UnionSpecial LF612KlOOHB Setup guide
Adjusting instructions and
illustrated parts list
Two- and Three-needle,
LFGOO
"Standard Class"
plain feed flatbed machines.
From the library of: Superior Sewing Machine & Supply LLC
FOREWORD
This technical manual has been prepared to guide you in the maintenance
of
your new UNION SPECIAL
machine. Careful attention to the instructions for operating and adjusting these machines will enable you
to maintain the superior performance and reliability designed and built into every UNION SPECIAL
machine.
The Adjusting Instruction portion
of
this manual explains in detail the proper setting
for_
each
of
the
components related toforming the stitch and completingthe functions
of
the machine. Figures are used to
illustrate the adjustments using reference letters to point out specific items discussed.
Adjustments are presented in sequence so that a logical progression is accomplished. Some adjustments
performed out
of
sequence may have an adverse effect on the function
of
otherrelated parts.
Implementation
of
PreventiveMaintenanceSchedulecan bringaboutsignificantimprovements inoperator
productivity by avoiding costly equipment breakdowns. Whenever
it
becomes necessary to make repairs
or
replaceparts on yourmachine, be sure to insist on genuine UNION SPECIALRepairParts. These parts
are designed specifically for your machine and manufactured with utmost precision to assure long lasting
service.
This Catalog has been made onthe basis
of
available information. Changes in design and/orimprovements
may incorporate a slight modification
of
configuration in illustrations
or
partnumbers.
LF612KlOOHB
LF612KlOOHC
LF612KlOOHJ
LF612KlOOHR
LF612KlOOMP
LF612KlOOMX
CATALOG
N0.143
N
For
Styles
LF612Kl01MBE
LF612K112HJ
LF613K100HJ
LF613KlOOHR
LF613K101HR
LF613Kll2HR
FirstEdition
Copyright 1990
By
Union Special Corporation
Rights Reserved In All Countries
Printed in U.S.A.
July, 1990
2
From the library of: Superior Sewing Machine & Supply LLC
EachUNIONSPECIALmachine is identified
by
a Style number, which
on
this machine Class, is stamped
into the Style plate affixed to the right front
of
machine. Serial number is stamped into bed casting at the
left rear base
of
machine
NOTE: Instructions stating direction
or
location, such as right, left, front
or
rear
of
machine, are given
relative to the operator'sposition at the machine, unless otherwise noted.
The
handwheelrotates
counterclockwise in operating direction as viewedfrom the right
end
of
machine.
STYLES
OF
MACHINES
High speed, maximum performance, double locked stitch, plain feed flatbed machine. Totally enclosed
feed and looper drive mechanism, fully automatic forced feed lubricating system with easily replaceable
oil filter, quick stitch change, independently driven rear needle guard and quick adjustable looperavoid.
LF612K100HB Two needle, HIGH capacity, for seaming trousers and similar garments made
of
medium
heavy to heavy weight material. Right needle in front. Standard recommended needle
Type
128
GBS, Size 100/040. Available in7 S.P.I.
ONlY.
Standard gaugeNo.1 ONI.Y.
The seam produced has two rows ofstitching with the strength
of
14 S.P.I., yet the fabric
is
moved forward
at.
a rate
of
7 S.P.I. Maximum recommended speed 6500 R.P.M.,
depending on operation.
LF612K100HC Same
as
Style LF612KlOOHB except available in 10 S.P.I.
ONlY.
LF612K100HJ Two needle, HIGH capacity, for attaching risers to dungarees, piecing sleeves on denim
jackets and attaching overall bibs. Includes double lap seam folder 3/32 inch (2.4mm)
capacity. Left needle in front. Standard recommended needle Type 128 GAS, Size
125/049. Stitch range 7-14 S.P.I. Standard gauge Nos.
16
and
18.
Maximum recom-
mended speed 6500 R.P.M., depending on operation.
LF612K100HR Same
as
Style LF612K100HJ except Standard gauge No.
18
ONLY. Stitch range 7-10
S.P.I.
LF612K100MP Two needle,MEDIUM capacity,for piecing sleeves, joiningshoulders and settingsleeves
on ordinary quality shirts made with light to medium weight materials. Includes double
lap seam folder 1/16 inch (1.6mm) capacity. Standard recommended needle Type 192
GLS, Size 75/029. Stitch range 9-20 S.P.I. Standard gauge Nos.
12
and 16. Maximum
recommended speed 6500 R.P.M., depending on operation.
LF612K1
OOMX
Two needle, MEDIUM capacity for quilting collar bands of shirts and similar garments.
Standard recommended needle Type 192 GLS, Size 90/036. Stitch range 14-20 S.P.I.
Standard gauge No. 24 ONLY. Maximum recommended speed 6500 R.P.M., depending
on operation.
