Union Special PT0602 GR Parts Book

ADJUSTING INSTRUCTIONS / ILLUSTRATED PARTS LIST

REV 10/17/06

35800

High Speed

Feed- Off- The- Arm

With

Plain Feed

Differential Feed

MANUAL NO. PT0602-GR

STYLES

35800BLWG

35800BQWG
35800BWDNG
35800BWDRG

35800BWWG
35800BWWPG

Manual No. PT0602-GR Adjusting Instructions & Illustrated Parts List for

35800 Series Machines

First Edition Copyright 2006

By

Union Special Corporation Rights Reserved In All Countries

Printed in U.S.A. October 2006

PREFACE

This parts manual has been prepared to assist you in locating individual parts or assemblies on 35800 Series machines.
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 35800 Series machines.

2

CONTENTS

SAFETY RULES ..................................................................................................................................................................................................... 4

IDENTIFICATION OF MACHINES ....................................................................................................................................................................... 5

CLASS DESCRIPTION ........................................................................................................................................................................................ 5

STYLE OF MACHINES ......................................................................................................................................................................................... 5

STYLE OF MACHINES (CONT.) .......................................................................................................................................................................... 6

ILLUSTRATIONS ................................................................................................................................................................................................... 6

IDENTIFYING PARTS ........................................................................................................................................................................................... 6

TERMS ................................................................................................................................................................................................................. 6

THREADING & OILING FOR PLAIN FEED .......................................................................................................................................................... 7

THREADING & OILING FOR DIFFERENTIAL FEED ............................................................................................................................................. 8

NEEDLES ............................................................................................................................................................................................................. 9

LUBRICATION ..................................................................................................................................................................................................... 9

THREADING........................................................................................................................................................................................................ 9

ADJUSTING INSTRUCTIONS ............................................................................................................................................................................... 9

TORQUE REQUIREMENTS .................................................................................................................................................................................. 9

SYNCHRONIZING NEEDLE AND LOOPER MOTIONS .................................................................................................................................... 10

TIGHTENING NEEDLE HEAD ............................................................................................................................................................................ 11

ALIGNING NEEDLES IN THROAT PLATE SLOTS .............................................................................................................................................. 11

CENTERING THE CYLINDER............................................................................................................................................................................. 11

SETTING THE LOOPER ...................................................................................................................................................................................... 11

SETTING THE LOOPER AVOID PLAIN FEED..................................................................................................................................................... 12

SETTING HEIGHT OF NEEDLE BAR ................................................................................................................................................................... 12

SETTING THE FEED DOGS FOR PLAIN FEED ................................................................................................................................................... 12

SETTING THE FEED DOGS FOR DIFFERENTIAL FEED....................................................................................................................................... 12

SETTING THE FEED DOGS FOR DIFFERENTIAL FEED (CONT.)........................................................................................................................ 13

CHANGING STITCH LENGTH .......................................................................................................................................................................... 13

SETTING REAR NEEDLE GUARD ...................................................................................................................................................................... 13

PRESSER FOOT AND PRESSER BAR ADJUSTMENT ......................................................................................................................................... 14

UPPER FEED ROLLER ADJUSTMENT ................................................................................................................................................................ 14

UPPER FEED ROLLER ADJUSTMENT (CONT.) ................................................................................................................................................. 15

THREAD TENSION AND RELEASE

DIFFERENTIAL CONTROL ................................................................................................................................................................................. 15

SETTING NEEDLE THREAD TAKE-UP AND FRAME EYELET .............................................................................................................................. 16

LOOPER THREAD TAKE-UP ADJUSTMENT ...................................................................................................................................................... 16

FOLDER ADJUSTMENT ..................................................................................................................................................................................... 17

AIR BLOWER TUBE ADJUSTMENT .................................................................................................................................................................... 17

PULLER ADJUSTMENTS.................................................................................................................................................................................... 17

PNEUMATIC ADJUSTMENTS ............................................................................................................................................................................ 18

ADJUSTING STOP COLLAR ON FEED ROLLER FOR PNEUMATIC MACHINES ............................................................................................. 19

MAIN FRAME, CAST-OFF PLATE, EYELETS, MISCELLANEOUS COVERS AND BUSHINGS........................................................................... 21

MAIN FRAME, CAST-OFF PLATE, EYELETS, MISCELLANEOUS COVERS AND BUSHINGS (CONT.)............................................................. 23

CYLINDER COVERS AND BUSHINGS FOR PLAIN FEED ................................................................................................................................. 25

CYLINDER COVERS AND BUSHINGS FOR PLAIN FEED (CONT.) .................................................................................................................. 27

CYLINDER COVERS AND BUSHINGS FOR DIFFERENTIAL FEED .................................................................................................................... 29

