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Singer 221 Service Manual

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Download this manual See also: Service Manual, Manual
Supplement
to
Form 21325
Machine 221
(566)
SERVICE MANUAL
SINGER*
MACHINE 221

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Summary of Contents for Singer 221

  • Page 1 Supplement Form 21325 Machine 221 (566) SERVICE MANUAL SINGER* MACHINE 221...

  • Page 3: Stitch Length Regulator

    Feed dog height: .040 inch above throat plate. Manually controlled bobbin winder attached belt guard. Needle, Cat. 2020 (15xl), threaded from right to left. STITCH LENGTH REGULATOR BOBBIN-WINDING THREAD GUIDE 221.1- SERIES 3 221K4· CAK7 MOTOR 221K5- CAJ6-8 221K7:'CAK8-8...
  • Page 4 Before inspection to find causes of faulty opera- CAUTION: KEEP VARSOL AWAY FROM ALL RUBBER PARTS. tion, machine should thoroughly cleaned and lubricated. Note: Under extreme conditions (if grease Remove face plate throat plate. Open dirt hard tacky) remove motor, light top cover and remove...
  • Page 5 Entrance of oil into motor may cause failure MOTOR LUBRICANT of electrical components. sold by The Singer Company. motor grease tubes, Fig. should refi lied every 6 to 12 months, depending on machine usage.
  • Page 6 When presser foot is raised to highest point, dis- Loosen, guide bracket set screw shown in Fig. 8 tance between bottom of presser foot and top surface and raise or lower presser bar as required to obtain of throat plate should be 5/16 inch, as shown in Fig. correct he ight.
  • Page 7 With feed dog at highest poi nt, approxi mate Iy the full depth of rear teeth should project above surface of throat plate. Loosen hinge on FEED LIFTING ROCK SHAFT, Fig. 12, and turn eccentric hinge screw unti I high poi nt of eccentr ic is toward rotary hook shaft.
  • Page 8 CENTER CENTER SET SCREW SET SCREW FEED LIFTING ROCK SHAFT centers In place. To move feed dog toward left, gently right hand center of the feed rock shaft and feed ifting rock shaft to the left unti feed correctly positioned. Then tighten four...
  • Page 9 BUSHING SET SCREW T urn hand wheel over toward operator unti I needle is at lowest point. At this position, upper timing mark, Fig. 14, should be just visible at lower edge of needle bar bushing. Loosen clamp screw/ Fig. 14, and raise or lower needle...
  • Page 10 Remove throat plate and turn hand wheel over toward operator unti I lower timing mark on needle bar is at lower edge of needle bar bushing on its upward stroke. With needle bar in this position, di stance between the side of needle and point of hook, as shown in insert in Fig.
  • Page 11 CAUTION: In gear driven machines, do not disturb mesh of bevel gears. The take-up spring, Fig. 19, should complete action and be at rest against take-up spring stop as point of needle enters material. To adjust the take-up spring stroke, loosen TAKE·UP screw,...
  • Page 12 With machine threaded, lower presser bar to en- gage tension and turn tension regulator dial to zero (0) position, Fig. 21. Hold thread on both sides tension regulator pull back forth through tension discs. tension on the thread should just slightly perceptible, which...
  • Page 13 TO ELIMINATE END PLAY OR BINDING OF HORIZONTAL ARM SHAFT Shou Id the hori zontal arm shaft require adjustment play or binding, remove hand wheel structed on page 23 to expose hand wheel bu shing. Loosen screws, Fig. move hand wheel bushing slightly...
  • Page 14 TO ELIMINATE END PLAY OR BINDING OF HOOK DRIVING SHAFT Binding may be caused by lack of lubrication clearance between needle and hook, see page or foreign material obstructing moving parts. Clean Place counterbalance against bushing and tighten and lubricate as instructed on page 5.
  • Page 15 1. Remove face plate. 2. Loosen set screw In needle clamp as shown in Fig. 27 and remove clamp. 3. Loosen clamping screw, Fig. 27, and lift needle bar up through bushing and out of machine. 1. Insert needle bar down through bushing shown in Fig.
  • Page 16 HINGE SCREW NEEDLE BUSHING SET SCREW AND WASHER 1. Remove face plate. 2. Remove presser and needle as instructed on page 3. Loosen screw, Fig .. 29, an.d remove needle bar bu sh ing. 4. Remove hinge screw and washer. 5.
  • Page 17 TAKE-UP SPRING THREAD GUARD 1. Make certain that releasing pin is In place shown in Fig. 2. Place tension discs, with convex sides together, on thread guard as shown in Fig. 32. 3. Pass eyelet of take-up spring under thread guard, keeping coils of spring...
  • Page 18 1. Replace bobbin case base in position as shown 1. Remove throat plate and bobbin case. 2. Remove gib screw, Fig. 34, 'and displace gib as in Fig. 35. Rotate it slightly until it seats. 2. Return gib to original position and replace screw.
  • Page 19 3. Adjust clearance between hook and needle, reset timing. (See page 10 for instructions.) 1. Remove needle, throat plate and bobbin case. 4. Repl ace bottom cover, bobbin case and throat 2. Turn machine over on rear side and remove bottom plate.
  • Page 20 Proceed instructed gear-driven machines Proceed instructed gear-driven machines except as follows: except as follows: 1. Do not di sturb wi ring. 1. Insert new shaft from the left. 2. Loosen screws in hook shaft pulley, Fig. 2. Insert shaft through pulley and belt.
  • Page 21 HINGE SCREW C FEED LIFTING ROCK SHAFT 1. Remove bottom cover. 1. Remove bottom cover 2. Remove A and eccentric Fig. disen- G, Fig. 2. Remove F and eccentric di sen- gaging feed lifting rock-shaft from feed connecting gagi ng feed rock shaft from feed forked connection.
  • Page 22 1. Loosen top cover screw and turn cover aside. 1. Insert connecting rod into upright arm through 2. Remove two cap screws, Fig. and remove bottom of machine, so that it fits around bottom connecting rod cap. half of pulley (or gear) hub on eccentric, Fig.
  • Page 23 UPRIGHT ARM SHAFT (GEAR-DRIVEN MACHIN ES) CAUTION: sets of bevel gears have been lapped remove upright shaft from this machine. If this becomes necessary, together at .the factory and should be kept in mesh machine should be returned to the factory. throughout all removals and replacements.
  • Page 24 bushing at hand wheel end on belt driven machines. gear-dr iven machine s, shaft through 1. Remove needle bar, presser bar and needle thread bevel gear then through eccentric and then through take-up as instructed on pages 15 and 16. bushing.

