Singer 20U Parts Book (PDF)

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Text index — Singer 20U

Page 2 — SINGER 20U

Singer 20U parts on page 2
RefPart numberPart nameQty
504048
549349
541925
504028
541950
541762
545825
549366
52454
504145
541709
52024
505372
541940
541948
541904
505314
541786
504084
541943
504067
541645
504005-451
548061
541912
504069
504070
541607
541605
504133
504120
32618
505009
549356
541916
541652
545495
541606
504029
545045
504095
99686
99646
99686
504066(2)
541651
541653
545354
154759
56024
154981
541751
549387
541699
505322
505339
541908COVER
504083SHAFT
11170COLLAR
505343SPRING
545092SCREW(2)
52130SCREW
541708STUD
504134BRACKET
541922BRACKET
540472PLATE
504010SCREW
541698SPRING
541959PIN
541759SHAFT
541566BRACKET
541620PLATE
541619BRACKET
154884SPRING
541789SPRING(2)
541772BRACKET
154785PIN
541936PLATE
541784SHAFT
504056LEVER
505658SPRING
541771BRACKET
505351SPRING
505354SPRING
505355SPRING
505353PLATE
504086SCREW
541676BRACKET
541677BRACKET
541678BRACKET
541675BRACKET
541764BRACKET
55623WASHER
5404048BRACKET
541701SHAFT
541930SHAFT
541933PIN
541788BRACKET
541667SPRING
504114SCREW
541787BRACKET
541700SHAFT
549354PIN
541673BRACKET
541694BRACKET
504090SCREW(4)
504007BRACKET(3)
541674BRACKET
541693BRACKET
541692SHAFT
541689BRACKET
541680BRACKET
541765BRACKET
504088SCREW(3)
541902BRACKET
541770BRACKET
549336SCREW(2)
541682BRACKET
541665SPRING
504081BRACKET
541664BRACKET
541685BRACKET
541927BRACKET
541753SHAFT
541702SHAFT
541703SHAFT
545499COLLAR
45339COLLAR
125314SPRING
2102COLLAR
549857BRACKET
549858BRACKET
541704SHAFT
545498COLLAR
541941BRACKET
504066SHAFT(2)
541697BRACKET
541610BRACKET
505335SPRING
505334SPRING
504019SCREW
505408SHAFT
504072SCREW
505333SHAFT
541646SHAFT
505407BRACKET
504502SCREW
504068BRACKET
541683SHAFT
541923PIN
504002SHAFT
541648SHAFT
504504SCREW
541909BRACKET
505327SPRING
541778BRACKET
541775BRACKET
504071BRACKET
545931COLLAR
541779BRACKET
504099SCREW
541949PIN
541630BRACKET
541650BRACKET
541637BRACKET
504074BRACKET
541712BRACKET
154756COLLAR
545820PIN
540435BRACKET
504094BRACKET
545814COLLAR
549289SHAFT
504101SCREW
505326BRACKET
545767SHAFT
541695SHAFT
541608SHAFT
541686SHAFT
541924PIN
545056BRACKET
541688SHAFT
541690BRACKET

Page 3 — ACCESSORIES AND ATTACHMENTS

Singer 20U parts on page 3
RefPart numberPart nameQty
19131913BRACKET
4191541915BRACKET
55623(5)55623(5)CAP
505001(2)505001(2)SCREW
541817541817ARM
545035(2)545035(2)SCREW
545246(2)545246(2)SCREW
549288(21)549288(21)SCREW
549389
504509
542043
541917
504509
504084
548061
541918
541916
505384
505419
505418
505417
56073
5040992
541935
541631
5452462
541634
545098
5492882
541910
541641
541756
541642
5040482
541636
541749
541754
541635
541750
549119
541774
541911
504507
545047
5050012
504167
549294
5450352
540169-701
540165-701
540161-701
546922"A" OIL
546923"B" OIL
541558
541561
541514
556235
12403
CAT.1955
549281-001
541937
541515-001
541734
541516-001
541736-001
541781
505643
505655-001
541739
541742
541741
541743
541738
505008
547671
541740
545413

