Singer 29K71 Troubleshooting guide

From the library of: Superior Sewing Machine & Supply LLC

1
USE SI GER ** OILS
and LUBRI CAN TS
They insure freedom from lubricating trouble and give
longer life to sewing equipment
The following are the correct lubricants lor this machine:
TYPE B -MANUFACTURING MACHINE OIL, HEAVY GRADE
When an oil is desired which will produce a minimum of
stain on fabrics, even alter a long period of storage, use:
TYPE D -MANUFACTURING MACHINE OIL, HEAVY GRADE
OTI-I£:R 5 I N Ci ER ** L UBR I CANTS
TYPE E - THREAD LUBRICANT
For lubricating the needle thread of sewi ng machines for
stitching fabrics or leather where a thread lubricant is
required.
TYPE F -MOTOR OIL
For oil lubricated motors and plain bearings in power
tables and transmitters.
NOTE: All of the above oils are available in 1 quart,
1 gallon and 5 gallon cans.
GEAR LUBRICANT
This specially prepared grease is recommended for gear
lubrication on manufacturing sewing machines.
BALL BEARING LUBRICANT
This pure grease is specially designed for the lubrication
of ball bearings and ball thrust bearings of motors and
electric transmitters, ball bearing hangers
of power tables,
etc. Furnished in 1
lb. and 4 lb. tins.
From the library of: Superior Sewing Machine & Supply LLC

Form 20870
· -- (957)
SERVICE MANUAL
AND
PARTS LIST
FOR
SINGER**
29K71, 29K72 and 29K73
UNIVERSAL UPPER FEED MACHINES
SINCLE NEEDLE LOCK STITCH
THE SINGER MANUFACTURING COMPANY
Copyright© 1958 by The Singer Manufacturing Company·
**A Trademark of THE SINGER MANUFACTURING COMPANY
Printed in U. ~ .S.A "-- . _
From the library of: Superior Sewing Machine & Supply LLC

FOREWORD
This book contains complete information covering operation, adjustment,
and parts list, for Machines 29K71, 29K72 and 29K73. Descriptions and exploded
views of all parts assemblies on pages 17 to 44 inclusive, will be found helpful
when ordering any part of the machine requiring renewal.
From the library of: Superior Sewing Machine & Supply LLC

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DESCRIPTION
Machines 29K71, 29K72 and 29K73, for stitching boots, shoes, and other tubular work in leather and
fabrics, have the following characteristics:
Single
Needle, Lock Stitch.
Stop Motion
Hand Wheel- releases hand wheel from stitching mechanism for bobbin winding.
Horizontal Oscillating Shuttle.
Eccentric
Adjustment for Shuttle Timing.
Cylinder Bed.
Replaceable Steel Horn.
Universal
Upper Feed for Stitching in any direction without turning the work.
Stitch Length: 7 to 15 to the inch, depending on material being stitched and operations performed.
Presser Foot rise during feeding action : 1I 4 inch -(Maximum clearance: 318 inch).
Double End
Needle Plate - (two sizes of needle holes at each end for various sizes of needles).
Adjustable Thread Take- up Lever.
Two
Speed Machine Pulley.
ACCESSORIES AVAILABLE UPON ORDER
(at additional charge)
Attachment for fitting Hand Wheel on front of machine (Part No. 82121 ).
. . {601405 or 601407 for foot power.
Stand for mountmg the mach me
601406
601408
f 1 .
or ore ectnc power.
Detachable Work Table for flat stitching operations (Part No. 83739, 83740, or 83741).
Electric
Transmitter S-9.
SPECIAL FEATURES
MACHINE 29K71
End of cylinder bed is 1 inch wide and 7/ 8 inch deep.
Space at right of needle 12-1I 4 inches.
Diameters of belt grooves 2-718 inches and 4-7 / 8 inches.
MACHINE 29K72
End of cylinder bed is 1-51 32 inches wide and 1-1 I 16 inches deep.
Space at right of needle 17-1/ 2 inches.
Diameters of belt grooves 3-1 I 4 inches and 5-1 / 2 inches.
Large Bobbin.
MACHINE 29K73
End of cylinder bed is 1 inch wide and 7/ 8 inch deep.
Space at right of needle 17-112 inches.
Diameters of belt grooves 3-1 I4 inches and 5-112 inches.
From the library of: Superior Sewing Machine & Supply LLC

