Singer 6958001 Troubleshooting guide

Service Manual and Parts List
6958001
6958002
6958003
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Each 6958 machine is ide~tified by a ~ariety number on a metal
plate on the machine.
A?PLICATIO~ OF CATALOG
This cataloa applies speci:=ically to the \'arietics o-t" machines
as listed below. Reference to directions, such as riaht, left, front,
back, etc., are given from the operator's position while seated at the
machine. Operating direction of handwheel is away from operator.
VARIETIES OF "-ili,.CHI~SS
High Speed Single Curved ~eedle, Two Looper, Three Thread, Overseaming
i'lachine, with Di f: eren t ia l Feed, Tr immina !\lechani sm v;i th Spr ina Pres sed
Lower Knife and Automatic Lubricating System.
6 9 580 0l Light to medium duty machine for seaming light to medium weight flat,
warp and ribbed knit fabrics of cotton, wool, rayon, silk or similar weight syn-
thetics where long straight seams are a primary requisite. Seam specification
504-SSa-1; standard seam ·widths 3/32, 1/8 and 5/32 inch (2.38, 3.17 and 3.97
mm); stitch range, 8-2 0 per inch; ope rat or adjustable main and differential
feeds. "\Iaximum recommended speed 7 000 R. P.M. - depending on stitch length
and t:y'}Je of operation.
6958002 Light to medium duty machine, with single row main and differential
feeds that are split at the needle, for better control v.:hen sewing curves or
irregular shaped seams on women's lingerie, robes and similar seaming and
trimming operations on light to medium weight flat, warp and ribbed knit fab-
rics of cotton, silk and similar weight synthetics. Seam specification 504-SSa-1;
standard seam widths 3/32, 1/8 and 5/32 inch (2.38, 3.17 and 3.97 mm); stitch
range, 8-2 0 per inch; operator adjustable main and differential feeds. Maxi-
mum recommended speed 7 000 R. P. :vr. - depending on stitch length and type of
operation.
6958003 Same as 6958001 except medium to heavy duty machine for seam-
ing light, medium or heavy v:eight materials. Stitch range, 8-16 per inch.
=v!aximum recommended speed 6500 R. P.M. -depending on stitch length and
type of operation.
OILING
CAUTION! Oil was drained from machine when shipped, so reservoir must be
filled before beginning to operate. Oil capacity of Class 6958 is eight
ounces. nse Sinaer Tvoe C oil or eauivalent.
Machine is filled with oil at spring cap in top cover. Oil level is checked at
sight gauge on front of machine. Red bulb on oil level indicator should show between
gauge lines when machine is stationary.
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OILING (Continued)
Machine is automatically lubricated. No oiling is necessary, other than keeping
main reservoir filled. Check oil daily before the morning start; add oil as required.
The oil drain plug screw is located at back of machine near bottom edge of base.
It is a magnetic screw designed to accumulate possible foreign materials which may
have entered the crank case. It should be removed and cleaned periodically.
NEEDLES
Class 695B machines use a curved blade needle. The standard
recommended needle for machines covered in this catalog is:
Cat. 1431
Light Set Point
(Sizes
7
to
23)
Also
available
are:
Cat.
1433
Light" Ball Point
(Sizes
7
to
21)
Cat.
1434
Medium Ball Point
(Sizes
9 to
18)
Cat.
1436
Heavy Ball Point
(Sizes
8 to
16)
CHANGING NEEDLES
Release pressure on presser foot by turning presser foot release bushing (AG,
Fig. 1) and swing presser arm (U) out of position. Turn handwheel in operating
direction until needle is at its lowest point of travel. Using hexagonal socket wrench
No. 21388 AU, furnished with machine, loosen needle clamp nut about 1I4 turn.
Again turn handwheel until needle is at high position; withdraw needle.
To replace needle, leave needle holder at high position and with the flat to the
left, insert needle in holder until it rests against stop pin. Keeping needle in this
position, turn handwheel until holder is again at its low point of travel; then tighten
nut. Return presser arm (U) to position; relock presser foot release bushing (AG ).
THREAD STAND
After thread comes from cones on cone support (A. Fig. 1 ), it is brought up
through back hole of thread eyelet (B), then down through the front hole of thread
eyelet. Next it is threaded through the upper holes of tension thread guide (C) from
front to back and then through the lower holes from back to front. It should be noted
that the lower looper thread is threaded through the tension thread guide (C), first
through the upper hole back to front, second through the middle hole front to back
and third through the lower hole back to front. All threads then continue between the
tension discs (J), through tension post slot (K) in tension post (G) and on through
front thread guide (::vi).