Page 4 — NUMERICAL LIST OF PARTS FOR 20011/13 "M"/CS

Singer 20U parts on page 4
RefPart numberPart nameQty
691 (850)Throat Plate Screw (2)
2102Tension Disc (2)
11170Presser bar Spring Washer
32618Clamp Stop Motion Clamp Flanged Bushing
32758Thread Take-up Spring
36535Thread Cutter and Holder
691 (650)Throat Plate Screw (2)
52618Clamp Stop Motion Clamp Flange
36555Thread Cutter and Holder
45339Feed Regulating Stud Head Pin
52016Thread Take-up Lever Thread Eyelet Bushing
52024Thread Take-up Lever Thread
52150Rotating hook Bobbin
52454Thread Retainer Pin
55623Presser Bar Spring
56024Feed Connecting Link
56046Presser Bar Spring
56073Bell Crank Spring
99646Arm Shaft (horizontal) Flanged Bushing (back)
99686Presser Bar Lifter
99691Tension Indicator Flange Washer
125314Tension Spring
154756 (851)Clamp Stop Motion Clamp Stop Screw
154759 (850)Feed Connecting Link Hinge Screw
154785Bed Plate Bracket Screw (2)
154759 (809)Bed Slide Spring Screw (2)
154884Bed Slide Spring
154981 (819)Feed Connecting Link Hinge Screw
504002 (850)Rotating Hook Drive Shaft Bushing (back) Screw
504005-451Clamp Stop Motion Clamp Screw (Spec. No. 1030 Chrome Nickel Satin Finish)
504007 (850)Rotating Hook Set Screw (3)
504010 (851)Needle Bar Connecting Link Screw
504019 (850)Feed (Upper) (Lower) Screw
504028 (850)Arm Shaft (horizontal) Flanged Bushing (back) set Screw
504029 (850)ZigZag Triangular Cam Shaft Bushing Set Screw
504032 (805)Rotating Hook Bobbin Case Latch Stop Screw
504047 (830)Tension Stud Set Screw
504048Bight Amplitude Slide Block Shaft Bushing Collar Screw (Spec. No. 1050) (2)
504048 (850)Thread Retainer Set Screw
504056 (830)Presser Bar Lifter Pin Set Screw
504057 (805)Needle Bar Connecting Link Cap Screw
504063 (825)Presser Foot Screw
504066 (830)Arm Shaft (horizontal) Bevel Gear Set Screw (2)
504068 (803)Feed Bar Screw Center (2)
504069 (833)Feed and Feed Lifting Eccentric Position Screw
504070 (833)Feed and Feed Lifting Eccentric Set Screw
504071 (833)Arm Top Cover Screw (back)
504072 (803)Feed Lifting Rock Shaft Screw Center (2)
504074 (852)Feed Regulating Stud Head Screw
504077 (803)Needle Bar Connecting Link Adjusting Screw
504083 (852)Presser Regulating Thumb Screw
504084 (810)Bight Amplitude Stop Plate (left) (right) Screw (2)
504086 (806)Rotating Hook Bobbin Case Tension Regulating Screw
504087 (806)Rotating Hook Bobbin Case Spring Screw
504088 (803)Rotating Hook Section Screw (3)
504090 (803)Rotating Hook Thread Guard Screw (4)
504091 (810)Needle Bar Set Screw
504094 (850)Feed Regulating Stud Set Screw
504095 (850)Thread Take-up Crank Position Screw
504099 (809)Bell Crank Set Screw
504101 (850)Arm Shaft (horizontal) Flanged Bushing (front) Screw (2)
504102 (830)Arm Shaft (upright) Bevel Gear (upper) Set Screw
504114 (809)Needle Clamp Thread Guard Set Screw
504120 (803)Needle Bar Set Screw
504133 (850)Arm Shaft (horizontal) Flanged Bushing (front) Set Screw
504134 (850)Needle Bar Frame Pin Set Screw
504145 (809)Bight and L-C-R Position Lever Set Screw (2)
504167 (805)Feed Regulator Set Screw (small)
504169 (809)Feed Connecting Rod Nut (2)
504170 (810)Feed Lifting Hook Shaft Center Nut (2)
504171 (819)Feed Lifting Hook Shaft Screw Center Nut (2)
504172 (809)Bight and L-C-R Position Lever Thumb Stud Nut
504173 (809)Feed Lifting Rock Shaft Roller and Stud
504174 (809)Feed Lifting Rock Shaft Roller and Stud
504175 (809)Feed Lifting Rock Shaft Roller and Stud
505000Clamp Stop Motion Clamp washer
505001Feed Oil Tube (for Feed Forked Connection)
505322Feed Forked Connection
505323Feed Lifting Rock Shaft Crank with 504019
505327Feed Lifting Rock Shaft Crank Connecting Rod with 504019
505328Feed Lifting Rock Shaft Crank Connecting Rod Cap (felt)
505333Feed Rock Shaft
505335Feed Rock Shaft Complete, Nos. 505333 and 505335
505353Presser Bar Guide Bracket with 504028
505354Rotating Hook Bobbin Case Latch, Nos. 505353, 505354 and 505355
505355Rotating Hook Bobbin Case Latch Lever Fulcrum Pin
505356Rotating Hook Bobbin Case Latch Spring
505372Thread Take-up Lever Link Hinge Pin
505374Thread Take-up Spring Regulator
505384Bell Crank Complete, Nos. 505373, 505417, 505418 and 505419
505407Feed Bar Screw Center 504068 with 504502 (2)
505408Feed Lifting Rock Shaft Screw Center 504072 with 504504 (2)
505417Bell Crank Bracket
505418Bell Crank Bracket
505419Bell Crank Bracket
505427Rotating Hook Drive Shaft Retainer Collar with two 504086
504028Arm Shaft (horizontal) Flanged Bushing (front)
505658Presser Bar Lifter Pin
540435Feed Rock Shaft Stud Lock Pin
541566Presser Foot (spring hinged) Complete
541605Arm Shaft (horizontal)
541606Arm Shaft (horizontal) Bevel Gear with two 504066
541607Arm Shaft (horizontal) Worm Gear with two 504028
541608Arm Shaft (upright)
541609Arm Shaft (upright) Bevel Gear (lower) with two 504101
541610Arm Shaft (upright) Bevel Gear (upper) with two 504101
541611Arm Side Cover
541619Bed Slide
541620Bed Slide Complete, Nos. 154884, 541619 and two 154789
541623Bight and L-C-R Position Lever Complete, Nos. 545413 and 549285
541630Bight Amplitude Regulating Plate Spring
541631Bight Amplitude Slide Block
541634Bight Amplitude Slide Block Crank Link
541635Bight Amplitude Slide Block Crank Shaft
541636Bight Amplitude Slide Block Crank Shaft Bushing

