selector button. Set selector lever at RIGHT needle position. Loosen set screw (inset) slightly. With selector lever pushed in, raise or lower reor index pin until rear portion of lever engages top slot provided for it on index pin. Then set index pin ot correct height as instructed on following page. Replace selector lever pivot so thet it fits in slot provided for it in selector lever assembly. Tighten Time disc follower assembly os instructed on page 42. Adjust disengaging mechanism os instructed on poge 45, BIGHT AMPLITUDE PLATE REAR INDEX FRONT INDEX PIN © sLector Lever DISEMGAGING LEVERREAR CAM FOLLOWER FRONT INDEX PIN SET SCREW. REAR INDEX DISC BIGHT LEVER ECCENTRIC SCREW / | 2 4 oe scREW DISENGAGING. FINGER BIGHT AMPLITUDE ‘SELECTOR 42 Adjustments Setting the Index Pins Rear Index Pin Remove orm top cover ond FASHION DISC. Set needle position selector in RIGHT needle position. ‘At this position, top surface of com follower should be even with (or slightly below) top surfoce of upper (small) ring of bight amplitude selector. Loosen set screw on rear of machine. Raise or lower rear index pin, as required, to bring top surface of follower even with (or slightly below) top surface of upper (small) ring of bight omplitude selector Tighten set screw. Front Index Pin Ser bight lever in “*S"" position ‘At this position, top surface of disengaging Finger should be even with top surface of upper (smell) ring of bight emplitude selector as shown, Loosen set screw which holds index pin to ma- chine orm. Roise or lower front index pin, as required to bring top surface of disengaging finger even with top surface of upper (small) ring of bight omplitude selector. Tighten set serew. Timing the Dise Follower Assembly Remove arm top cover and place Zigzog Dise No. 0 on disc spindle. Set needle position selector in LEFT needle position, Turn hend wheel until dise follower is oligned with timing mork on disc as shown. Slowly move bight lever from left to right posi- tion. While doing so, there should not be any move- ment of needle bor. Loosen clamping screw and eccentric screw in disc follower. While moving bight lever from left to right, turn eccentric clockwise until there is no movement of needle bar. Tighton clamping screw. Then, while maintein- ing correct position of eccentric, tighten eccentricDISC DRIVING WORM WHEEL ASSEMBLY Removal ond Replacement Remove arm top cover and FASHION DISC. Remove needle position selector lever assembly as instructed on page 41. Remove large screw stud from worm wheel shut Remove dise driving worm whee! assembly. Replace disc driving worm wheel assembly in re- verse order of its removal. Adjustments Timing the Dise Driving Worm Wheel Assembly Place Zigzag Dise No. 0 on disc spindle. Turn hand wheel until dise follower is aligned with timing mark on dise as shown, At this position, needle bar should be ot its lowest position Remove Zigzag Dise. Loosen the two clemping screws in dise driving plote, one complete turn. Replace Zigzag Disc No. 0 ond, while holding needle bar ot its lowest position, manually rotate dise clockwise until timing mork on Zigzag Dise is aligned with disc follower as shown. Remove disc and securely tighten clamping a3 CLAMPING SCREW SCREWS sTuo WORM WHEEL, ASSEMBLYBIGHT AMPLITUDE SELECTOR Removal ond Replacement Remove arm top cover, face plate and control panel. Remove dite driving worm wheel assembly as previ- ously instructed. Remove selector spring. Remove bight lever screw and remove bight lever. Loosen bight amplitude set screw and remove bight amplitude selector. NOTE: Although Machine 603 does not have a cam stack as has Machine 600, the removal, replacement cond timing of bight amplitude selector ond eccentric shaft (see page 37) are identical for both machines. Replace bight omplitude selector in the reverse order of its removal. Observe