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[i Tension Thread Guide
~Front Thread Guide
~ lJpper Looper Thread Eyelet
I!JLower Looper Thread Eye
HFrame Looper
Thread Guide
m Presser A:rm
Fig. 1
5
I
Cone Support
_o~jl, ___ ~\_--l====
Top Cover
_..._,.Needle Thread Eyelet
Upper Looper
Thread Tube Assembly
Needle
~Upper Looper
m Lower Looper
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THREADING
Only parts involved in threading are shown in threading diagram (Fig. 1). Parts
are placed in their relative positions for clarity.
It will simplify threading this machine to follow recommended sequence of
threading lower looper first, upper looper second and needle third.
Before beginning to thread, swing cloth plate open, turn handwheel in operating
direction until needle (X) is at high position, release pressure on presser foot by
turning presser foot release bushing (AG) and swing presser arm (U) out of position.
Be sure threads, as they come from the tension thread guide (C) are between
tension discs (J) and in diagonal slots (K) in tension posts (G).
TO THREAD LOWER LOOPER
Thread lower looper thread through right eyelet of front thread guide (l\1). Then
double end of thread and lead it through both eyes of lower looper thread eyelet (R,
Fig. 1) from right to left. Note: thread must pass in front of looper thread pull-off
(AF). Lead thread behind fabric guard (S) and through eyelet hole of frame looper
thread guide (T). Turn handwheel in operating direction until heel of lower looper
(V) is all the way to the left; then thread through both eyes from left to right. Left
eye of lower looper can be threaded easily if tweezers are in left hand.
TO THREAD UPPER LOOPER
Thread upper looper thread through left eyelet of front thread guide (M). Then
turn handwheel until point of upper looper (W) is all the way left. Lead thread
through auxiliary looper thread eyelet (P) from back to front, then through both
eyes of upper looper thread eyelet (N) from left to right. Note: thread must pass in
front of looper thread pull-off (AF). After pulling up upper looper thread tube
assembly (AA), lead thread under neck of top cover casting and down through thread
tube assembly (AA). Pull thread out bottom of tube; push tube down, then insert
thread through upper looper eye from front to back.
CAUTION! Be sure upper looper thread is under lower looper thread when
passing from tube assembly to upper looper eye.
TO THREAD THE NEEDLE
Thread needle thread through middle eyelet of front thread guide (l\!I). Then turn
handwheel in operating direction until needle (X, Fig. 1) is at its highest position.
Insert needle thread from right to left, through both eyes of needle thread eyelet
(AD), und2r neck of top cover casting; then down through hole in top cover needle
thread eyelet (AC). Thread needle from front.
THREAD TENSION
The amount of tension on needle and looper threads is regulated by the tension
nuts (D, Fig. 1). Tension on threads should be only enough to secure proper stitch
formation.
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PRESSER FOOT PRESSURE
Sufficient presser foot pressure to feed work uni-
formly should be maintained. Should it be necessary to
increase or decrease amount of pressure on presser
foot, loosen lock nut (A, Fig. 2) and turn adjusting screw
(B). Adjusting screw has a right hand thread so tighten-
ing increases pressure, loosening decreases pressure.
When pressure adjusting screw (B) has been properly
set, tighten lock nut (A). With presser foot resting on
throat plate, position lockin~ nut (C) so that its under
surface is approximately 1j32 inch to 1/16 inch from
the top surface of adjusting screw (B). Set cap (D)
against locking nut (C).
Fig. 2
ASSEMBLING AND ADJUSTING SEWING PARTS
Before assembling and adjusting sewing parts, remove cloth plate, fabric guard,
chip guard, upper knife assembly, lower knife holder assembly, then follow this
suggested sequence:
SETTING THE NEEDLE
Fig. 3
With throat plate assembled in position,
needle should center in the front end of needle
slot. When needle is at high position, needle
point should be set 1/2 inch above throat plate
(A, Fig. 3). To align needle or set the height
above the throat plate, move needle driving
arm (B, Fig. 3) by loosening clamp screw (C).
Remove throat plate.
If needle thread cam pull-off (A, Fig. 4)
overlaps looper thread pull-off (B), separate by
moving looper thread pull-off back. When re-
tightening looper pull-off screw, be sure to take
up end play in needle driving arm.
At this point, insert lower looper (A, Fig. 5)
into bar (B). With lower looper at left end of its
stroke, set looper point 1/8 inch from center of
needle (Fig. 5), using loopergaugeNo. 21225-1/8.
