Singer 1371A1 User manual

INSTRUCTION MANUAL
AND
ILLUSTRATED PARTS LIST
. FOR
SI N GE R
·MACHINES
1371 A1
1371A2
1371A3
THE SINGER COMPANY
From the library of: Superior Sewing Machine & Supply LLC

From the library of: Superior Sewing Machine & Supply LLC

Contents
flJ'lH~PJ}
Instruction······················································································································ 1
~1*~*
Illustrated Parts List······························.·········································································42
1. tJ1.~~HIHtf
Frame and Miscellaneous Cover Components ··································································· 43
2. J:~, ~~~?HIHtf
Main Shaft Components·································································································· 44
3. l'~~HIHtt=
Hook Driving Shaft Components··························: ·,4 ••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 45
4. JIJlt41i!*!t7t~.IHtf
Presser Bar Work Clamp Carrier Components······························ · ····································· 46
5. lt~H!M~7ttiHtf
Needle Bar Frame Components·································································· · ····················· 47
6. m9rJ~~if.Jm7ttiHtf
OveredgingWidth Adjusting Components ··········································································· 48
7. im ti Jif JJ 7t~JHtf
Needle Thread Trimmer Components ················································································ 49
8. JEf ~ JoJ ]] 7} til.1tf
Bobbin Thread Trimmer Components················································································ 50
9. t)J]] 7ttil.1tf
Knife bar Components···················· ·········································· · ······································· 51
10. l!*!f~~7ttil.1tf
Feed Cam and Tripping Segment Components ·································································· 52
11. ~M.lt.M7}ti1.1tf . -
Stop-Motion Components ······························································································· 53
12. :f-M1~:$7tti1.1tf
Tripping Lever Components················································································ · ··········· 54
13. ~ti,mti7ttil.1tt=
Thread !J'-ensioFl· Gomponents··························································································· 55
14. )IIJ )ft ~H1C 7ttil.1tf
Lubrication Mechanism Components ··············································································· 56
15. ~tJ1.~il7tti1.1tf
Speed Transmitter Components······················································································· 57
16. ~Htil.1tf
Motor Pulley Components······························································································ 58
17. tJ1.~~11tf
Machine Head Accessories ····························································································· 59
18. :tc:i:tli$1tf
Needle Safety Plate Components····················································································· 60
19. !Ift1tf
Accessories················································································································· 61
20. ~f&OO
Table Cutout Drawing ................................................................................................... 62
From the library of: Superior Sewing Machine & Supply LLC

fffflt}i~~
INSTRUCTION MANUAL
. 1.
From the library of: Superior Sewing Machine & Supply LLC

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Install the safety plate at the position shown in the figure by means of safety plate
installing bracket set screw.
GR3715
. 2.
From the library of: Superior Sewing Machine & Supply LLC

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• IN~I ~ flUCTION FOR SET UP
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1. Screws used for set up Fig .a
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®
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OOa Fig.a
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2. Attaching the shifter driving pin (asm.)
1) Fully apply the supplied grease to the pin of the shifter drive pin (asm.) CD and the
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.).
l¥lb Fig.b
. 3.
From the library of: Superior Sewing Machine & Supply LLC

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3 Installing transmitter (asm.) and shifter base (asm.) Fig.c
1) Place machine head base CD 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'.).
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OOb Fig.b
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4. Supplied with the reducer (asm) Fig.d
1) Fix tension pulley coupling CD 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.
. 4.
From the library of: Superior Sewing Machine & Supply LLC

OOd Fig.d
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5. Installing the machine head base (asm.) Fig.e
1) Fix drain funnel CD 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.
OOe Fig.e
. 5.
From the library of: Superior Sewing Machine & Supply LLC

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6. Installing the motor Fig.f
1) Install motor CD 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
G) 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.
OOf Fig.f
~
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. 6.
From the library of: Superior Sewing Machine & Supply LLC

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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.
- ~ · r : · - f:1! ~~ii *~i*o v ~.atm
~ \ •.xM:OTOR PULLI;YANO .V.e.EL.I
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2600$t /5t
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3000~ /)J\
50HZ
GD370H GE136 GE137
2600~/)t
60HZ
GD370L GE137L GE137
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60HZ
GD370HH GE137H GE137
. 7.
From the library of: Superior Sewing Machine & Supply LLC

