UnionSpecial 51300 Series Instruction sheet

FINEST QUALITY
STYLES
51300KK
51300 KL
CATALOG
N0.266
®
INDUSTRIAL
SEWING
LEWIS • COLUMBIA
MACHINES
CLASS 51300
STREAMLINED
DOUBLE LOCKED STITCH MACHINES
WITH
THREAD UNDERTRIMMER
CHICAGO
From the library of: Superior Sewing Machine & Supply LLC

From the library of: Superior Sewing Machine & Supply LLC

Catalog No. 266
( S up p 1e m e n t t o C a t a 1o g No • 249 )
INSTRUCTIONS
FOR
ADJUSTING AND OPERATING
LIST OF PARTS
CLASS 51300
Streamlined Lockstitch
Styles
51300 KK
51300 KL
First Edition
Copyright 1970
by
Union Special Machine Co.
Rights Reserved in All Countries
MACHINE COMPANY
INDUSTRIAL SEWING MACHINES
CHICAGO
Jp.nuary 1970
From the library of: Superior Sewing Machine & Supply LLC

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From the library of: Superior Sewing Machine & Supply LLC

IDENTIFICATION OF MACHINES
Each Union Special machine is identified by a Style number which is stamped into
the name plate on the machine. Style numbers are classified as standard and special.
Standard Style numbers have one or more letters suffixed, but never contain the letter
"Z". Example: "Style 51300 KK". SpecialStylenumberscontaintheletter"Z". When
only minor changes are made in a standard machine. a "z" is suffixed to the Standard
Style number. Example: "Style 51300 KKZ".
Styles of machines similar in construction are grouped under a class number
which differs from the style number, in that it contains no letters. Example: "51300".
APPLICATION OF CATALOG
This catalog is a supplement to Catalog No. 249 and should be used in con-
junction therewith. Only those parts which are used on Styles 51300 KK and KL but
not used on Styles 51300 CC,CD areillustratedandlistedat the back of this book. For
clarity. certain51300 CC,CD parts are showninphantomto help locatethe 51300 KK
and KL parts.
NOTE: When ordering repair parts always use the part number listed in the second
column.
Opposite the illustration page. parts are identified by detail number. part number.
description, and amount required.
Adjusting and operating instructions for Styles 51300 KK and KL are similar to
those in Catalog No. 249 for Styles 51300 CC.CD respectively. The only instructions
included in this catalog are the ones that are different from Styles 51300 cc, CD or
are additional instructions that pertain specifically to Styles 51300 KK and KL.
The catalog applies specifically to the Standard Styles of machines as listed
herein. It can also be applied with discretion to some Special Styles of machines
in this class. Reference to direction. such as right, left, front. back, etc .• are
given from the operator's position while seated at the machine. Operating direction
of handwheel is toward the operator.
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Adjuttinl Instructions
Description of Machines
Streamlined Flat Bed. Single Needle Medium Duty Machine with "KLIPP- IT" (under-
trimmer) for use with Needle Positioner. Enclosed Oiling System. Reverse
Feed and Back- Tacking Mechanism. Needle Bearing Needle Bar Drive, Light
Weight Presser Bar and Light Weight Needle Bar Mechanism, Equipped with
Light Weight Handwheel, Oil Pan Assembly and Head Oil Siphon Assembly.
51300 KK For seaming and hemming dresses, skirts. shirts, towels, sheets.
curtains and similar operations on light to medium weight woven material where
controlled back tacking is required.
51300 KL For seaming pants, dresses, skirts; for hemming shirts, towels, curtains
and similar operations on medium weight woven materials where controlled
back-tacking is required.
NEEDLE LEVER STUD
Check the location of the needle lever stud with respect to the oil groove. The head
of the needle lever stud is marked with an arrow and the word
11
up
11
• These studs are
set correctly when the arrow points vertically up. Also, check the position of the oil
tube inside the arm casting which lubricates the needle lever stud. Make sure that it
is tilted downwards and that its delivery end contacts the wall of the bed casting just
above the notch in the needle lever thrust collar.
Do not allow the oil tube to rest on the needle lever.
LUBRICATION
Clean the machine thoroughly. Fill oiling system to first red line of the oil sight
gauge in front of the machine and oil all bearings. Run machine slowly for a minute
