Singer 29K71 Troubleshooting guide

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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

3
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.
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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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Fig. 5. Operating Machine
5
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'
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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.
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7
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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8
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
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TO REPLACE THE SHUTTLE
After threading the shuttle, turn hand wheel until
the upright part of the shuttle carrier is to the right.
Then
with the point of th e shuttle nearest you, and
pointing towards the right, place it into the recess
as shown in Fig. 17. With needle bar at its highest
point, press down : ever C, Fig. 17 and swing back
needle plate to its sewing position.
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Fig. 17. Replacing Shuttle
TO SET THE NEEDLE
Raise needle bar to its highest point and loosen
screw H, Fig. 18. Then insert shank of the needle up
into the needle clamp as far as it will go with long
groove of the needle to the left and its eye directly in
line with the arm of the machine . Tighten screw H,
Fig.
18 . loosen screw G, Fig. 18 and move the clamp
to right or left until the needle passes through the
center hole in the needle plate, then tighten screw G.
CAUTION: There are two double end needle plates
furnished with each machine. Be cer tain needle is
straight and corresponds to the correct needle holE!
size indicated on end of needle plate.
Fig . 18. Setting the Needle
9
TO THREAD NEEDLE
Fig. 19. Threading Needle
1. Place the spool of thread on the spool pin so that
thread will draw from the rear side of spool. See
Fig. 19.
2. Raise the wire guide in the oil cup on top of
the arm and pass thread under guide 1, then press
guide back into position.
3.
Draw the thread around back of pin 2 which
is near the tension discs on top of the arm and from
back to front and ri ght to left between the tension
discs 3. See Fig. 20.
4. Pass thread through wire e'yelet 4.
5. lead thread up and from front to back through
the hole 5 in the take - up lever.
6.
Draw about 10 inches of thread through the
hole in take-up lever and insert the end into the slit
in the end of the threading wire supplied with the
machine . Then pass end of threading wire down
through hole 6 which runs through the center of the
needle bar.
7. Remove thread from threading wire then with-
draw threading wire. Pass the thread from left to
right through the eye of the needle 7. Draw about
three inches of thread through the eye of the needle
with which to start sewing .
Fig . 20. Upper Threading
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TO THREAD NEEDLE FOR DARNING
1. Place the spool of thr e ad on the spool pin so
that thread will draw from rear side of spool.
2. Raise the wire guide in the oii cup on top of the
arm and pass thread under guide 1 then press guide
back into position. See Fig. 19.
3. Pass
thread over the pin 2 near the tension
discs in front of the arm and from right to left under
and between the tension discs 3, Fig. 21.
4. Pass thread through wire eyelet 4.
5. Pass thread up and from front to back through
the hole 5 in the take-up lever.
6.
Draw about 10 inches of thread through the
hole in take-up lever and insert the end into the sl it
in the end of the threading wire supplied with the
machine. Then pass end of threading wire down
through hole 6 which runs through the center of the
needle bar.
7. Remove thread from threading wire then with -
draw threading wire. Pass the thread from left to
right through the eye of the needle 7. Draw about
three inches of thread through the eye of the needle
with which to start darning.
4
Fig. 21 . Upper Threading for Darning
TO PREPARE FOR SEWING
With the left hand hold the end of the needle thread,
leaving it slack from the hand to the needle. Turn top
of hand wheel over toward you until the needle moves
down and up again to its highest point, thus catching
10
o~A
Fig. 22. Drawing up Bobbin Thread
the bobbin thread; draw up the needle thread and the
bobbin thread will come up with it through the hole
in the needle plate. See Fig. 22. lay both threads back
under the feeding foot.
NOTE: Turn top of hand wheel over toward the
right (clockwise) if hand wheel is fitted on front of
machine.
TO START SEWING
Place the material under the feeding foot, lower the
foot and start to sew, turning the hand wheel over
toward you. (Turn hand wheel to the right if located
on front of machine.)
CAUTION: Do not try to help feeding of the work
by pulling the material as this may deflect the needle
and cause it to break. The machine feeds the work
easily without any assistance.