that high point of ‘eccentric shoft feces hand wheel end of machine ‘ond is adjusted in the same monner as instructed on poge 37. Adjustments Setting the Bight Amplitude Stop Plates Ploce Zigzag Dise No. 0 on disc spindle, Set index pins at correct height and time the dise driving worm wheel assembly as instructed fon page 43. RIGHT STOP. PLATE SELECTOR LEFT STOP CHECK: (Moking paper perforation test) Set throat plote lever in up (darning) position. Remove presser foot Place an ordinary sheet of note poper over throat plate, holding it tout. With bight lever set at ‘'S", make o slight per- foration in the poper ot each of the LEFT, CENTER, and RIGHT needle position settings. Then, with- ‘out disturbing position of note poper, set bight lever ‘at "5" (moximum width) position and turn hand wheel over toward you. Needle should enter some perforations made previously. Check to see that center groove of bight lever is in line with imaginory line which bisects clamping screw as shown. (To make alignment, leosen bight lever screw, move bight lever as required, then tighten screw. Loosen left and right stop plate screws. While bight lever is in ''S” position, move left stop plate forward (toward operator) against bracket beneath bight omplitude selector and securely tight- ten left stop plote screw. Move bight lever to "'S" position. While in this position, move right stop plate forward (toward op- erator) against bracket beneath bight amplitude selector and securely tighten right stop plate screw. BIGHT LEVER SCREW “4NEEDLE BAR DRIVING ARM Removal and Replacement Remove arm top cover ond face plate. Remove needia bar viheating hrackat as inetnctad con poge 26. Lift needle bor driving orm from mochine. Install needle bar driving orm in arm of machine so that ball pivot rides in socket provided for it in pattern selector as shown. CAUTION: Moke certain that tension orm is in cor rect position in relation to driving arm Replace needle bor vibrating bracket os instructe en page 2. . Adjustments Disengaging Mechanism Remove atm’ top cover and place Zigzag Dise No. 0 on disc spindle. Set bight lever in S" position. Turn hond wheel until dise follower is align with timing mark on disc, At this position, there should be .010 inch clear- fence between adjustable follower and driving arm plate, os shown. Remove control penel. Remove needle position ond bight indicator plate by removing the two screws which fasten it 10 mo- chine orm. Insert screwdriver through slot for bight lever cond loosen left bracket screw. With bight lever in "'S"* position, insert .010 inch Feeler Gauge between adjustable follower and driving arm plate. Move teil of disengaging bracket until bracket comes in contact with disengaging finger. ighten bracket screw. Replace indicator plate, contro! panel and arm top cover. 010 INCH DISENGAGING. FINGER. 45 TENSION ARM TIMING WARK BIGHT INDICATOR LEFT BRACKET SCREWCONNECTOR (SOLDERLESS) ON-OFF swiTcH J WITH LEADS, Light SockeT WITH LEAD CONNECTORS (SOLDERLESS) Two PIN MALE WALL PLUG 4-PIN TERMINAL, (FEMALE-HALF) \ PA10.8 MOTOR LIGHT Leaps WITH TERMINALS i (MALE-HALF) CONTROLLER 46SEWING DIFFICULTIES HINTS FOR ADJUSTERS AND MECHANICS CHECK THESE POINTS WHEN REEL OR REEL CASE IS DIFFICULT TO REMOVE |s reel wind push button in roised (Sew) position? Is lint wiper properly positioned? Is winding mechanism properly set? (See page 18.) Is correct procedure for removal being followed? (See instruction book.) WHEN THREAD SNAGGING, SKIPPED STITCHES. OR OTHER THREAD HANDLING DIFFICULTIES occur Are thread clearances correct? (See page 15.) Are tension and pressure settings correct? Is needle size correct for material in use? dle seated in needle bor? Is needle bar height correct? (See page 8.) Ishook properly timed? Ishook clogged or sticky? WHEN NEEDLE STRIKES PRESSER FOOT OR SEWING HOOK Is needle