Page 5 — NUMERICAL LIST OF PARTS FOR 20U11/13 M/CS

Singer 20U parts on page 5
RefPart numberPart nameQty
541637Bight Amplitude Slide Block Crank Shaft Bushing Collar with two 504048
541639Bight Amplitude Slide Block Crank Spring
541641Bight Amplitude Slide Block Guide with 545098
541642Bight Amplitude Slide Block Guide Stud
541643Feed and Feed Lifting Eccentric with 504069 and 504070
541646Feed Bar
541647Feed Dog
541648Feed Lifting Rock Shaft with 504751
541649Feed Lifting Rock Shaft Complete, Nos. 505326 and 541648
541650Feed Regulating Stud Head with 45339
541651Feed Regulator with 545045
541652Feed Regulator Hinge Stud
541653Feed Regulator Hinge Stud Flanged Bushing
541654Feed Reverse Lever with 545046
541657Needle Bar (hollow)
541661Needle Bar Connecting Stud
541662Needle Bar Connecting Stud Complete, Nos. 504091 541661, 541664, 541665 and 545091
541664Needle Bar Connecting Stud Hinge Pin
541665Needle Bar Connecting Stud Hinge Pin Washer
541667Needle Clamp
541638Right Amplitude Slide Block Crank Spring
541671Rotating Hook with three 504088
541675Rotating Hook Complete, Nos. 541671, 541694 541765 three 504088 and 504090 (for agents only)
541674Rotating Hook 541673 with 541680
541676Rotating Hook Bobbin Case with 504086, 541764
541677Rotating Hook Bobbin Case Complete, Nos. 504032 and 541764
541678Rotating Hook Bobbin Case Holder
541680Rotating Hook Drive Shaft
541682Rotating Hook Drive Shaft Bevel Gear (back)
541684with two 504101
541685Rotating Hook Drive Shaft Bevel Gear (front) with two 504101
541686Rotating Hook Drive Shaft Bushing (back)
541688Rotating Hook Shaft Bevel
541689Rotating Hook Shaft Bevel Gear with two 504101
541690Rotating Hook Shaft Bevel Gear (front)
541692Rotating Hook Shaft Bushing (short)
541693Rotating Hook Shaft Retainer Collar with two 504007 (2)
541694Rotating Hook Thread Guard
541695Set of Gears (lower, back) Nos. 541609 and 541684
541696Set of Gears (lower, front) Nos. 541685 and 541690
541697Set of Gears (upper) Nos. 541606 and 541610
541698Slack Thread Regulator
541699Tension Complete, Nos. 3273, 505400, 541702, 541704, 541704, 541705, 125314 and two 2102
541700Tension Releasing Lever
541701Tension Releasing Lever Spring
541702Tension Releasing Pin
541703Tension Stud
541704Tension Stud 541703 with 545498 and 545499
541707Thread Take-up Lever
541708Thread Take-up Lever with 52130
541709Thread Take-up Lever Complete, Nos. 52024 and 541708
541711Zigzag Stitch Regulator Fork
541712Zigzag Stitch Regulator Fork Eccentric Connection
541723Presser Bar Lifting Bracket with 541723 and 549550
541725Presser Bar Lifting Shaft
541749Right Amplitude Slide Block Crank Shaft Bushing Washer
541750Right Amplitude Slide Block Crank Shaft Ring
541751Feed Forked Connection 505322 541651, two 154759 and 154981
541753Arm Shaft (horizontal) and Needle Bar Crank Complete Nos. 505339 and 541605
541754Right Amplitude Slide Block Crank Shaft Knob 541774 with 541635, 541750 and 549119
541756Right Amplitude Slide Block Guide 541641 with 541631
541759Needle Bar Frame Clamping Stud
541762Arm Top Cover Spool Holder
541764Rotating Hook Bobbin Case Tension Spring