CYLINDER COVERS AND BUSHINGS FOR DIFFERENTIAL FEED (CONT.) ..................................................................................................... 31

DETACHABLE HEAD ASSEMBLY...................................................................................................................................................................... 33

OILING, NEEDLE LEVER, CRANKSHAFT AND MAIN SHAFT PARTS FOR PLAIN FEED ................................................................................... 35

OILING, NEEDLE LEVER, CRANKSHAFT AND MAIN SHAFT PARTS FOR DIFFERENTIAL FEED ...................................................................... 37

PLAIN FEED BAR, FEED LIFT & FEED DRIVE COMPONENTS FOR PLAIN FEED.............................................................................................. 39

DIFFERENTIAL FEED BAR, MAIN FEED BAR, FEED LIFT ECCENTRIC ASSEMBLY FOR DIFFERENTIAL FEED................................................... 41

FEED DRIVE COMPONENTS, LOOPER DRIVE COMPONENTS AND LOOPERS FOR PLAIN FEED............................................................... 43

LOOPERS, LOOPER HOLDERS, FEED DRIVE COMPONENTS AND LOOPER AVOID COMPONENTS FOR DIFFERENTIAL FEED ........................... 45

UPPER ROLLER FEED, FOOT LIFTER AND THREAD TENSION PARTS ............................................................................................................ 47

UPPER ROLLER FEED, FOOT LIFTER AND THREAD TENSION PARTS (CONT.) .............................................................................................. 49

REAR ROLLER & PRESSER FOOT PNEUMATIC COMPONENTS & TREADLE SWITCH ................................................................................... 51

PULLER DRIVE ASSEMBLY ................................................................................................................................................................................

PULLER BRAKE ASSEMBLY ............................................................................................................................................................................... 55

SEWING PARTS FOR PLAIN FEED .................................................................................................................................................................... 57

SEWING PARTS FOR DIFFERENTIAL FEED ....................................................................................................................................................... 59

THREAD STAND ................................................................................................................................................................................................ 61

ACCESSORIES .................................................................................................................................................................................................. 62

NUMERICAL INDEX OF PARTS ........................................................................................................................................................................ 63

NUMERICAL INDEX OF PARTS ........................................................................................................................................................................ 64

NUMERICAL INDEX OF PARTS ........................................................................................................................................................................ 65

NOTES ............................................................................................................................................................................................................... 66

NOTES ............................................................................................................................................................................................................... 67

.................................................................................................................................................................... 15

53

3

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 disconnect-
ing from compressed air supply (i.e. pneumatic equipment with air tank), the pressure has to be
removed by bleeding.

4

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 in the casting at the right rear base of the machine.

CLASS DESCRIPTION

High Speed, Feed-Off-The-Arm High Throw Machines, Two and Three Needle, Left Needle In Front. Light Weight
Presser Bar Mechanism, Adjustable Looper Avoid, Space in Front of Needles 8" (203.2 mm), Single Disc Looper
Thread Take-Up, Automatic Enclosed Type Oiling System and Filter Type Oil Pump, Visual Sight Oil Action and
Supply Gauges, .588" [19/32", 15.1mm] wide roller.

STYLE OF MACHINES

35800BLWG9 DOUBLE LAP SEAM. Three needle, high capacity, differential feed with low lift feed

eccentric and upper driven roller feed. -Typical Application- For in seams on
medium weight denim garments. Seam Specification 401 LSc-3. Standard gauge
Number 9 [9/64", 3.6mm]. Recommended needle 130GS, size 125/049. Maximum
recommended speed 4500 R.P.M.. .040 step sewing parts.

35800BQWG9 DOUBLE LAP SEAM. Three needle high capacity, plain feed, upper driven, roller feed. -

Typical Application- For in and out seams on medium weight denim garments. Seam
Specification 401 LSc-3. Standard gauge Number 9 [9/64", 3.6mm]. Recommended needle
130GS, size 125/049. Maximum recommended speed 4500 R.P.M.. .040 step sewing parts.

35800BWWG8, 9 DOUBLE LAP SEAM. Two and three needle, high capacity, differential feed, high lift feed

eccentric, with upper driven, roller feed. Feed Dogs have higher teeth on front. - Typical
Application- For in and out seaming on heavy weight denim garments. Seam Specifications
401 LSc-2 or 401 LSc-3. Standard gauge Numbers 8 [1/8", 3.2mm], 9 [9/64", 3.6mm].

Recommended needle 130GS, size 140/054. Maximum recommended speed 4500 R.P.M..
.094 step sewing parts.
NOTE: 18 gauge available with two needles only.

35800BWWPG8, 9 Same as 35800BWWG except presser and roller bars are equipped with double acting air

cylinders. Air is used to supply down pressure and lift for presser foot and roller assembly.

