Save This Manual

You will need the manual for the safety warnings and precautions, assembly instructions, operating and maintenance procedures, parts list and diagram. Keep your invoice with this manual. Write the invoice number on the inside of the front cover. Keep the manual and invoice in a safe and dry place for future reference.

Safety Warnings and

Precautions

WARNING: When using tool, basic safety precautions should always be followed to reduce the risk of personal injury and damage to equipment.

Read all instructions before using this tool!

1.Keep work area clean. Cluttered areas invite injuries.

2.Observe work area conditions. Do not use machines or power tools in damp or wet locations. Don???t expose to rain. Keep work area well lighted. Do not use electrically powered tools in the presence of flammable gases or liquids.

3.Keep children away. Children must never be allowed in the work area. Do not let them handle machines, tools, or extension cords.

4.Store idle equipment. When not in use, tools must be stored in a dry location to

REV 03d, 03e, 04c, 10b

inhibit rust. Always lock up tools and keep out of reach of children.

5.Use the right product for the job. Do not attempt to force a small product

or attachment to do the work of a larger industrial tool. There are certain applications for which this product was designed. It will do the job better and more safely at the rate for which it was intended. Do not modify this product and do not use this product for a purpose for which it was not intended.

6.Dress properly. Do not wear loose clothing or jewelry as they can be caught in moving parts. Protective, electrically nonconductive clothes and nonskid footwear are recommended when working. Wear restrictive hair covering to contain long hair.

7.Do not overreach. Keep proper footing and balance at all times. Do not reach over or across running machines.

8.Maintain tools with care. Keep needles sharp and tools clean for better and safer performance. Follow instructions for lubricating and changing accessories. Inspect tool cords periodically and, if damaged, have them repaired by a qualified technician. The handles must be kept clean, dry, and free from oil and grease at all times.

9.Disconnect power. Always turn the machine off and, if possible, disconnect the power plug of the machine from the receptacle before adjusting, repairing, or cleaning the machine; leaving the machine unattended; tilting the machine head; or removing the V-belt.

10.Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are removed from

the machine work surface before plugging it in.

11.Avoid unintentional starting. Be sure the switch is in the Off position when not in use and before plugging in.

12.Stay alert. Watch what you are doing, use common sense. Do not operate when you are tired.

13.Check for damaged parts. Before using any product, any part that appears damaged should be carefully checked to determine that it will operate properly and perform its intended function. Check for alignment and binding of moving parts; any broken parts or mounting fixtures; and any other condition that may affect proper operation. Any part that is damaged should be properly repaired

or replaced by a qualified technician. Do not use if any switch does not turn On and Off properly.

14.Guard against electric shock. Prevent body contact with grounded surfaces such as pipes, radiators, ranges, and refrigerator enclosures.

15.Replacement parts and accessories. When servicing, use only identical replacement parts. Use of any other parts will void the warranty. Only use accessories intended for use with this tool. Approved accessories are available from Harbor Freight Tools.

16.Do not operate tool if under the influence of alcohol or drugs. Read warning labels if taking prescription medicine to determine if your judgment or reflexes are impaired while taking drugs. If there is any doubt, do not operate the tool.

17.Use proper size and type extension cord. If an extension cord is required, it must be of the proper size and type

to supply the correct current to the tool without heating up. Otherwise, the

extension cord could melt and catch fire, or cause electrical damage to the tool.

This tool requires use of an extension cord with up to 10 amps capability (up to 50 feet), with wire size rated at 18 AWG. Longer extension cords require larger size wire. If you are using the tool outdoors, use an extension cord rated for outdoor use (signified by ???WA??? on the jacket).

18.Maintenance. For your safety, service and maintenance should be performed regularly by a qualified technician.

19.People with pacemakers should consult their physician(s) before use.

Electromagnetic fields in close proximity to heart pacemaker could cause pacemaker interference or pacemaker failure.

20.WARNING: The brass components of this product contain lead, a chemical known to the State of California to cause birth defects (or other reproductive harm). (California Health & Safety code ?? 25249.5, et seq.)

21.The warnings, cautions, and instructions discussed in this instruction manual cannot cover all possible conditions and situations that may occur. It must be understood by the operator that common sense and caution are factors which cannot be built into this product, but must be supplied by the operator.

Sewing Safety Precautions

1.Keep hands away from the needle when you turn the power switch on, or while the machine is operating.

