Sailrite ULTRAFEED LSZ Manual

ULTRAFEED LSZ
GUIDEBOOK
®
USE, MAINTENANCE, TROUBLESHOOTING, SCHEMATICS

Table of Contents
Ultrafeed Safety���������������������� 1
Machine Damage Prevention�� 2
WorkerB®Speed Settings������� 3
Preparing to Sew�������������������� 4
Choosing Thread Size �����������������4
Needle Types ���������������������������5-6
Needle Installation��������������������7-8
Presser Feet & Feed Dog
Installation������������������������������9-10
What Is the Posi-Pin®Safety
Shear? ����������������������������������� 11-12
Winding Bobbins����������������������13-14
Threading the Machine������������� 15-16
Removing & Installing Bobbin Case��17
Installing Bobbin in Bobbin Case ���������������18
Picking Up Bobbin Thread ������������������������� 19
Using the Ultrafeed ��������������������������������20
Starting to Sew������������������������������������������20
Regulating Stitch Length ���������������������������21
Sewing in Reverse�������������������������������������21
Turning Corners�����������������������������������������22
Switching From Straight to Zigzag Stitch ��� 22
Straight Stitch Needle Positioning��������������22
Thread Tension Adjustment �������������������23
Advanced Thread Tension Adjustment �� 24
Adjusting Presser Foot Tension ������������ 25
Removing Material From Under the
Presser Foot�������������������������������������������26
Ultrafeed Maintenance ���������������������������27
Lubrication ������������������������������������������� 27-30
Troubleshooting the Ultrafeed ��������������� 31
Proper Needle Orientation & Installation���� 32
Replacing the Take-Up Spring ������������������� 33
Material Surface Is Being Damaged ���������� 34
If Posi-Pin®Safety Shear Breaks ��������������� 35
Removing the Hook to Clean the Shuttle
Race Guide Shaft & Free Thread Jams ����� 36
Skipped Stitches����������������������������������� 37-38
Thread Issues��������������������������������������� 39-42
Needle Issues�������������������������������������������� 43
Bobbin Winding Issues ������������������������������ 44
Ultrafeed Timing�������������������������������� 45-54
Schematics���������������������������������������� 55-66
Specifications ����������������������������������� 67-68
Warranty �������������������������������������������� 69-70
Your Sewing Journey
Starts Today!
Congratulations on your new Ultrafeed®Sewing
Machine. Inside this guidebook you'll nd detailed
instructions, photos and videos on how to prepare
and use your machine, as well as troubleshooting and
maintenance advice�
To watch all of the setup and maintenance videos in this
guidebook, please visit Sailrite�com/LSZ-Guidebook-Videos
for a complete video playlist�

Scan to watch a video
on how to install the
pulley and belt�
B
C
1
3
2
4
A
D
WARNING: This product can expose you to chemicals including Nickel (Metallic), which is known to the State of California
to cause cancer� For more information go to www�P65Warnings�ca�gov�
WARNING: CHOKING HAZARD: Small parts� Not for children under 3 years� CONTAINS FUNCTIONAL SHARP POINT� Adult
supervision recommended�
Ultrafeed Machine Damage Prevention
To prevent damage and keep your machine running smoothly,
please observe the following when sewing:
• Lower the presser foot before sewing (A)�
• Always rotate the balance wheel toward you (B)�
• Trap your threads when beginning to sew to avoid a rat’s nest of tangled thread (C)�
• Take-up arm (D) should reach its uppermost position and then start to descend before lifting the foot to remove application�
• With the machine threaded, don’t operate the machine without fabric under the foot.
WorkerB®Motor System Warnings:
• Electrical items exceeding 100 watts should not be used in the control box outlet� Exceeding this limit may blow the
control box fuse�
• Do not plug/unplug the foot control with the control box switched on� This could cause the machine to run
unexpectedly�
• Always use a grounded outlet�
• Don’t use a plug adapter or extension cord without a grounded plug.
• WorkerB Power Pack is designed to work on inverter/generator of 400W or more of the Modied Sine Wave or Square
Wave types� Pure (or Digital Synthesized Wave) Inverters/generators will not work�
• Turn off the motor when servicing, changing needle or
feet, or leaving the machine unattended�
• Do not operate in conditions where you or the machine
are or may become wet�
• Operate the machine on a rm, level surface with
adequate room for safe operation.
• Observe caution when placing your hands, other body
parts or clothing near any moving parts including but
not limited to the walking foot, needle, balance wheel
and belts�
• Do not run the machine without its covers in place�
• Do not stop the movement of the balance wheel with
your hands�
• Always use the proper voltage required for the motor.
• Do not drop the machine�
• Wear protective eyewear when sewing�
• Wear shoes when operating the foot pedal�
• Provide supervision when allowing others to use the
machine, particularly children and those who are
unfamiliar with the machine’s operation.
• Do not use the machine around ammable materials.
• Do not use a plug adapter or extension cord that
bypasses the ground pin�
• When plugging the foot control wiring into the
machine, be cautious to connect the receptacles
correctly to avoid electric shock�
• Always rotate the balance wheel by grabbing the
top of the wheel and rotating toward the front of the
machine�
Ultrafeed Safety
Please observe the following when using your Sailrite®sewing machine:
1 | Sailrite�com Ultrafeed®LSZ Guidebook | 2

