UnionSpecial P300-0 Series User manual

FINEST QUA LITY
S TYLES
P300- 0/1 94
P300-0/ 201
P300-0/401
CATALOG
NO.
P21323
Form P21323
Rev. (566)
CLASS P300-0
"'
INDUSTRIAL
SEWING
MACHINES
SINGLE & MULTIPLE NEEDLE, NEEDLE FEED
DOUBLE LOCKED STITCH MACHINES FOR
GENERAL STITCHING OPERATIONS ON MEDIUM
TO HEAVY WEIGHT MATERIALS
UNION SPECIAL CORPORATION
CHICAGO
From the library of: Superior Sewing Machine & Supply LLC

CONTENTS
DESC~ I PTION. ............••.••...•.•........ 3
INSTALLATION ..•••......••••...•..•...•.... 4
LUBRICATION ......•.....••••............. •. 5
Description of Machine ......••.....•..•...•.... 3
Genera I Charocteri sties ..•.•.......•..••..•.. 3
Special Features •.•...••••••..•......•..... 3
Feed Bar, Height .....•..•.•••••..•.••..•..... 12
Feed Dog, Centralizing .....•••....•.....••..•. 12
Height ....•.......••....•••.......•....•• 12
Lengthwise Setting ........................ 12
Sidewise Setting ..•..•...•••.•........•... 12
Timing .••.•.•.. . ...•..•••••..•..••....•. . 13
Feed Roll, Pressure ........................... 9
Installation ..•.......•..•••••••.•..•...•..... 4
Loop
Deflector ••.••.••..•.••.••..•.........•• 13
Looper, Positioning •.•..••.••.•.•..•..•.....• • 14
Lengthwise Setting .....•.••.•..•.....•.•.. .14
Sidewise Setting •..•..•.••••.•........•.... 14
Timing •.•.•.•..•..•.•.•••••..........•.•• 15
Lubrication ....•..•.••.••.•.••••..•..•........ 5
Arm Shaft .••..••..•..•..•••••..•.•...•.••.. 5
Bed
Shaft ...•..•.•..•.•.•••......•.......•. 5
Other Points •..........•••.•.•..••••....... 5
OPERATOR INFORMATION .................. S-8
ADJUSTMENTS ............................ 8-17
IHDEX
Needles •.•....••..•.........•.••.••.....•••.. 6
Setting
•...•.••.••..•..•........••••..•••.. 6
Needle Bar, Height
•.•.••..•..•....•...••..•••• 14
Needle Bar, Position ••.•.•...•....••.•...••••• 13
Needle Guard, .•......•...••...•••.•..•..•••.. 15
Presser Bar, Height •..••••.....•..•....•..•••• 11
Presser Foot, Pressure ...................... 8, 9
Speed •.•.•..••.•.....•.•.•••.•.•••...•••.••.. 5
Stitch Length .•.••..•..•.•..••.•..••.•••.•••. .10
Spreader, Positioni ng ••.•.•.....•••.•..•••••••• 16
Lengthwise Setting •.......•..•..•.•••..••• 16
Sidewise and Height Setting
..•...•......•••• 16
Toke-up, Adjustment .•..•..•.........••.•..••• 17
Looper Thread .••.•..••.•.•.•••.•••.•.•••• 17
Needle Thread .•..••••....•.••.•...••..••• 17
Tension .•..•.••.••....•..•....••.••.••.•.••.• 8
Releaser
...•.•..••.•.••..•.•..••..•.••.•• 17
Threading .•..•......••.•..•..••..••..••..•••• 7
Upper
.•.....••.•.....•.....•.•..••.••.•••• 7
Lower
••••.•••....••.••..••••••.••••...••• 7
From the library of: Superior Sewing Machine & Supply LLC

Machines of Class P300-o are high speed, needle
feed, two thread
chainstitch machines designed for
general
stitching operations on materials of medium
and heavy
weight.
These machines are available for single needle
or
multiple needle stitching operations such as seam-
ing, binding,
welting, lap seam felling, etc., they
perform outstanding work
on trousers, work clothing,
automotive upholstery, tents, tarpaulins, seat covers
and a
variety of other products.
