Manual No. PT9914 llustrated Parts List for FS300 Series Machines
First Edition Copyright 2000
By
Union Special Corporation Rights Reserved In All Countries
Printed in U.S.A. Jan. 2000
PREFACE
This parts manual has been prepared to assist you in locating individual parts or assemblies on FS300 Series machines.
It can be used in conjunction with Union Special Engineer's Manual EN9424.
It is the desire of Union Special that each machine run at its optimum performance. Parts listed in this manual are
designed specifically for your machine and are manufactured with utmost precision to assure long lasting service.
This manual has been comprised on the basis of available information. Changes in design and/or improvements may
incorporate a slight modification of configuration in illustrations or part numbers.
On the following pages are illustrations and terminology used in describing the parts used on FS300 Series machines.
IDENTIFICATION OF MACHINES ............................................................................................................................... 4
CLASS DESCRIPTION ................................................................................................................................................. 4
STYLE OF MACHINES ................................................................................................................................................. 4
STYLE OF MACHINES CONT. .................................................................................................................................... 5
IDENTIFYING PARTS ................................................................................................................................................... 5
OPERATING THE PEDALS: ....................................................................................................................................... 10
THREADING THE MACHINE: ................................................................................................................................... 12
THREADING THE MACHINE (CONT.): .................................................................................................................... 13
NEEDLE BAR SETTING: ............................................................................................................................................. 17
NEEDLE BAR ............................................................................................................................................................ 25
UPPER MAIN SHAFT ................................................................................................................................................. 27
COVERS, UPPER ARM ............................................................................................................................................ 35
LOWER MAIN SHAFT ............................................................................................................................................... 37
SEWING PARTS ........................................................................................................................................................ 59
NUMERICAL INDEX OF PARTS ................................................................................................................................ 80
NUMERICAL INDEX OF PARTS ................................................................................................................................ 81
3
IDENTIFICATION OF MACHINES
Each UNION SPECIAL machine is identified by a style number, which is stamped into the style plate affixed to the
middle of the machine under the tension assembly. The serial number is stamped into the serial number plate affixed
to the right rear base of the machine.
CLASS DESCRIPTION
Precision high speed, single needle, plain or differential feed flat bed machines. Totally enclosed feed and looper
drive mechanism, automatic forced feed lubrication system with easily replaceable filter. Main feed has thumbscrew
adjustment and differential feed has lever adjustment and independently driven rear needle guard.
STYLE OF MACHINES
FS316L61-3H36CC2PA1DOUBLE LAP SEAM. Three needle, plain feed, high capacity, flat sewing parts, close-
coupled toothed roller puller, pneumatic power "AIR-KLIPP" Chain cutter, pneu
matic assisted presser foot and roller lift, and double lap seam folder with 1/8"
(3.2mm) capacity. For attaching the risers to jeans, seat seaming operations on
jeans, bibs to overalls and piecing sleeves on denim jackets. Seam Specifications
401LSc-3. Recommended needle 128 GAS sizes 140/054 - Stitch range 7-10 S.P.I..
Maximum recommended speed 6000 R.P.M.
FS316L61-3H36PA1DOUBLE LAP SEAM. Three needle, plain feed, high capacity, flat sewing parts, close-
coupled toothed roller puller, pneumatic assisted presser foot and roller lift, and
double lap seam folder with 1/8" (3.2mm) capacity. For attaching the risers to jeans,
seat seaming operations on jeans, bibs to overalls and piecing sleeves on denim
jackets. Seam Specifications 401LSc-3. Recommended needle 128 GAS sizes 140/
054 - Stitch range 7-10 S.P.I.. Maximum recommended speed 6000 R.P.M..
