SINGER 1371A2 User Manual

INSTRUCTION MANUAL

AND

ILLUSTRATED PARTS LIST

FOR

SINGER

MACHINES

1371A1 1371A2 1371A3

THE SINGER COMPANY

Contents

ffiffliiiBfl

Instruction...................................................................................................................................... 1

Illustrated Parts List

....................................................................................................................................42

Frame and Miscellaneous Cover Components.......................................................................................43

Main Shaft Components...........................................................................................................................44

Hook Driving Shaft Components........................................................................................................ 45

Presser Bar Work Clamp Carrier Components...................................................................................... 46

Needle Bar Frame Components...............................................................................................................47

Overedging Width Adjusting Components

............................................................................................

Needle Thread Trimmer Components.....................................................................................................49

8. ШтШ'Ш

Bobbin Thread Trimmer Components ■

........

.........................................................................................50

Knifebar Components...............................................................................................................................51

10.

Feed Cam and Tripping Segment Components

11.

....................................................................................

Stop-Motion Components..................................................................................................................... 53

12.

Tripping Lever Components.................................................................................................................. 54

13.

Thread Tension- Components................................................................................................................55

14.

Lubrication Mechanism Components....................................................................................................56

15.

Speed Transmitter Components.............................................................................................................57

16.

Motor Pulley Components......................................................................................................................58

17.

Machine Head Accessories......................................................................................................................59

18.

Needle Safety Plate Components...........................................................................................................60

19. Ш1Ф

Accessories............................................................................................................................................. 61

20.

Table Cutout Drawing............................................................................................................................62

INSTRUCTION MANUAL

^HOW TO INSTALL THE SAFETY^ PLATE ^

a. ^®TjN^g,

Install the safety plate at the position shown in the figure by means of safety plate installing bracket set screw.

GR3715

INSTRUCTION FOR SET UP

1. ##Hl^!Sa

1. Screws used for set up Pig.a

® ® ©

F zfzinSBBlEW»

2. ^iiiSS]5ffSI5ftKlSse:

fSo

2. Attaching the shifter driving pin (asm.)

1) Fully apply the supplied grease to the pin of the shifter drive pin (asm.)® and the

Ba Fig.a

rubber surface on the rear see Figure Fig.b

2) Using screw ® , fix the shifter driving pin (asm.) on machine head base ©.

3) Using screw ®, fix driving pin base ® on the rear surface of the machine head base so that the shifter driving pin moved up and down smoothly.

4) Install snap ring ® on the shifter driving pin (asm.).

3. Sc

2)Mli4T

3 Installing transmitter (asm.) and shifter base (asm.) pig.c

1) Place machine head base ® with its rear surface facing toward you.

2) Fix transmitter (asm.) ® by screw ©

3) Fix shifter base © by screw ®

4) Attach shifter tension spring ® to shifter stopper bracket (asm.) © and shifter tension spring bracket © of the shifter stopper base (asm.).

4. sd

4. Supplied with the reducer (asm) Fig.d

1) Fix tension pulley coupling © by hexagon screw © supplied with the reducer (asm.).

2) Install stud © and machine head base seat felt © on machine head ©.

3) Fully lubricate the shifter driving pin and the driving pin base again. Also lubricate the end of the shifter driving pin and the head of the screw of the shifter pin bracket.

mMmj i>25mwmin±o

5. Installing the machine head base (asm.) Fig.e

1) Fix drain funnel Q to the drain hole (<^25) in the table by wood screw ®.

2) Placing the machine head base (asm.) on the table, fix it by tightening nut ® (flat washer ® is used) from the bottom of the table.

itmi^, ©iit^;5&<}#HiiM;^^0.5mm(«^)o(#

6. installing the motor Fig.f

1) Install motor ® on motor base © by screw © (flat washer ®, spring washer ®, and nut® are used).

2) Placing spacer ® between the table bottom and the motor base, fix the motor base by installing bolt © (a flat washer ® and nut ® are used). Tighten the nuts so that the lower nut is levelled with the end of bolt © or bolt © projects by 0.5 mm.

à-''.,

yi ■ i ■'■ "i. .

rT7'rc=^l^'' *^-

i‘ '" -BSt':-

2) ÿè -^: rt ^ j]p ')È ^ tb ?f i o

CAUTIONS IN OPERATION

1) The machine should rotate counterclockwise as observed from the pulley. Take care not to rotate the machine in the opposite direction.

2) Never start the machine before filling the machine base with lubricating oil.

3) Remove the bobbin case and the needle thread from the machine before performing the

trial operation.

4) Clean up the sewing hook and the bobbin thread trimmer every day after sewing work. Also check the level of the lubricating oil.

5) Never bring your fingers or hair close to, or place anything on the handwheel, V-belt, bobbin winder wheel or motor during operation. It may lead to serious personal injuries.

6) If your machine is provided with a belt cover, finger guard and eye guard, never

operate your machine with any of them removed.