541765Rotating Hook Section
541770Needle Bar Timing Indicator Plate
541771Bed Plate
541772Bed Plate Bracket
541773Bed Plate Complete, Nos. 541771 with 541772 and 504069
541774Right Amplitude Slide Block Crank Shaft Knob
541775Feed Reverse Lever Return Spring
541779Feed Reverse Lever Link with 504071
541780Feed Reverse Lever Return Spring Bracket (hook)
541784Feed Reverse Lever Hinge Stud
541786Rotating Hook Bobbin Case Holder Position Bracket
541787
541789Needle Clamp Thread Guard
541790Needle Clamp Complete, Nos. 504027, 504114, and 541787
541904Arm Top Cover (cotton)
541905Arm Top Cover Complete, Nos. 505314, 541762 and 541764
541908Face Plate with 546761
541909Right and L-R Position Lever Arm
541910Right and L-R Position Lever Arm
541911Right and L-R Position Lever Thumb Stud (Spec. No. 1019)
541912Right Amplitude Regulating Plate (left)
541913Right Amplitude Regulating Plate (right)
541915Right Amplitude Regulating Plate Holder and Right Amplitude Regulating Plate Complete, Nos. 541630, 541912, 541913, and 541946
541916Right Amplitude Stop Plate (left) (right) (2)
541917Lever Connecting Rod
541918Lever Connecting Rod
541921Needle Bar Frame
541922Needle Bar Frame Pin
541923Needle Bar Frame Shaft (long)
541924Rotating Hook Drive Shaft Bushing (front)
541925Needle Bar Connecting Link
541927Needle Bar Connecting Link Guide
541928Right Amplitude Slide Block Crank 541935 with 541612, 541750, 541918, and two 549288
541930Arm Shaft (hollow) 541657 with 541933
541931Needle Bar Connecting Link with 54077
541932Needle Bar Connecting Link 541930 with 541002
541933Arm Shaft (hollow)
541935Needle Bar Frame Shaft Bushing (long)
541936Take-up Lever Guard
541940Bar Connecting Link Guide
541941Right Amplitude Slide Block Crank with two 545246
541943Triangular Cam Shaft
541946Triangular Cam Shaft Bushing
541948Triangular Cam with two 549566
541949Right Amplitude Regulating Plate Holder.
541950Arm Top Cover (back) U-ring
541956Arm Top Cover (back) U-ring
542043Reinforcement Plate
545001 (819)Lifting Lever Connecting Rod Spring
545035 (805)Needle Bar Connecting Stud Hinge Pin Screw
545045 (835)Screw (2)
545046 (809)Feed Reverse Lever Stud Set Screw
545056 (835)Feed Reverse Lever Set Screw
545082 (803)Rotating Hook Shaft Bushing (long) Set Screw
545092 (810)Right and L-C-R Position Block Set Screw (2)
545098 (850)Right and L-C-R Position Lever Set Screw
545114Arm Top Cover (back) U-ring
545218 (852)Arm Top Cover (back) U-ring
545246 (806)Right Amplitude Slide Block Guide Stud Set Screw
545260 (806)Tension Spring
545335 (819)Arm Reinforcement Plate Screw
545354 (804)Right Amplitude Slide Block Crank Set Screw (2)
545413 (803)Tension Releasing Lever Hinge Screw
545495Tension Spring
545498Tension Spring
545499 (873)Tension Spring
545766Arm Shaft Bushing (lower)
545767Arm Shaft (upright) Bushing (lower)
545814Arm Shaft (upright) Bushing (upper)
545820Regulating Stud Bushing
545825Regulating Stud Lock Pin Spring
546701Arm Top Cover Screw (front) U-ring
547671Needle Bar Frame Clamping Stud Flanged Bushing
547672Low Latch Roller (roller)
547674Right and L-C-R Position Lever Thumb Stud Nut Washer