Change the WorkerB®
Top-End Speed Settings
5
6
7
Off
Stitch by Stitch
140 spm* 550 spm**
*65 spm with optional Monster®ll Balance Wheel
**260 spm with optional Monster ll Balance Wheel
Variable Speed
A
1� Turn on the power pack (A)�
2� Adjust the speed setting by rotating the dial�
a� Turn the dial toward the “-” sign
for the slowest setting�
b� Turn the dial toward the “+” sign
for the fastest setting�
THREAD SIZE TEX SIZE NEEDLE SIZE
All Purpose N/A #10 or #12
V-30 30 #12 or #14
V-46 45 #14 or #16
V-69 70 #16 or #18
V-92 90 #18-#20
Sailrite®Lifetime (PTFE) 90 #14-#19
Preparing to Sew
Choosing Thread Size
The key to a successful sewing project is pairing your needle with the right size of thread�
Improperly matching needle and thread sizes can result in tension issues, skipped stitches
and even broken needles� Refer to the chart below to make sure you are using the correct
size combinations�
Needle and thread recommendations for sewing specialty fabrics are available online in our “Thread & Needle Recommendation Guide�” Search
#300032XHT at Sailrite�com to learn more�
3 | Sailrite�com Ultrafeed®LSZ Guidebook | 4

SAN 5�2 Ball Point D1 Perpendicular
Point
Triangular
Point
Twist Point
SD1
Round/
Sharp
Needle Types
Ultrafeed Sewing Machines require 135x17 or 135x16 needles sizes #10 to
#22, all available at Sailrite®�
SD1 needles are optimized for ne leather; they also work
well for sewing heavy sailcloth assemblies� The needle
partially cuts, then pushes material bers out of the way.
Ball Point needles are specically designed for use with knit
or stretchy materials� The blunt tip on this needle passes
thread between material bers instead of through them.
SAN 5�2 needles can sew the same materials as Round/
Sharp Point needles but with fewer issues such as
deection, needle breakage and material damage. They are
ideal for sewing slippery threads like PTFE or lifetime thread
and are more resistant to needle gumming from basting tape�
DI needles have large, diamond-shaped cutting points
that easily sew heavy, dry and hard leather� They
produce straight seams with recessed stitches� These
needles are best for sewing medium to long stitches�
Twist Point needles have oval-shaped cutting points
that are twisted 45 degrees from the needle eye�
They are best for sewing short to medium stitches in
light to medium-hard leather� These needles produce
decorative seams of slanted, slightly elevated stitches
that closely mimic the look of hand stitching�
Perpendicular Point needles have wide, at cutting
points that are perpendicular to the direction of
sewing� They can sew very strong seams in light
to heavy leather� They produce decorative seams
of slanted, recessed stitches� These needles are
best for sewing very short to short stitches�
Triangular Point needles have sharp, three-sided
cutting points that easily sew thick or hard leather� They
produce seams with slightly elevated stitches� These
needles are best for sewing medium to long stitches�
Round/Sharp Point needles are used for all general
sewing� Serv7 needles are modied Round Point
needles that have an extended shoulder to prevent
skipped stitches and reduce needle breakage�
5 | Sailrite�com Ultrafeed®LSZ Guidebook | 6