35800BWDNG8, 9 Lower differential feed high step throat plate, wide presser foot with seam groove feed dogs

flat front to back belt-driven, wide steel teeth feed roller.

35800BWDRG8, 9 Plain feed high step throat plate wide presser foot with seam groove raised front teeth on

feed dogs belt-driven, wide steel teeth feed roller.

5

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.

9. 29126 EC Upper Looper Drive Shaft Assembly ................................................................................ 1

10. 22503 F Screw ............................................................................................................................. 1

11. 39543 E Cam Follower Locking Clamp ......................................................................................... 1

It will be noted in the previous example that the cam follower, bushing and cam guide and the upper looper drive shaft
are not listed. The reason is that replacement of these parts individually is not recommended, so the complete upper looper
drive shaft assembly should be ordered.

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.

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 the construction permits, each part is marked with its part number. On some of the smaller parts and on those where
construction does not permit, an identification letter is marked 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.

TERMS

Prices are net cash and subject to change without notice. All shipments are forwarded F.O.B. shipping point.
A charge is made to cover postage and insurance.

6

THREADING & OILING FOR PLAIN FEED

FIG. 1

7

THREADING & OILING FOR DIFFERENTIAL FEED

FIG. 1

8

Needle Type Description Sizes Available

,

130GS

Short double groove, struck groove, ball eye, spotted,
government point, chromium plated.

Table I

080/032, 090/036, 100/040, 110/044, 125/049

140/054, 150/060

NEEDLES

Selection of proper needle size is determined by size of thread used. Thread should pass freely through the
needle eye in order to produce a good stitch formation.

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 largest diameter
of blade, measured midway between shank and eye. Collectively, type and size number represent the
complete symbol which is given on the label of all needles packaged and sold by UNION SPECIAL. See "STYLE
OF MACHINES" for the standard recommended needle type & size for your machine.

To have needle orders promptly and accurately filled, an empty package, a sample needle, or the type and
size number should be forwarded. Use the description on the label. A complete order would read: “1000
Needles, Type 130GS, Size 140/054”.

LUBRICATION

The oil has been drained from the machine before shipping and the reservoirs must be filled before
beginning to operate. Use a straight mineral oil with a Saybolt viscosity of 90 to 125 seconds at 100°
Fahrenheit. Union Special Part No. 28604R.

Oil is filled at oil caps (A & D, Fig. 1). The level is checked at sight gauges (B) and (E). Maintain the oil level
between the red lines of the gauges.

The machine is equipped with a continuous running rotary driven oil pump. The action of the oil can be
observed through oil sight (A) and (D) in the front and back top covers.

When starting a new machine, filling the reservoirs or when beginning to operate a machine that has been
idle for some time, it may be necessary to prime the pump. To do this, remove the two plug screws (C). Apply
oil to these holes and operate machine until bubbling can be observed at the windows. Replace screws (C).

CAUTION: If oil does not bubble when machine is running, the circulating pump is inoperative.
Oil may be drained from the machine at two places, plug screw (F) located in the bottom of the cylinder

and plug screw (G) at the back of the main frame below the handwheel.

THREADING

A convenient means for threading the looper has been provided. When loopers are at the left end of their
travel, press the knob (H, Fig. 1) and loopers will back out of position, leaving them easily accessible. Thread
the machine as illustrated in (Fig. 1). After threading, push loopers back into position.

ADJUSTING INSTRUCTIONS

NOTE: Instructions stating direction of location, such as right, left, front or rear of machine, are given

relative to operator’s position at the machine. The handwheel rotates counterclockwise, in
operating direction; when viewed from the right end of machine.

TORQUE REQUIREMENTS

Torque specifications given in this catalog are measured in inch-pounds or Newton-meters. All straps and
eccentrics must be tightened to 19-21 in. lbs. (2.1-2.3Nm) unless otherwise noted. All nuts, bolts, screws, etc.,
without torque specifications must be secured as tightly as possible, unless otherwise noted. Special torque
specifications for connecting rods, links, screws etc., are shown on the parts illustrations.

9

B

FIG. 2

SYNCHRONIZING NEEDLE AND LOOPER MOTIONS

NOTE: Needle and looper mechanisms are carefully synchronized with
precision gauges before leaving the factory to insure the best possible
sewing conditions.

Should it become necessary to disassemble the main shaft or replace
components of the needle or looper drive mechanisms, re-synchroniza-
tion of the machine will be required to facilitate proper sewing adjust-
ments. This is accomplished by means of an adjustable split coupling
located beneath the rear top cover, connecting the crankshaft to the
main shaft, which in turn drives the looper mechanism.