1. MOTOR PULLEY AND V BELT ^

Wà

2ç>omi6ï

3000$^/5h

2600$t/5h

3000$^/5->

50HZ GD370 GE137 GE137

50HZ GD370H

60HZ

GD370HH

GE136

GD370L GE137L

GE137H

VMlÈÎiïiftiS)

GE137

1) Motors of 370w, 4-pole are used three-phase operation. (If a 250W motor has to be used for single-phase, operate the machine at 2600 s.p.m. or less, according to order form)

2) M-type V belts are used.

3) Refer to the following table for the motor pulleys, V belt, and sewing speed.

Sewing speed Frequency

2600 s.p.m.

3000 s.p.m. 2600 s.p.m.

3000 s.p.m.

50HZ

60HZ

Motor pulley Part No.

GD370 GE137

GD370H GE136

GD370L GE137L GE137

GD370HH GE137H

High speed

Vbelt

Low speed

Vbelt

GE137

* How to install motor pulley pig.i

Place motor pulley ® into the motor shaft so that flat part ® of the motor shaft aligns with first setscrew ©. Then securely tighten setscrews © and ®.

* ®2

BP^o

* How to install V belt pig.2

1) Mount high-speed V belt © on accelerating pulley © and the large diameters of the motor pulley.

2) Mount low-speed V belt ® on low-speed pulley ® and the small diameters of the motor pulley.

•8-

3) By moving the motor from side to side, adjust the tension of V belts ® and ® so that they give an approx. 10 mm slack when their middle portions are pushed lightly by hand.

4) Move the motor pulley back and forth to align V belts ® and

JSU«

Motor pulley

r jp, • s. ;■ «• -

2. SETTING UP THE THREAD STAND Figs

Assemble the thread stand, and fix it in the table hole. Then tighten lock nut ® to fix the thread stand. If ceiling wiring can be made, pass the power cable through spool rest rod

(2).

Putting cushion ® into hinge ®, insert hinge ® into the machine head. Then, place the machine head on the machine base.

i ; i:''A?/

4. AtTACHiNdimE FLAT BELTFigi

siitwoin^sQsigigiih.

4)® Ain iftif ^11 c

1) Removing screw ®, remove spring @ from the suspension screw. At this time, be careful not to push the starting link driving rod in the arrowed direction.

2) Pass belt ® through belt shifter ® so that the belt rotates in arrow ® direction.

3) Reinstall screw ® and spring @.

4) Lift tripping lever ® in the direction, pass the belt between latch B (§) and latch A @.

5) Passing belt shifter ® of the speed transmitter, attach the belt onto tension pulley d).

6) Put fixing pawl @ in the second groove from the bottom of ratchet © to provide the belt with tension.

(NOTE) Some expansion or contraction in the belt caused by temperature or humidity

may make it rather difficult to install the belt. However, the belt will restores its original length while in use.

5. INSTÀLLÀTION/REMOVÀL OF BELT COVER Fig.6

Aligning guide pin @ with hole ® in belt cover ®, push the belt cover in the arrow direction until it snaps. For removal of the belt cover, bring down the belt cover in the direction opposite to the arrow, and slide it up.

l>l#Singer ”^ito

lUTBiiS'^iPyi o

* ®8

^zwmimo

* Before starting the machine: Fig ?

1) Fill the oil reservoir of the machine base with singer oil type C up to the level indicated by "HIGH”.

2) Supplement the oil when the oil level has lowered below the bottom line of oil gauge

3) When the machine has been properly lubricated, the oil is seen to run through the pipe

from oil sight window (D. (Low speed operation permits easier observation of the

lubricating oil.)

Drain dirty oil by loosening oil drain screw ®, and fill the oil reservoir with fresh oil.

* Adjusting the lubrication for the sewing hook Fig.s

Adjust the volume of lubricating oil supplied to the sewing hook by turning oil adjusting

screws ® for rough adjustment, and (D for fine adjustment; oil volume is reduced when turning the screws clockwise.

* Other lubricating points

1) Apply one or two drops of lubricating oil to the arrowed points once a week or every other week.

2) Apply two or three drops of lubricating oil only to (S) point when the machine is newly set up or has been out of use for a long time.

7. HOW TO INSTALL THE'NEEDLEFig.9

* *ta®Mmttftlj586iafflttSingerN-1955

ilm«o

* Turn off the motor power. Use needle cat. No. 1955-01.

1) Loosening needle setscrew ®, hold needle ® with its recessed part facing toward the

operator,

2) insert the needle fully into the needle clamping hole, and

3) securely tighten the needle setscrew.

1) Lift up and hold bobbin case latch lever ® between two fingers to remove it from the hook.A bobbin does not fall off the bobbin case while the latch lever is lifted up.

2) For installation of the bobbin case, push the bobbin case into the hook so that it is

supported by the hook shaft, and then snap in the latch lever.

SlO Fig.lO

mil '■

9. WINDING THE BOBBIN Fig.ii

i5iiiaiSK«Titi#, #iHT!titiiiciDgK®a*ijiTi.

5)';^m&is\¡¡¡-9m, ttjtitiiEffiiSiSisfts.

1) Fit a bobbin onto the bobbin winder shaft.

2) Take the thread from the spool and pass it through the guides in the numerical order shown in the figure, and wind the end of the thread several turns around the bobbin.