2.Do not place your fingers into the thread take-up cover while the machine is operating.

3.Never leave the machine running and unattended.

4.During operation, never place your head, hair, or hands in the proximity of the hand wheel, V-belt, bobbin winder, or motor.

5.Do not operate the machine with any safety guards removed.

6.This machine shall only be operated by appropriately trained operators.

7.For your personal protection, we recommend you wear ANSI approved safety glasses when using the machine.

8.If oil or grease comes in contact with your eyes or skin, immediately wash the affected areas and consult a physician.

9.Tampering, modifying or altering any device (aside from the cord and plug by a licensed electrician) on the machine is prohibited and will void manufacturer???s warranty.

10.Repair, adjustment, and specific maintenance shall only be performed by a qualified service technician. Alteration or replacement of the 3 prong grounded electrical plug provided with the machine must only be performed by a licensed electrician. This machine must be properly grounded.

11.This sewing machine is only to be used for the purpose intended.

Grounding

To prevent electric shock

and death from incorrect grounding wire connection:

Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded.

Do not modify the power cord plug provided with the tool. Never remove the grounding prong from the plug. Do not use the tool if the power cord or plug is damaged. If damaged, have it repaired by a service facility before use. If the plug will not fit the outlet, have a proper outlet installed by a qualified electrician.

Grounded Tools: Tools with Three Prong Plugs

3-Prong Plug and Outlet

1.Tools marked with ???Grounding Required??? have a three wire cord and three prong grounding plug. The plug must be connected to a properly grounded outlet.

If the tool should electrically malfunction or break down, grounding provides a low resistance path to carry electricity away from the user, reducing the risk of electric shock. (See 3-Prong Plug and

Outlet.)

REV 10b

2.The grounding prong in the plug is connected through the green wire inside the cord to the grounding system in the tool. The green wire in the cord must be the only wire connected to the tool???s grounding system and must never be attached to an electrically ???live??? terminal.

(See 3-Prong Plug and Outlet.)

3.The tool must be plugged into an appropriate outlet, properly installed and grounded in accordance with all codes and ordinances. The plug and outlet should look like those in the preceding illustration. (See 3-Prong Plug and

Outlet.)

Extension Cords

1.Grounded tools require a three wire extension cord. Double Insulated tools can use either a two or three wire extension cord.

2.As the distance from the supply outlet increases, you must use a heavier gauge extension cord. Using extension cords with inadequately sized wire causes a serious drop in voltage, resulting in loss of power and possible tool damage.

(See Table A.)

3.The smaller the gauge number of the wire, the greater the capacity of the cord.

For example, a 14 gauge cord can carry a higher current than a 16 gauge cord.

(See Table A.)

4.When using more than one extension cord to make up the total length, make sure each cord contains at least the minimum wire size required. (See Table

A.)

5.If you are using one extension cord for more than one tool, add the nameplate amperes and use the sum to determine

the required minimum cord size. (See

Table A.)

6.If you are using an extension cord outdoors, make sure it is marked with the suffix ???W-A??? (???W??? in Canada) to indicate it is acceptable for outdoor use.

7.Make sure the extension cord is properly wired and in good electrical condition.

Always replace a damaged extension cord or have it repaired by a qualified electrician before using it.

8.Protect the extension cords from sharp objects, excessive heat, and damp or wet areas.

RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS* (120/240 VOLT)

the rated amperes.

n0 xxxx/min. No Load Revolutions per Minute (RPM)

Unpacking

When unpacking, check to make sure that the parts shown in the photo on the following page are included. Note that the machine table shown is not included, and must be ordered separately. If any parts are missing or broken, please call Harbor Freight

Tools at the number on the cover of this manual as soon as possible.

Assembly

Sewing Machine

Table Stand and

Top (not provided) Power Switch

Motor Knee Lifting Arm for Presser Foot

Figure 1

The assembly instructions describe mounting the Single-Needle Sewing Machine (Model

03914) to the Table Stand (Model 03929), not included. In order to complete this procedure, you must first purchase and assemble the

Table Stand Kit (Model 03929).

