singer sewing machine model 604 manual

The Singer Model 604 is a versatile mechanical sewing machine known for its durability and range of built-in stitches. It features a free arm, drop feed for darning and free-motion sewing, built-in buttonholer, and multiple stitch patterns. This manual covers safety, features, setup, operation, maintenance, and troubleshooting for optimal use.

Features at a Glance

Key components: Mechanical sewing head, free arm, stitch pattern dial, built-in buttonholer, reverse stitch lever, tension control, and drop feed mechanism.

Unpacking and Setup

Carefully unpack all components. Place machine on a stable, level surface.

1. Remove protective packaging and foam inserts.
2. Attach power cord to machine and plug into a 120V AC outlet.
3. Install foot controller into designated port.
4. Attach presser foot by lowering presser foot lever and snapping foot into place.
5. Ensure handwheel turns freely by rotating it toward you.

WARNING! Keep fingers away from needle area during setup. Ensure machine is unplugged when attaching accessories.

First-Time Operation

Before sewing, thread the machine and wind a bobbin.

1. Raise presser foot and needle to highest position using handwheel.
2. Follow threading guide printed on machine: from spool pin through tension discs to needle.
3. Wind bobbin using built-in winder: place empty bobbin on winder, guide thread, engage clutch.
4. Insert bobbin into bobbin case with thread pulling counterclockwise.
5. Select straight stitch, medium length (2.5), and test on fabric scrap.

CAUTION! Always start with needle in highest position. Keep foot controller accessible.

Specifications

• Type: Mechanical Free-Arm Sewing Machine.
• Stitches: 6 built-in patterns (straight, zigzag, blind hem, stretch, decorative).
• Buttonhole: One-step automatic.
• Stitch Length: 0-4 mm adjustable.
• Stitch Width: 0-5 mm adjustable.
• Max Sewing Speed: 750 stitches per minute.
• Feed System: Drop feed with adjustable presser foot pressure.
• Bobbin: Class 15 transparent bobbin.
• Needle: Standard domestic needle system 130/705 H.
• Power: 120V AC, 60Hz, 0.7A.
• Weight: 12.5 lbs (5.7 kg).

Controls and Functions

Main controls located on front and side of machine.

Front Panel: Stitch pattern dial, stitch length dial, stitch width dial, reverse stitch lever, tension control dial.

Side: Handwheel, bobbin winder spindle and clutch, presser foot lever, drop feed lever.

Operation: Turn handwheel toward you only. Use foot controller for speed. Reverse lever held down for backstitching. Drop feed lever lowers feed dogs for free-motion work.

Stitch Selection and Settings

Use stitch pattern dial to select stitch. Adjust length and width as needed.

1. Straight Stitch: For seams. Use length 2.5 for medium weight fabrics.
2. Zigzag Stitch: For finishing edges, appliqué. Adjust width for desired zigzag.
3. Blind Hem Stitch: For nearly invisible hems. Use with blind hem foot.
4. Stretch Stitch: For knits and elastic fabrics.
5. Decorative Stitches: Use for embellishment. Refer to stitch guide.
6. Buttonhole: Select buttonhole symbol. Place button in foot; machine sews automatically.

Tip: Always test stitch settings on a fabric scrap before starting your project.

Threading and Bobbin Winding

Correct threading is essential for proper stitch formation.

1. Raise presser foot to open tension discs.
2. Place spool on spool pin. Guide thread through thread guide on top, down to tension assembly, up through take-up lever, down to needle.
3. Thread needle from front to back.
4. Bobbin Winding: Disengage clutch by pulling handwheel outward. Place bobbin on winder, guide thread, press foot controller. Stop when full.
5. Insert bobbin into case so thread unwinds counterclockwise.

WARNING! Ensure machine is off when threading. Follow numbered guides exactly.

Maintenance and Cleaning

Regular cleaning prevents lint buildup and ensures smooth operation.

1. Unplug machine before any maintenance.
2. Remove needle plate screws; lift plate to access feed dogs and bobbin area.
3. Use small brush to remove lint from feed dogs, bobbin case, and race.
4. Oil moving parts per diagram in manual with sewing machine oil only.
5. Wipe exterior with soft, dry cloth.

CAUTION! Do not use compressed air; it can force lint deeper. Never spray lubricants.

Safety Information

Always follow safety precautions to prevent injury.

• Unplug machine when not in use, during threading, changing needle, or cleaning.
• Keep fingers away from moving needle. Use a seam ripper or tweezers, not fingers, to guide fabric.
• Do not sew over pins; remove them as you sew.
• Use correct needle type and size for fabric. Replace bent or dull needles immediately.
• Ensure adequate lighting and keep work area clear.

Troubleshooting

Service: For persistent issues, contact authorized Singer service center. Refer to warranty information.