To help verify that the needle is correctly installed,
look through the hole on either side of the needle
bar just above the needle screw� The butt of the
needle should be pressed against the solid portion
of the needle bar. If it isn’t, loosen the needle screw
and push the needle further up until it stops moving�
C
Scan to watch a video on how
to install a needle�
8
A
9
9
A
B
CAUTION: Improperly installed
needles result in thread breaking,
skipped stitches and more�
AScarf
BNeedle bar
CNeedle screw
Ultrafeed needles are round on top, unlike home sewing machine needles� As a result, proper installation must be exercised
carefully� The needles have two sides: the long channel side with a groove running the needle length and the side with a short
scarf (A) (i�e�, a carved-out area) above the needle eye�
1� Push the needle all the way up into the needle bar (B)�
2� Rotate the needle so the scarf (A) faces the right as you face the front of the machine�
3� Tighten the needle screw (C)�
Needle Installation
1
3
2
7 | Sailrite�com Ultrafeed®LSZ Guidebook | 8

B
A
10 11
Scan to watch a video on how
to install a presser foot set�
13
12
14 15
Presser Feet & Feed Dog Installation
How to Install Center & Outside Feet
1� With the foot raised, rotate the balance wheel
so that the outside foot is at its highest position�
Loosen the screw enough to slip off the foot
(A); screw does not need to be removed.
2� Rotate the balance wheel so the needle is
at its highest position and then remove the
center foot (B)� Screw must be removed�
NOTE: If installing a feed dog, jump to “How to
Install a Feed Dog” before proceeding to step 3�
3� With the needle at its highest position, install
the center foot (B) and tighten its screw�
4� To install the outside foot, rotate the balance
wheel so the outside foot bracket is at its highest
position� Slide the outside foot underneath the
screw and push it up so it rests rmly against the
bracket and loosely tighten the screw (A)�
5� Lower the foot and rotate the balance
wheel until the needle is in its highest
position� Firmly tighten the screw (A)�
How to Install a Feed Dog
1� Unscrew and remove the needle plate (C) from the
machine bed� This will expose the feed dog (D)�
2� Unscrew (E) and remove the old feed dog from the
machine bed�
3� Install the new feed dog (F) and loosely tighten the
screws� The feed dog should be able to slightly move
side to side�
4� Lay the needle plate (C) over the feed dog (F)�
Check to see whether the feed dog is straight in
the needle plate slots (G)� Adjust as needed, then
remove the needle plate and nish tightening the
feed dog screws�
5� Reinstall the needle plate and screws into the
machine bed�
NOTE: Follow steps 3-5 of “How to Install Center &
Outside Feet” to reinstall the center and outside foot�
D
C
G
F
E
9 | Sailrite�com Ultrafeed®LSZ Guidebook | 10

16
17
A
B
The Posi-Pin Safety Shear is a sacricial pin that ts through a hole in the
balance wheel face and into a mating hole in the balance wheel bushing� It locks
these components together to operate the machine and power the needle�
Why Is the Posi-Pin So Important?
This revolutionary piece of sewing machine technology is patented by Sailrite®
and can only be found on Sailrite sewing machines� Its main purpose is to prevent
internal damage in the event that the machine jams, the needle collides with
something impenetrable or a bind occurs� Turn to the next page to learn more about
how the Posi-Pin protects your Ultrafeed Sewing Machine�
What Is the Posi-Pin®Safety Shear?
Scan to watch a
video on how the
Posi-Pin works�
Designed to Protect Your Machine
In the event of a bind or machine jam, the pin will break at the shear point (A), preventing the machine from operating,
when there is too much resistance on the machine� This prevents internal damage or misalignment� If the Posi-Pin
breaks, simply remove the broken pin, replace it with a new one and check the cap spring for damage (p� 38, 57)� Then
install a new needle (p� 7) and verify that the needle bar height has not shifted (p� 45)� You can then continue sewing
without issue�
NOTE: When the Ultrafeed is not being used, remove the Posi-Pin and place it in the Posi-Pin Keeper (B) or the storage cubby
(C)� This is to prevent the compression shaft from enduring unnecessary deformity over time�
C
11 | Sailrite�com Ultrafeed®LSZ Guidebook | 12