Installing the Oil Pan and Sewing Machine to the Tabletop of Industrial Sewing Machine Table (SKU 3929 - sold separately)

Oil Pan (1g) hole in Tabletop (30)

Rubber Pads (23g)

Corner Rests

Rubber Cushions (24g)

(Operator Side of Table)

Rubber Pads (23g)

Rubber Cushions (24g)

Figure 2

1.Working in the rectangular hole of the Tabletop where the Oil Pan (1g) will sit:

Place the Rubber Cushions (24g) on the operator-side corner rests, and the Rubber Pads (23g) on the hinge-side corner rests. Secure with two Tacks (25g) in each Pad or Cushion.

Note: The Rubber Pads (23g) are optional. They may be omitted, or used under the Rubber Cushions (24g) to adjust the tilt

REV 07f, 10b

of the machine, depending on the user???s preference.

Hinge Indentations in Tabletop

Back of

Sewing

Machine

Oil Pan (1g)

Hinge (1h)

Figure 3

2.Seat the Oil Pan (1g) on the Rubber

Pads and Cushions in the Tabletop opening.

3.Insert the Hinge Cushions (2h) into the tabletop, securing them with two Tacks (25g) in each Hinge Cushion.

4.Insert the Hinges (1h) into the holes in the back of the Sewing Machine.

Machine Rest

Pin (19h)

Figure 4

5.Insert the Machine Rest Pin (19h) in the hole provided in the table stand.

6.Carefully place the machine, hinge side first, into the Rubber Hinge Plates and over the Oil Pan.

Oil Sight

Window (1f)

Hand Wheel

(7b)

Figure 5

7.Tilt the machine back to expose the Oil Pan (1g). Insert the Knee Press Lifter

Rod (2g). Place the Oil Pan Magnet

(22g) in the lowest portion of the Oil Pan.

8.Fill the Oil Pan with the Oil (20h) to the

???High??? mark ???A???. Add more oil when the level is to the ???Low??? mark ???B???. After lubrication, and during operation, oil splashing can be seen through the Oil

Sight Window (1f).

9.Tilt the machine head back to the table top.

Mounting the Motor

Note: The Motor is heavy. You will need a helper to hold the motor in place while tightening the Nuts (67j) on the Carriage

Bolts (70j) in step 5 on the following page.

Motor Rotation Switch

Always keep to right

Figure 6

1.The motor can be set for 110V or 220v.

Make certain that the voltage switch on the motor is set correctly for your use. This machine is set up for 110V usage. Set the 110/220V Switch to 110V (Switch to the left) unless you have your outlet changed to 220V by a qualified electrician. Rewiring of the plug and an approriate outlet is required for 220V usage.

2.The rotation of the motor can also be set to clockwise or counterclockwise rotation. This setting should always be set to the right, which makes the sewing machine pulley rotate counterclockwise.

Do not use this setting to reverse the direction of the machine. Use the Reverse Control Lever (22e) to reverse the stitch feed direction when sewing.

Main Shaft

(32b)

Slot in Tabletop for belt

Figure 7 Bobbin Winder Assembly

3.Slide the Sewing Machine Hand Wheel

(7b) onto the Main Shaft (32b) of the

Sewing Machine. Align one of the Set Screw holes (on the side of the Pulley) with the flat section of the Main Shaft.

Tighten the Set Screws (8b) enough to hold the Pulley in place, but not fully tightened.

Back of Sewing Machine

Slot with Pulley Belt

Carriage Bolts (70j)

flush with Tabletop

Back of Tabletop

Figure 8

4.Using a rubber mallet (sold separately) tap the three Carriage Bolts (70j) into the top of the Tabletop so that they are flush with the tabletop.

REV 04c; 07g, 10b

Figure 9

5.Mount the Motor to the underside of the tabletop using the Carriage Bolts (70j),

Flat Washers (69j), Spring Washers (68j), and Nuts (67j). Finger tighten only.

Aligning the Pulleys

Pulley (8j)

Figure 10

1.Place the Belt (71j) around the Sewing

Machine Hand Wheel (7b), through the slot in the table top, and around the motor Pulley (8j). Make sure the motor pulley is in line with the Sewing Machine

Hand Wheel. If you cannot get the

Pulleys to line up by sliding them slightly in either direction, you may need to turn the Motor Pulley around. To do this, loosen the Set Screw (7j) on the motor Pulley, slide the Pulley off of the motor

and turn it around. Move the belt by hand to verify that it is aligned and tracking correctly.

2.Once you have the Pulleys aligned, remove the Belt from the Sewing

Machine Hand Wheel (7b), and tighten its Set Screws (8b). Replace the Pulley and tighten the Motor Set Screw (7j).