To synchronize the machine, remove the needles, presser foot, throat

C

E

D

A

plate, feed dogs and upper feed roller mechanism. Rotate handwheel in
the operating direction until the needle bar is at the bottom of its stroke
and just begins its upward travel. Loosen screw (A, Fig. 2) and remove the
looper for the left hand needle from the looper holder. Insert a straight
steel rod (B) 5/32" (3.9mm) or 11/64" (4.3mm) diameter by 2-1/2" (63.5mm)
long into looper holder and retighten screw (A). It may be necessary to
reposition the looper holder so that the rod (B) will be in a vertical position
when at its farthest travel to the right. Rotate the handwheel until the rod
is at extreme left, reinstall the throat plate. Turn the handwheel in the
operating direction, with needle bar rising until rod (B) comes in contact
with the edge of the throat plate. At this point, clamp Union Special timing
gauge TT147 (C) around the needle bar (D), flush against the underside
of the machine casting (E). Rotate handwheel in the opposite direction
until either the gauge contacts the machine casting on the up stroke of
the needle bar or the rod contacts the edge of the throat plate. Maximum
allowable clearance between gauge and casting or rod and throat plate
is .005" (0.1mm)

If machine is not synchronized the following applies:

C

A

B

FIG. 3

operating direction. Use shim stock to insure no more than .005" (0.1mm) exists between gauge and casting or
between rod and throat plate, in both the operating and reverse directions of the handwheel. When this setting
has been made, tighten the three horizontal clamp screws (B, Fig. 3) securely, and recheck both clearance points
with .005" (0.1mm) shim gauge to assure no slippage occurred while tightening the screws.

Both ends of the adjustable split coupling are secured to the crankshaft
and main shaft by spot screws and set screws. On the main shaft end of
the coupling (A, Fig. 3) three screws (B) thread horizontally through the
coupling. The holes in the main shaft end of the coupling are larger than
the diameter of the screws, permitting several degrees of rotation in either
direction to properly synchronize the needle and looper. Loosen the three
horizontal clamp screws (B, Fig. 3). With rod (B, Fig. 2) at its farthest position
to the left, snug the uppermost horizontal clamp screw enough to hold
coupling (A, Fig. 3) in position. If the handwheel is turned in reverse of
operating direction and gauge (C, Fig. 2) on needle bar (D) contacts the
machine casting (E) before rod (B) contacts the edge of the throat plate,
loosen horizontal clamp screw (B, Fig. 3) which was snug, while holding the
coupling in place with an Allen wrench in set screw (C). Rotate the
handwheel slightly in reverse of operating direction, snug the uppermost
horizontal clamp screw (B), recheck synchronization. If the handwheel
is turned in reverse of operating direction and the rod contacts the edge
of the throat plate before the clamp gauge contacts the machine
casting, adjust as before, except turn the handwheel slightly in the

10

TIGHTENING NEEDLE HEAD

When replacement of the needle bar, and or needle head is neces-
sary, torque the needle head to needle bar 14-16 in. lbs. (1.6-1.8Nm)
or use torque rod No. 21227AR that has been supplied with the
machine, for the purpose of eliminating the possibility of distorting
the needle bar due to overtightening. Insert the torque rod in the
hole at the upper end of the needle bar, while holding the needle
bar head with a suitable tool, turn the needle bar with the torque rod
onto the needle bar head. When the rod starts to bend, the needle
bar head has been threaded into the needle bar properly.

A

B

ALIGNING NEEDLES IN THROAT PLATE SLOTS

Insert a new set of needles, type and size specified, with screw (B, Fig.

4) slightly loosened, lower needle bar (A) and turn needle head as
required until the needles are centered in the throat plate needle
hole slots. Tighten screw (B) torque to 19-21in.lbs. (2.1-2.4Nm).

NOTE: If the needles can not be aligned in the throat plate slots, the

lower cylinder must be moved as stated below.

CENTERING THE CYLINDER

Remove the top front cover and gasket from the main frame. Loosen
cylinder holding screw (A, Fig. 5). Turn eccentric screw (B) clockwise
or counterclockwise to move the cylinder so the needles are
centered in the needle holes. Tighten screw (A) and recheck set-
tings.

NOTE: The cylinder may not move freely when the eccentric is

turned because the joint sealant compound has set.

SETTING THE LOOPER

Insert a new set of needles, type and size specified. Always adjust the
looper (A, Fig. 6) for the left needle first. Set the looper so that the
distance from the center of the needle (B) to the point of the looper
(A) is 9/64" (3.6mm) when the looper is at its farthest position to the
left. Looper gauge (C) No. 21225-9/64 can be used advantageously
in making this adjustment. If adjustment is required, loosen screw (A,
Fig. 7) in looper holder, permitting movement in either direction to
attain the 9/64" (3.6mm) dimension as shown in Fig. 6. Retighten
screw (A, Fig. 7). Repeat for other needles and loopers.