Do not have lower looper deflecting needle. Tighten
nut (C).
Now assemble differential (front) feed dog.
SETTING THE REAR NEEDLE GUARD
Fig. 4
Set rear needle guard (A, Fig. 6) as high as possible, without interfering with
either lower looper or movement of lower knife holder, but still in position to deflect
needle forward . 002-. 004 inch. Screw (B) is used to set rear needle guard. Make
sure there is no interference between rear needle guard and lower looper.
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SETTING THE LOWER LOOPER
Now finish lower looper adjustment. As
lower looper moves to the right, its point should
be set into the needle scarf (A, Fig. 7) until the
needle springs forward from rear guard surface
another . 00 2-. 004 inch.
SETTING THE FRONT NEEDLE GUARD
Assemble front needle guard (C, Fig. 6).
When lower looper is springing needle off back-
Fig. 5 guard, set front needle guard as close as possi-
ble to needle without touching. Screw (D) is used
to adjust and set front needle guard. After this setting make sure there is no inter-
ference between needle guards and differential feed
dog.
SETTING THE UPPER LOOPER
Insert upper looper (A, Fig. 8) in its holder.
Screw (B, Fig. 8) holds upper looper in its holder
and permits it to be pushed in or out or turned
around its shank. Insert upper looper holder into
upper looper shaft, if it is not already in place.
Screw (C, Fig. 8) on clamp holds the upper looper
holder in the shaft. Locate upper looper in its holder
so that the shank extends 1 I 32 to 1I 16 inch beyond
holder (Fig. 8), for 6958001 and 002, l/16 to
3/32 inch for 6958003.
When the upper looper is at the right end of its
stroke, upper looper holder should be set to position
upper looper shank back of vertical on 6958001 and
002 (Fiq. 8).
NOTE: On 695B003, upper looper holder should
be set to position the upper looper shank about verti-
cally. Be sure on all styles, there is a clearance
between heel of looper and casting. By adjusting
looper holder in or out of upper looper shaft and by Fig. 6
turning the looper around its shank, set upper looper
Fig. 7
point to cross lower looper to the left of the 10\ver looper eye
with. 002 to . 004 inch clearance (Fig. 9).
As the upper looper moves toward the top of its stroke,
the heel of the up~e~ loo~er should pass behind the lower
looper head with 1164 to 1j32 inch clearance.
Next, turn handwheel until looper is at the left end of its
travel; check dimensions of upper looper point \Vith respect to
needle and throat plate (Fig. 1 0). If resetting is necessary, do
it by moving the upper looper holder (A, Fig. 10 ). Figure 1 0
represents the dimensional setting for 6 9 58 0 01 and o0 2.
For 6958003, the settings are 9/64 and 35164 inch. For
example, dimension 31/64 inch is increased by turning
upper looper holder counterclockwise lookina from
left end of machine; dimension 5/32 inch is increased
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SETTING THE C?PER LOOPER (Continued)
by pulling upper looper holder left, out o: upper looper shaft. After
these changes are made, it may be necessary to turn upper looper around
its shank slightly to maintain the condition shown in Fig. 9.
v.-hen the correct setting is obtained, it can be checked
quickly 2s fo~lov:s: As upper looper is moving to the right,
when upper looper eye centers on the needle, bottom of the
needle eye should be about level with top surface of upper
looper (Fig. 11) for 695B00l and 002. For 695B003,
the eyes of the upper looper and needle should
align exactly.
Check setting to avoid interference between upper loop-
er and needle on needle downstroke. If needle rubs the back
of upper looper, pull looper out of its holder slightly and
rotate looper a short distance counterclockwise, looking
from left end of machine. Reset to maintain dimensions of
Figs. 9, 10, 11.
SETTING THE FEED DOGS
Fig. 8
Set all three feed dogs (A, B, C, Fig. 12) so the top
surfaces of teeth all lay in the same plane. This can be
checked by sighting across teeth with a straight edge. Now
assemble throat plate. Feed dogs should now be leveled
with throat plate surface by rotating feed tilting adjusting
pin (D). This pin raises or lowers the back end of both
feed bars at the same time.
The feed dogs should be set level at the time teeth
first appear above the throat plate. Screw (E) locks feed
tilting adjusting pin in place. Before tightening screw (E),
press tilting adjusting pin (D) to the right to thrust against
feed bar thrust washer (F). Now set feed dogs so that teeth
rise about 3/64 inch above throat plate.