FS316L62-3H36CC2PA1DOUBLE LAP SEAM. Three needle, plain feed, high capacity, .040" stepped chaining
sewing parts, close-coupled toothed roller puller, pneumatic power "AIR-KLIPP"
Chain cutter, pneumatic assisted presser foot and roller lift, and double lap seam
folder with 1/8" (3.2mm) capacity. For attaching the risers to jeans, seat seaming
operations on jeans, bibs to overalls and piecing sleeves on denim jackets. Seam
Specifications 401LSc-3. Recommended needle 128 GAS sizes 140/054 - Stitch
range 7-10 S.P.I.. Maximum recommended speed 6000 R.P.M..
FS316L62-3H36PA1DOUBLE LAP SEAM. Three needle, plain feed, high capacity, .040" stepped chaining
sewing parts, close-coupled toothed roller puller, pneumatic assisted presser foot
and roller lift, and double lap seam folder with 1/8" (3.2mm) capacity. For attaching
the risers to jeans, seat seaming operations on jeans, bibs to overalls and piecing
sleeves on denim jackets. Seam Specifications 401LSc-3. Recommended needle
128 GAS sizes 140/054 - Stitch range 7-10 S.P.I.. Maximum recommended speed
6000 R.P.M..
FS316L63-3H32CC2PA1DOUBLE LAP SEAM. Three needle, plain feed, high capacity, .070" stepped chaining
sewing parts, close-coupled toothed roller puller, pneumatic power "AIR-KLIPP"
Chain cutter, pneumatic assisted presser foot and roller lift, and double lap seam
folder with 1/8" (3.2mm) capacity. For attaching the risers to jeans, seat seaming
operations on jeans, bibs to overalls and piecing sleeves on denim jackets. Seam
Specifications 401LSc-3. Recommended needle 128 GAS sizes 140/054 - Stitch
range 7-10 S.P.I.. Maximum recommended speed 6000 R.P.M..
FS316L63-3H32PA1DOUBLE LAP SEAM. Three needle, plain feed, high capacity, .070" stepped chaining
sewing parts, close-coupled toothed roller puller, pneumatic assisted presser foot
and roller lift, and double lap seam folder with 1/8" (3.2mm) capacity. For attaching
the risers to jeans, seat seaming operations on jeans, bibs to overalls and piecing
sleeves on denim jackets. Seam Specifications 401LSc-3. Recommended needle
128 GAS sizes 140/054 - Stitch range 7-10 S.P.I.. Maximum recommended speed
6000 R.P.M..
4
STYLE OF MACHINES CONT.
FS315L63-3H32CC2PA1Same as FS316L63-3H32CC2PA1 except differential feed.
FS315L63-3H32PA1Same as FS316L63-3H32PA1 except differential feed.
ILLUSTRATIONS
This manual has been arranged to simplify ordering repair parts. Exploded views of various sections of the mechanism are
shown so that the parts may be seen in their actual position in the machine. On the page opposite the illustration will be
found a listing of the parts with their part numbers, description and the number of pieces required in the particular view
being shown.
Numbers in the first column are reference numbers only, and merely indicate the position of the part in the illustration. The
reference number should never be used in ordering parts. Always use the part number listed in the second column.
Component parts of sub-assemblies which can be furnished for repairs are indicated by indenting their descriptions under
the description of the main sub-assembly. As an example refer to the following text.
8.SS7060310SPScrew, for plate strike-off .................................................................................. 1
When a part is common to all machines covered in this manual, no specific usage will be mentioned in the description.
However, when the parts for the various machines are not the same, the specific usage will be mentioned in the description
and, if necessary, the difference will be shown in the illustration.
*Ref. No. showing no Part No. is for location only. Part is not for sale separately.
A numerical index of all the parts shown in this manual is located at the back. This will facilitate locating the illustration and
description when only a part number is known.
IDENTIFYING PARTS
Where 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.
PLEASE NOTE:Part numbers represent the same part, regardless of which manual they appear. On all orders please include
part number, name and style of machine for which the part was ordered.
For optimum performance use only genuine Union Special replacement parts.