General
Characteristics
Belt driven arm shaft mounted in front and rear
ball bearings.
Belt driven bed shaft.
Semi-automatic
lubricating system with large ca-
pacity oi I reservior in upper and lower shafts lubri-
cates all principal bearings.
Presser
foot is raised by a treadle operated foot
lifter which also releases the needle thread tension.
Space at right of needle, 10 inches.
Special Features
Style P300-0/194
One needle and one looper.
Alternating pressers with pneumatic pressure con-
trol.
Stitch length, 4 to 12 per inch.
Needle bar stroke, 1-7/16 inches.
Clearance under presser feet, 1/2 inch.
Anti-reversing mechanism.
DESCRIPTION
3
Machine P300-0/201
Two needles and two loopers.
Stitch length, 4 to 12 per inch.
Needle bar stroke,
1-1/4 inches.
Clearance under pressure foot,
3/8 inch.
Gauges (Needle Spacing): 3/16 inch to 2 inches
in steps of 1/32 inch.
Standard gauges, 3/16 inch, 1/4 inch, 3/8 inch,
1/2 inch, 5/8 inch, 3/4 inch, 1-1/4 inches and 1-1/2
inches.
Machine P300-o/401
Four needles and four loopers.
Stitch length, 4 to 12 per inch.
Needle bar stroke,
1-1 I4 inches.
Clearance under presser foot,
3/8 inch.
Gauges (Needle Spacing):
3/4 inch to 2 inches
between
outside needles.
Standard gauges, 1/4 inch -1/4 Inch -1/4 inch,
5/16 inch - 5/16 inch - 5/16 inch, 3/8 inch- 3/8
inch - 3/8 inch, 1/2 inch -1/2 inch -1/2 inch, 1/4
inch- 1 inch- 1/4 inch.
From the library of: Superior Sewing Machine & Supply LLC

HANGERS
OIL PAN
FOOT LIFTER
LEVER
Fig. 3
Fig. 4
Fig. 2
4
INSTALLATION
Assemble oil pan to hangers. Insert assembled
oil pan into machine cut-out of table placing four
rubber
bushings in hanger holes as shown in Fig. 2.
Attach oi I drain jar to oiI pan as shown in Fig. 3.
F-lace machine on oil pan assembly with the
four bed pins passing through the four rubber bush-
ings shown in Fig. 2.
Connect foot Iifter· treadle to foot Iifter lever,
Fig. 4, at back of machine by cha in furnished for
this purpose.
From the library of: Superior Sewing Machine & Supply LLC

LUBRICATION
Machines of Class P300-o have a semi-automatic
lubricating system comprising a
hollow arm shaft
and a hollow bed shaft which act as oil reservoirs.
The
oil is distributed to all of the principal bearings
by centrifugal force through small jets in the shafts
when the machine
is in operation. Provision is also
made for hand lubricating other movable parts which
are not lubricated from the reservoirs.
CAUTION:
Use Union Special Oil, Specification 175, a water
white straight mineral oil of a saybolt viscosity of
90 to 125 seconds at 100 degrees farenheit.
Do not use additives in sewing machine oil as
the-y may cause a reduction in the normal flow of
oil that can result in damage to the machine.
BEFORE STARTING machine, the machine must
be oiled as instructed. Failure to do this wi II result
in damage to the machine.
Pressure Oil Can, furnished with the machine, is
to be used to oil all points requiring lubrication.
TO OIL ARM SHAFT
To fi II arm shaft reservoir, insert spout of pres-
sure oil can in hole, Fig. 5, and inject 1 shot of
oi I into
shaft twice daily.
TO OIL BED SHAFT
To fill bed shaft reservoir, push spring cover,
Fig. 6, to the left, insert spout of pressure oil can
into hole and inject 1 shot of oil into shaft twice
daily. Close oil hole spring cover.
NOTE: Bed shaft may also be oiled from right
hand end of machine.
OTHER OILING POINTS
Apply oil to all work plate and arm oil holes,
needle bar bearings and connections, needle bar rock
frame
bearings, looper rocker sleeve and presser
lifting mechanism.