to allow the oil wicks to carry the oil to the bearings. Then, repeat the oiling and
run the machine at higher speed. Inspect oiling system for leaks. Wipe up surplus
oil, particularly around the take-up. Oiling diagram No. PL616 is available.
CAUTION! Oil has been drained from the main reservoir before shipment, so the
reservoir must be filled to the proper level as indicated on oil gauge before beginning
to operate.
RECOMMENDED OIL
Use a straight mineral oil of a Saybolt viscosity of 200 to 250 seconds at 100° Fahrenheit
in the main reservoir. This is equivalent to Union Special specification No. 83. Fill
main oil reservoir at opening in upper crank chamber cover and check oil level at
gauge. Oil is at maximum level between two red lines on sight gauge on front of
machine.
CAUTION! It is important that these machines not be over filled.
It is recommended that a new machine, or one that has been out of service for an
extended period be lubricated as follows: Remove the head cover, clean out lint and
directly oil the needle bar link and the needle bar.
Oil bearings, looper rocker, eccentrics and all other parts that have oil wicks touch-
ing them. Replace head cover as no further hand oiling will be required.
Run machine slowly for several minutes to distribute oil to the various parts. Oil
may be drained from main reservoir by removing plug screw located below the
handwheel in the main frame.
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Adjuadn1Inetructions
THREADING AND OILING DIAGRAM FOR CLASS 51300 MACHINES
WITH "KLIPP- IT"
Thread machine as indicated. The looper threading has been enlarged for
clarity.
Oil has been drained from the machine before shipping, and the reservoir must
be filled before beginning to operate. Oil is filled at spring cap (A) in top cover. Oil
level is checked at sight gauge (B); maintain oil level between lines on gauge. Use a
straight mineral oil with a Saybolt viscosity of 200 to 250 seconds at 100° Fahrenheit.
Excessive oil in the main reservoirmay be drained byremoving plug screw located
directly helow the handwheel.
5
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Adjuatin1 Instructions
NEEDLE
Put in a new ' needle of proper type and size.
For Style 51300 KK Type 130 GHS-036 and
for Style 51300 KL Type 130 GHS-040
Place throat plate support and throat plate on the bed to check that the needle enters
the throat plate slot in the middle. Then, remove these parts for adjusting the looper
and mounting of gauge for setting the feed mechanism.
ADJUSTMENT OF THE FEED MECHANISM BY A GAUGE
H J K
F
E
G
Q c
L D G21227 L
__ .,.,
AB
I
----'
_,.,.,
p
Fig. 1
--
N
M
The feed mechanism is set in the assembly department by using gauge G21227 L.
To adjust rocker "G" loosen nut (A. Fig. 1) (CAUTION! NUT HAS LEFT THREAD).
Place the feed crank stud (B) in the main shaft slot (D) and regulate screw (C) so
that the pin (E) of the gauge fits into the hole (F) of the feed rocker shaft. when the
upper part of the segment of the rocker (G) is in its end position to the needle .
Tighten nut (A). Loosen screw (H). place distance gauge (V) in the segment of the
rocker (G) and press the sliding block against the distance gauge (V). Move lever
(J) until the head of screw (K) contacts the stop (L) of the gauge. Tighten screw (H).
Then set stop ring (M) against lever (N).
For the adjustment of reverse feed place distance gauge (R) in the segment of the
rocker (G). Move the sliding block with the knee press against the distance gauge
(R) and set the stop ring (P) against the lever (N).
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AdJutrinl Instructions
ADJUSTMENT OF THE FEED MECHANISM BY A GAUGE (Continued)
After this adjustment the stitch length should be about 8 1I2 stitches per inch in
both directions. For correction reset stop ring (M).
CAUTION! BE SURE THAT THERE IS 1132 INCH SPACE BETWEEN THE SEGMENT
(G) AND THE BED AT THE LARGEST STITCH LENGTH (Q, Fig. 1).
If a larger stitch length than 8 1I2 stitches per inch is needed, re-adjust stop ring
(M) downwards.
All other stitch length changes must be made by the stitch regulating screw (C) after
loosening the nut (A) of the feed crank stud (B).
ADJUSTMENT OF THE FEED MECHANISM WITHOUT GAUGE
H J
G
_, ......
I
--.&
...... -
s
Fig,2
·--
First adjust the feed rocker segment (G) to the largest movement by the regulating
screw (C) after loosening nut (A, Fig. 2).