LF612K101 MBE Two needle, MEDIUM capacity, for hemming bloomers. Equipped with Close-Coupled
Roller Puller. Standard recommended needle Type 192 GLS, Size 80/032. Stitch range
6-12 S.P.I. Standard gauge No.
16
ONLY. Maximum recommended speed 6500 R.P.M.,
depending on operation.
LF612K112HJ Sameas StyleLF612K100HJexcept-equippedwithpower"AlR-KLIPP" ® ChainCutter.
Standard recommended needle Type 128 GAS, 125/049.
LF613K100HJ Three needle, HIGH capacity, for seaming wind breakers, mackinaws, lumber jacks and
for similar operations on medium heavy to heavy weight material. Equipped with tractor
3
From the library of: Superior Sewing Machine & Supply LLC
type presser foot. Includes double lap seam folder 3/32inch (2.4mm) capacity. Standard
recommended needle Type
128
GAS, Size 125/049. Stitch range 7-10 S.P.I. Standard
gaugeNos. 8and 9. Maximumrecommended speed 6500R.P.M., dependingon operation.
LF613K100HR Three needle, HIGH capacity, for seaming sanforized denim and similar operations on
medium to heavy weight materials. Includes double lap seam folder 1/8 inch (3.2mm)
capacity. Standardrecommended needle Type
128
GAS, Size 125/049. Stitchrange 7-14
S.P.I. Standard gauge Nos. 8 and
9.
Maximum recommended speed 6500 R.P.M.,
depending on operation.
LF613K101HR Three needle, HIGH capacity, for seaming sanforized denim and similar operations.
Equipped with Close-Coupled Roller Puller. Includes double lap seam folder. 1/8 inch
(3.2mm) capacity. Standard recommended needle Type
128
GAS, Size 125/049. Stitch
range 7-10 S.P.I. Standard gauge Nos. 8 and
9.
Maximum recommended speed 6500
R.P.M., depending on operation.
LF613K112HR SameasStyleLF613K100HRexcept-equippedwithpower"AIR-KLIPP®" ChainCutter.
®"AIR-KLIPP" is a registered trademark
of
Union Special Corporation.
4
From the library of: Superior Sewing Machine & Supply LLC
SAFETY RULES
A
CAUTION!
THIS SYMBOL INDICATES YOUR PERSONAL SAFETY
IS
INVOLVED
TOPREVENTPERSONAL INJURY:
-All power sources to the machine MUST be TURNED OFF before threading, oiling, adjusting, or
replacing parts.
-Wear safety glasses.
-All shields and guards MUST be in position before operating machine.
-
DO
NOT tamper with safety shields, guards, etc., while machine is in operation.
LUBRICATION
IMPORTANT: Machine must be in a leveled position.
Oilhas beendrainedfrom mainreservoirbefore shipment. Usea straightmineraloilwithaSayboltviscosity
of90
to 125 seconds at 100°Fahrenheit. This is equivalent to UNION SPECIAL Specification No. 175.
Remove oil filler cap (A, Fig.
1)
and fill to the TOP line
of
oil level gauge (B). Replace oil filler cap.
CAUTION!
On
new machines, machines that have been out
of
service for an extended period
of
time
OR
machines that have been drained
of
oil and refilled .... RUN MACHINE SLOWLY at
300 R.P.M. for approximately five minutes while paying strict attention to the oil flow
indicator which should rise in the oil filler cap (A) and remain steady while machine is
running. This must be noted to ensure that oil flow indicator is functioning and oil is
circulating. Checkoil level while machine is running which MUST be maintainedbetween
the redlines
of
oil level gauge.
To maintain maximum recommended speed and serviceability
of
these machines, refer to General-
Preventive Maintenance Schedule. Under no circumstances, should oil remain in the machine for more
than oneyear. Oildrainplugislocatedin bottom
of
oilpan. ALWAYS changeoilfilterwhenoilischanged.
At this time, evaluate the contaminated condition
of
the oil to determine
if
the oil filter should be changed
more or less frequently. To replace filter, remove four screws (C, Fig.
1)
and cover (D); lift out filter
cartridge. REMOVE (brass) BY-PASS VALVE
FROMTOPOFOLDFILTERAND
INSTALLIN NEW
FILTER. Reassemble in reverse manner.
5
From the library of: Superior Sewing Machine & Supply LLC
P100B
LUBRICATION DIAGRAM
•
PRESSURE
OIL
•
SIPHON
RETURN
~TfM!~!f@
FILTER
BY-PASS
Fig.1
6
From the library of: Superior Sewing Machine & Supply LLC
NEEDLES
Eachneedle has botha type andsize number. Type numberdenotes the kind
of
shank,point,length, groove,
fmish, and other details. Size number, stamped on the needle shank in metric, denotes largestdiameter
of
blade, measuredmidway betweenshankandeye. Collectively, type andsize numberrepresentthecomplete
symbol, which is given on the label
of
all needles packaged and sold by UNION SPECIAL CORPORA-
TION.