3) Push the bobbin winder trip latch in the arrow direction, and the bobbin will be wound.

4) Loosening the adjusting nut, perform adjustment by screwing in or out the adjusting screw so that the bobbin is wound about four-fifths full.

5) If the bobbin is wound unevenly, adjust the position of the bobbin winder tension

bracket for proper and even winding.

T/i •*■__!- -

’16. AtfACi^Nil fHe BOBBiN fI^

1) Hold and place a bobbin into the bobbin case so that the bobbin is wound counterclockwise.

2) Passing the thread through thread outlet ® of the bobbin case, pull the thread, and

the thread can be drawn out from thread outlet (b),. passing under the bobbin winder

tension spring. * Set the bobbin so that it rotates in the arrow direction when the bobbin thread is pulled.

1) Pass the needle thread in the order as shown in the figures.

12. REDUCTION OF SEWING SPEED AND EMERGENCY STOPFigH

®^go

2)mWALBP^/^jg;3Ii5ito *

®^go

2nmm±m9^o

* Reduction of sewing speed

1) Turn hand stop crank ® downwards to position ®, and

2) the machine will be immediately slowed down.

* Emergency stop

1) Turn the hand stop crank downwards to position ® , and further upwards to position

® and

2) the machine will stop immediately.

When you want to feed fabric manually after giving an emergency stop or to resume sewing from the point at which thread was broken, rotate manual feed handle © to operate the cloth feeding mechanism.

(NOTE) Confirm that the needle does not stick in fabric before turning the manual feed

handle.

i4.Rif±t;o7iPf BB16

14. HOW TO HOLD THE DESCENDING KNIFE Fig le

When you do not want to cut fabric after sewing because of thread breakage or some

other reasons, keep on pressing down knife stop lever ® lightly until the machine stops. Then the knife will not descend.

BB17

15.TYPES OF STITCHESFig.i7

mmmm

iP-mmm)

This machine is capable of forming two different types of stitches, namely whip stitch and purl stitch. (Whip stitch) The whip stitch is formed in zigzag showing the needle thread only on top of fabric, and the bobbin thread on the bottom. (Purl stitch) When applying higher tension to the needle thread to permit it to pass straight through fabric, the purl stitch is formed by the bobbin thread which is pulled over from both sides to the center line.

Whip stitch

Purl stitch

16.THREADyriNSiON Й8.18 . ^

* щшшйшт^мт^

Pallarel side seam

Bar tacking seam

ai7 Fig.l7

■ '.Л ::^’Л •

•' '■ ■ ‘ Л*'

(Ш2Ш^^-Р.ШШ)

* тшш(^шш)

* Adjusting the thread tension for purl stitch:

1) Adjust the bobbin thread tension to approx. 15 to 20g by adjusting screw ® of the bobbin case.

2) Adjust tension controller No. 1 ® for proper needle thread tension so that the bar-tack

part is formed by well-shaped whip stitches. If the tension is too low, bar tacking seam may form thread knots on the rear face of fabric.

3) Adjust tension controller No. 2 ® for proper tension of the pallarel side seams by

judging from the stitch formation.

* Adjusting the thread tension for whip stitch:

2) Exchange the adjusting springs of tension controllers No. 1© and No.2 ® each other (the tension controller No.2 will have a weak spring).

3) Adjust tension controller No.2 ® to prevent ravelling off at the end of a seam.

4) The stitches of the parallel sides or bar-tack can be adjusted by tension controller No. 1

®.

* Adjusting the thread take-up spring (for purl stitch)

The suitable range of the stroke of thread take-up spring © is from 6 to 8mm with a starting tension of 20 to 50g. For adjusting the stroke of the thread take-up spring, loose screw ©, and insert a thin screwdriver into the slit of tension post © to turn the tension post.

To adjust the tension of the thread take-up spring, insert a thin screwdriver into the slit of tension post ® to turn it, with screw © tightened. The tension of the thread tade-up spring increases when the tension post is turned clockwise, and decreases when turned counterclockwise.

^17.' ADJUSTING THE OVEREDOiNG LENGTHiBUnONHOLE LENGi^

2) ffi »#«?№&«# ®, fflffi ®±ff . (-iaWZI «a« 1^ «ijs

it»!®«®.

3) -nLS.m, -№№ij]m]]7pmwL№i^^.

* ffiSftSWiSffl

iiaiSMi!i@*is«w«-!5igisiKijiw«ai#.

GM344/10

GM347/10 GM348/10

1) Pull out cover ®, and raise cover ®.

2) Loosen nut ® by the spanner supplied with the machine. Set point ® to a desired length on scale ® (this length is the same with the knife width), and then retighten nut®.

3) Through your trial sewing, adjust the overedging length accurately to the exent that the bar tacking seams are not cut by the knife.

l/4"~3/4"

1/4"~1"

l/4"~ 1—1/4"

* Changing the work clamp check

Use work clamp check ® having the size nearly the same as that of a buttonhole length. By removing setscrew ©, a work clamp checks can be changed together with a work clamp check holder as a set.