Rotate handwheel in operating direction to assure that the looper
point passes to the rear of the needle to touch but not to deflect the
needle. This adjustment can be made by loosening screw (A, Fig. 7)
in looper holder. Looper holder can be moved front to back to
attain looper to needle setting. Always check the 9/64" (3.6mm)
looper gauge setting after setting the looper to the back of the
needle, and conversely, always check the setting of the looper to
the back of the needle after setting the 9/64" (3.6mm) looper gauge.

FIG. 4

FIG. 5

B

9/64"
(3.6mm)

A

C

FIG. 6

Descending Needles

Looper Blade

Lower 1/3

The amount of looper avoid has been set at the factory to .110"
(2.8mm). If it becomes necessary to adjust the amount of avoid it is
recomended as a starting point, to have the points of the descend-
ing needles contact the back of the lower 1/3 of the back of the
looper blade. (See Fig. 7).

11

A

FIG. 7

SETTING THE LOOPER AVOID PLAIN FEED

If more or less looper avoid motion is required, remove cylinder
side cover (A, fig 8) located at the lower front left side. For Plain
feed use a screwdriver to loosen looper avoid link ball joint (B,
fig 8) (for differential feed use TT-5 wrench to loosen looper avoid
link screw C, fig 8). Moving ball joint down in the lever slot
increases the amount of looper avoid motion, moving it up acts
the reverse. Retighten ball joint B, Plain feed (screw C, differen-
tial feed) securely.

NOTE: Whenever looper avoid is changed looper clearance to

needle must also be reset.

FIG. 8

TORQUE:

19 - 21 in. lbs.

(2.1 - 2.4 Nm)

B

A

1/16" (1.6mm)

The height of the needle bar is correct when the top of the
needle eye is 1/16" (1.6mm) below the underside of the looper,
with the looper point even with the right side of the needle. To
make adjustment loosen screw (A, Fig. 9) and move needle bar
(B) as required to attain dimension.

NOTE: Care must be taken not to disturb the alignment of the

SETTING HEIGHT OF NEEDLE BAR

needles when moving the needle bar either up or down.

SETTING THE FEED DOGS FOR PLAIN FEED

Assemble the main feed dog and throat plate. Main feed dog
(A, Fig. 11) at its highest position, should be set to project above
the throat plate, slightly more than the depth of its teeth for Style

FIG. 9

35800BQWG. The feed dog mounting screw (B) and front sup-
port screw (C) should be set to maintain this setting.

Plain Feed

FIG. 10

B

The feed should be set so there is equal clearance between the

B

A

C

D

front of the feed dog and the front of the feed slot in the throat
plate when the feed dog is at its most forward travel. The same
amount of clearance should be between the back of the feed
dog and the back of the feed slot in the throat plate when the
feed dog is at its most rearward travel. To attain this setting
loosen screws (A and B, Fig. 10) and remove plug screw (D). Using
a screw driver turn eccentric pin (C) clockwise or counterclock-
wise to obtain proper setting. Tighten screws (A and B), reinstall
plug screw (D).

SETTING THE FEED DOGS FOR DIFFERENTIAL FEED

Before assembling the main and differential feed dogs, set the
feed bar eccentric pin (A, Fig. 10A) located in the left side near
center of cylinder, so that the slot in the head is in a horizontal

position for the 35800BWDNG, BLWG style machines and turned
counter clockwise to an approximate 45° for the 35800BWWG
style of machine. The pin can be used to slightly tilt both feed
dogs if necessary. The feed bar pin is retained in position by set
screw (B). Assemble differential feed dog (A, Fig. 11A), main
feed dog (B) and throat plate. Both the main and differential
feed dogs can be individually adjusted to height. Main feed dog
(B) at its highest position, should be set to project above the
throat plate, the depth of its teeth. If adjustment is necessary
loosen screw (D) and move feed dog (B) up or down to attain
correct setting. Feed dog support (C) should support front of
feed dog.

C

D

E

A

Differential Feed

FIG. 10A

NOTE: If eccentric pin (A, Fig. 10A) is used to tilt the feed dogs,

make sure that the looper does not interfere with the rear
needle guard and that the needle guard does not pinch
the needle loops on the back side of the needles.

12

SETTING THE FEED DOGS FOR DIFFERENTIAL FEED

(CONT.)

If adjustment is necessary loosen screw (E, Fig. 11A) in feed
dog support (C) and move as required. Retighten screw (E).
The differential feed dog (A) may then be leveled with main
feed dog (B). If adjustment is necessary loosen screw (F) and
move feed dog up or down as required. Retighten screw (F).