G
F
H
E
B
J
C
A
A
18
I
It’s faster to wind while you sew!
Run thread to the bobbin winder from an extra cone
of thread� Simply place the second cone beside the
primary cone and lead the thread up through the same
guides� Follow normal bobbin winding instructions but
do not disengage the clutch�
19
D
E
Scan to watch a video on
how to wind a bobbin�
Winding Bobbins
Disengage the Clutch
To disengage the machine, pull the Posi-Pin®Safety Shear (A) out of the balance wheel (B)� The balance wheel will now
rotate without operating the machine� Push the pin into the hole at the center of the Posi-Pin nut (C) to store�
Thread the Bobbin on the Machine
1� Thread comes off the top of cone (D) to the thread stand
arm (E)�
2� Pass thread through a hole in the spool pin (F) (most
direct route to bobbin tensioner)�
For home sewing, refer to “NOTE” on p� 15�
3� Wrap thread around bobbin tensioner (G)�
4� Run under and up through a hole in top of bobbin (H)�
Place bobbin on post and push to the right� Hold onto
thread tail briey and power machine with the clutch
disengaged to wind bobbin� Stop after several rotations
and cut the thread tail off ush with the bobbin side.
5� Continue winding until the bobbin is full� Then remove the
bobbin from the winder post by pushing the post to the left
and pulling the bobbin off� Cut the thread�
Engage the Clutch
To continue sewing, push the Posi-Pin (A) through one of
the holes in the balance wheel (I) (any will work)� While
maintaining light pressure on the Posi-Pin, rotate the balance
wheel (J) until the Posi-Pin locks into one of the holes in the
bushing that the balance wheel rides on� Push the Posi-Pin
all the way in until the shoulder is ush against the balance
wheel� Rotating the balance wheel will now cause the
machine to function�
CAUTION: Do not overll bobbin and force into
bobbin case or the machine will not function correctly�
13 | Sailrite�com Ultrafeed®LSZ Guidebook | 14

H
L
M
L
20
Scan to watch a video on
how to thread the machine�
K
P
N
O
D
F
C
B
E
A
G
J
I
D
Threading the Machine
1� Thread comes off the top of the cone
(A) to the thread stand arm (B)�
2� Pass the thread through one hole in
the spool pin (C) using the most direct
route to the bobbin tensioner (D)�
NOTE: For home sewing, use the spool pin
(C) to hold the thread spool (E)� Make sure the
spool is rotating clockwise to ensure the spool
pin it rides on is tightened, not loosened�
3� Pass through pig tail of bobbin tensioner (D)�
4� Loop through ear holes going down through
the rightmost hole, skipping middle hole,
and bringing thread around front and down
again through the leftmost hole (F)�
5� Thread through upper tension assembly (shown
without cover knob) (G)� Make sure lift lever
(H) is raised up to release tension plates (I) so
thread can pass through� Be sure to catch the
hooked spring end (J) with the thread last�
6� Pass through take-up arm (right to left) (K) and
then under the end cover (L)� Make sure the
thread goes behind the small metal pip (M)�
7� Pass through the needle bar thread guide hole (N)
and then down through the needle eye from left
to right (O)� Finally, pass the thread through the
hole in the presser foot from top to bottom (P)�
15 | Sailrite�com Ultrafeed®LSZ Guidebook | 16