bor height correct? (See page 8.) Is needle bent? Isneedle seated in needle bar? Is presser bar height correct? (See page 6.) Is radial position of hook correct? (See page 12.) Is end ploy in hook shaft-excessive? (See page 24.) WHEN MACHINE IS NOISY Is end play in hook shaft excessive? (See page 24.) Is throat plate properly seated? Is needle shank or needle clamp striking presser foot? Is feed dog striking sides of slots in throct plate? (See page 14.) WHEN MACHINE BINDS Is bed or arm cracked or sprung? (Incurred during transit.) Isarm shoft bent or is collar set too tight against casting? Is needle bar or toke-up bent? Is needle bor vibrating bracket set too tight? Is there sufficient thread clearance in hook ore? Is hook or reel driver jommed with thread? (See page 18 for removal procedure.) Is hook ériving shaft properly set? (See page 24.) Is feed dog striking sides of slots in throat plate? (See page 14.) Is feed forked connection domoged or bent? Are feed rock shafts properly set? (See page 25.) Is cam stack worm wheel set too close to driving worm on arm shaft? (See page 34.) Is height of index pins correctly set? Is connecting rod bent or burred? ‘TO "RUN-IN" THE MACHINE When a machine is completely assembled and adjusted, it should first be checked for binding or objectionable noise due to excessive end play. Lubricate the machine os instructed on pages 4 and 5. Then "run-in" the ma- chine with an electric moter for 5 to 10 minutes at medium speed or until all moving ports run smoothly when machine is turned ever by hand. “Running-in'” @ machine should be done after every installation of en orm shaft, @ hook driving shaft or cam selector mechanism, and after every general repair or overhaul.INDEX MACHINES 600 AND 603 PAGE ‘Arm Shaft (Horizontal), removal .. 23 Adjustment for Binding or End Ploy.» ‘Arm Shoft (Upright), removal. ‘Adjustment for Binding or End Payson ot cy Connecting Rod, removal Description of Machines... Feed Connection, removal. Feed Dog, removal... Height Setting Lengthwise Setting... Sidewise Setting... Feed Lifting Rock Shaft, removal ‘Adjustment for Binding or End Ploy. Feed Rock Sha, removal.ne ‘Adjustment for Binding or End Ploy... Hond Wheel, removal Hock (Rotating), removal. Timing Adjustment... Position in relation to Needle... Hock Driving Shoft, removal ‘Adjustment for Binding or End Ploy.. Inspection, Lint Wiper, remove... Position of... 2028 2 Lubrication. ee 45 Motor, removal... i 30 Needle Bar, removal... ‘Adjustment for Side Shake. Centralizing Height Setting. Position in relation to Throat Plate Needle Bor Vibrating Bracket, removal. Needle Thread Take-up, removal... Presser Bar, removel.. Height Setting... Pull-off Finger, removal Position in relation to Needl Reel Tension. Sewing Difficulties. Stitch Length Regulator, removal. Tension Assembly, removal Check Spring Adjustments. Needle Thread Tension Tension Indicator Stop. Thread Clearances.. Adjusting for Thread Clearance... Throat Plate Position Bracket, removal... Winding Mechanism, removal... ‘Actuating Lever Adjustment. Actuating Lever Sto Reel Driver Adjustment. Wiring Diagram. BS ERBBRS MACHINE 600 ONLY Bight Amplitude ond Pettern Selector, removal. 37 Stop Plate Settings... 38 Cam Stack, removal 34 ‘Cam Selector Ari Shaft and Followers, removol.. 35 Com Selector Atm Stops... 36 Index Pin Adjustmentsseces. 135 Selector Lever Alignment. Timing Cam Stack... f Needle Bar Driving Arm, removal... Centralizing Driving At Release Mechanism, removal. Adjusting Release Mechanism. Loading Cam Adjust MACHINE 603 ONLY Bight Amplitude Selector, removal... Stop Plate Settings... Disc Driving Worm Wheel, removal. Timing Worm Wheel Assembly 44 44 Aa 43 Dise Follower Assembly, removal... Index Pin Adjustment: Timing Disc Follower Assembly.. Needle Bar Driving Arm, removal... Disengaging Mechani sm.ssa.