CAUTION: For machines in continuous use, all
oiling points must be oiled daily. Occasionally oil
tension release mechanism and looper pull-out rack .
5
,... s
SPEED
Maximum speed for Style P300-0/194 is 4000
stitches per minute.
It is advisable to operate new machines at a
speed of
500 stitches less than maximum for the first
100 hours of operation.
Maximum
efficient speed is determined upon the
nature of the operation, the
ability of the operator
and the type of material being sewn.
Maximum speed for Machines P300-Q/201, P300-
0/401
is 4500 stitches oer minute.
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MOVE TO
HIGHEST POINT
MOVE TO
HIGHEST POINT
SCARF OF NEEDLE
TOWARD LEFT
Fig. 7
LOOSEN
SCREW
LOOSEN
SCREWS
6
NEEDLES
Machines P300-Q/201, P300-0/401 use Needles,
Catalog P3260 (62 x 57).
For heavier weight material, needle Catalog
P-
4112 (62x59) may also be used. In this case, the
needle bar must
be adjusted as instructed on page
13.P300-0/194 use Needles, Catalog P4112
(62 x 59)
for medium heavy work or Catalog P3260 (62 x 57)
for medium
light work.
The size of the needle to be used is determined
by the size of the thread which must pass freely
through the eye of the needI e.
Orders for needles should specify quantity re-
quired, size number and catalog number.
To Set
The Needle
Turn machine pulley over toward the operator
until the needle bar is at its highest point, as shown
in Fig. 7.
Loosen needle set screw on single needle ma-
chines or needle clamping screws on multiple needle
machines, as shown in Fig. 7.
Insert needle into needle bar or clamp as far as
it will go making certain that the scarf of each
needle faces toward the left, as shown in Fig. 7.
THREAD
Either left
twist or right twist thread may be
used in the needles and loopers.
Rough or uneven thread, or thread which passes
through the needle eye with difficulty wi II interfer
with
successful operation of the machine.
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THREADitolG THE MACHINE
Upper Threading
Turn machine pulley over toward operator until
needle bar is at its highest point.
Pass thread from unwi nder through thread ing
points indicated in Fig. 8. See insert, Fig. 8, for
correct threading of needle.
Draw approximately two inches of thread through
needle eye with which to start sewing.
Fig. 8
LOOP!R THROW-OUT
RACK ROD
LOOP ! R THROW-OUT
GE AR LOCKING PLUNG ! R ROD
7
Single and multiple needle machines are all
threaded as shown in Fig. 8. Make certain that each
thread passes through thread tension
device.
Machines of Class P300-Q having Alternating
Pressers are equipped with a thread lubricator on
front of the arm. The needle thread must pass through
the lubricator.
Lower Threading
Open front table section, remove bed slide and
turn machine
pulley over toward operator untiI needle
bar is at its highest point.
Move
loopers out of sewing position by pulling
looper throw-out gear locking plunger rod and looper
throw-out
rack rod, Fig. 8, out as far as possible.
This will place loopers in pos ition for· eas i er thread·
ingand prevent accidental operation of machine until
loopers
are returned to sewing position.
Threading The Loopers
Pass thread from unwinder through threading
points as indicated. Draw approximately two inches
of thread through looper eye with which to start
sewing.
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MORE
TENSION
PRESSURE
LESS
TENSION
Fig. 9
Fig. 10
LOOPER
THREADS
Pressure on material should be as light as pos-
sible while still sufficient to insure correct feeding.
Presser Foot Pressure
To regulate presser foot pressure, loosen lock
screw, Fig. 11, at rear of machine. Tighten thumb
screw to increase pressute; loosen to decrease
pressure . When correct feeding pressure is attained,
tighten lock screw.
THUMB SCREW
Fig. 11
LOCK
SCREW
8
TENSION
Tension on thread should be light as possible
while still sufficient to set the stitch correctly in
material.
Needle Thread Tension
To regulate needle thread tension, turn thumb
screw, indicated in Fig. 9, as may be required.
IMPORTANT: Regulate needle thread tension
only when pre~ser foot is down.