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 Motor pulley Part No.
High speed
Vbelt
2600 s.p.m. 50HZ GD370 GE137
3000 s.p.m. 50HZ GD370H GE136
2600 s.p.m.
60HZ
GD370L
GE137L
,,
3000 s.p.m. 60HZ
GD370HH
GE137H
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* How to install motor pulley Fig.l
Low speed
Vbelt
GE137
GE137
GE137
GE137
Place motor pulley CD into the motor shaft so that flat part ® of the motor shaft aligns
with first setscrew®. Then securely tighten setscrews® and®.
001 Fig.1
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* How to install V belt Fig.2
1) Mount high-speed V belt CD 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.
From the library of: Superior Sewing Machine & Supply LLC

3) By moving the motor from side to side, adjust the tension of V belts CD 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 CD and ®.
® I!!IILmle
Motor pulley
i!l2 Fig .2
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.2. fSETTING U~!t::IJ; .. !H~B . ~~D STAND. F1g.8 ·
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Assemble the thread stand, and fix it in the table hole. Then tighten lock nut CD to fix the
thread stand, If ceiling wiring can be made, pass the power cable through spool rest rod
®.
. 9.
From the library of: Superior Sewing Machine & Supply LLC

Putting cushion ® into hinge CD, insert hinge CD into the machine head. Then, place the
machine head on the machine base.
004 Fig.4
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1) Removing screw CD, 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 0 so that the belt rotates in arrow ® direction.
3) Reinstall screw
CD and spring ®.
4) Lift tripping lever ® in the direction, pass the belt between latch B ® and latch A® .
. 10.
From the library of: Superior Sewing Machine & Supply LLC

5) Passing belt shifter ® of the speed transmitter, attach the belt onto tension pulley ®.
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. az m .a a{]~ ~'~1/i~P 1116
5. INSTALLATION/REMOVAL _Q.E ,= BELf CQMii, fil Fig.6
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Aligning guide pin ® with hole ® in belt cover CD, 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.
006 Fig.6
. 11·
From the library of: Superior Sewing Machine & Supply LLC

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* Before starting the machine: Fig.7
1) Fill the oil reservoir of the machine base with singer oil type Cup to the level indicated
by"HIGH".
2) Supplement the oil when the oil level has lowered below the bottom line of oil gauge
CD.
3) When the machine has been properly lubricated, the oil is seen to run through the pipe
from oil sight window ®. (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 adjust.ing
screws CD for rough adjustment, and ® 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 ® point when the machine is
newly set up or has been out of use for a long time .
. 12.
From the library of: Superior Sewing Machine & Supply LLC

l:':j fit i~ ~}
ilhitl! High
Mnrhinl' bA~:P.
007 Fig.7
* iM:*ffi E@.~, *tllf.tffltJ1.#J~J!U~tJ1JtHtSinger N-1955
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3)rr~xtt-t~lr 0
008 Fig.8
* Turn off the motor power. Use needle cat. No. 1955-01.
1) Loosening needle setscrew ®, hold needle CD 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.
. 13.
From the library of: Superior Sewing Machine & Supply LLC

009 Fig.9
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1) Lift up and hold bobbin case latch lever CD 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.
0010 Fig.IO
·14.
From the library of: Superior Sewing Machine & Supply LLC

9.••·w. tN . OlNG · T.H .E. :;; a ., e>aetN Fig.ll
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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.
. 15.
From the library of: Superior Sewing Machine & Supply LLC

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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 @, •. passing under the bobbin winder
tension spring.
* Set the bobbin so that it rotates in the arrow direction when the bobbin thread is
pulled.
0012 Fig.12
1~ 00 7?- E8 Jil9iff=~OO ~ o
1)Pass the needle thread in the order as shown in the figures.
·16.
From the library of: Superior Sewing Machine & Supply LLC

0013 Fig.l3
... 1. 2. i ffiliE~~Q~~ ~~ llll4
-12. REDUCTION OF SEWINQ _ ~p~~Q ·~ ~NJL.~!'YU i ~GENCV STOP Fig.l4
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* Reduction of sewing speed
1) Turn hand stop crank CD 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.
. 17.
From the library of: Superior Sewing Machine & Supply LLC