TO REMOVE THE WORK
le t the needle bar rest at its highest point, raise the
fee ding foot, then draw the material backward about
3 inch es and cut the threads close to the work. leave
the ends of the threads under the feeding foot.
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TENSIONS
for perfect stitching, the tension on needle and
bobbin threads must be heavy enough to pull threads
to center of material and make a firm stitch, thus :
Fig . 23. Perfect Stitch
If the tension on the needle thread is too tight, or
if that on the bobbin thread is too loose, the needle
thread will lie straight along the upper surface of
the material thus :
Fig. 24. Tight Needle Thread Tension
If the tension on the bobbin thread is too tight, or
if that on the needle thread is too loose, the bobbin
thread will lie straight along the under side of the
material, thus:
Fig. 25. Loose Needle Thread Tension
NEEDLE THREAD TENSION
The tension on the needle thread is regulated by
the thumb nut near the tension discs. See Fig. 26.
To increase the needle thread tension, tighten thumb
nut.
To decrease the needle thread tension, loosen thumb
nut.
NOTE: Tension on needle thread can be tested only
when the feeding foot is down.
Fig.26. Regulati ng Needle Thread Tension
11
BOBBIN THREAD TENSION
The tension on bobbin thread is regulated by the
screw in Figs. 27 and 28 on the end of the shuttle
tension spring.
To increase bobbin thread tension, gradually tighten
screw. See Fig. 27.
To decrease bobbin thread tension, gradually loosen
screw . See Fig. 28.
When bobbin thread tension has been properly
adjusted, it is seldom necessary to change it because
a correct stitch can be usually obtained by varying the
needle thread tension.
Fig. 27. Increasing Bobbin Thread Tension
Fig . 28. Decreasing Bobbin Thread Tension
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TO REGULATE THE TAKE-UP LEVER
WITH REGULATOR INDICATOR
The spring tension on take - up lever J, Fig. 29 is
adjusted by thumb nut K. The tension on this lever
should be about the same as that applied to the upper
thread by the tension discs.
When the stitch is set, at the top of the needle bar
stroke, lever J should be held down far enough by the
tension of the thread so that the take-up action will
keep the thread taut until the needle enters the work.
When sewing light weight materials with fine
thread, more take-up action may be secured by turn-
ing the thumb nut K so that it screws up to decrease
the take - up spring tension. This should be done instead
of tightening the thumb nut of the tension discs.
For
heavier materials and thread, the take - up ten-
sion must be about the same as that applied to the
upper thread by the tension discs.
The travel of take-up lever J is regulated by means
of knurled nut L. The indicator near nut L is marked
with the figures 0 to 4. This indicator provides a useful
guide to the operator in setting the take - up movement
most suitable for the material and thread being used.
For thin materials, such as kid or box calf, turn knurled
nut Luntil the zero mark is opposite the small plunger U.
Other adjustments can be made in steps by turning
the nut to suit any thickness of material and thread
within the capacity of the machine.
NOTE: All machines sent out from the factory are
so adjusted that they will give satisfactory results on
a general range of materials. Before any adjustment
is made to the travel of the take-up lever, the needle
bar should be raised to its highest point.
Fig. 29. Regulating Tensian and Travel of Take-up Lev er
12
ADJUSTMENT OF THREAD TAKE-UP LEVER
REGULATOR INDICATOR
The range of adjustment given by the indicator,
when sent out from the factory, !thould suffice for all
general purposes, but, if desired, the range can be
raised or lowered by means of the adjusting screw
T, Fig. 29 at the extreme right.
To alter the range, loosen the lock nut S and, using
a screwdriver, turn the center screw T to the right to
reduce the travel of the take-up lever.
To increase the travel, turn the screw T to the left.
Wear at the tip of the center screw can also be taken
up in this manner. When the proper adjustment has
been obtained, tighten the lock nut S.
It is most important that the hexagon head nut R
be securely locked against the face of the piston.