B
G
H
E
21
F
22
A
BD
G
C
I
E
23
21
Removing & Installing
Bobbin Case
The bobbin case (B) is located on the underside of
the machine beneath the presser foot (21)�
Removing — Lift the spring-loaded lever (E) and
pull the bobbin case out� With the lever held open,
the bobbin is captive in the bobbin case� Release
the lever and the bobbin will fall out�
Installing — Pull and hold the spring-loaded lever
outward to keep the bobbin from falling out and
push the case onto the axle of the gib hook (F)�
The nger of the bobbin case (G) should t into the
retaining ring’s notch (H)�
If the lever (E) is held up until the bobbin case is
completely installed, the lever, when released,
will lock onto the axle and there will be no clicking
sound� If the lever is released before the bobbin
case is pushed completely in place, there is a
clicking sound when the case is pushed all the
way on. The nger of the bobbin case will drop into
the notch in the hook’s retaining ring (H)� Bobbin
thread should loosely dangle�
ABobbin
BBobbin Case
CSlit
DTension Plate
ESpring-Loaded Lever
GFinger
I Tension Adjustment Screw
Scan to watch a video on
how to wind a bobbin�
Installing Bobbin
in Bobbin Case
1� Insert a threaded bobbin (A) into the
bobbin case (B) as shown (22)�
2� Hold the tail of the thread while pushing
the bobbin into the bobbin case�
3� Pull the thread through the slit (C) in
the edge of the bobbin case�
4� Continue pulling the thread under the
tension plate (D)�
5� Snap thread into position under the
tension plate and pull out about 12
to 18 inches of thread, checking for
consistent tension�
6� Holding the case with a view of
the bobbin, the bobbin should turn
clockwise when pulling on the thread
tail (23)� If it is not, take the bobbin out
and ip it over.
NOTE: Machine head tilted back�
17 | Sailrite�com Ultrafeed®LSZ Guidebook | 18

24 25
26 27
29
A
B
C
28
Picking Up Bobbin Thread
1� With the needle threaded and the thread passed through the center foot, hold the needle thread loosely to the right (24)�
Grab the top of the balance wheel and rotate toward the front of the machine (29) until the needle moves down and then
back up�
2� As the needle nears its highest point, pull the needle thread gently� The bobbin thread should come up through the needle
hole, with the needle thread, in the form of a loop (25)�
3� Pass a small instrument (pen, seam ripper, screwdriver, etc�) under the presser foot from right to left to pull the thread out
away from the machine (26 and 27)�
NOTE: If the bobbin thread does not appear when the needle is lowered and raised, check to make sure 5 to 6 inches of
bobbin thread is hanging loosely from the bobbin case and repeat steps 1-3 again�
Using the Ultrafeed
Ultrafeed Sewing Machines arrive tuned and optimized for sewing heavy materials like
marine canvas and vinyl�
Starting to Sew
1� Plug the machine into a grounded outlet and switch on
the WorkerB®Power Pack�
2� Insert the Posi-Pin®Safety Shear into a hole in the
balance wheel� Maintain light pressure on the Posi-Pin
and rotate the balance wheel toward you until the
Posi-Pin locks into a mating hole in the balance wheel
bushing (29)�
3� Push the Posi-Pin all the way in until the shoulder is
ush against the balance wheel face.
4� Use the lift lever (28) to raise (A) and lower (B) the
presser foot onto the material�
5� The thread ends from the needle and the bobbin
should be behind the foot as you start to sew� Hold
them down with your nger for the rst few stitches for
proper tension�
6� To mark your starting position, you may want to rotate
the balance wheel by hand (C) until the needle is
buried in the material�
NOTE: Always rotate the balance wheel
by grabbing the top of the wheel and
rotating down toward you (29)�
7� Press the foot control pedal to begin sewing and
release the trapped threads after the rst few stitches.
ARaise BLower
DO NOT operate the machine when threaded without
material under the presser foot (and foot lowered)� The
machine will most likely “lock up” and be inoperable until the
resulting thread jam is cleared�
Scan to watch a video on
how to get started sewing�
19 | Sailrite�com Ultrafeed®LSZ Guidebook | 20

