UnionSpecial LF611K 100HM Setup guide

From the library of: Superior Sewing Machine & Supply LLC
CATALOG NO.
143M
First Edition
STYLES
LF611K 100HM
LF611K 10OMF
LF611K 100MG
LF611K100MR
LF611K100MW
LF611K 100MAW
LF611K 112MF
LF611K112MG
®
Finest Quality
Adjusting instruc~ions an~
illustrated parts 11st ~
Single-needle, LF600 "Standard Classn plain
feed flatbed machines for seaming operations.

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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 to forming the stitch and completing the
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 other related parts.
Implementation of Preventive
Maintenance Schedule can bring about significant
improvements in operator productivity by avoiding costly equipment breakdowns.
Whenever it becomes necessary to make repairs or replace parts on your machine, be
sure to insist on genuine UNION SPECIAL Repair Parts. These parts are designed
specifically for your
machine and manufactured with utmost precision to assure long
lasting service.
This Catalog has been made on the basis of available information. Changes in
design and/or
improvements may incorporate a slight modification of configuration
in
illustrations or part numbers.
CATALOG NO. 143M
For Styles
LF611K100HM
LF611K100MF
LF611KlOOMG
LF611KlOOMR
LF611KlOOMW
LF611KlOOMAW
LF611Kl12MF
LF611K112MG
First Edition
Copyright
1987
By
Union Special Corporation
Rights
Reserved In All Countries
Printed in
U.S.A.
September, 1987
2

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Each UNION SPECIAL machine 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's position at the
machine, unless otherwise noted.
The handwheel rotates counterclockwise in
operating direction
when viewed from 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 looper avoid.
LF611KlOOHM Single needle, HIGH sewing capacity machine with sewing parts to
accomodate Selvage Edge Binder -for binding mattress ticks made
from medium heavy to heavy weight materials. Uses selvage edge
binding 5/8, 3/4 and 7/8 inch (15.8, 19.0 and 22.2mm) wide to
produce a 5/16, 3/8
and 7/16 inch (7.9, 9.5 and 11.1mm) finish.
Standard
recommended needle Type 128 GAS, Size 125/049. Stitch
range 5-14 S.P.I. Maximum recoR111ended speed 6500 R.P.M.
LF611KlOOMF Single needle, MEDIUM sewing capacity machine with low inertia
presser foot, permitting 1ight presser foot pressure for positive
feeding
and chaining at high speeds - for long seams on light to
medium weight fabrics such as in trousers, skirts, coats, jackets,
etc. Standard recommended needle Type 128 GBS, Size 90/036. Stitch
range 7-10 S.P.I. Maximum recommended speed 6500 R.P.M., depending
on operation.
LF611K100MG Single needle, MEDIUM sewing capacity machine used for side and
inseaming men's work and dress pants made from medium weight
material. Standard
recommended needle Type 128 GBS, Size 90/036.
Stitch
range 10-14 S.P.I. Maximum recommended speed 6500 R.P.M.,
depending on operation.
LF611KlOOMR Same as Style LF611KlOOMF except - fitted with feeding presser foot
with yielding section to
left, allowing crossing of seams and
pockets.
LF611KlOOMW Same as Style LF611KlOOMF except - used for seaming cotton, flannel
and leather palm gloves. Standard recommended needle Type 128 GAS,
Size 110/044. Stitch range 5-14 S.P.I.
LF611KlOOMAW Same as Style LF611K100MF except -equipped with narrow feeding
presser foot
and related sewing parts for 3/16 inch (4.8mm) margin.
LF611K112MF Same as Style LF611K100MF except -equipped with Power "AIR-KLIPP ®"
chain
cutter.
LF611K112MG Same as Style LF611K100MG except -equipped with Power "AIR-KLIPP"
chain cutter.
® "AIR-KLIPP" is a registered trademark of Union Special Corporation.
3

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SAFETY RULES
A
CAUTION!
THIS SYMBOL INDICATES YOUR PERSONAL SAFETY IS INVOLVED
TO PREVENT PERSONAL 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.
Oil has been drained from main reservoir before shipment. Use a straight mineral
oil with a Saybolt viscosity of
90 to 125 seconds at 100 degrees 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. Check oil level while machine is
running which MUST be maintained between the red lines 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 one year. Oil drain plug is located in bottom
of oil pan. ALWAYS change oil filter when oil is changed. 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 FROM TOP OF
OLD FILTER AND INSTALL IN NEW FILTER. Reassemble in reverse manner.
4

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PtOO
LUBRICATION DIAGRAM
..__ __. PRESSURE OIL
- SIPHON RETURN
Fig. 1
5
FILTER BY-PASS

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PIVOT GUARD
TO LEFT FOR
THREADING
A1 0 0A
THREADING DIAGRAM
6
0
(/)

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NEEDLES
Each needle has both a type and size number. Type number denotes the kind of
shank, point, length, groove, finish and other details. Size number, stamped on
the needle shank in metric, 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 CORPORATION.
The type numbers of the needles recommended for each Style of machine covered by
this catalog are given in the machine style description. Other needles are
available, but the
ones indicated are those recommended to produce the most
satisfactory results. The type numbers of the recommended needles together with
their descriptions, and the sizes available are listed below:
NEEDLE TYPE
128 GAS
128 GBS
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.
SIZES AVAILABLE
80/032, 90/036,
100/040, 110/044,
125/049, 140/054,
150/060, 170/067.
80/032, 90/036,
100/040, 110/044,
125/049, 140/054,
150/060.
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 order would read
11
1000 needles, Type 128 GBS, Size 90/036
11
•
THREAD MACHINE AS ILLUSTRATED.
7