Looper Thread Tension
To regulate looper thread tension, turn thumb
screws, as indicated in Fig. 10, as may be required.
Alternating Pressers:
To increase pressure, loosen lower lock nut and
loosen lock screw, then tighten upper lock nut,
see Fig. 12. When correct pressure is attained,
tighten lock screw. Then tighten the lower lock nut.
To decrease pressure, loosen upper lock nut• and
loosen lock screw, then tighten lower lock nut.
When correct pressure is attained, tighten lock
screw. Then tighten the upper lock nut.
Fig. 12
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Alternating Presser with
Pneumatic Pressure Control:
Adjust height of Pressure Cylinder with presser
feet resting on throat plate. There should be a clear-
ance of 1/ 4 inch between the Presser Bar Spring
Fork
and the bottom of the cylinder. To raise cylin-
der, loosen lower lock nut and tighten upper lock
nut, see Fig. 13. To lower cylinder, loosen upper
lock nut and
tighten lower lock nut. When correct
adjustment is attained, tighten both lock nuts.
9
Upper Feed Roll Pressure
To regulate pressure of the upper feed roll, turn
thumb screw as shown in Fig. 15.
INCREASE~
PRESSURE~
b ~ .. DECREASE ;~·)
u ..... ·
~~RESSURE •.... -·····-~ ,.··
/.---· · ·· ··
'
_ ... -·
.- -
·· .. ~ . _ . .... -··"
Fig. 15
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WORM
GEAR
SET SCREWS
PLUNGER
Fig. 16
COVER
PLATE
Fig. 17
SET
SCREWS
BUTTON
NEEDLE
BEARING
10
STITCH LENGTH
To adjust the stitch length, depress plunger,
Fig. 16, located on top of arm. Continue to hold
plunger down and turn machine pulley toward opera-
tor unti I plunger enters notch in arm shaft eccentric.
Then turn plunger to lock in position. Depress but-
ton, Fig. 16, located on machine bed. Hold down,
and turn machine pulley toward
operator to increase
length of stitch, or away from operator to decrease
length of stitch. Letter "A" on machine pulley in·
dicates the longest stitch. When desired length, in-
dicated by letter, is opposite arrow on front of ma-
chine, release button and turn plunger to right or
left untiI it springs outward.
CAUTION: Never turn machine pulley with plung·
er in locked posit ion until button on machine bed
is depressed.
Machine with Puller Feed
The length of the stitch is determined by the
stitch gears in the puller feed mechanism. The
compound feed stitch length should be set slightly
shorter than the stitch length of the puller feed.
To change Puller Feed gears for adjusting stitch
length, remove the two cover plate screws and re-
move cover plate, F ig. 17. Loosen set screws. Slide
puller feed shaft to the right far enough to allow re-
moval of worm and worm gear. Place the new worm
on
cross shaft. Turn worm in the operating direction
and tighten the first set screw into the flat of the
shaft. Then securely tighten both set screws, check-
ing for excess i ve end ploy. Engage the new worm
gearwith the wormand slide puller feed shaft through
the worm gear untiI the end of the shaft is flush
with the needle bearing. Remove end play in the
shaft by setting the two collars against the bracket
and tightening the four set screws. Align the lower
feed
roll with the upper feed roll and tighten the two
set screws. Center the worm gear on the center of
the worm. Tighten the two set screws with the first
screw in the spline of the shaft. Replace cover
plate and adjust the compound feed.
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PRESSER BAR HEIGHT
When the presser foot is raised by the presser
bar lifter and the needle is at its highest position,
the point of the needle should not protrude below
the presser foot.
To adjust, turn machine pulley over toward oper-
ator until needle is at its highest position. Loosen
set screw, Fig. 18. Raise presser foot to the correct
height, place stop collar against upper bracket, and
tighten the set screw.
Machines with Alternating Pressers
The lift of the vibrating and lifting pressers is
controlled by an adjustable eccentric. To adjust,
remove arm cover at rear of machine. Turn machine
pulley over toward operator until feeding presser is
down. Loosen the two lock screws, Fig. 19, and the
two clamp screws. Insert screw driver into notch of
adjusting disc, and turn machine pulley as indicated
in Fig. 19. Then tighten the two clamp screws and
the two lock screws.