Fig. 9 Main feed drive eccentric ferrule (G, Fig. 12) adjusts
the position of main and chaining feed dogs from front to
rear by turning the eccentric to maintain the proper clear-
ance between the main and differential feed dogs and the rear of the throat plate slot.
Lock nut (H) to 19-20 inch lbs. when setting is made.
SETTING THE LOWER KNIFE
Replace lower knife holder assembly. Lower knife (A,
Fig. 13) should be set with cutting edge flush with throat
plate surface. Adjustments are made with hexagonal head
screw which holds lower knife. Lower knife is spring
pressed against upper knife, so no lateral adjustment is
necessary when width of trim is changed.
Lower knife may be secured in any position by tighten-
ing screw (B) and locking nut (C) against support bracket.
Because screw (B) also serves as latch pin for the cloth
plate latch spring, it should always be locked with nut (C)
even when screw is not tightened against lower knife holder.
9
Fig. 10
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SETTING THE UPPER KNIFE
Replace upper knife assembly. Clamp upper knife (D, Fig.
13) in position, setting nut (E) to hold clamp (F) in its most
clockwise position against upper knife. At bottom of its stroke,
front cutting edge of upper knife should extend not 1E:3 s than 1/64
inch below cutting edge of lower
knife. The chain guard (G)
should be set down against the
upper knife and slightly back
from the cutting edge.
After upper knife has been
set for proper width of trim,
Fig. 11 screw (H) should be tightened
to lock upper knife holding
block (J) in place. This will simplify resetting when
upper knife is replaced.
SETTING THE STITCH LENGTH
The main and differential feed controls are in-
dependent of each other.
The right knurled knob marked "l\IAIN" is for
adjusting the main stitch length.
The left hand knurled knob marked "DIFF" is
for adjusting the differential stitch length.
The forward letter marking "L" indicates the
longest stitch length, while the most rearward letter
marking "S" indicates the shortest stitch length.
Therefore, moving the indicator pointers of the main
and differential controls rearward shortens the
stitch length. To obtain the proper stitch length, Fig. 12
set the main and differential feed dogs to have the same feed travel. AdJust accord-
ingly until the desired stitch length is obtained.
NOTE: See Page 19 for "STITCH LENGTH TABLE''.
Fig. 13
After stitch length is set and reverse differential
feed is desired, turn the differential knob to a shorter
stitch length until the desired s earn is obtained. If
differential feed is desired, turn the differential knob
to a longer stitch length until the desired seam is ob-
tained. As a precaution, after setting the- stitch length,
check the travel of the feed dogs to make sure that there
is clearance between the throat plate slots and the main
and differential feed dogs.
Locking Main and Differential Feed Travel Controls
1. Differential feed is locked by moving differential
feed lever lock to differential indicator lever after
proper stitch length is obtained and also by locking
indicator lever nut.
2. Main feed stitch length mechanism is locked by
turning down nylok screw located behind the throat
plate support block in the casting.
10
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Fig. 14
SETTING THE PRESSER FOOT
Assemble the presser foot to presser
arm. With needle in high position, swing
presser arm into sewing position and set the
presser foot to align needle holes (front and
back) and flat on throat plate. The front edge
of needle hole in presser foot must be aligned
with front edge ofneedle hole in throat plate.
It is also important that the bottom of the
presser foot be flat on the throat plate. If
necessary, presser foot can be realigned with
throat plate slots by shifting the foot lifter
lever shaft (H, Fig. 14). To move the shaft,
loosen collar screws (B, Fig. 14) and clamp
screw (G) and then shift the foot lifter lever
shaft to the left or right as required. Re-
tighten collar screws and clamp screw.
The foot lifter lever arm (A, Fig. 14) and the collar (B) secure the shaft. Be
sure the presser arm does not bind and rise when presser foot release bushing is
unlocked.
Adjust lifter lever stop screw (C) so that presser foot can be raised no higher
than upper looper will permit; then lock the nut (D). There should be from 1I 16 to
1I8 inch free motion of foot lifter lever before the presser foot begins to rise. This
adjustment should be made with screw (E) and locked with nut (F). Re-assemble the
chip guard, fabric guard and cloth plate. To assemble chip guard, turn handwheel
until upper knife assembly reaches its highest position.
STARTING TO OPERATE
Be sure machine is threaded according to threading diagram (Fig. 1). With
thread tensions light, set looper thread eyelets (N and R) about horizontal and in the
middle of their front to back locations. Operate machine slowly, without presser
foot in place, to make sure that chain forms and moves off the tongue freely. Swing
presser foot into position, insert material and sew slowly.