30
Forward Feed
Reverse Feed
B
B
C
C
A
A
31
-6mm
+6mm
Turning Corners
Turn the balance wheel toward you until the needle is at its
lowest point and then rises about 1/8 inch (3mm)� Then, lift
the presser foot (p� 20, 28), rotate the material to the new
direction (the needle acts as an axis) (32), drop the foot and
start sewing in the new direction�
DO NOT attempt to change sewing directions when the
machine is at rest with the needle positioned mid-stroke� This
will cause a skipped stitch or needle deection.
Rotating the material while the machine is at rest with the
presser foot down may bend the needle�
Switching From
Straight to Zigzag Stitch
The stitch width adjustment lever controls the stitch type
as well as the width of your zigzag stitch (33)� When the
lever is on “0” the machine is in straight stitch� Moving
the lever left toward 5 produces zigzag stitches of varying
widths� The farther left, the wider the zigzag stitch�
DO NOT change the position of the stitch width lever when
the needle is in the fabric or the needle may bend�
NOTE: Plate markings are for reference only, the lever will
not line up perfectly with marks�
Straight Stitch
Needle Positioning
In straight stitch mode (stitch width adjustment lever at
“0”), the needle can be moved left, right or center (34)�
This is very helpful when installing zippers where it is
best to have the needle as close to the zipper teeth as
possible� Gently push down on the lever before moving it
left, right or center�
DO NOT change needle positioning when the needle is in
the fabric or the needle will bend�
NOTE: Plate markings are for reference only, the lever will
not line up perfectly with marks�
Regulating Stitch Length
The EZ Set™ Stitch Length Plate (30)
sets both forward and reverse stitch
length� To set the stitch length, loosen
the two thumbscrews (A), slide the
posts up or down, and tighten the
screws� The thumbscrew stops (B)
restrict the movement of the Feed
Regulator Lever (C), which is spring
loaded to always rest against the upper
stop�
Sewing in Reverse
Position the needle fully up or fully
down and push the Feed Regulator
Lever (C) all the way down� Hold the
lever down until reverse sewing is
completed� The lever is spring loaded
and will return to its forward position
when you release it� When the machine
is operating at 1/4 speed or faster,
reverse can be engaged on the y.
DO NOT rotate the balance wheel in
the wrong direction� Always rotate the
balance wheel by grabbing the top of
the wheel and rotating down toward
you (31)�
32
33
34
21 | Sailrite�com Ultrafeed®LSZ Guidebook | 22

Knots centered — PERFECT STITCH
36
37
35
NOTE: Decorative cap removed
(Excessive tension shown)�
Knots visible on bottom
Knots pulled to top
38
39
Scan to watch a video on
how to adjust stitch tension�
Thread Tension
Adjustment
The correct combination of thread tension (35) results in
a stitch that looks identical on both sides of the material
(i�e�, the knots of the stitches are pulled into the application
and are no more visible on the top than on the bottom)�
If knots are visible on both the top and bottom
material surfaces, this is an indication that the thread
size is too large for the material being sewn�
The upper tension knob (36) can be loosened or tightened to
adjust tension� Rotating the knob clockwise or toward the “+”
will increase upper tension, pulling the knot to the top of the
sewn application (38)� Rotating the knob counterclockwise
or toward the “-” will decrease upper tension, allowing the
knot to be pulled to the bottom of the sewn application (39)�
DO NOT lift the presser foot when the upper tension knob is
less than a 1/2 turn from maximum (turned snugly clockwise)
(37). This amount of tension should never be required.
If upper tension is tightened all the way down,
raising the presser foot may bend the lever
inside the machine that separates the disks,
preventing the disks from opening correctly�
Advanced Thread
Tension Adjustment
Before moving on, please reference p� 4
to ensure proper needle and thread size
are being used for your application�
Tension changes to the bobbin thread should only be
made when upper tension changes alone do not solve
stitch tension. In general, bobbin tension requires
just about a 2-ounce drag on the thread (similar to
what you feel when pulling dental oss off a spool).
If knots are pulled to the top (38) and you can’t
loosen the upper tension knob (36) any more,
remove the bobbin case from the machine and
increase the bobbin case tension by tightening
the tension adjustment screw (A)� Tighten in 1/4
increments, testing the drag on the thread after
each 1/4 turn until proper tension is achieved�
If the knots are pulled to the bottom (39) and you
can’t tighten the upper tension knob (36) any more,
remove the bobbin case from the machine and
decrease the bobbin case tension by loosening
the tension adjustment screw (B)� Loosen in 1/4
increments, testing the drag on the thread after
each 1/4 turn until proper tension is achieved�
Full Rotation: Normal Adjustment
Half Rotation: Minor Adjustment
B
A
23 | Sailrite�com Ultrafeed®LSZ Guidebook | 24