3.Attach the Pulley Safety Cover (1j) over the motor Pulley (8j), using the Bolt (2j),

Spring Washer (3j), Flat Washer (4j), and Lock Nut (5j).

Adjusting the Belt Tension

Upper Nut (45j)

Motor Housing

Flange

Lower Nut (45j)

Belt Adjustment

Bolt (48j)

Motor

Belt (71j)

Figure 11

1.To tighten the Belt (71j) tension, turn the lower Nut (45j) on the Belt Adjustment Bolt (48j) counterclockwise, moving the nut down towards the end of the bolt enough so that the motor hangs as low as its weight allows. Turn the upper Nut (45j) counterclockwise until it tightens against the Motor Housing Flange. The proper tension is reached when the Belt can only be pushed in 1/2 inch. Test the

Belt tension. If it needs to be tighter, move the lower Nut and push the motor down. Tighten in place with the upper

Nut.

Caution: Do not tighten the Belt so much that the left side of the Sewing Machine begins to lift up from the Oil Pan.

2.Once the Belt is the proper tension, tighten both Nuts against the Motor

Housing Flange to hold the motor in place.

3.Install the Pulley Safety Cover (1j) over the motor Pulley (8j), using the Bolts (2j), Flat Washers (4j), Spring Washers (3j), and Nuts (5j).

Possible ON/OFF Control Box locations

ON/OFF Control Box shown mounted on right from underside of tabletop.

Figure 12

4.Mount the ON/OFF Control Box (63j) under the Tabletop, in one of the locations shown above, using the Wood Screws (72j) and Flat Washers (73j).

5.Connect the Treadle Joint Assembly

Mounting the Thread Stand

Figure 13

Note: The Thread Stand is designed to be mounted on the Table Stand Kit (Model 03929-sold separately). Unless indicated otherwise, all parts referred to in this set of instructions are listed in the

I - Bobbin Winder & Thread Stand Unit Parts List and Diagram. During assembly, it will be helpful to refer to that list and diagram.

Front of Tabletop

Possible ON/OFF Control Box location

Figure 14

6.Place the Washer (37i) onto the Lower

Spool Rest Rod (36i) and insert the Rod into the Thread Stand Hole in the far right back corner of the tabletop (see above). Place another Washer (37i) over the end of the Rod, and thread on and tighten a Nut (38i).

REV 04c, 05d, 10b

7.If needed, bend the Spool Support (46i) so it slides easily over the Lower Spool

Rest Rod (36i), then slide it over the Lower Spool Rest Rod, about halfway down. Insert a Bolt (31i) and Nut (47i) through the Support.

Note: The Support has tabs that hold onto the corners of the Nut to make tightening easier. When assembling, place the Nut on the side with these tabs.

8.Tighten the Screw.

9.Insert the threaded end of the Spool Pin

(40i) through one of the holes in the top of the arm of the Spool Support (46i).

Place a Washer (32i) and Nut (35i) over the end of the Pin and tighten. Place the Spool Rest (41i), Spool Mat (42i), and the Spool Vibration Stopper (39i) over the end of the Spool Pin. Repeat this step for both of the Spool Pins (40i).

10.Place the Column Pipe Connector (33i) over the top of the Lower Spool Rest

Rod (36i) until the Rod is about halfway through the Connector. Place a Bolt (34i) and Nut (35i) through the bottom hole in the Connector and finger-tighten.

11.Place the Upper Spool Rest Rod

(30i) into the top of the Column Pipe

Connector (33i). Place a Bolt (34i) and Nut (35i) through the top hole in the Connector. Tighten all of the Screws and

Nuts in the Connector.

12.Remove the Column Cap (29i) from the top of the Upper Spool Rest Rod

(30i). If needed, bend open the Thread

Hanger (28i) so it slides easily over the

Upper Spool Rest Rod. Slide the Thread

Hanger about halfway over the top of the Upper Spool Rest Rod. Insert a Bolt (31i) and Nut (47i) through the Hanger as explained in the note in step 7, above.

Tighten the Screw and place the Column

Cap over the end of the Upper Spool Rest Rod.

Mounting the Bobbin Winder

The Bobbin Winder is used to wind thread onto the Bobbin (17h). It is mounted so that it contacts the Belt (71j) when needed for bobbin winding.