C

A

NOTE: Should the main feed dog require repositioning due

to contact with the throat plate in its forward or
rearward travel, loosen set screw (C, Fig. 10A) in
main feed bar driving link (D), rotate main feed bar
eccentric driving stud (E) as required. Driving stud
(E) has a thin hexagon head with cutouts on two of
the flats allowing movement by tapping with a sharp
pointed tool, when wrench 21388AZ is not available.
Whenever the main feed bar eccentric driving stud
position has been changed, recheck rear needle
guard setting, adjustment may be required. Retighten
set screw (C). Position main feed dog support (C,
Fig. 11A) flush against bottom of main feed dog (B),
tighten support screw (E) securely.

CHANGING STITCH LENGTH

When change in stitch length is required, remove large plug
screw (A, Fig. 12). Loosen feed rocker driving link screw (B) in lever
(C). Moving the feed rocker driving link up in the lever slot
lengthens the stitch, moving it down, shortens the stitch. Re-
tighten link screw (B) securely and replace plug screw (A).

NOTE: If plug screw (A) is replaced with a new plug screw,it

should be sealed with a silicone seal.

B

Plain Feed

FIG. 11

A

C

B

E

D

Differential Feed

F

FIG. 11A

Any stitch length change, requires resetting the needle
guard.

CAUTION: When making stitch length adjustment do not

exceed maximum recomended stitch length
due to possible part damage.

SETTING REAR NEEDLE GUARD

Set the rear needle guard (A, Fig. 13) horizontally so that it
barely contacts needles (B) when at its extreme forward posi-
tion. If adjustment is necessary loosen screw (E) and move
guard front to back as required. It should be set vertically as
low as possible, yet have its guarding surface in contact with
the needles until the points of the loopers (C), moving to the
right, are even with the right side of the needles. If adjustment
is necessary loosen screw (F) and move guard and holder up or
down as required.

CAUTION: If stitch length is changed, needle guard must be

reset.

NOTE: When installing the needle it should be parallel with

the eye in line of feed. If adjustment is necessary,
loosen screw (N, Fig. 15) in needle head and rotate
needle to attain adjustment (D, Fig. 13).

FIG. 12

FIG. 13

13

C

FIG. 14

K

J

1/32" (.8mm)

PRESSER FOOT AND PRESSER BAR ADJUSTMENT

Adjusting or Replacing Presser Foot:
Remove presser bar knob (A, Fig. 14) and spring (B). Loosen screw

(A, Fig. 15) on presser bar guide (B). (Loosen screws (C) in upper stop
collar for pneumatic machines only). Slide presser bar upward high
enough to slip on presser foot yoke (E) with foot attached and
tighten screw (F) on flat of presser bar. Position foot so that the
needle holes in the foot line up with the holes in the throat plate.
Tighten screw (A)

Presser foot guide plates(G, Fig. 15) should be set so that entire
presser foot and bar assembly has free movement up and down
with no left to right movement.

With foot properly aligned on throat plate and presser bar guide (B)

securely fastened to presser bar, adjust both guide plates (G) to
obtain above setting. Tighten four screws (H).

M

Reinstall presser bar spring (B, Fig. 14) and knob (A), with presser foot
resting on throat plate.

For pneumatic machines:

G

H

A

B

Q

N

F
E

L

FIG. 15

Set upper stop collar (K) to contact casting, so the bottom of the
needle head and the top of the presser foot do not touch, at the
bottom of the needle stroke when lifting foot. Tighten screw (C).

The presser foot should be adjusted to be 1/8" (3.17mm) above the
throat plate before the feed roller mechanism begins to rise.
Loosen screw (A, Fig. 15) in presser bar lifter and guide (B, Fig. 15),
raise or lower guide as required to attain the specified point at
which the feed roller begins to rise. Retighten screw (A) and
maintain needle settings.

NOTE: There should be a minimum 1/32" (0.8mm) clearance

between screw (M, Fig. 15) and the bottom of the slot in link
(J).

Regulate the pressure on the presser foot by turning the presser spring
regulating knob (A, Fig. 14) located on top of pressure foot spring (B)..

To remove just the presser foot, remove screws (L, Fig. 15) and replace
foot, retighten screws (L).

UPPER FEED ROLLER ADJUSTMENT

C

Assembly of Roller to Roller Yoke:
Assemble driven gear (A, Fig.16) through feed roller frame

D

E

B

H

A

F

G

(B). Place woodruff key (C) into slot of feed roller shaft (D).
Slide driven gear (E) on to shaft (D), make sure key (C)
goes into slot in gear (E). While holding feed roller frame
(B) with steel roller (F) between the two frame lobs, slide
feed roller shaft (D) and assembled components through
frame. Make sure that shoulder of roller (F) is to the right.
Align screw (G) (first in operating direction on roller) on
the flat of shaft (E). At the same time thrust shoulder of
shaft (D) against face of gear (E), make sure left edge of
roller is against right (inside) face of left lob. Secure screw
(G) on flat of shaft (D) and tighten screw (H).