NEEDLE THREAD CONTROL
While sewing on material, check needle thread control as follows: Usually all
needle thread is drawn on needle downstroke. At top of needle stroke, thread should
be just tight enough to feed chain off stitch tongue. Stitch tends to pull down slightly
if excessive thread is pulled on the upstroke. With needle at bottom of stroke, posi-
tion needle thread eyelet (AD, Fig. 1) so that needle thread cam pull-off (AE) just
contacts needle thread.
It is desirable to adjust the needle thread pull-off eyelet well-forward (toward
the operator) to delay, slightly, the tightening of the needle thread.
11
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LOWER LOOPER THREAD CONTROL
With material under presser foot, set lower looper thread eyelet (R, Fig. 1)
back far enough so thread is a little slack when looper thread pull-off (AF) reaches
its most rearward position. Looper thread pull-off (AF) is set about 1/8 inch dis-
tance behind needle thread cam pull-off (AE). Frame looper thread guide (T) should
be set with its eyelet approximately 1/8 inch to the right of lower looper (V) heel
eyelet at the time lower looper is at extreme left end of its travel.
While sewing on material, check drawing off of looper thread as follows: A
portion of lower looper thread should be drawn through the tension before lower
looper thread comes off upper looper. To increase amount of thread drawn through
the tension while lower looper thread is on upper looper. move lower looper thread
eyelet (R) down. keeping the same amount of pull-off action.
UPPER LOOPER THREAD CONTROL
Before proceeding to adjust upper looper thread eyelet (N. Fig. 1) balance all
three tensions to give a normal appearing stitch. Moderate change in these tensions
will not markedly affect the purl.
During needle downstroke, forward stroke of looper thread pull-off (AF) will
draw upper looper thread through the tension. When normal amount of looper thread
is drawn, upper looper thread will have almost all slack taken up as looper thread
pull- off reaches its most rearward position.
POSITIONING THE PURL
To move the purl more under the edge. both looper thread eyelets (N and R,
Fig. 1) should be raised keeping the same amount of pull-off. Usually it is better
to have slightly more pull-off on upper thread than on lower thread.
If it becomes necessary to move looper thread pull-off (AF), be sure to take up
all end play in needle drive shaft before tightening. If upper looper is located so
that it is higher over throat plate than recommended in Fig. 10, the purl will tend
to form near top edge. If upper looper is too low. the purl will form nearer bottom
edge.
THREAD TENSIONS
The needle thread tension required is a function of needle thread and material
being sewn. In general, lower looper thread tension should be set as high as possible
without causing needle thread to be pulled down. Upper looper thread tension should
be increased as long as the elasticity of the chain increases or until the purl is pulled
too far over the top.
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w
Fig. 15
TO REMOVE CRANKSHAFT
Crankshaft can be withdrawn easier if these steps are followed:
1. Drain oil by removing plug screw located on back of machine near bottom edge
of base.
2. Remove top and bottom covers of machine.
3. Remove feed eccentric nut (A, Fig. 15) and remove the eccentric (B).
4. Remove key (C).
5. Remove three counterweights (D). Identify these counterweights so that they
will be re-assembled in the proper places.
6. Unscrew oil tube (E) which holds crankshaft split bearing and oil pump. This
tube is reached through bottom of bed casting.
13
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TO REMOVE CRANKSHAFT (Continued)
7. Remove caps of bearings on
crankshaft at points F, G and
H. When re-assembling bear-
ing caps make sure they are in
their original position. Marks
are stamped on both halves
of the caps and both marks
should be on the same side
of the bearings. Also,
screws should be reassembl-
ed in the same holes from
which they were removed.
8. Loosen clamp nut (A, Fig. 16)
B
which holds upper knife driv- E __ __..w/
ing arm (B). Access to clamp
nut is through top cover. Draw
driving arm to the left until
upper knife driving lever (C) Fig. 16
and connecting rod (D) drop,
allowing removal of bearing
cap (E). This is at bearing point (J, Fig. 15) on crankshaft. Observe same
precautions when re-assembling cap as described in 7 above.
9. Remove screw (K, Fig. 15) which holds inner right crankshaft bearing. This
screw is reached through bottom of bed casting.
10. Loosen two screws (L) in fan collar; remove both halves of cooling fan.
11. Remove screw ( M); take off pulley cap (N).
12. Loosen two screws (P); remove pulley (R).
13. Remove three screws (S); take off bearing retaining plate (T}; also, spacer
collar (U) may be removed at this time.