Thetype numbers
of
the needles recommendedfor each Style
of
machinecovered by this catitlog are given
in the machinestyle description. Otherneedles are available, butthe onesindicatedarethoserecommended
to producethe mostsatisfactory results. The type numbers
of
the recommended needles togetherwith their
descriptions, and the sizes available are listed below:
NEEDLE TYPE
128 GAS
128 GBS
192GLS
DESCRIPTION
Round shank, round point, short, double
groove, struck groove, ball eye, spotted,
chromium plated.
Round shank, round point, short, double
groove, struck groove, ball eye, spotted, ball
point, chromium plated.
Round shank, round point, extra short, double
groove, struck groove, ball eye, spotted
(plated) thin ball point, chromium.
SIZES AVAILABLE
80/032, 90/036,
100/040, 110/044,
125/049, 140/054,
150/060, 170/067.
80/032, 90/036,
100/040, 10/044,
125/049, 140/054,
150/060.
55/022, 65/025,
70/027, 75/029,
80/032, 90/036.
To have needle orders promptly and accurately filled, an empty package, a sample needle,
or
the Type and
Size number should be forwarded. Use description on label. A complete orderwould read
"1
000 needles,
Type 128 GBS, Size 90/036".
NOTE: On earlier styles, machines equipped with a DURACOAT ALUMINUM needle bar, TORQUE
needle barconnection screw, 16 to
18
in-lbs (18.4 to 20.7 ern/kg).
On later styles, machines equipped with a STEEL needle bar, TORQUE needle bar connection
screw, 22 to 25 in-lbs (25.3 to 28.8 ern/kg).
TIIREAD MACHINE AS ILLUSTRATED.
7
From the library of: Superior Sewing Machine & Supply LLC
A193A
PIVOT
GUARD
TO
LEFT FOR
•
For
ease
of
threading,
looper
holder
to
the
right.
CAUTION!
Looper
holder
MUST
·be
returned
to
extreme
left
and
LOCKED
by
pulling
release
lever
up
before
sewing.
THREADING DIAGRAM
8
TWO
THREAD
From the library of: Superior Sewing Machine & Supply LLC
TIMING FEED TO NEEDLE
Adjustment would be required
if
the machine is feeding
while the needles are in the work.
This can be accomplished by removing top cover, head
cover, left cloth plate, andtop feed chambercover. Rotate
handwheel in operating direction to position needle barat
bottom
of
stroke. At this time, the first screw (A, Fig. 2)
in the feed drive eccentric (B) must be on the flat
of
the
feed drive shaftandin a vertical position. Adjustmentcan
be made by loosening two screws (A, Fig. 3) in upper
mainshaft sprocket (B). Hold the handwheel fmnly with
needle baratbottom
of
stroke androtatepulleyas required
toposition screw (A,Fig. 2) so itis vertical. Torque screws
(A, Fig. 3) to 55 in-lbs. (63 em/kg).
NOTE:,
Whenever "TIMING FEED TO NEEDLE" is
corrected, always check "SYNCHRONIZING
LOOPER AND NEEDLE MOTIONS."
SYNCHRONIZING LOOPER
AND
NEEDLE MOTIONS
NOTE: Endcover has been removedfor clarity in Fig-
ure 4, but MUST BE IN POSITION WHILE
MAKING
THE
FOLLOWING
ADJUST-
MENTS. ,
Looper drive belt, (A, Fig. 4) has proper tension if, when
turning handwheel inoperating direction
to
position looper
in the center
of
its (right to left) travel...
..
there is no
noticeable (right to left) play in the looper mechanism.
There should be approximately 1/8 inch (3.2mm) deflec-
tion in looperdrive belt when pressing fmnly with thumb,
midway between sprockets
(B
and C). Adjustment can be
made by loosening two screws (A, Fig. 5) and tum looper
module (D, Fig. 4) counterclockwise to tighten belt or
clockwise
to
loosen,
as
viewed in Figure
4.
Retighten
screws (A, Fig. 5).
To synchronize machine, remove needle bareyelet guard,
needle thread take-up cam wire, needles, presser foot,
throat plate, loopers, and feed dog. Tum handwheel to
position needle bar at BOTTOM
of
stroke and looper
holder atEX1REMEright end
of
travel.