Note: Unless indicated otherwise, all parts referred to in this set of instructions are listed in the I - Bobbin Winder & Thread Stand Unit Parts List and Diagram. During assembly, it will be helpful to refer to that list and diagram.

13.Set the Bobbin Winder to the ???ON??? Position - See Bobbin Winder Operation on the following page.

Mark

Pilot

Holes

Here.

Figure 15

14.Make sure the Bobbin Winder is in the ???ON??? position. Position the Base (1i)

so that the Wheel (3i) lines up with, and just touches, the belt. Mark pilot hole locations on the table through the center of each of the two channels in the Base, as indicated above.

15.Set the Base (1i) aside and drill pilot holes for each of the two marked locations. Reposition the base and secure using two Wood Screws (26i) and

Washers (27i). Leave the Screws just loose enough to allow the Base to slide.

Less than 1/8??? gap between Belt (71j) and Wheel (3i)

Belt (71j)

Wheel (3i)

Figure 16

16.Put the Bobbin Winder in the ???OFF??? position - See Bobbin Winder Operation on the following page. Slide the Bobbin Winder Assembly close to the belt until it just barely doesn???t touch it (1/8??? gap or less) - as shown above.

Tighten the Wood Screws (26i) securely.

Installing the Belt Covers

1.Install the Front Belt Cover (4h) over the Sewing Machine Hand Wheel (7b), using the Belt Cover Support (11h), the

Belt Cover Bolts (10h, 12h), and the Belt

Cover Cap (5h).

2.To install the Rear Belt Cover (7h), align the cover on the Tabletop over the back side of the opening where the Belt (71j) enters the tabletop. Mark where to drill holes. Remove the Rear Belt Cover and drill pilot holes. Secure the Rear Belt Cover in place using Wood Screws (9h).

Operation

Caution: To properly break-in your new sewing machine, and avoid possible damage to the machine, sew at

REV 07a, 10b

moderate to slow speeds for the first

15 minutes of use.

WARNING: Shut the machine off completely before working around the needle or other moving parts.

BASIC SETTINGS

You will need to make the following adjustments on a regular basis when using the machine.

Attaching the Needle

The needles supplied with the Sewing

Machine are size 90/14 (DBX1). The shank is size 16 x 257. For leatherwork use a 16 x 95 needle. This machine can accommodate a needle up to size 22.

Note: Industrial sewing machine needles have a round shank (the top part of the needle that slides up into the machine). Do not use needles, such as most home sewing needles, which have a flat area on the shank of the needle.

1.Unplug the Power Cord.

2.Select the proper needle size for the thread count and material being sewn.

3.Turn the Hand Wheel (7b) counterclockwise until the Needle Bar reaches the highest point of its stroke.

Loosen Bolt (25c)

right. Insert the Needle and push it up until it will go no farther.

5.While holding in place, securely tighten the Bolt.

Bobbin Winder Operation

The Bobbin Winder is used to wind thread onto the Bobbin. The Bobbin

Winder has two positions, ???ON??? and

???OFF???:

OFF Position

Pull tab on Connecting Rod (6i) to disengage Winder

Pull the tab on the Connecting Rod (6i) to disengage the Winder from the Belt.

The Bobbin Winder will not contact the belt.

ON Position

Press here to push Winder toward Belt

This position is with the Connecting Rod

(6i) pressed, as shown above. The Shaft on the Bobbin Winder will spin, winding thread onto the Bobbin.

Winding Thread Onto the Bobbin

Thread Guide Hole

(43i)

Setting the Bobbin into the Bobbin Case and into the Machine

Bobbin Winder Shaft (5i)

Figure 20

1.Route the Thread from the Spool, up through the Thread Guide Hole (43i), through the hole in the Thread Tension Bracket (18i), then over and under between the Tension Discs (21i).

2.Wrap the thread end around the Bobbin

(17h), overlapping it several times to secure the thread on the bobbin.

3.Place the Bobbin onto the Bobbin

to open or close the end of the Shaft so the Bobbin is snug enough to turn with the Shaft, yet can still be pulled off easily.

4.Turn on power to the Sewing Machine, press the Treadle Pedal, then the

Connecting Rod (6i) to engage the

Bobbin Winder and wind thread onto the Bobbin. When finished, release the

Connecting Rod, the Treadle Pedal and turn off power to the Sewing Machine. Cut the thread and remove the Bobbin.