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Fig. 2
Fig. 3
Fig. 4
TIMING FEED TO NEEDLE
Adjustment would be required if the machine
is feeding while the needle is in the work.
This can be accomplished by removing top
cover,
head cover, left cloth plate and top
feed
chamber cover. Rotate handwheel in
operating direction to position needle bar
at
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
shaft
and in a vertical position. Adjustment
can be made by loosening two screws (A, Fig.
3) in upper mainshaft sprocket (B). Hold the
handwheel firmly with needle bar at bottom of
stroke
and rotate pulley as required to
position screw (A, Fig. 2) so it is
verti ca 1. Tighten screws (A, Fig. 3)
securely.
SYNCHRONIZING LOOPER AND NEEDLE MOTIONS
NOTE: End cover has been removed for clarity
in Figure 4, but MUST BE IN POSITION
WHILE MAKING THE FOLLOWING ADJUSTMENTS.
Looper drive belt, (A, Fig. 4) has proper
tension
if, when turning handwheel in
operating direction to position looper in the
center
of its (ri9ht to left) travel •••there
is no noticeable (right to left) play in the
looper
mechanism. There should be
approximately 1/8 inch (3.211111) deflection in
looper drive
belt when pressing firmly with
thumb, midway between sprockets (B and C).
Adjustment can be made by loosening two
screws (A, Fig. 5) and turn 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 bar
eyelet guard, needle thread take-up
cam,
needle, presser foot, throat plate, looper
and feed dog. Turn handwheel to position
needle bar
at BOTTOM of stroke and 1ooper
holder
at EXTREME right end of travel.
8

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SYCHRONIZING LOOPER AND NEEDLE MOTIONS
(Continued)
Using gauge No. 21227 R, mount gauge pl ate
with
throat pl ate attaching screws. Insert
pin (included with gauge) into looper
holder.
Mount indicator block to machine
head with one of the screws removed from
needle bar eyelet guard. Insert shank of
indicator
gauge into indicator block and
tighten screw against shank. (See sketch A
for reference).
Rotate
handwheel in OPERATING 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
indicator
gauge at "O" and tighten screw (A)
VERY LIGHTLY.
NOTE: This screw is specifically tightened
to
ONLY 10 in-lbs (11.5 cm/kg).
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) graduation on the
scale
is permissible. If the reading is
above "O", loosen screws (E, Fi9. 4) and turn
rear looper drive sprocket
(B) towards the
operator (clockwise as
viewed in Figure 4).
If the reading is below "O", turn sprocket
away from operator (counterclockwise as
viewed in Figure 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 "O", loosen screws (E) and turn
sprocket
(B) away from operator
(counterclockwise as
viewed in Figure 4). If
the reading is below "O", turn sprocket
towards the operator (clockwise as
viewed in
Figure 4). Temporarily
snug screws.
Continue
OPERATING
pointer of
graduation
handwheel
tightening
have .002
sprocket
connecting
to
check and adjust in both
and REVERSE directions until
indicator
gauge comes within (1)
on the scale when turning the
in
either direction. Before
screws
(E) securely, be sure to
inch
(.051mm) clearance between
(B) and needle guard drive
rod (F).
9
Fig. 5
- ---- i' -- -~ --
-~-- -
Fig. 6

From the library of: Superior Sewing Machine & Supply LLC
SYNCHRONIZING LOOPER AND NEEDLE MOTIONS (Continued)
LOOPER BEHIND
NEEDLE LOOPER IN
FRONT OF
N
EE DL E
l_ ~ ~
GR lf,E A ij T,_ES.:T=-_-ljtr,,---=:===: __
LEAST
-----l
A 1 07
SKETCH B
OPERATING
DIRECTION
If a synchronizing gauge is not
available •••. turn the handwheel in operating
direction to position looper point even with
the left side of needle and check the
distance from the eye of needle to the bottom
of looper blade. Turn handwheel in reverse
direction to position looper point even with
LOOPER
BEHIND
NEEDLE
LOOPER IN
FRONT OF
NEEDLE
the left side of needle and check the
distance from the eye of needle to the bottom
of looper blade. If the distance was greater
when handwhee l was turned in operating
direction, (as viewed in sketch B) loosen
screws (E, Fig. 4)
and turn rear looper drive
sprocket . (B) away from operator
(counterclockwise as viewed in Figure 4).
l _171lr'====~....__
GREATEST
1r-----1
REVERSE
DIRECTION
A109
For Proper SYNCHRONIZATION of
Looper & Needle
these two Dimensions will be the same
Looper
BEHIND
Needle
in
OPERATING
Direction
SKETCH D
Looper in
FRONT
of
Needle
in
REVERSE
Direction
A1011
SKETCH C
If the distance was greater when handwheel
was turned in reverse direction, (as viewed
in sketch C) turn sprocket towards the
operator (clockwise as viewed in Figure 4).
Temporarily snug screws. Continue to check
and adjust in both OPERATING and REVERSE
directions until the distance from the eye of
the needle to the bottom of looper blade is
the same in either direction (as viewed in
sketch D). Before tightening screws (E, Fig.
4)
securely, be sure to have .002 inch
(
.OSlmm) clearance between sprocket (B) and
needle guard drive connecting rod (F).
Fig. 7
10