9
Fig.2
Fig.3
Fig.4
From the library of: Superior Sewing Machine & Supply LLC
Fig.S
Sketch A
Fig.6
SYNCHRONIZING LOOPER
AND
NEEDLE MOTIONS (Continued)
UsinggaugeNo. 21227 AC,mountgaugeplate withthro.at
plate attaching screws. Insen pin (included with gauge)
into looper holder. Mount indicator block to machine
head
with one
of
the screws removed from needle bar eyelet
guard.
lnsen
shank
of
indicatorgauge into indicatorblock
and tighten screw against shank. (See Sketch A for refer-
ence).
NOTE:
For
Style
LF612Kl01MBE
use
21227 T
mounting plate.
Rotate handwheelinOPERATING direction until the pin
in looper holder contacts gauge plate. Loosen screw (A,
Fig.
6)
in needle bar connection (B) and position needle
bar (C)
as
required to set the pointer
of
indicatorgauge at
"0"
and tighten screw (A) VERY LIGH1L
Y.
IMPORTANT: Refer to NOTE, page 7 for proper
TORQUE
of
screw.
Rotate handwheel in REVERSE direction until pin in
looper holder again makes contact with gauge plate and
note the reading on the gauge. A variation
of
(1) gradua-
tion on the scale is permissible.
If
the reading is above
"0",
loosen screws (E, Fig. 4) and tum rear looper drive
sprocket (B) towards the operator (clockwise as viewed
in Figure 4).
If
the reading is below
"0",
tum sprocket
away from operator (counterclockwise as viewedinFig-
ure 4). Temporarily snug screws.
Rotate handwheel in OPERATING direction until pin in
looper holder contacts gauge plate and note the reading
on scale.
If
the reading is above
"0",
loosen screws (E)
and turn sprocket (B) away from operator (counterclock-
wise
as
viewed in Figure 4).
If
the reading is below
"0",
turn sprocket towards the operator (clockwise as viewed
in Figure 4). Temporarily snug screws.
10
From the library of: Superior Sewing Machine & Supply LLC
SYNCHRONIZING LOOPER
AND
NEEDLE MOTIONS (Continued)
Continue to check and adjust in both OPERATING and
REVERSE directions until pointer
of
indicator gauge
comes within (1) graduation onthe scale when turning the
handwheel ineitherdirection.
Beforetightening screws (E) securely, be sure to have .002
inch (.051mm) clearancebetweensprocket(B) andneedle
guarddrive connecting rod (F).
If
a synchronizing gauge is not available.... turn the hand-
wheel in operating direction to position right looper point
evenwiththeleftside
of
rightneedleandcheckthedistance
from the eye
of
needle to the bottom
of
looper blade.
Turn handwheel in reverse direction to position looper
point even with the left side
of
RIGHT needle and check
the distance from the eye
of
needle to the bottom
of
looper
blade.
If
the distance was greater when handwheel was
turned in operatirng direction, (as viewed in Sketch B)
loosenscrews (E,Fig. 4) andturn rearlooperdrive sprock-
et(B) away from operator (counterclockwise
as
viewedin
Figure4).
If
thedistance was greaterwhen handwheelwas
turned in reverse direction, (as viewed in Sketch C) tum
sprocket towards the operator (clockwise as viewed in
Figure 4). Temporarily snug screws.
Continue to check and adjust in both OPERATING and
REVERSEdirections until thedistancefrom the eye
of
the
RIGHTneedle to the bottom
of
looperblade is the same in
eitherdirection, (as viewed in Sketch D).
Before tightening screws (E, fig. 4) securely, be sure to
have .002 inch (.051mm) clearance between sprocket (B)
and needle guard drive connecting rod (F).
11
t[§
~:EATEST
_j
r
LOOPER IN
FRONT
OF
NEEDLE
OPERATING
DIRECTION
A107
A108
A
109
LOOPER
BEHIND
NEEDLE
SketchB
GREATEST
SketchC
REVERSE
DIRECTION
For Proper SYNCHRONIZATION
of
Looper & Needle
Dimensions
will
-------
Looper
BEHIND
Needle
in
OPERATING
Direction
SketchD
in
REVERSE
Direction
From the library of: Superior Sewing Machine & Supply LLC
NEEDLE BAR ALIGNMENT
Insert a new set
of
needles. As a temporary setting, the
TOP
of
needle bar (A, Fig. 7) should be approximately
17/8 inches (47.6mm) from the TOP
of
upper needle bar
bushing when needle bar connection (B) is positioned at
TOP
of
STROKE as shown in Figure 7. Adjustment can
bemade byloosening screw (C), reposition needle barup
ordown as requiredandtighten screw (C) VERYLIGHT-
LY.
IMPORTANT: Refer to NOTE,
page
7 for proper
TORQUE
of
screw.
Rotate handwheel to ensure that needles center in the
needle holes
of
throat plate as shown in Figure
8.