B

1.After filling the Bobbin (22c) with thread, hold it so that the thread exits to the left, and push it into the Bobbin Case (21c).

2.Following Figure 22, feed the thread through slit ???A??? and pull the thread in direction ???C???. By doing so, the thread will pass under the tension spring and exit at notch ???B???.

3.Verify that the Bobbin rotates in the direction of the arrow when thread ???C??? is pulled.

4.Pull out at least 4??? of thread.

5.On the top of the machine, rotate the

Hand Wheel counterclockwise until the needle is in its topmost position.

Underside of Machine

Bobbin (22c)

Thread Rotating

Hook (20c)

Figure 23

6.Holding the Bobbin Case by the hinged latch, insert the Bobbin Case into the

Rotating Hook (20c) from the underside of the machine.

7.Release the hinged latch as the Bobbin

Case slides into place.

REV 07a, 10b

Set the spool of thread (sold separately) onto the top thread Spool Pin (40i), (the left Spool Pin), and thread it through the eyelet directly above on the Thread Hanger (28i). Guide the thread through the machine, following the steps and photos below.

Note: There are two Spool Pins (40i). The left Pin is commonly used to hold the spool of thread for the top thread (the thread that passes through the top section of the machine), while the right Pin is used to hold the spool of thread that is used for winding the bobbin.

Thread Hanger

(28i)

Spool

Pins (40i)

Figure 24

Thread Tension Discs (27a)

Take-up Spring

(9a)

Wire Needle

Bar Thread

Guide (26c)

5 (detail)

Needle Bar

Thread Guide

(24c)

Needle (23c)

wire guide

Presser

Foot (9d)

Figure 25

REV 10b

pulling it to the top of the machine. Pull both threads behind the Presser Foot, leaving at least 4??? of excess thread.

Adjusting the Stitch Length

Stitch Length

Dial (46e)

Figure 26

To increase or decrease the stitch length, turn the Stitch Length Dial (46e) to

the desired number (in millimeters) as indicated at (A) above.

Adjusting the Needle Thread Tension

Tension Adjustment

Knob (3a)

Figure 27

1.Turn Tension Adjustment Knob (3a) clockwise to increase thread tension.

2.Turn Tension Adjustment Knob counterclockwise to decrease thread tension.

Adjusting the Bobbin Thread

Tension

Figure 28

1.Using a small flathead screwdriver (sold separately), turn the Tension Adjustment

Screw on the Bobbin Case (21c) clockwise to increase bobbin tension.

2.Turn the Tension Adjustment Screw counterclockwise to decrease bobbin tension.

Raising the Presser Foot

The Presser Foot (9d) can be raised and lowered using the Presser Foot

Lever (18d) or the Knee Lifter (21g).

The Knee Lifter raises the Presser Foot momentarily (to a height of up to 1/2???), as long as it is pushed, while the Presser

Foot stays in the raised or lowered position when using the Presser Foot

Lever.

Raises

Presser

Foot

Presser

Foot Lever

(18d)

Lowers

Presser

Foot

Figure 29

1.To raise the Presser Foot, turn the

Presser Foot Lever up. The Presser Foot will go up about 1/4??? and stop.

2.To lower the Presser Foot, turn the

Presser Foot Lever down.

Setting the Presser Foot Pressure

ADVANCED SETTINGS

The Sewing Machine is set at the factory for using with jean weight materials. The following adjustments are needed only when using the machine for unusual types of fabric or when changing machine components.

These procedures should be performed only by a qualified sewing machine technician.

Adjusting the Feed Timing

Rotating Hook (20c)

Set

Screws

Figure 31

Increase Decrease

Tension Tension

Presser

Regulator

(20d)

1.Loosen the Presser Spring Regulator Nut (19d) by turning it counterclockwise.

2.Turn the Presser Regulator (20d) clockwise to increase Presser Foot pressure and counterclockwise to decrease Presser Foot pressure.

3.After adjustment, tighten the Presser

Spring Regulator Nut.

Adjusting Feed Dog Height

The Feed Dog is factory adjusted so that it juts out from the Throat Plate surface .031??? (0.8 mm) to .035??? (0.9 mm). If the Feed Dog juts out too much, puckering may result when sewing lightweight materials. To adjust the height of the Feed Dog:

Feed Bar Body

Subassembly (4e)

Figure 32

1.Loosen the Bolt (2e) of the Feed Lifting Shaft Crank (1e).