NEEDLES
Each needle has both a type and size number. The type number denotes the kind of shank, point, length, groove, finish
and other details. The size number, stamped on the needle shank, denotes the largest diameter of the blade measured
between the shank and the eye. Collectively, the type number and size number represent the complete symbol which
is given on the label of all needles packed and sold by Union Special.
TYPEDESCRIPTION
128 GASShort, double groove, struck groove, ball eye, spotted, round point, chromium plated- Sizes available 080/032,
090/036, 100/040, 110/044, 125/049, 150/060.
When changing the needle, make sure it is fully inserted in the needle holder before the screw is tightened.
When ordering needles, please use the complete type and size numbers as printed on the package to ensure prompt and
accurate processing of your order. A complete order should read as follows: "100 needles, type 128 GAS, size 150/060".
5
SAFETY RULES
1. Before putting the machines described in this manual into service, carefully read the instructions. The
starting of each machine is only permitted after taking notice of the instructions and by qualified
operators.
IMPORTANT! Before putting the machine into service, also read the safety rules and instructions from the
motor supplier.
2. Observe the national safety rules valid for your country.
3. The sewing machines described in this instruction manual are prohibited from being put into service until
it has been ascertained that the sewing units which these sewing machines will be built into, have
conformed with the EC Council Directives (89/392/EEC, Annex II B).
Each machine is only allowed to be used as foreseen. The foreseen use of the particular machine is
described in paragraph “STYLES OF MACHINES” of this instruction manual. Another use, going beyond
the description, is not as foreseen.
4. All safety devices must be in position when the machine is ready for work or in operation. Operation
of the machine without the appertaining safety devices is prohibited.
5. Wear safety glasses.
6. In case of machine conversions and changes all valid safety rules must be considered. Conversions
and changes are made at your own risk.
7. The warning hints in the instructions are marked with one of these two symbols:
8. When doing the following the machine has to be disconnected from the power supply by turning off
the main switch or by pulling out the main plug:
8.1 When threading needle(s), looper, spreader etc.
8.2 When replacing any parts such as needle(s), presser foot, throat plate, looper, spreader, feed
dog, needle guard, folder, fabric guide etc.
8.3 When leaving the workplace and when the workplace is unattended.
8.4 When doing maintenance work.
8.5 When using clutch motors without actuation lock, wait until the motor is stopped totally.
9.Maintenance, repair and conversion work (see item 8) must be done only by trained technicians or
special skilled personnel under consideration of the instructions.
10. Any work on the electrical equipment must be done by an electrician or under direction and supervision
of special skilled personnel.
11. Work on parts and equipment under electrical power is not permitted. Permissible exceptions are
described in the applicable sections of standard sheet DIN VDE 0105.
12. Before doing maintenance and repair work on the pneumatic equipment, the machine has to be
disconnected from the compressed air supply. In case of existing residual air pressure, after disconnecting from compressed air supply (i.e. pneumatic equipment with air tank), the pressure has to be
removed by bleeding.
6
FS300 SERIES BUILDING BLOCK STYLE DESIGNATION SYSTEM
7
CAUTION AREAS:
8
OPERATOR'S DAILY CHECK LIST:
The following should be checked daily and cleaned as required when it applies to your Union Special
machine:
••Lint area (clean with compressed air or brush)
••Needle bar bushings
••Under feed dogs & throat plates
••In knives
••In thread control eyelets
1. The oil level in the sight gauge
should be between the two red
lines when the machine is at rest.
If not, fill with Union Special
Specification 175 oil, (Union Special Part No. 28604R).
2.The correct rotating direction of
••Cooling airways
••In the machine
••In the motor
••In the cooling package
(package is an extra send charge)
the handwheel is counterclockwise, as viewed from the
handwheel's side. NEVER run the
machine in reverse direction.
OPERATING CAUTIONS:
1.Do not put your hand under
the needles when turning on
the power switch or at any
time.
2.Do not put your hand into the
sewing area while the machine
is running.
3.Turn off the power switch and
make sure the clutch motor is
at rest before removing the V
belt.