14. Crankshaft may now be removed.
15. If necessary to replace ball bearing (V), it should be pressed off shaft on an
arbor press. In replacing bearing it must be pressed on carefully until it seats
against ground thrust washer (W).
16. Carefully observing reverse of the foregoing operations should simplify re-
assembly of crankshaft. Checking exploded view drawings for location of
various parts and constant testing for binds during re-assembly will also prove
helpful.
17. Before re-assembling, thoroughly clean and dry top and bottom covers and
gaskets. Before re-assembling bottom cover make sure that spring pressed
oil wick which lubricates left crankshaft bearing is inserted in hole in casting
and that it contacts shaft. The wick stands vertically on its spring against
bottom cover. Coat oil drain plug with a sealing compound before re-assembl-
ing to prevent oil leakage. No. 1 Crane Lead Seal is recommended.
14
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15
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ADJUSTI~G INSTRC:?IONS FOR FEE= DRIVE MECHANISM
1. Assemble parts as illustrated to feed control shaft (A, Fig. 17) and feed rock
shaft (B); including feed bars.
2. Thrust feed bars (C and D) against differential thrust guide on bed. Thrust left
side of main feed bar (C) with left feed bar thrust guide (E). Align and thrust
rear of feed bars with tilt adJUSting pin and washer (F) and guide pin (G).
3. Thrust the feed control shaft (A) assuring that washer (H) is against retaining
ring (J) and flush against the recess in the bed casting. Collar (K) should be
thrusted against the bed casting and tightened securely.
4. l\Iain feed control link (L) and main feed drive lever (l\1) must be in alignment
with main feed rocker lever (N) to avoid binding and secured in position bv
collars (P and Q).
5. Feed rock shaft (B) should be positioned with the opening of the retaining ring
(R) upwards and thrusted against the main feed rocker lever (N). Secure shaft
(B) in this position by thrusting collars (S) against thrust washers (T) against
the bed casting.
6. Differential feed control link (l!) and differential feed control lever (V) must be
in alignment with differential feed rocker Lever (W) to avoid binding. Also the
differential feed rocker lever (W) must thrust against the main feed rocker
lever (::\). Lever (V) and rocker Lever (W) can be positioned as required and
secured in place by their clamp screws.
1. A bind could occur in the main feed drive lever(\!), differentiaL feed control
le\'er (V) and differential feed indicator levee (X) if the indicator plate (Y) is
not properly aligned. Oversize holes are provided in plate (Y) for its mount-
ing screws ( Z) to allow repositioning to eliminate bind.
DIFFEREYfL\L FEED CO:"JTROL ADJCSTME~T
a. l\Iove differential rocker lever block (iL~) to lowest position in differential feed
rocker lever (W).
b. Rotate differential feed indicator lever (X) counterclockwise until the pointer
is at the rear end of the scale.
c. Clamp the indicator lever (X) with screw (A B).
DIFFERE:"JTIAL FEED DRIVE SEG:\IE:"JT AD.JT]ST~IE:'-JT
a. :\love differential rocker lever block C~A) to top position by rotating lever (X)
clockwise.
b. Turn the handw;leeL until the feed bar is in its most rear position.
c. Loosen feed rocker lever clamp screw C:...C).
d. Operate differential feed indicator le\"ET (X) and tighten rocker lever clamp
screw (AC) when the differential feed bar (D) shows no movement. l\Take sure
differential feed rocker lever (W) thr~Jsts against the main feed rocker levPr
(::'~).
DIF FERE:'JTLt\L FEED DRIVE LEVER
a. Standard location of the drive pin (AD) is to be in the upper hole of differential
feed drive lever (AE). For longer differential feed travel, such as for gathering,
move pin (AD) to lower hole of le<v-er (AE).
16
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ILLCSTRJ"'\TIO:JS
This catalog is arranged to simplify orderina re~lacement parts.
ExGloded views of various sections of the mechanisn are shown on the
left hand pages so that parts may be seen in their actual positions
in the machine. On the right hand pages opposite the illustrations,
the oarts are listed with descriotions and the quantity of parts re-
quired in the particular view being shown.
:Jumbers in the first column are reference numbers only, indicating
position of a part in the illustration. Do not use the reference num-
bers ln ordering.
In the second colu~n ln the examples below are t~e part numbers
as listed in this catalog. In the third column is the coded number
to be ordered. The prefix "910" must be used. Additionally, letter
suffixes generally are transposed as a prefix to the part number.
Components of sub-assemblies which can be furnished as replace-
ments are indented under the descriotion of the main sub-assembly.
The examples beJow show how to order using parts on Paqe 29
of this catalog to illustrate the instructions above:
Part
Order
Ref.