TO CHANGE LENGTH OF STITCH
The length of stitch is regulated by the stitch regu-
lator which is held in position by thumb screw
M, Fig. 30 at back of the feeding foot bar. Loosen
thumb screw M and move the regulator up or down
until its top is in line with the mark indicating desired
number of stitches to the inch as shown by the arrow.
Then tighten the thumb screw.
Fig. 30. Changing Stitch Length
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TO REGULATE PRESSURE ON THE MATERIAL
The pressure on the material is regulated by knurled
thumb nut 0, Fig. 31. To increase the pressure, tighten
lhe thumb nut. To reduce the pressure, loosen the
thumb nut.
Heavier pressure is required for leather work than
for sewing cloth or cotton materials. The pressure
should be only heavy enough to enable the feed to
move the work along evenly .
Fig. 31. Regulating Pressure on Material
TO TURN A CORNER
Stop the machine with the needle in the work and
turn top of hand wheel over toward you until the
feeding foot rises. Then turn the work as desired,
using the needle as a pivot.
NOTE: If hand wheel is located on front of machine,
turn top of hand wheel over to the right.
TO REGULATE THE AUTOMATIC LIFT
OF THE FEEDING FOOT
While the machine is in operation, the feeding foot
rises after it has moved the work forward; then the
foot moves toward the needle and descends again
upon the fabric. It is advisable that the lift of the foot
should be only sufficient to clear the thi ckest part of
the work.
To adjust the lift, raise the feed i ng foot by means of
lifter 8,
Fig. 31. To increase the feeding foot lift, l oosen
wing screw N and move the screw toward you . To
reduce the lift, move the screw away from you. When
the desired height of lift is obtained, ti ghten the w ing
screw.
13
TO CHANGE DIRECTION OF THE FEED
While stitching, the work is moved along by the
action of the feeding foot only.
The direction of the stitching can be changed as
desired by turning the foot around by means of the
two handles E, Fig. 32.
~E
Fig. 32 . Changing Feed Direction
TO CHANGE THE NEEDLE PLATE
1. Ra i se the needle bar to its highest position.
2. loosen screw Q, Fig . 33 and, by lifting upward ,
remove needle plate and hinge pin P.
3. When replacing the needle plate, place fl at side
of pin P toward screw Q.
4. Tighten sc ew Q on fl at side of pin P.
fig. 33. Correct Position of Hinge Pin in Needle Pl at e
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14
HINTS FOR PERFECT OPERATION
Oil the machine regularly.
The top of hand wheel must always turn over toward the operator ( counterclockwise) .
If located at side of machine, the hand wheel must turn over from left toward right (clockwise).
Never run the machine without material between the feeding fool and needle plate.
Do not run the machine when both shuttle and needle are threaded unless there is material under the feeding
foot .
The Belt
See that the belt is not too tight; it should be just tight enough not to slip. If too loose, remove the hook at one
end, shorten the belt and rejoin.
Machine Working Heavily
If the machine runs hard after standing idle for some time, use a little kerosene or benzine in the oiling places, run
the machine rapidly, then wipe clean and oil.
To Avoid Breaking Needles
The feeding fool should be securely fastened by the thumb screw. Do not sew heavy seams or very thick
material with too fine a needle. A large needle and thread to correspond should be used on heavy work.
See page 5.
Avoid pulling the material when stitching. Th is may cause the needle to strike on the needle plate and break .
Breaking of Upper Thread
Improper threading of machine.
Tension being too tight.
The
thread being too coarse for the size of the needle.
The needle being bent, having a blunt point, or being set incorrectly.
Breaking of Under Thread
Improper threading of shuttle.
Bobbin Thread tension being too tight.
Skipping of Stitches
The needle may not be accurately set into the needle bar or the needle may be blunt or bent.
Remove the accumulation of dirt or lint which might gather beh i nd thread retaining spring ne ar bottom of needle
bar by working a piece of tape or thread back and forth between spr i ng and needle bar.
CAUTION: Do not bend spring away from needle bar or spring may become permanently damaged.
Examine feeding foot and remove any dirt or lint from the t ee th to insure regular feeding of material.