SPEED
The maximum speed recommended for these ma-
chines is 500 stitches per minute, depending on ma-
terial being stitched and operations performed.
For thick work, patching, mending, and stitching
elastics, put the driving belt on the larger pulley of
the machine and the smaller pulley of the stand.
For light work, put the belt on smaller pulley of the
machine and the larger pulley of the stand.
When in operation, the hand wheel must always
turn over toward the operator (counter-clockwise).
NOTE: If fitted on front of machine, hand wheel must
always turn over toward the right (clockwise).
TO OIL MACHINE
I
Fig. 2. Oiling Front Side of Machine
When machine is received from the factory, it should
be thoroughly cleaned and a drop of oil should be
applied to all parts indicated in Figs. 2, 3 and 4.
Apply a drop of oil to the stand at the centers upon
which band wheel and treadle work. Also to both
ends of the pitman rod connecting the treadle with
band wheel.
Run machine for a few minutes to work oil into
bearings. When the machine is in constant use, it
should be oiled daily.
\
Fig. 3. Oiling Rear of Machine
\
I
Use "TYPE B" or "TYPE D" Oil, sold by Singer Sew-
ing Machine Company.
See inside front cover of this book for description of
these oils.
Fig. 4. Oiling ShuHie Race
To oil shuttle race, raise needle bar to its highest
point and lift feeding foot A, Fig. 5 by moving lifter B
upward.
Press down lever C, Fig. 5 and swing needle plate
to position shown in Fig. 4.
Apply a
drop of oil to the face of shuttle race and
to the hole shown by arrow in Fig. 4.
_j
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TO OPERATE THE MACHINE
1. Raise feeding foot A, Fig. S by moving lifter B
upward.
2. Place both feet upon the treadle.
3. Turn top of hand wheel over toward you to
start machine. (If hand wheel is fitted on front of
machine, turn top of hand wheel from left to
right to start machine.)
4. Allow
the feet to move freely with the motion
of the treadle. Continue this motion with an
alternating pressure of heel and toe until a
regular easy movement is acquired and the
hand wheel is kept in continuous rotation by use
of the feet alone.
5. When familiar with the treadle movement, and
you are able to re-start the machine without
turning the hand wheel in the wrong direction,
place a piece of material under the feeding foot.
6. Lower
feeding foot by lowering lifter and oper-
ate machine until you have become accustomed
to guiding the material.
Material is moved along by the feeding foot only,
and, the direction of stitching can be changed as de-
sired, by turning wings, Fig.32. To make a curved line
of stitching, operate machine slowly and, without
turning work, turn the revolving wings enough to pro-
duce the desired curve.
Feeding foot rises between each stitch while needle
is in the material. With needle serving as pivot, ma-
terial can be turned in any direction. When desired,
the feeding foot may be fixed to work in a straight
line, in any direction, by tightening the knurled screw
A, Fig. 22.
Never turn the work or alter the direction of the
feed while the foot is pressing on the material, as this
may cause missed stitches and damage the surface
of the work.
l
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A....U j
Fig. 5. Operating Machine
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NEEDLES
Needles for MACHINES 29K71, 29K72 and 29K73
are of Class and Variety 29 x 3 for cloth and 29 x 4
for
leather. Needles 29 x 3 are made in sizes 11, 14,
16, 17, 18, 19, 21, 22, 23, 24 and 25, Needles 29 x 4
are made in sizes 9, 11, 14, 16, 18, 19, 21, 22, 23,
24 and 25.
The
above needles regularly have nickel finish but
can be supplied with chromium finish if ordered.
The size of the needle to be used should be deter -
mined by the size of the thread which must pass freely
through the eye of the needle. Rough or uneven thread,
or thread which passes with difficulty through the eye
of the needle will interfere with the successful use
of the machine.
Orders for needles must specify the Quantity re-
quired, the Size number, also the Class and Variety
numbers separated by an x.
The following
is an example of an intelligible order:
"1 00 No. 16, 29 x 3 Needles", for cloth.
"1 00 No. 16, 29 x 4 Needles", for leather.
The best stitching results will be obtained by using
the
needles sold by Singer Sewing Machine Company.
THREAD
Left twist thread should be used in the needle.
Either right or left twist thread can be used for the
bobbin.
To determine the twist, hold the thread as shown.
Turn the thread over toward you between the thumb
and forefinger of the right hand; if left twist, the
strands will wind tight er. If right twist, the strands
will unwind .
Fig. 6. Determining Twist of Thread
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TO REMOVE THE BOBBIN
Raise needle bar to its highest point and lift feeding
foot A, Fig. 7 by moving lifter B, Fig. 5 upward.
Press down lever C, Fig. 7 ana swing needle plate
around as shown.
Turn hand wheel until point of shuttle is nearest
operator, then lift out shuttle with thumb and fore -
finger.
Turn shuttle
over and bobbin will drop out.
NOTE: For 29K72 machine, move bobbin retaining
spring D, Fig. 7 outward before taking out the bobbin.
of'
c
J,
Fie. 7. Takine out the Shuttle
TO WIND THE BOBBIN
Disengage hand wheel from operating stitching
mechanism by drawing out plunger F, Fig. 8 and
turning it slightly to left or right.
Place spool
of thread on the spool pin and pass
end of thread through the center slot or hole in the
bobbin. Then press the bobbin, with slot in the side of
the bobbin facing to the left, as far as it will go,
on bobbin winder spindle.
loosen thumb screw D, Fig. 9 on bobbin winder and
push it down until the rubber ring presses against the
rim of the hand wheel, then tighten screw.
Turn hand wheel over toward you as when sewing
and simultaneously guide the thread with the finger
as shown in Fig. 9.
6
if'F
Fig. 8
NOTE: If hand wheel and bobbin winder are fitted
on front of machine, the slot in the side of the bobbin
must face to the outside. The top of hand wheel must
then turn over to the right (clockwise) as when sewing
to insure properly wound bobb ins.
When bobbin is sufficiently full, remove it from the
spindle. loosen thumb screw D, Fig. 9 on t he winder
and move screw upward in slot until the rubber ring
is out of contact with the hand wheel, then tighten
thumb screw.
Fig. 9. Winding the Bobbin
Re-engag e the ha nd wh ee l with the s ti tching me-
chanism by turning plunger F, Fig. 8 slightly while
si multaneously turning t he hand wheel slowly until
the plunger enters the hole in the inner disc.
From the library of: Superior Sewing Machine & Supply LLC