When it is desirable to have either one of the
pressers lift higher than the other, turn machine
pulley over toward operator until the lifting presser
is at its highest position. Loosen the two clamp
screws, Fig. 20, and turn lifting rock shaft crank
up or down untiI desired Iift of each presser is
attained. Then tighten the two clamp screws.
CAUTION: Limit lift of pressers to minimum
required for the work, as this permits higher speeds.
,o.
IIIORI
un
tt:t. DISC IIOTOI
..... 19
II
COLLAR NEEDLE BAR
Fig. 18
The vibrating presser should be timed so that
under normal sewing conditions, . the presser foot
wi II seat on the material at approximately the some
time the needle enters material. This timing can be
advanced or retarded slightly depending on the type
of operation being performed, such as sewing over
seams. To adjust, loosen two holding screws, Fig.
20, not more than one ha'lf turn. Then turn the ad-
justable eccentric, Fig. 19, unti! the vibrating
presser seats at the correct time. Securely tighten
the two holding screws after adjustment is mode.
HOLDING
SCREWS
SCREWS
Fl• 20
LIFTING
ROCK SHAFT
CRANK.
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CLAMP
SCREW
FEED LIFT
LINK CLAMP
FEED
DOG
SCREWS
FEE D
ROCKER
Flto 23
FEED LIFT CRANK
TIMING
SCREW
TIMING FLAT
12
TO SET FEED BAR AT CORRECT HEIGHT
When the feed bar is set at the correct height,
the feed lift link clamp will be aligned with the
rock shaft timing flat. To adjust, make certain that
the feed lifting crank timing screw, Fig. 21, engages
shaft spot correctly. Loosen clamp screw and move
the feed
lift clamp link to correct position. Then
tighten clamp screw.
CENTRALIZING FEED DOG
Sidewise Setting
Needle should enter needle hole of feed dog with
the same clearance between the needle and left or
right
side of hole. To adjust, loosen feed dog screws,
Fig. 22. Move feed dog unti I correct clearance is
attained. Hold in position, and tighten feed dog
screws.
Additional adjustment, if necessary, may be
attained by loosening the four rock shaft collar set
screws, the two rock shaft crank clamp screws,
Fig. 22, and feed lifting clamp screw, Fig. 21. Move
complete assembly to required position and tighten
screws.
Lengthwise Setting
The feed dog should clear the ends of the feed
slots in the throat plate equally at both ends of
feed tr.ovel.
To adjust, set feed for desired stitch
length. Loosen the two rock shaft crank clamp
screws, Fig. 22. Move feed rocker forward or back-
ward unti I correct positioning is attained. • Then
tighten the two clamp screws.
SETTING FEED DOG AT CORRECT HEIGHT
When the feed dog height is set correctly, approx-
imately the full depth of the teeth will show above
the throat plate. To adjust, loosen lock nuts, Fig.
23, and slightly loosen feed dog clamping screw.
To raise feed dog turn jack screw clockwise; to
lower turn jack screw counter-clockwise and tap
feed dog down. When correct setting is attained,
tighten the clamping screws and lock nuts.
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TIMING FEED LIFT ECCENTRIC
When the feed dog is at its highest position, the
to'p of the teeth should be parallel with, and project
full depth of teeth above upper surface of throat
plate. To adjust, insert screwdriver in hole in feed
strap and loosen the two set screws, Fig. 24. Move
feed Iift
eccentric forward for earlier rise of feed
dog, or backwards for later rise. Then tighten the
two set screws.
NEEDLE BAR POSITIONING
Needles should enter needle holes of feed dog
toward the front with approximately the same clear-
ance between the front of the needles and the needle
holes as at the side. To adjust, press needle bar
rock frame, Fig. 25, against drive arm, and at the
same time loosen the two driving arm clamp screws.
Continue holding the rock frame against the drive
arm, move needle bar to correct posit ion and tighten
the two clamp screws.