~0.
~0.
As
Description
Qty.
19
29126
OF
910-DF
29126
Lower
Looper
Bar
Dri\·ing
Lever
and
Connect inc
Rod .='ls sembl y
---
l
20
39544 N
910-:J
39544
Lower
Looper
Connecting
Rod
--
l
2J
22729
E
910-E
22729
Screw,
for
connect ina rod- 2
22
22729
D
910-D
22729
Screw, for
connecting
rod- 2
39544
s
910-S
39544
Ball LToint Guide
?ark
--------
1
97
910-97
Screw, for
ball
JOint
guide
fork
-----------------------
2
39544
u
910-U
39544 Lower Looper
Bar
Driving
Lever
----------------------
l
In the example above, the connecting rod bearing is not listed.
Re~Jlacement of this indi\·idual part lS not recommended. The complete
sub-assembly should be ordered.
\~here the parts for all machine varieties covered in this catalog
are not the same, the difference will be shown in the illustrations
or mentioned in the descriptions. When a part is used in all machines
in this catalog, the variety number is not mentioned.
A numerical list of all parts shown in this catalog appears on
Pages 38 and 39 to facilitate locating the illustration and descrip-
tion when the part number is known.
17
From the library of: Superior Sewing Machine & Supply LLC

IDE:"JTIFYING PARTS
Where the construction permits, each part is stamped with its part number.
On some of the smaller parts, and on those where construction does not permit, an
identification letter is stamped in to distinguish the part from similar ones.
PART NUMBERS REPRESENT THE SAME PART, REGARDLESS OF CATALOC IN
WHICH THEY APPEAR.
TORQUE REQUIREMENTS
Torque (measured in inch-pounds) is a rotatingforce (in pounds)applied through
a distance by a lever (in inches or feet). This is accomplished by a wrench, screw
driver, etc. Many of these devices are available, which when set at the proper amount
of torque will tighten the part to the correct amount and no tighter.
Allstraps andeccentricsshouldbe tightened to19-21 inch-pounds(22-24 em/kg)
unless otherwise noted. All other nuts, bolts, screws, etc .• should be tightened
by hand as tightly as possible, unless otherwise noted.
The screws requiring a specific torque, will be indicated on the picture plates.
18
From the library of: Superior Sewing Machine & Supply LLC

STITCH LENGTH -=-ABLES - 695::-c JOl, 002 , 003
VARIETY
6958001
and
002
6958003
Indicator
Diff.
Feed
\1ain Feed Diff.
Feed
Main Feed
Plate
Stitch Length
Stitch Length
Stitch Length
Stitch Length
-:\1arkings
(Left Pointer)
(Right Pointer)
(Left Pointer)
(Right Pointer)
s
Short
:20
21
11 18 -
A
16
11 14 14
B 13 14
11
12
..
..
c 10 12 9 11
'-
D 0 10 7 10
~·
E 8 9 6 9
L
Long 7 8
5.5
8
::\'OTE: The above chart indicates approximately the number of stitches obtained
on the main and differential feed dogs, when set at the different markings
on the indicator plates.
For Example:
To get both ::\LA.I::"J and DIFFERE::\TLti,.L feed t ra vcls at 10 S. P. I., set the LEFT
pointer (DIFFERE:r\TIAL) at "C" and RIGHT pointer (I\lAIN) at "D" respectively.
This will give the equivalent of a # 10 cam on I\1AE\ and # 10 cam on DIFFERENTIAL.
To get DIFFEREI'\TIAL (GATHERING) action equivalent to say a# 9 cam on DIFFER-
E::\TLti,.L and a # 10 on :I\TAIN, move the LEFT pointer (DIFFERENTLti,.L) to "D".
To get REVERSE DIFFERENTLA.L (STRETCH) action equivalent to say a # 12 cam
on DIFFERENTIAL and a# 10 on MAIN, move the LEFT pointer (DIFFERENTIAL)
to "B''.
19
From the library of: Superior Sewing Machine & Supply LLC

20
From the library of: Superior Sewing Machine & Supply LLC

P1PORTA-:JT:
B~:CmE ORDERI:1G .::..:~y PJI.RTS BEL:::~·:, REFER TO T!-:~ DETAILED
I\STRUCTIO-:JS 0\ ?~GE 17
Ref.
Xo.