FIG. 16

14

UPPER FEED ROLLER ADJUSTMENT (CONT.)

When feed roller mechanism (C, Fig. 17) has been re-
moved or replaced, .003" (0.08mm) minimum to .005"
(0.13mm) maximum clearance should be maintained
between roller and throat plate.

To Adjust Guiding System for Roller:
Loosen two screws (A). Using shim(s) adjust feed roller

mechanism (C) so that the roller is .003" (0.08mm) to .005"
(0.13mm) above throat plate. Slide rear guide finger (B)
down so that it sits on top of rear guide support block (D).
Check to make sure roller is parallel to throat plate slots.
Tighten two screws (A) to secure feed roller mechanism in
place.

Setting Pressure for Feed Roller:
Regulate the pressure on the feed roller so that it exerts

only enough pressure on the fabric to feed the work
uniformly. Turning roller presser spring regulator (H, Fig.

17) clockwise to increase or counterclockwise to de-

crease the pressure.
Setting of Feed Roller:
Guide finger for roller should be set so that entire roller

mechanism has free movement up and down with no left
to right movement. With roller properly aligned, the edge
of roller should be parallel with feed slots in throat plate.

Guide plates (F) must be thrusted against guide finger (B)
to secure feed roller mechanism (C). Thrust guide plates
(F) against guide finger (B) with equal pressure. Tighten
four screws (E) to hold plates in place.

THREAD TENSION AND RELEASE

The thread tension release is set correctly when it begins to
function at the point when the upper feed roller begins to rise.
When adjustment is necessary, loosen screw (B, Fig. 18) in lifter
lever (C). Facing the tension release shaft (A) from the right
end of the machine, insert screwdriver in slot in shaft (A). Turn
the screwdriver clockwise to raise pins (D) or counterclock-
wise to lower pins. Retighten screw (B).

DIFFERENTIAL CONTROL

The amount of differential is controlled by lever (A, Fig. 19).
The adjusting plate is numbered from 1 to 9. When the lever
is set from numbers 1 to 4 reverse differential or stretching
occurs. The numbers from 4 to 5 produce equal feed stitching
while numbers 5 to 9 produce a gathering stitch. Screws (B)
can be set to limit the movement of lever (A) or lock lever in
one position. If top ply of material is coming out long, move
lever toward operator, if top ply is short, move lever away
from operator, as required.

FIG. 17

FIG. 18

A

B

B

15

FIG. 19

SETTING NEEDLE THREAD TAKE-UP AND FRAME EYELET

With the needle bar at the top of its stroke set the adjustable

B

A

C

frame needle thread eyelet (A, Fig. 20) in the lower mounting
hole of eyelet (B) so the needle thread from eyelet (A) to the
needle lever thread eyelet (C) will be in a straight line. If
adjustment of eyelet (A) is necessary loosen screw (K) and
move eyelet up or down as required. Retighten screw (K).

H

D

K

D

1/16"

C

(1.6mm)

With the needle bar at the bottom of its stroke, the needle
thread take-up (D) should be set so that it is 1/16" (1.6mm)
above the edge of the needle lever thread eyelet (C) (See
Inset). If adjustment is necessary loosen screw (H) and adjust
lever (D) as required to attain 1/16". Tighten screw (H).

LOOPER THREAD TAKE-UP ADJUSTMENT

FIG. 20

C

B

A

With the machine rotating in operating direction the looper

thread take-up is in time when the first screw coming into
view (A, Fig. 21) is in line with the spot screw (B) on the main
shaft in the pulley. NOTE: screw (A) is accessable through the
hole in the take-up. With this setting correct, the looper
thread should cast-off of the take-up (C) when the needles
are safely in the triangle. If adjustment is necessary loosen
two screws (A) in take-up (C) position screws in line with spot
screw (B). Tighten screws (A).

NOTE: Make sure take-up cam is centered left to right in
cast-off slot.

FIG. 21

16

FOLDER ADJUSTMENT

Slide folder (A, Fig. 22) on arm. The folder should be as close to
the front of presser foot (B) as possible, making sure to avoid the
presser foot contacting the folder when sewing across seams. If
adjustment is necessary loosen screws (C) to move entire folder
left to right or front to back as required. If just adjustment of
upper scroll (D) is needed loosen screw (E) and position scroll to
obtain proper seam margin.

AIR BLOWER TUBE ADJUSTMENT

The air blower tube should be set left to right so it is parallel with
the throat plate. It should be set front to back so when feeding
over a cross seam the presser foot does not contact the tube. If
adjustment is necessary, loosen screw (A, Fig. 23) and position
air blower tube (B) as required. Retighten screw (A).