Working on old, hard leather
When working on old, hard leather, it is advisable to s oft en the le ather with oil, use a coar se needle and mak e
a long stitch to
prevent needle from splitting the leath er.
From the library of: Superior Sewing Machine & Supply LLC

v
TO EXAMINE, REMOVE AND RE-ASSEMBLE THE
PARTS FROM THE RACK BOX
Remove machine from treadle stand or power bench
after taking out the four screws located at the bose of
the machine. The machine should then be tilted bock
upon its machine pulley end, the underside facing the
adjuster. Ports con be examined or removed from the
rock box after taking out the two screws V, Fig. 34
and removing the cover plate. The following ports ore
then exposed as shown in Fig. 35: long rock Y, short
rock X, intermediate pinion Z, shuttle driving pinion
W, needle plate locating pin and spring A2, all of
which can be removed without disconnecting the rack
box from the machine .
To toke out the shuttle carrier, remove the small set
screw in the shuttle driving pinion W by inserting a
small screwdriver through the groove at the side of
the rock box as shown in Fig. 35. The shuttle carrier
con then be pressed through the pinion. To remove the
long rock Y, insert a screwdriver through hole as
shown in Fig. 36 and toke out the screw X2. Before
proceeding to withdraw the rock, remove the pinion
Z, Fig. 35 then grip the rock and draw it straight
toward the pulley end of the machine. The short rock
X
and shuttle driving pinion W can be removed with-
out difficulty. When replacing any one or re-assembling
the whole of these ports, care must be token to see
that the gears and racks are correctly engaged, as
shown in Fig. 36.
fis 34 Rcm ovtn g
C
ov er Plato
A2~
fi9 35 Re movtng Pa th
from Rock Box
15
INSTRUCTIONS FOR REMOVAL OF THE
RACK BOX
If for any reason it is necessary to remove the rock
box from the machine, proceed as follows: Remove the
machine from its treadle stand or power bench. Turn
the hand wheel until the connecting rod hinge screw
X2, Fig. 36 is opposite the hole in the lower arm. Then
tilt the machine back upon its machine pulley end, the
underside facing the adjuster. Insert a screwdriver
through the hole as shown in Fig. 36, and remove the
screw X2. Slightly loosen the two screws 82 by giving
them a half turn with a screwdriver. Then drive out
the toper pin C2, using o 3/ 16" punch and hammer,
and take out the two screws 82 . The machine should
now be replaced on its. feet and the horn will then
come away if pulled in a horizontal direction.
CAUTION: Never raise the front of the horn or the
end of the long rack may be damaged.
When re - assembling the box to the machine, be
sure that the taper pin C2 is driven in as for as it will
go before finally tightening the two screws 82, Fig. 36.
NOTE: Cover plate is shown removed in Fig. 36 to
illustrate how the gears and rocks should be correctly
engaged.
Ge a" an d R ocks
Co rrrc tly E n9a gcd
B2
fi g. Jb . R mo vtng Ro ck Box
C+-C2
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16
TO TIME THE SHUTTLE
Turn hand wheel until eccentric stud is aligned with
screwdriver hole 02, Fig. 37.
Fig. 37. Location of Eccentric Stud for Timing Shuttle
To time the shuttle, turn eccentric stud at hole 02
until the leading edge of the shuttle carrier moves at
each oscillation to a position approximately one-third
the distance across the needle slot below the face
plate as shown in Fig. 38.
1/3
--+~ .-DISTANCE
[;
Fig. 38. Correct Timing of Shuttle Carrier
NOTE: Shuttle is removed in Fig. 38 to illustrate
correct timing of leading edge of shuttle carrier.
From the library of: Superior Sewing Machine & Supply LLC

PARTS LIST
FOR
SINGER ..
29K71, 29K7 2 and 29K73
SINGLE NEEDLE
LOCK STITCH
UNIVERSAL UPPER FEED MACHINES
THE SINGER MANUFACTURING COMPANY
From the library of: Superior Sewing Machine & Supply LLC

From the library of: Superior Sewing Machine & Supply LLC