9
OPERATING CAUTIONS (CONT.):
4.During operation, do not allow head, hands or any instrument, tool etc. near handwheel, V belt and
motor.
5.Do not operate your machine without the proper belt guard, sewing guards or any other protectors that
have been provided. Doing so is very dangerous.
6.Before inspecting, adjusting, cleaning, threading the head or replacing needles, turn OFF the power
switch. Make sure the flywheel on the motor has stopped, it will be kept running by inertia after turning
OFF the power switch. DO NOT depress the foot pedal while the machine is running or it will cause the
machine to rotate abruptly.
7.Turn OFF the power switch when you leave your machine or in case of a power failure.
8.Do not wipe the machine surface with lacquer thinner.
OPERATING THE PEDALS:
1.Locate the center of drive treadle (A) to be in line with the
needles.
2.Locate presser lifter pedal (B) for operator comfort.
3.Use S-shaped hook (C) to connect presser lifter pedal chain (D) to
presser lifting lever (E).
10
LUBRICATION:
The oil should be between the two red lines in sight gauge (B) when the machine is at rest.
1.If oil is required remove oil cap (A).
2.Fill between lines (B) with Union Special Specification 175 oil (Union Special Part No. 28604R).
CAUTION!Do not exceed the upper red marker line. Excessive oil in the machine will result in
oil leakage and possible overheating.
3.To drain oil reservoir, remove oil drain cap (C) on the underside of the machine.
Turn off main power switch before threading! When using clutch motors without actuation lock
wait until the motor has completely stopped.
Thread the machine according to the following threading illustrations.
12
THREADING THE MACHINE (CONT.):
13
threading the machine (cont.):
When the needle thread lubricator is used:
1.Saturate felt (A).
2.Pass thread over felt.
When the needle thread lubricator is not used:
1.Remove felt (A).
The standard needle is 128 GAS, needle range sizes "090/036 150/060."
Insert needle according to the following procedure:
1.Bring needle head (A) to the highest position.
2.Loosen screw (B), insert needle into holes. The needle scarf
should face rearwards as viewed from the operator's side.
THREADING METHODS
CAUTION!
When using an untwisted thread
such as wooly nylon or weak
thread, do not wind it around the
intermediate thread guide.
3.Retighten screw (B).
14
PRESSER FOOT PRESSURE AND LIFTER:
1. Adjust presser foot pressure by loosening nut (A) and turning presser foot adjust screw (B) clockwise to
increase the pressure, counterclockwise to decrease the pressure.
2. Retighten nut (A).
ADJUSTING THE STITCH LENGTH:
Turn off main power switch before setting the
stitch length! When using clutch motors without
actuation lock wait until the motor has completely stopped.
Clockwise to increase the stitches per inch/shorten the
length of one stitch.
Counterclockwise to decrease stitches per inch/increase
the length of one stitch.
2.Numbers 0-11 on stitch regulating screw are for operator's
reference only.
15
FEED, NEEDLE LOOPER TIMING:
Set the first screw in operating direction of the feed drive eccentrics to be straight up, then, holding this
position, set the needle bar at B.D.C.. Set the looper timing to the needles to be synchronized. Adjust the
looper timing with the looper avoid drive sprocket.
NEEDLE ALIGNMENT:
Torque needle head to 14 to 16 in-lbs (1.6 to 1.8Nm).
Install the feed dog, needles and throat plate. Use the adjustable ferrules to align the needles in the throat
plate and align the feed dog so it is centered side to side. tighten the throat plate support and ferrules in
place.
16
LOOPER SETTING:
Use the right needle and looper to set the looper gauge. Set the looper gauge to 1/8" (3.2mm)when loopers
at extreem right. Set the loopers front to back to deflect the needles forward .002" to .006" (.05mm to
.10mm). set the looper avoid so the needle touches the back of the looper 2/3 down back as needles
decend.