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TO THREAD THE SHUTTLE FOR 29K71 AND 29K73
Fig.10
Turn shuttle over wh ile holding bobbin in it end
drew the thread into the slot in the edge of the shuttle
end under the end of the tension spring . See Fig. 11.
Fig. 12
Hold the bobbin between the thumb end forefinger
of right hond, the slot in the edge of the bobbin being
at the bottom. Allow two or three inches of thread to
hong free .
Hold the shuttle in the left hand with the wide
opening uppermost. Let end of thread pass through
shuttle opening, then place bobbin into shuttle. See
Fig. 10.
Fig. 11
Poss the thread through delivery eye which is in
the upper edge of the shuttle . See Fig. 12.
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TO THREAD SHUTTLE FOR 29K72
Fig. 13
Place bobbin into shuttle and push back the re-
taining spring which will hold the bobbin in the
shuttle.
With
the right hand, draw the thread into the slot
in the edge of the shuttle as far as possible. See Fig. 14.
Fig. 15
Hold the bobbin between thumb and forefinger of
right hand with the thread leading from right to left.
Hold the shuttle in the left hand with its open end
up and its retaining spring moved outward. See
Fig. 13.
Fig. 14
Then draw thread to the left, up, and to the right
under the spring. See Fig. 15.
Now insert
end of thread up through the small hole
in the edge of the shuttle and through the eye in top
of the bobbin position post. See Fig. 16.
Fig. 16
From the library of: Superior Sewing Machine & Supply LLC