2.Move the Feed Bar Body Subassembly

(4e) up or down to make the adjustment.

3.Tighten the Bolt (2e), being careful not to overtighten.

Adjusting Needle-to-hook Timing

3.When using a DBX1 needle, align to marker line ???A??? on the Needle Bar (31c) with the bottom end of the Needle Bar Lower Bushing (27c), then tighten Bolt

(28c).

When using a DAX1 needle, align to marker line ???B??? on the Needle Bar (31c) with the bottom end of the Needle Bar

Lower Bushing (27c), then tighten the

Bolt (28c).

4.When using a DBX1 needle, loosen Rotating Hook (20c) Set Screws, turn the Hand Wheel, and align the marker line ???B??? on the Needle Bar (31c) with the bottom end of the Needle Bar Lower

Bushing (27c).

When using a DAX1 needle, align the marker line ???D??? on the Needle Bar (31c) with the bottom end of the Needle Bar Lower Bushing (27c).

5.After making the adjustments in steps 3 and 4, align the Hook Blade Point on the

Rotating Hook (20c) with the center of the Needle.

Provide a clearance of .001??? to .004??? (0.04 to 0.1 mm) between the Needle and the Hook Blade Point. This clearance is less than 1/64??? (almost touching). Securely tighten the Set Screws on the Rotating Hook. If the clearance is too small, the tip of the

Hook Blade Point will be abraded. If it is too large, it will lead to skipped stitches.

Adjusting the Presser Bar Height

Rubber Plug

(37a)

&

Presser Bar

Set Screw

(32d)

Figure 34

1.Remove and set aside the Rubber Plug (37a), and loosen the Presser Bar Set

Screw (32d).

2.Manually adjust the Presser Bar height, and the angle of the Presser Foot.

3.After adjusting, securely tighten the Set

Screw and replace the Rubber Plug.

Adjusting the Thread Take-up Stroke

Thread Take-up Thread Guide (35a)

Normal

Setting

Figure 35

1.To adjust the thread take-up stroke, loosen the Thread Guide Bolt (36a) and slide the Thread Guide (35a) to the right or left as described following:

a.When sewing heavy weight materials, move the Thread Guide (35a) to the left to increase the length of thread pulled out by the Thread Take-up Spring (9a).

b.When sewing lightweight materials, move the Thread Guide (35a) to the

REV 10bright to decrease the length of thread

pulled out by the Thread Take-up Spring.

c.The normal setting is when the marker on the Thread Guide is aligned with the center of the Bolt.

2.Tighten the Thread Guide Bolt after adjusting the Thread Guide.

Adjusting the Height of the Knee

Lifter

The standard height of the Presser Foot lifted using the Knee Lifter is 0.39 inch (10 mm).

Stud (7g)

Knee Press

Lifter Crank

(15g)

Nut (8g)

Figure 36

1.To adjust the Presser Foot lift up to 0.5 inch (13 mm), adjust the Nut (8g)

placement on the Stud (7g), on the Knee

Press Lifter Crank (15g).

Needle Bar

Thread Guide

(24c)

Presser Foot

(9d)

Figure 37

2.When the Presser Foot lift is adjusted over 0.39 inch (10 mm), be sure that the Needle Bar Thread Guide (24c) does not hit the Presser Foot (9d). This can be manually checked by turning the Hand

Wheel (7b).

Adjusting Sewing Speed with Pulleys (sold separately)

This machine is a fast running machine.

It can be adjusted to a slower running machine by changing the pulley on the motor to a smaller diameter pulley.

Consult a qualified sewing machine repair shop to replace the pulley with a

1-3/4??? or 1-1/2??? pulley to slow the speed of the machine.

Maintenance

1.Advanced Machine adjustments should only be performed by a qualified technician.

2.Check the oil level weekly when the machine is used daily. Add sewing machine oil as required to the high level marking.

3.Clean the machine with a clean, damp cloth. Do not use solvents or thinners.

4.After each use, check for lint build up and blow clean with pressurized air. Remove and discard any stray thread or fabric pieces.

5.Check the Belt (71j) tension after first use and then weekly, and adjust as described in Adjusting the Belt Tension under the assembly instructions.

6.When not in use, cover the machine and store in a clean and dry location.