NEEDLE BAR SETTING:
Set the needle height so when the top of the needle eye is even with the bottom of the looper (on it's travel
to the left) the looper tip is .020" (.5mm) past the needle. Use the left needle. Recheck looper setting.
Torque needle bar clamp screw to the following specifications:
Torque needle bar@
18 to 20 in.-lbs. (2.0 to 2.3Nm)
17
REAR NEEDLE GUARD:
Set the timing of the rear needle guard so the guard reaches it's furthest travel forward as the loopers enter
the scarfs on the travel to the left.
Bring the looper tips to the center of the needles in the scarf. The tip of the needles should be 3/64"
+/-1/64" (1.2mm +/-.4mm) below the top guarding surface. The guard should just touch the needles up to
.002 (.05mm) deflection. The loopers when traveling to the left should just touch the needles to .002"
(.05mm) clearance when entering the scarf area.
FEED DOG CENTERING AND HEIGHT ABOVE THROAT PLATE:
Set the machine to its longest stitch length. Center feed dog, front to back, so as to obtain equal clearance
on the front side and back side of feed dog in the throat plate slots. Set the feed dogs to come out of the
throat plate level. Set feed dog height to be full tooth at the rear when the feed dog is at the top of its
stroke.
PRESSER FOOT:
Center the needles in the presser foot needle slots. The presser foot lifter lever stop should be set to when
the foot is lifted it does not interfere with the needle head when the needle bar is down.
18
LOOPER THREAD TAKE-UP CAM SETTING:
The looper thread cam should be set so that the looper threads cast off the high lobe of the cam as the point
of the needles are just even with the under side of the looper. Set the cast-off plate eyelets so that when
the looper reaches its left end of travel, all of the looper thread is used and no thread is drawn from the
cone. Move down for less. Set the retaining finger so that the finger is even with the bottom edge of its
holder and the tip on the right side is touching the cast-off plate.
THREAD CONTROL:
Set the individual needle thread eyelets so they are 25mm below the top casting and to the extreme right
when using the mount adapter.
19
PULLER ADJUSTMENTS:
With the roller resting on the top of the throat plate, the stop collar should be set about 15mm above the
ledge of the puller casting where the stop screw rests. Set the stop screw to rest on the casting and lock
in place. Set the lifter lever block to have 0.05mm to 0.15mm clearance above the lifter lever in the neutral
position.
Note: When changing sprockets, if the total number of teeth on both sprockets is differentthan what was
on the puller, check and readjust these settings.
Use the puller tension nut to add or remove pressure frm the roller.
20
PULLER ADJUSTMENTS CONT.:
When assembeling the puller to the
machine, make sure that a minimum of
.05 clearence is maintained between
the roller and the throat plate step.
Also the roller must sit flat on the throat
plate.
Time the puller so the roller feeds at
the same time the feed dog is feeding.
When setting, both should be feeding
at the same S.P.I.. Adjust the timing by
using the sprocket on the upper main
shaft in the arm.
SNOITANIBMOCTEKCORPSRELLUP
EVIRDRELLUP
TEKCORPS
RELLUP
TEKCORPS
2/1±.I.P.S
HCTITS
41518
41412/17
51417
51312/16
31512/18
316
19
61316
21612/19
116101
21
22
BUSHINGS
Ref.
No.
Part No.
1.
50654
2.
50332U
3.
50330CZ
4.
50654A
5.
50344BE
6.
SQ1110401MZ
7.
50344BC
8.
50344E
9.
50344BF
10.
35036BS
11.
50393GE
12.
22571L
13.
50393FU
14.
50393EY
15.
50392AB
16.
PS0400142KH
17.
50381E
18.
50344BU
19.
SQ1110401MZ
Description
Bushing, for needle bar, upper .....................................................................
Pin, for front lifter lever ..................................................................................
Bushing, for presser bar ................................................................................
Bushing, for needle bar, lower ......................................................................
Bushing, for lower mainshaft, left .................................................................