1
2
3
4
5
6
7
8
9
10
11
12
13
13A
14
15
16
17
18
19
20
21
22
23
24
25
26
')-
~I
28
29
30
31
32
33
34
35
36
37
38
39
-±0
41
-±2
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
:\!AI:\"
FRA:\IE, :\IISCELL.'..: :r:ocs CO\.ERS, p:__:.. TES A.r--.."TI OILI""JG PARTS
Part
Xo.
22569
39582
BD
39582
B'C
22569
J
5363-± c
22569 c
39535
p
39582
BF
22824
22:0,69 D
395 63 H
661
D-8
22565
22565
s
22511
E
22569
K
225 69 D
39518 T
29477
cv,:
39568
G
39568
J
227-±3
39594 s
39594 T
39535
:\1
22569
B
666-268
39593 K
666-271
660-506
56393 G
56393 \'
666-280
39593
L
22569 D
39593 J
660-2-±3
39593 H
39S82
F
22653
D-4
39582 AY
39595
22586
R
39593 D
39593 c
22569
74
E
22806 A
22572 A
39582 AZ
39582
BA
39582 XE
39501
DL
39532 A
90
39501
K
138
39578 F
22657 D-12
Amt.
Description Req.
Screw, for cloth plate stud-------------------------------- 1
Gasket, for rear co\·er ----------------------------------- 1
Rear Cover --------------------------------------------- 1
Screw. for rear con"r------------------------------------ 4
\\asher, for main feed bar >:hrust guide-------------------- 2
Screw, for main feed bar thrust £Uide---------------------- 2
~•iam Feed Beer Thrus: Guide ___ .:-__________________________ 1
Oil Shield, lov:cr ---------------------------------------- 1
Screw, for lower oil shield ------------------------------- 2
Scrcv:, fcor •week tl:1rc~u:1 P'lll-off eyelet-------------------- 1
.'\eedle Thread P•o~ll-off Eyelet----------------------------- 1
Dowel Pin ---------------------------------------------- 2
Set Screw, for upper looper thread tube assembly and upper
looper dri\·e le\·er shaft--------------------------------- 2
Spot Sere\\·, for upper looper dri\·e le\•er shaft-------------- 1
Oil Drain I'lug------------------------------------------- 1
Screw, for oil s1ght gauge -------------------------------- 1
Screw, for chip guard------------------------------------ 2
Chic Guard---------------------------------------------- 1
'Cpper Looper Thread Tube Assembly---------------------- 1
Thread Tube ---------------------------------------- 1
Thread Tube Tension Spring-------------------------- 1
Screw, for thread tube tension spring------------------ 1
Oil Fllter Screen ---------------------------------------- 1
Oil Filter Pad------------------------------------------- 1
Guide, for differcraial feed bar---------------------------- 2
Screw, for d1fferential feed bar guide---------------------- 2
Felt Pad------------------------------------------------ 1
Oil 1--..;.bL", ~ygu~:-.0.:-,c --------------------------------------
Oil Tube, brass -----------------------------------------
Retaining Ring, :or oil tube-------------------------------
Porex Filter, for oil tube---------------------------------
Spring, for oil t'Jbe --------------------------------------
Oil T'--lbe, tygotha.nc --------------------------------------
Spring, for oil rube--------------------------------------
Sere\';, for oil t-_;bc spnng --------------------------------
Oil Pump Tube------------------------------------------
Oil Seal HlDg, for oil sight gauge--------------------------
Oil Sight Gauge------------------------------------------
Base Plate Exte~sion-------------------------------------
1
1
1
1
1
1
1
1
1
1
1
1
Scrl'w, for base plate extension --------------------------- 2
Casket, for bottorr. co\·er --------------------------------- 1
Isolator------------------------------------------------- 4
Sere\\·, for bottorr: co\·er---------------------------------- 1
Oil Gauge Indicator-------------------------------------- 1
Oil Gauge Float------------------------------------------ 1
Screw, for bottom cover---------------------------------- 11
Plug Screw, for machine bed------------------------------ 1
Screw, for bottom cover plate----------------------------- 1
Screw, for bottorr. co\·er plate-----------------------------
Bottom Cover Plate--------------------------------------
Gasket, for bottom cover plate----------------------------
5
:l
1
1
1
1
2
1
2
1
1
Bottom Cover -------------------------------------------
Cloth Plate----------------------------------------------
Latch Plate Latch Spring ---------------------------------
Screw, for latch plate latch spring-------------------------
Cloth Plate Stud -----------------------------------------
Screw, for cloth plate fabric guard ------------------------
Cloth Plate Fabric Guard---------------------------------
Screw, for cloth plate------------------------------------
21
From the library of: Superior Sewing Machine & Supply LLC