Adjust-
ment can be made by loosening screw (C, Fig. 7) slightly,
allowing needle bar to be rotated
as
required, while being
careful to maintain the temporary height setting and
tighten screw (C)
AS
SPECIFIED. An additional 4-way
directional adjustment
of
the throat plate can be ac-
complished
as
follows:
Fig.8
IMPORTANT: Adjustmentofthroatplatemustbecoor-
dinated between needles and feed dog; refer to "FEED
DOG SETTINGS". Loosen two screws (A, Fig. 8)
in
throat plate support (B). Loosen two screws (C) which
secure locating ferrules, allowing the throat plate support
to be repositioned slightly. Tighten screws (C) first, then
screws (A).
Fig.9
CAUTION!
DO
NOT wedge
or
pry with any type
of
tool, as damage to needle bar may result.
LOOPER SETTINGS
If
not previously done, insert a new set
of
needles; type
and size specified. With looperholderatEXTREMEright
end
of
travel, distance from centerline
of
RIGHT needle
topoint
of
RIGHTloopershouldbedimension (A, Fig.9);
see chart. Adjustmentcan be madebypullingreleaselever
(B) down and loosening screw (A, Fig. 10) in stop collar
(B). Apply pressure against the upper portion
of
looper
12
Fig.lO
From the library of: Superior Sewing Machine & Supply LLC
LOOPER SETTINGS (Continued)
holder (C) to the
LEFf
while turning screw (D) in looper holder clockwise to increase looper gauge
or
counterclockwise to decrease. Applicable looper gauge can be used advantageously in making this
adjustment Continue to apply pressure against upper portion
of
looper to the
LEFf
while turning stop
collar (B) to its EXTREME CLOCKWISEposition and tighten screw (A) securely. Push up release lever
(E)
to
lock looperholder in position. Adjust screw (C, Fig. 9) which incorporates a spring plunger, against
the recess in cam
of
stop collar as required to attain the following conditions:
Pull release lever down and be able to push looper holder to the right, with a snapping motion (making
loopers easily accessible for threading). Push looper holder
to
the left, with a snapping motion. Apply
pressure againstupperportion
of
looperholder to the
LEFf
andpush release leverup to locklooper holder
in operating position.
Inlockedposition, the release lever should be approximately inline with middle looperas viewedfrom the
right side
of
looper holder. Adjustment can be made by loosening screw (D, Fig. 9), reposition release
lever as required andretighten screw.
Loopers must also be set so, as they travel to the left behind the needles, NOT to touch, but with a
MAXIMUM clearance
of
.002 inch (.051mm). Adjustment can be made by pulling release lever down,
loosening screw (A, Fig. 10) in stop collar (B) allowing looper holder to be movedforward
or
rearward on
its shaft,
as
required. Apply pressure against upperportion
of
looperholder to the
LEFf
while turning stop
collar (B) to its EXTREME CLOCKWISE position and tighten screw (A) securely and pushrelease lever
up in locking position. RECHECK looper gauge.
MACHINE STYLE
LF612K100HB-1
LF612KlOOHC-1
LF612K100HJ-16
LF612K100HJ-18
LF612K112HJ-16
LF612K112HJ-18
LF612K100HR-18
LF612K100MP-12
LF612K100MP-16
LF612K100MX-24
LF612K101MBE-16
LF613K100HJ-8
LF613K100HJ-9
LF613K100HR-8
LF613K100HR-9
LF613K101HR-8
LF613K101HR-9
LF613K112HR-8
LF613Kll2HR-9
DIMENSION A FIG. 9
5/32 inch (4.0mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
1/8 inch (3.2mm)
1/8 inch (3.2mm)
1/8 inch (3.2mm)
1/8 inch (3.2mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
5/32 inch (4.0mm)
13
LOOPER GAUGE NO.
21225-5/32
21225-5/32
21225-5/32
21225-5/32
21225-5/32
21225-5/32
21225-5/32
21225-1/8
21225-1/8
21225-1/8
21225-1/8
21225-5/32
21225-5/32
21225-5/32
21225-5/32
21225-5/32
21225-5/32
21225-5/32
21225-5/32
From the library of: Superior Sewing Machine & Supply LLC
Fig.ll
Fig.12
Fig.13
NEEDLE BAR HEIGHT
Turn handwheel in operating direction until POINT
of
RIGHT looper (A, Fig. 11) is even with the LEFT side
of
RIGHT needle (B). TOP
of
needle eye should be
l/64
inch (.4mm) below the undersurface
of
looper blade, as
shown in Figure
11.
Adjustment can be made by loosen-
ingscrew (A, Fig. 12) andmove needlebar(B) up ordown
as
required. TORQUE screw (A).
IMPORTANT: Refer to NOTE, page 7 for proper
TORQUE
of
screw. Care must be
taken not to disturb ALIGNMENT
of
needle bar while making this adjust-
ment.