Page 6 — NUMERICAL LIST OF PARTS FOR 20U113 P/Cs

Singer 20U parts on page 6
RefPart numberPart nameQty
548061Bight Amplitude Stop Plate (left) (right) Washer (2)
549119 (850)Bight Amplitude Slide Block Crank Shaft Knob Set Screw
549285 (803)Bight and L-C-R Position Lever Screw Pin
549285 (830)Bight Amplitude Slide Block Crank Link Hinge Screw (2)
549289 (803)Feed Regulating Stud
549290 (819)Zigzag Stitch Regulator Fork Eccentric Connection Pin Set Screw
549294 (805)Arm Screw
549330 (810)Presser Bar Lifting Shaft Link Hinge Screw
549336 (825)Arm Side Cover Set Screw (4)
549336 (825)Needle Bar Timing Indicator Plate Screw (2)
549349 (856)Arm Reinforcement Plate Screw (front)
549354Needle Bar Frame Clamping Stud Screw
549356 (850)Bight Amplitude Regulating Plate Holder Set Screw (2)
549366Zigzag Triangular Cam Shaft Set Screw (2)
549376 (850)Feed Dog Screw (2)
549385Bight Amplitude Regulating Plate Thumb Screw (Spec. No. 1019) (2)
549387Bight and L-C-R Position Lever Arm Regulating Screw (Spec. No. 1050) (2)
549389Lifting Lever Hinge Screw (Spec. No. 1050)
549426Bight and L-C-R Position Block Washer (2)
549857Tension Indicator
549858Tension Indicator Flange
CAT-1955Needle (size #14) with Pontoon C.A.L.
12403Arm Spool Pin and Thread Eyelet
55623Rotating hook bobbin (5)
SC5643Presser Foot (spring hinged) Complete (for straight stitching)
540181-701Arm Top Cover Spool Seat Complete
540165-701Arm Top Cover Spool holder Thread Lead-off (large) Complete
540169-701Arm Top Cover Spool holder Thread Lead-off (small) Complete
541514Screw Driver (small)
541515-001Cloth Guide (purchased part)
541516-001Hemmer Foot (1/8 hem) (purchased part)
541558Screw Driver (large)
541561Screw Driver (for throat plate)
541734Feed Dog (for straight stitching)
541736-001Zipper Foot (purchased part)
541781Presser Foot (spring hinged) Complete (for buttonholing)
541937Throat Plate (for straight stitching)
546922Oiler (130 cc, filled with Singer type "A" oil) (for treadle drive)
546923Oiler (130 cc, filled with Singer type 'b' oil) (for electric drive)
549211-001Cloth Guide Screw (purchased part)
CAT-1955Needle (size #14) with Pontoon C.A.L. (3)
505008Bobbin Winder Spool Pin Washer (felt)
SC5055-001Universal Bobbin Winder Complete (include two wood screw) (purchased assembly)
541738Bobbin Winder Spool Pin
541739Bobbin Winder Spool Pin Complete Nos. 505008, 541738, 541740, 541742, 545413 and 547671
541740Bobbin Winder Spool Pin Bracket
541741Bobbin Winder Spool Presser Plate (Lady)
541742Bobbin Winder Spool Presser Plate Complete Nos. 541741 and 541743
541743Bobbin Winder Spool Presser Plate O-Ring
545413 (850)Bobbin Winder Spool Pin Nut
547671Bobbin Winder Spool Pin Spring Washer
549330 (825)Arm Side Cover Set Screw (2)
549365 (850)Feed Dog Screw (2)
505643Presser Foot (spring hinged) Complete (for straight stitching)
540101-701Arm Top Spool Seat Complete
541782Throat Plate (for straight stitching)
549271-001Cloth Guide Screw (purchased part)
505055-001Bobbin Winder Spool Pin Set (include two wood screw) (purchased assembly)

Singer 20U — parts catalog