40 41 43
44
C
B
A
Adjusting Presser Foot Tension
The amount of downward pressure put on the application by the presser foot is
controlled by the presser regulating thumbscrew (A)� This screw compresses a
long coil spring above the presser foot�
For sewing heavy, hard-to-feed materials, it is best to have very high pressure
on the foot for optimum feeding� For these materials, tighten the screw until only
1/2 inch or less of the screw's threads are showing (40)�
When sewing delicate or spongy materials, reduce the foot pressure� Turn the
thumbscrew until it comes free of the machine, and then rethread it about three
complete rotations for the lightest spring setting (41)�
Decrease Downward Pressure
Increase Downward Pressure
42
Maximum Downward Pressure Minimum Downward Pressure Removing Material From
Under the Presser Foot
1� Stop the machine after the take-up arm
(B) reaches its uppermost position
and then starts to descend�
2� Raise the feet with the lift lever (C)�
3� Remove the material from under the foot (44)�
It may be helpful to rock the balance wheel
forward and back to free the thread�
4� Cut the two threads to free the
material, leaving at least an 8-inch length
of thread coming out of the machine�
More than two threads? See p� 42�
25 | Sailrite�com Ultrafeed®LSZ Guidebook | 26

Ultrafeed Maintenance
Lubrication
The machine was thoroughly oiled prior to shipment� Oil all metal-to-
metal working parts frequently!
After oiling, briey sew with scrap material to prevent soiling your
work�
For good maintenance of your machine, you should oil it
approximately every 8 hours of use, before it is put in storage, or
anytime the machine sounds like it is running roughly�
Sailrite recommends Sailrite® Sewing Machine Oil for oiling and
maintaining the Ultrafeed Sewing Machine� With regular use, this
highly rened mineral oil will help your machine operate more
smoothly, last longer and sew more quietly�
LSZ Lubrication Points
Top side lubrication points
Speed Reduction Pulley
Under Belt Cover
45
46
Marine Use & Potential for Rust
If the machine will be used or stored in a harsh environment, lubricate the
working parts of the machine with Sailrite Sewing Machine Oil prior to
storage and before each use�
We also recommend using Boeshield® T-9, a parafn-based
protectant, to protect metal surfaces and control knobs� Use even on
the painted surfaces, metal parts, needle plates and presser feet�
Boeshield T-9 leaves a thin protective layer of wax� Use sparingly as a
lubricant as wax buildup can create gumming friction over time�
27 | Sailrite�com Ultrafeed®LSZ Guidebook | 28

Left end and back side lubrication points
47 48 Underside lubrication points
NOTE: Retaining ring removed�
Ultrafeed®LSZ Guidebook | 30
29 | Sailrite�com

49
Scan to watch a
video on how to
install a needle�
B
C
A
Starting a Support Case
If, after reviewing the “Troubleshooting” section, you still have questions about machine performance and operation, we’re
here to help� Your purchase comes with lifetime support from Sailrite®customer service and machine support (see page 69 for
warranty information)� You can start a support case by visiting Sailrite�com/support and lling out the online form. One of our
support team members will review your case and contact you. We will do our best to satisfy every support request accurately,
completely and in a timely manner�
Troubleshooting the Ultrafeed
Use this next section as a guide to better understand your Ultrafeed and to help ne-tune and resolve common sewing
machine problems�
1
3
2
Ultrafeed needles are round on top, unlike home
sewing machine needles� As a result, proper
installation must be exercised carefully� The
needles have two sides: the long channel side
with a groove running the needle length and
the side with a short scarf (A) (i�e�, a carved-out
area) above the needle eye�
1� Push the needle all the way up into the
needle bar (B)�
2� Rotate the needle so the scarf (A) faces the
right as you face the front of the machine�
3� Tighten the needle screw (C)�
CAUTION: Improperly installed needles result in
thread breaking, skipped stitches and more�
Needle Installation
AScarf
BNeedle bar
CNeedle screw
31 | Sailrite�com Ultrafeed®LSZ Guidebook | 32