POSITIONING LOOP DEFLECTORS
When loop deflector, located on underside of feed
dog,
is positioned correctly, there should be o clear-
ance of approximately 1/32 inch between the right
side of the needle and the loop deflector. To adjust,
move looper out of sewing position and tilt machine
back on its hinges. Loosen loop deflector screws,
Fig. 26. Move deflectors toward rear of feed dog as
far as the screw slots allow. Tighten slightly to
allow for further adjustment. Return looper to sewing
position and turn machine pulley until needle bar
has descended to bottom of the needle bar stroke.
Tap deflector to left or right until correct clearance
is attained. Move looper out of sewing position and
tighten loop deflector screws.
Fig. 24
Fig. 25
Fig. 26
13
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LOOPER
HOLDER
Fig. 27
1/16 ..
Fig. 28
SETTING THE LOOPER AT CORRECT DISTANCE FROM NEEDLE
Sidewise Setting
When the looper is correctly positioned, the point
of the looper just clears the scarf of the needle on
the forward stroke of the looper. To adjust, turn ma-
chine pulley until the looper point is directly oppo-
side the center of the needle. Loosen looper holder
screw, Fig. 27, and tap holder to left or right until
correct clearance is attained. Then securely tighten
the looper holder screw.
LOOPER CARRIER
CLAMP NUT
Fig. 29
I
NEEDLE BAR j~
CLAMP SCREWS)!~ ' .. \
~ ~
Fig. 30
14
Move looper to extreme forward position. Check
clearance between heel of looper and loop deflector,
Fig. 28, which should be approximately 1116 inch .
To adjust, loosen the two looper set screws. Turn
looper to left or right until correct clearance is
attained. Hold in position and securely tighten the
two set screws.
CAUTION: On single and multiple needle ma-
chines, make certain that the point of each looper
just clears the scarf of i ts respective needle. To ad-
just, with looper point directly opposite center of
needle, loosen the two set screws, Fig. 28, and turn
looper slightly to left or right. Then tighten the set
screws.
Lengthwise Setting and Setting
Height of Needle Bar
When correctly set, the point of the looper should
be directly opposite the center of the needle, and at
the center of the clearance above the eye of the
needle when the looper timing mark LT on machine
pulley is opposite the timing arrow on the arm.
To
adjust the looper, loosen looper carrier c Iamp-
ing nut, Fig. 29. Move carrier forward or backward
until looper point is directly opposite center of
needle. Then tighten clamping nut.
To adjust needle bar, first make certain that
needle is inserted up into the needle bar or clamp
as far as possible. Loosen the two needle bar clamp-
ing screws, Fig. 30, and raise or lower needle bar
to correct position. Then securely tighten the two
clamping screws.
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TIMING LOOPER DRIVING CRANK
When the looper driving crank is properly timed,
the point of the looper will pass above the eye of
the needle at the same distance on both the forward
and backward strokes of the looper.
To adjust when point of looper passes higher on
forward stroke, loosen looper driving crank set
screw, Fig. 31. Loosen looper crank timing screw
(left) approximately 1/8 turn, and tighten looper
crank timing
screw (right). Continue to adjust untiI
correct adjustment is made. Then securely tighten
set screw.
When point of looper passes higher on backward
stroke, reverse the adjustment by loosening timing
screw (right) and tightening timing screw (left).
SETTING THE NEEDLE GUARDS
When needle guards are properly set, they should
pass as close as possible to the needles without
touching. To adjust, turn machine pulley over toward
operator until
the points of the loopers are about to
pass the needles on their forward strokes. At this
point, the looper timing mark LT on the machine
pulley should be approximately
1/8 inch above the
arrow on machine arm. Loosen needle guard set
screws, Fig 32. Turn needle guards as close to t4le
needles as possible without touching. Tighten set
screws. Check by springing the needles to the left
and turning the maching pulley to make certain that
the looper points do not stroke the needles.
Fig. 31
15
TIMING SCREW
(RIGHT)
DRIVING CRANK
SET SCREW
NEEDLE GUARD
SET SCRE W
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4
SPREADER HOLDER -
SET SCREWS
-- ~ ' -l
Fig. 33
POSITIONING SPREADER
Sidewise and Height Setting
When looper on its forward stroke is passing
spreader ••••
The point of the spreader should be exactly
opposite top of thread groove at left side of
looper.