(CAUTION! NUT HAS LEFT THREAD). The distance from the main shaft head (D)
to the head of the feed crank stud (B) should be 9l32inch (Fig. 3). As the movement
of the feed rocker segment is limited by the bed, make sure that the fre.e space (Q)
is not less than 1I32 inch (Fig. 2).
For adjusting the sliding block turn handwheel until the top part of the segment (G)
is in its end position to the needle. Loosen screw (H), place a pin of 114 inch dia.
(e. g. a drill of 114
11
dia.) between the sliding block and the upper end of the segment.
When the sliding block is pressed against this pin, set the lever (J) so, that the
distance between the head screw (K) and the shaft (S) is 4 118 inches. Tighten screw
(H) and set the stop ring (M) against lever (N).
For adjusting the reverse feed place a pin of 5I 16 inch dia. in the lower part of the
segment (G). Move the sliding blockwith the kneepress against the pin of 5116 inch
dia. and set the stop ring (P) against the lever (N).
7
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AcUuttintE Instructions
ADJUSTMENT OF THE FEED MECHANISM WITHOUT GAUGE (Continued)
After this adjustment the stitch length should be about 8 1/2 stitches per inch in both
directions. For correction reset stop ring (M).
If a larger stitch length than 8 1/2 stitches per inch is needed. re-adjust stop ring
(M) downwards.
All other stitch length changes must be made by the stitch regulating screw (C) after
loosening the nut (A) of the feed crank stud (B).
LOOPER ADJUSTMENT
Insert the looper in the looper rocker. Notice that the screw rests on the looper flat.
The looper gauge represents the measurement from the centerline of the needle to the
point of the looper when the looper is at the right end of the stroke. This measure-
ment should be 5/32 inch. Looper gauge No. 21225-5/32 can be used advantageously
in making this adjustment.
For the looper gauge adjustment loosen the two nuts on the looper connecting rod.
After the right gauge is set. tighten the nuts securely. Notice that the connecting rod
ball joints have clearance in all positions.
LOOPER AVOID MOTION
When the looper moves to the left. its point should pass the rear of the needle as close
as possible without contacting.
SYNCHRONIZING LOOPER AND NEEDLE MOTIONS
Use gauge No. 21227 R. Insert the pin. which is included with the gauge. in the looper
rocker. Place the gauge plate on the throat plate seat using the throat plate screws
for attaching. Place the indicator portion of the gauge in the needle thread take- up
wire holder with the pointer to the right. Do not tighten the set screw at this time.
Turn handwheel in operating direction until the pin in the looper rocker contacts the
edge of the gauge plate and set the indicator so that the left end of the pointer rests
against the top of the needle bar and the right end of the pointer rests at "O". Tighten
set screw and note indicator reading. Turn the handwheel in the reverse direction
until the pin again contacts the plate. If motions are in synchronization the pointer
on the indicator will return to the same reading. A variation of one graduation on the
scale is allowable. If the reading is higher on the scale when the handwheel is turned
in operating direction. the looper drive lever rocker will have to be moved to the
rear. If the reading is lower. this rocker will have to be moved to the front. Remove
the oil reservoir top cover and drain the reservoir. Loosen the screws in the looper
drive eccentric mechanism and move the eccentric as far to the right as it will go.
Then drive the rear bushing to the front or the middle bushing to the rear. To avoid
distorting the parts remove the plug screw in the rear bushing before driving to the
front and place a horse shoe shape metal washer approximately 1/16 inch thick
between the looper drive lever and the adjacent bushing when driving the bushing to
the rear. Retighten all screws and seal the reservoir cover in position with Permatex
Gasket Cement to prevent oil leakage. A convenient 1/2 pint can. including brush.
is identified by the symbol "CE5C". and will be promptly furnished by Union Special.
Automobile supply shops carry it.
If the gauge is not available. synchronization may be checked as follows:
Insert the looper in the looper rocker and turn the pulley in the operating direction
B
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