50
Scan to watch a video on how
to replace the take-up spring�
51
52
Scan to watch a video on how to adjust
the Presser Regulating Thumbscrew�
Replacing the Take-Up Spring
(#533211)
If you are getting inconsistent stitch tension or if your thread looks loose and sloppy near the tension assembly under
operation, check your take-up spring (H). If the wire hook has broken off, you’ll need to replace the take-up spring. To do
this, disassemble the Upper Tension Assembly� Keep track of how the parts are removed as they will be replaced in the
same manner (50)�
1� Pull the cover knob (A) straight off (wiggle a bit if
needed)�
2� Unscrew and remove the threaded
knob (B)�
3� Remove the big spring (C), the spring holder (D), the
two tension disks (Eand F), and the keyway washer
with pip (G)�
4� Remove the old take-up spring (H) by pulling it straight
out�
5� Slide the new take-up spring over the core post
(I) so that the pip on the back faces in toward the
machine and the straight arm of the spring faces down
(approximately at a 6 o’clock position). Push the spring
in all the way�
6� Spin the arm of the spring clockwise past the slot in
the plastic core�
7� While holding the spring arm in place, slide the
keyway washer (G) back onto the core with the pip
facing in, so the take-up spring arm rests on the metal
pip of the washer�
8� Replace the rst tension disk (F) with the convex side
facing out� Add the second tension disk (E) with the
concave side facing out�
9� Replace the spring holder (D) with the concave side
facing out and the spring (C)� Screw the threaded
knob (B) back on the post and add the cover knob (A)�
ABCDEFGHIJ
Material Surface Is Being Damaged
Surface marring is damage to leather and other delicate material
surfaces� To avoid marring, reduce the amount of pressure down
on the presser feet by nearly unthreading the presser regulating
thumbscrew from the machine (51)� See “Adjusting Presser Foot
Tension” (p� 25)�
33 | Sailrite�com Ultrafeed®LSZ Guidebook | 34

D
C
B
55
53
54
Scan to watch a video
on how to replace
the Posi-Pin�
1� Remove the broken Posi-Pin and discard it (53)�
2� Insert a new Posi-Pin into one of the
holes in the balance wheel�
3� Maintain light pressure on the Posi-Pin and rotate
the balance wheel toward you until the Posi-Pin locks
into a mating hole in the balance wheel bushing�
4� Push the new Posi-Pin all the way in until the shoulder
(A) is ush against the balance wheel face.
5� Tilt the machine back and remove the retaining ring (B),
bobbin case (C) and gib hook (D)� Check both parts
for burrs or damage from a needle strike (p� 38, 57)�
6� Remove any burrs by polishing the parts with emery
paper or a ne le. Or replace if badly damaged.
7� Install a new needle and you are ready to keep sewing�
If Posi-Pin®Safety Shear Breaks
The Posi-Pin Safety Shear is designed to break at the shear
point to protect the machine from internal damage or timing
issues when you hit something you shouldn’t while sewing.
The pins are intended to be sacricial, and replacing a
broken one is easy�
A
Removing the Hook to Clean the Shuttle
Race Guide Shaft & Free Thread Jams
Perform these steps with care:
1� Move the needle to its highest point�
2� Remove the bobbin case and bobbin�
3� Turn each lever (E) 1/2 turn away from the retaining ring (B)�
4� Pull the axle of the hook to remove retaining ring (B) and gib hook (D)�
5� Gently remove the accumulated lint and thread from the retaining ring (B), hook (D)
and driver (F)� Use a small brush to clean the parts or blow out the debris�
6� Replace hook (D) opposite driver (F)� The hook just
rests in place� Be sure the axle is facing out�
7� Replace retaining ring (B) so that both pins are
under the black levers (E) when turned�
8� Replace the bobbin and bobbin case
before beginning to sew�
Scan to watch a video on
how to clean the shuttle�
F
E
B
Gib Hook Axle
D
35 | Sailrite�com Ultrafeed®LSZ Guidebook | 36