The clearance between spreader point and
looper should be approximately the double
thickness of ordinary paper.
SPREADER
DRIVING
ROCK SHAFT
SPREADER DRIVING
ECCENTRIC SCREWS
FLANGE
Fig. 35
16
SPREADER
Flg.U
To adjust, loosen the two spreader holder
set screws, Fig. 33. Move spreader and holder to
correct position. Hold in position and tighten the
setscrews.
Lengthwise Setting
When the point of the needle on its downward
stroke is even with the point of the spreader, the
clearance between the two points should be approxi·
mately 1/16 inch. To adjust, loosen spreader screw,
Fig. 34, and move spreader forward or backward to
correct position. Then tighten spr'eader screw.
CHANGING MOVEMENT OF SPREADER
The sidewise movement of the spreader may be
adjusted for sewing under abnormal conditions. Under
normal conditions, maximum spreader movement is
generally used. To adjust, tilt machine back on its
hinges, loosen the two · spreader driving eccentric
screws, Fig. 35, and the two spreader driving ec·
centric flange screws. Move eccentric to left to in·
crease movement, or to right to decrease movement.
When correctly positioned, tighten the two spreader
driving eccentric screws first, hold flange against
strap and tighten flange screws. Then refer to pre·
ceeding information regarding positioning of spreader.
CAUTION: When increasing sidewise movement,
allow sufficient clearance between spreader
driving rock shaft, Fig. 35, and left side of ec-
centric ball strap. They should not touch when
eccentric ball stud is in its highest position.
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ADJUSTING NEEDLE THREAD TAKE-UP
The needle thread take-up and thread guide may
be adjusted to increase or decrease the amount of
thread drawn at the top of the needle bar stroke.
To increase the amount, loosen thread take-up set
screw, Fig. 36, and raise take-up or loosen guide
screw and lower the guide. To decrease the amount,
reverse the adjustment by lowering the take-up or
raising the guide.
For average sewing conditions, the guide should
be
set with upper end 5/8 inch above the guide
screw. The thread take-up should be set with the
lower end 1/2 inch below the bottom of its holder.
ADJUSTING NEEDLE THREAD TENSION RELEASER
When correctly adjusted, the tension releaser
should release tension on the needle thread when
the presser foot is raised and allow full adjusted
tension when presser foot is down. To adjust, loosen
set screw, Fig. 37, and move tension releaser cap
out for earlier release of tension or in for later re-
lease. Hold in posit ion and tighten set screw. Should
the tension releaser not release tension· at the cor•
rect time after making the above adjustments, loosen
the tension releaser plate screw and move plate
sidewise to correct position. Then tighten screw.
ADJUSTINGLOOPER THREAD TAKE-UP
The looper thread take-up and guide may be ad-
justed for handIing more or less thread, according to
thickness of material and length of stitch, and to
change the ratio of looper thread in the finished
stitch.
To change the amount of thread handled, loosen
looper thread guide screw, Fig. 38, and looper
thread take-up rod screw. Move thread guide and
take-up rod to the left for more thread or to the
right for less thread. Tighten the two screws
making certain that take-up rod passes through
the center of the guide yoke.
To change ratio of looper thread in finished
stitch, loosen thread guide screw, Fig. 38, and
lower the yoke or right end of thread guide for
more thread. For less thread, raise end of guide.
Hold in position and tighten guide screw.
17
5/8"
GUIDE SCREW
THREAD GUIDE
NEEDLE THREAD
\--.;..;......;---TAKE-UP
Fig. 36
TENSION RELEASER
PLATE
Fig. 37
L OO PER THREAD
TAKE-UP
ROD
, ....
From the library of: Superior Sewing Machine & Supply LLC

From the library of: Superior Sewing Machine & Supply LLC

Cat. No. P51 173
PARTS LIST
STYLES P300-0/194 , P300 -0/ 201, P300-0/401
From the library of: Superior Sewing Machine & Supply LLC

From the library of: Superior Sewing Machine & Supply LLC