NOTE: DO NOT wedge with any type
of
tool,
as
damage to needle barmay result.
LOOPER AVOID
Machine is equipped with a quickadjustable looper avoid
mechanism to accommodate extreme differences in
needle sizes.
As
the looper travles from left to right with
needle bar descending, the needle points should contact
ONLY the lowerTHIRD
of
the back
of
looper blades.
If
looper avoid requires re-setting, loosen two screws (A,
Fig. 13) and turn eccentric stud (B) towards the plus side
(counterclockwise)for MORElooperavoidortowards the
minus side (clockwise) for LESS looper avoid. When
desired setting is acquired, tighten screws (A).
NOTE: Whenever looper avoid is changed, always
recheck "LOOPER SETTINGS".
REAR NEEDLE GUARD TIMING
AND ADJUSTMENT
Rotate handwheelinoperatingdirection toposition looper
points at the RIGHThandside
of
needles. Atthis timethe
needleguard(C, Fig. 13) shouldbeatitsEXTREMEEND
of
FORWARD travel. Adjustment can be made by
loosening two screws (A, Fig. 14) and turn needle guard
eccentric (B) slightly as required until this condition ex-
ists. Ensure .002 inch (.05lmm) clearance between
needle guard eccentric (B) and looper drive sprocket (C)
while tightening screws (A) securely.
14
From the library of: Superior Sewing Machine & Supply LLC
REAR NEEDLE GUARD TIMING
AND
ADJUSTMENT(Continued)
At extreme forward end
of
travel, rear needle guard (C,
Fig. 13) mustbe sethorizontallynottocontactneedles (D)
with a MAXIMUM clearance
of
.002 inch (.05lmm).
Guardshouldbe setas low as possible,yethaveits vertical
face approach approximately 3/64inch (1.2mm)
of
needle
points until point
of
loopers moving to the left, are even
with the right side
of
needles. Adjustment can be made
by loosening screw (E), reposition needle guard
as
re-
quiredandretighten screw.
If
additionalfronttorearadjustmentis requiredto maintain
needle guardina horizontalposition, loosenscrew (D, Fig.
14) in pivot link which allows needle guard shaft to be
rotated. Be sure
to
take up thrust, by exerting pressure
against needle guard holder to the left and pivotlink to the
right, when tightening screw (D).
NOTE: Change in stitch length WILL NOT require
change in needle guard setting, but a change
of
needle SIZE, may.
FEED DOG SETTINGS
Feed dog should be centered in throat plate with equal
clearanceon both sides andends. Feeddog should be level
with and parallel to the top
of
throat plate
as
it begins to
rise. At highest point
of
travel, feed dog teeth should
extendthedepth
of
afull tooth,
or
approximately3/64inch
(1.2mm) above throatplate. MINOR (right to left) adjust-
ments can' be made by loosening two screws (A, Fig. 15)
in throatplate support (B). Loosen two screws (C) secur-
ing two locating ferrules which allow movement to align
throatplate support. Reposition slightly
as
required, con-
sideringboth needle hole slots andfeed dog slots. Tighten
screws (C) first, then screws (A). Fronttorear adjustment
canbe made by turning stitch regulatingknob (A, Fig. 16)
counterclockwise to obtain LONGEST stitch length.
Remove rear feed chamber cover which is secured with
four screws.
15
Fig.14
Fig.15
Fig.16
From the library of: Superior Sewing Machine & Supply LLC
Fig.18
Fig.19
FEED DOG SETTINGS (Continued)
Loosen Allen screw (A, Fig. 17) and turn eccentric (B)
while rotating handwheel in operating direction to obtain
equal clearance in throat plate, front and rear. Tighten
screw (A) securely.
Feed dog can be leveled or tilted by loosening screw (A,
Fig.
18)
and rotate feed rocker tilting shaft (A, Fig. 19)
slightly
as
required. Punch mark on shaft must be facing
operator. Checkparallelism
of
feed dog byplacingthroat
plate in position. Before tightening screw (A, Fig. 18),
make sure to have approximately .002 inch (.051mm)
clearance between feed rocker (B) and spacer sleeve (C).
IMPORTANT: Recheck front to rearclearance
of
feed
dog in throat plate slots whenever feed
rocker tilting shaft has been reposi-
tioned. Replace rear feed chamber
cover.
With feed travel set to desired stitch length, set feed dog
height as specified by loosening mounting screw (D, Fig.
15)
to position
as
required. Feed dog supporting screw
is
located in the feed dog holder, adjust as required to
support feed dog before tightening screw (D).
CHANGING STITCH LENGTH
Stitchlength is changed by turning stitch regulating knob
(A,
Fig.