  • Page 25: Removals And Replacements

    REMOVALS AND REPLACEMENTS MOTOR CAUTION: Remove plug from electric outlet before MOTOR MOUNTING SCREW removing any electrical parts from machine. 1. Remove bottom cover. 2. Loosen motor mounting screw, Fig. and re- move motor be 3. Remove three-pin terminal fastening screw, Fig.
  • Page 26 SEWING DIFFICULTIES HINTS FOR ADJUSTERS AND MECHANICS Horizontal arm shaft or hook shaft binding. (See pages 13 and 14.) Excessive end play in hook driving shaft. (See page 14). Excessive end play in hodzontal arm shaft. (See page 13.) WHEN THREAD SNAGGING, SKIPPED STITCHES OR OTHER THREAD HANDLING DifFICULTIES OCCUR Correct...
  • Page 27 LINE LEADS CONTROLLER ..c_- ., THREE PIN ' - \ THR:~-PIN TERMINAL (FEMAL) TERMINAL (MALE) LINE LEADS CONTROLLER ,--I MOTOR ,---1 LIGHT WITH SWITCH '.._ J THREE PIN TERMINAL (FEMALE) LINE LEADS CONTROLLER MOTOR ----I "- __...

  • Page 28: End Cover

    SERIES 3 MOTOR END COVER (COMMU TATOR END) FIELD CORE SHIELD ARMATURE n -------------~ END COVER (CO: / UTATOR END)
  • Page 29 END COV ER (PULLEY END) FIELD CORE SHIELD FI ELD COR E INSULLATION SHIELD END COVER (COMMUTATOR END) PULLEY END COVER (PULLEY END) FIELD CORE SHIELD INSULLATION END COVER (COMMUTATOR END)
  • Page 30 Arm shaft, hor i zontal Lubr kat ion, mac hi ne....Upr ig ht Motor Descr ipti on..............Needle bar bushing Feed dog, he i ght He ig ht ..........•..In re lot ion to throat plate Pres ser foot, heig ht Feed rock...