FIG. 22

PULLER ADJUSTMENTS

Timing of the Puller Mechanism:
Loosen two screws (A, Fig. 24) in upper sprocket, rotate machine

in operating direction, with needle moving up until needle
points are flush with top of throat plate (B). At this point, feed
dogs are above throat plate but have not made any movement
towards the rear. Rotate puller shaft (C) in operating direction
until puller (D) shows some movement clockwise. At this time
tighten two screws (A) in upper sprocket.

Setting Travel of Puller (stitch length):
Loosen nut (E, Fig. 24) and turn screw (F) clockwise to

shorten puller travel or counterclockwise to lengthen
puller travel. Tighten nut (E). Sewing sample should be
checked to assure that proper stitch length is obtained.

A

B

FIG. 23

17

FIG. 24

PNEUMATIC ADJUSTMENTS

Pneumatic settings can vary between different sewing applications. For best results set all air lines and air
pressure settings as in (Fig. 25).

If air lines are disconnected follow connection as in (Fig. 25).
Air pressure settings should be set with air regulators as shown in (Fig. 26).
Air lines should be attached with each end of line to corresponding letter (Fig. 25).

18

ADJUSTING STOP COLLAR ON FEED ROLLER

FOR PNEUMATIC MACHINES

When feed roller machanism (A, Fig. 27) and/or puller shaft cylinder assembly (B, Fig. 27) has been
removed or replaced, 1/64" (0.4mm) clearance should be maintained between upper connection (C,
Fig. 27) and floating feed roller connection (D, Fig. 27) when feed roller mechanism is in up position.

Turn off air supply to puller shaft air cylinder assembly (B, Fig. 27). Loosen screw (E, Fig. 27). Lift
feed roller mechanism (A, Fig. 27) until there is 1/64" (0.4mm) clearance between upper connection (C,
Fig. 27) and floating feed roller connection (D, Fig. 27). Slide roller stop collar (F, Fig. 27) and rubber
washer (H, Fig. 27) up until they contact the underside of head assembly (G, Fig. 27). Retighten screw
(E, Fig. 27).

Fig. 27

19

20

MAIN FRAME, CAST-OFF PLATE, EYELETS, MISCELLANEOUS COVERS AND BUSHINGS

Ref.

No.

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

24.

25.

26.

27.

28.

29.

30.

31.

32.

33.

34.

35.

36.

37.

38.

Part No.

35888T
93
35888N
660-212
B3530555000
22516A
35887AE
B3530555000
660-212
22516A
35853Z
35887AG
22730
73A
35772S
35772T
36204B
22733B
660-206
22711
6042A
22759A
36293F
36293B
90
93A
35887X
22564B
35887R
93
35893H
35893G
12934A
41071G
35887M
35853Y
35853AA
35853W

Description

Gasket ........................................................................................................

Screw ..........................................................................................................

Crank Chamber Cover ...............................................................................

"O" Ring .................................................................................................

Oil Sight Gauge .....................................................................................

Screw ..........................................................................................................

Top Cover, front ..........................................................................................

Oil Sight Gauge .....................................................................................

"O" Ring .................................................................................................

Screw ..........................................................................................................

Looper Throw-Out Plunger Knob .................................................................

Gasket ........................................................................................................

Screw ..........................................................................................................

Screw ..........................................................................................................

Cast-Off Plate Eyelet, rear ..........................................................................

Cast-Off Plate Eyelet, front .........................................................................

Cast-Off Plate .............................................................................................

Oil Drain Screw ............................................................................................

"O" Ring .......................................................................................................

Screw, for oil wick ........................................................................................

Washer ........................................................................................................

Screw ..........................................................................................................

Oil Sight Gauge Indicator Assembly ............................................................

Oil Sight Gauge ...........................................................................................

Screw ..........................................................................................................

Screw ..........................................................................................................

Top Cover, middle .......................................................................................

Screw ..........................................................................................................

Middle Top Cover Hinge .............................................................................

Screw, for rotary pump housing ..................................................................

Seal, Lower ..................................................................................................

Seal, Upper .................................................................................................

Nut ..............................................................................................................

Nut ..............................................................................................................

Spring, top cover .........................................................................................

Looper Throw-Out Plunger Spring ...............................................................

Looper Throw-Out Bushing ..........................................................................

Looper Throw-Out Plunger ..........................................................................

Amt.
Req.

1
5
1
1
1
4
1
1
1
6
1
1
2
2
1
1
1
1
1
1
2
2
1
1
2
2
1
3
1
2
1
1
2
2
1
1
1
1

39. thru 75. See following page.

21