16)
clockwise
to
shorten
the
stitch
or
counterclockwise to lengthen the stitch. Recheck front to
rearclearanceunder "FEEDDOGSETTINGS" whenever
stitch length
is
changed. Stop collar (B, Fig. 19) at rear
of
machine attached to stitch regulating knob shaftcan be
set to prevent stitch length regulating knob (A,'Fig. 16)
from accidentally being turned beyond the desired stitch
length.
16
From the library of: Superior Sewing Machine & Supply LLC
PRESSER BAR AND PRESSER FOOT
With needle bar at bottom
of
stroke and presser foot resting squarely
on
throat plate, there should
be
a
minimum clearance
of
1/64 inch (.4mm) between the bottom
of
screw (A, Fig. 20) and bottom
of
slot in
presser bar guide plate (B). At this time, there should be at LEAST
1132
inch (.8mm) clearance between
bottom
of
presserbarguide and top
of
lowerpresser barbushing. There should also be 1/16 inch (1.6mm)
clearancebetweenbottom
of
slotin lifterleverlink(C) andbottom
of
presserbarguide
(D)
whenfoot lifter
lever is released. 1f adjustment is required, proceed as
follows:
Back
off
presserbarspringregulatorto release tension
on
spring. Loosen two screws (E) in presser bar guide (D).
Loosen nut (F) and turn screw (A) down against guide
plate
(B)
to obtain at least 5/64 inch (2.0mm) clearance
between bottom
of
presser bar guide (D) and guide plate
(B). Align presser foot with needles and press down
FIRMLY while tightening two screws (E) in presser bar
guide (D).
NOTE: This setting was necessary to prevent damage
to the scraper edge
of
presser bar bushing,
should presser foot beremovedfrom machine.
Turn presser bar spring regulator down. Back
off
screw
(A) toobtain 1/64inch (.4mm)dimensionbetweenbottom
of
screw andbottom
of
slotin presserbarguide plate (B),
lock nut (F).
Loosen screw (G) in lifterarm
(H)
androtate arm slightly
as required to obtain the 1/16 inch (1.6mm) dimension
between link (C) and guide (D), retighten screw (G)
ensuring no left to right shake in lifterarm (H).
Adjust presser bar spring regulator so
it
exerts only
enoughpressure on presserfoot to feed theworkuniform-
ly.
Turning
it
clockwise
increases
the
pressure,
counterclockwise acts the reverse.
LOOPER THREAD TAKE-UP AND CAST-OFF
PLATE
Looperthread take-up (A, Fig. 21) mustbe centeredfront
to back in cast-offplate (B).
It
should also be positioned
so as the needle bar is descending, the looper threads are
"cast-off' the highest lobe
of
looper thread take-up when
the point
of
the left needle is even with the bottom
of
its
looper blade.
17
1/16"
(1.6mml
Fig.21
From the library of: Superior Sewing Machine & Supply LLC
LOOPER THREAD TAKE-UP AND CAST-OFF PLATE (Continued)
If
adjustmentis required, lift cast-offplate up. Loosen screw (A, Fig. 22) in positioning collar (B) and two
screws (C) inlooperthreadtake-up. Advanceorretardtake-up asrequired. Tightentwoscrews (C) securely
in take-up making sure itis centered in
cast~off
plate. Positioning collar (B), which has a slot in its face,
mustbe alignedwithtwo screws which secure thediscs
of
take-uptogetherwhileTHRUSTINGpositioning
collar forward against take-up. Remove the play between screw heads in take-up and slot in positioning
Fig.22
Fig.23
Fig.24
collar by applying pressure on the collar CLOCKWISE
while tightening screw (A) securely. Cast-off plate (B,
Fig. 21) should be positioned horizontally. Which can be
adjusted byrepositioning latch (C). Setadjustable eyelets
(D) in the center
of
their mounting screws. More orless,
looper thread can be supplied in the stitch by moving
adjustable eyelets to the right orleft respectively.
If
retaining finger is rubbing take-up, loosen screw (E),
center the fmger (F) and retighten screw.
If
retaining
finger is on an angle, loosen screw (G), turn retaining
finger support(H)slightly
as
requiredandretighten screw.
Theheight
of
retainingfingercanbe adjustedbyloosening
screw (J), settorequiredheightandtighten screw securely.
THREAD TENSION RELEASE
Needle thread tension assemblies (A, Fig. 23) are set
correctly when the tension discs (B) start to release
as
the
presserfoot is raisedto within 1/8 inch (3.2mm)
of
the end
of
its travel andcompletely releasedwhenpresserfoothas
reached its highest position.
Adjustment can be made by removing plastic plugs (C),
and loosening screws (D) and lower tension assemblies
(A) to advance the release action
or
raise tension as-
semblies to retard the release action. Hold tension as-
semblies in position while retightening screws (D).
Reassemble plastic plugs securely.
Loosen lock nut (A, Fig. 24) and adjust screw (B) in
presserfoot lifter lever, allowing presserfoot to be raised
to its highest position without interfering with needle
head. Lock nut
(A)
securely.
THREAD CONTROL SETTINGS
Needle bareyelet(A, Fig. 25) shouldbe setwithits eyelets
1/16 inch (1.6mm) below strike-off (B) on needle thread
take-up cam wire (C), as shown in Figure 25, with needle
bar at BOTTOM
of
stroke.
Adjustments can be made by bringing needle bar up,
loosen screw (D) slightly, bring needle bardown to BOT-
TOM
of
stroke, reposition eyelet (A) as required and
18
From the library of: Superior Sewing Machine & Supply LLC
THREAD CONTROL SETTINGS (Continued)
bring needle bar back up. Torque screw (D) to 10 in-lbs
(11.5 em/kg).
Needlethreadtake-up cam wire(C) shouldbe setto barely
contact needle threads with needle bar at top
of
stroke.
Adjustment can be made by loosening cam mounting
screw(E),reposition cam forward
or
rearward as required
and retighten screw . Auxiliary strike-off (F) should be
set so needle threads contact strike-offwhen needle bar is
at BOTTOM
of
stroke with Thread Control Assembly
Fig.26
Fig.27
adjustable eyelet (C, Fig. 26) set at "T". Loosen secrew
(A) and position strike-off (B) as specified and retighten
screw. Thread tension on needle thread should be just
enough to pull
up
uniform stitches. Thread tension ap-
plied on looper thread should be just enough to steady
thread.
POWER "AIR-KLIPP" CHAIN CUTTER
ADJUSTMENTS
Upper knife (A, Fig. 27) can bereplacedbyremoving two
screws (B).
To
replace lower knife, the upper knife must
be removed and rear suction tube cover. Loosen two
screws (C) and slide housing (D) towards the rear.
Remove throat plate support with throat plate attached.
Remove screw (A, Fig. 28) and lift up thread inlet (B).
Unhook knife spring (E, Fig. 27) and remove lowerknife
(F). Reassemble knives in reverse manner. Reassemble
thread inlet (B, Fig. 28) and slide housing (D, Fig. 27)
forward against rear
of
throat plate; tighten two screws
(C).
Fig.28
19
From the library of: Superior Sewing Machine & Supply LLC
0
A130
1/32"
(.8mm)
(//)
PUSH
HERE
TO
STALL
KNIFE
KNIFE CROSS OVER
SHEAR
ANGLE
A
131A
SHEAR ANGLE
Fig.29
SETIING
KNIFE CROSS OVER
Adjustment may benecessary afterreplacing
or
repairing
knives. With sewing motor switch in "OFF" position and
air lines connected to air motor, depress treadle until air
motor begins to operate, in and out.
IMPORTANT: Be sure that lower knife does NOT
strike against knife housing
or
feed
chamber cover. Adjustment should be
accomplished byloosening two screws
(G, Fig. 27) and reposition air motor
(H) left
or
right slightly, but under ex-
treme circumstances
it
may become
necessary to shortenthe stroke
oflower
knife travel by repositioning coupling
(J).
Carefully press against lower knife (F, Fig. 27) until air
motor stalls. With treadle still depressed, check the knife
cross over. Cross over
of
lower knife to upper knife is
positioned correctly when the lower knife is 1/32 inch
(.8mm) from the front
of
upper knife as shown in Figure
27.
If
adjustmentis required, loosen screw
(K)
andreposi-
tioncoupling(J)
as
requiredtoobtainspecifieddimension.
SHEAR ANGLE
Adjustment
of
shear angle can be made by loosening nut
(A, Fig. 29) and turning screw (B) clockwise (a small
amount at a time) while manually operating knife lever
(C),continuously checking with a piece
of
threadto see
if
knives are cutting. As soon as the knives fail to cutthread
and the shear angle is zero, turn screw (B) counterclock-
wise approximately 1/4turn and lockwith nut (A). Check
cutting action
of
knives when air motoris operating.
CAUTION! Turning screw (B) clockwise to an EX-
TREME
may
cause
damage
to
"AIR-
KLIPP" Chain Cutter assembly.
SETIING
PRESSURE VALVES
Regulate valve on pneumatic control device for airmotor
of
the "AIR-KLIPP" chain cutter to approximately 20-22
p.s.i. (1.5 bar) when airmotoris operating. Regulatevalve
on pneumatic control device for the suction air to obtain
maximum suction, yetso that the FABRIC
TO
BESEWN
will not be cut by the "AIR-KLIPP" chain cutterknives.
20
From the library of: Superior Sewing Machine & Supply LLC
This manual suits for next models
11
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