Instruction Manual for Sears Kenmore Sewing Machine Model 158.10400

The Sears Kenmore Sewing Machine Model 158.10400 is a versatile mechanical sewing machine featuring multiple stitch patterns, built-in buttonholer, free arm capability, adjustable stitch length and width, reverse stitching, built-in light, and drop feed for darning and free-motion sewing. Powered by 120V AC, this machine is designed for home sewing projects with easy-to-use controls and durable construction. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation and Setup 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Stitch Selection and Patterns 7. Threading and Bobbin Winding 8. Maintenance and Cleaning 9. Accessories Included 10. Troubleshooting

Features at a Glance

Key components: Mechanical sewing head, stitch pattern dial, built-in buttonholer, free arm, reverse stitch lever, tension control, presser foot pressure adjustment, built-in light.

FeatureDescription
Stitch Pattern DialSelects from multiple built-in stitch patterns
Built-in ButtonholerAutomatic 4-step buttonhole function
Free ArmRemovable extension table for sewing cuffs and sleeves
Reverse Stitch LeverReinforces stitching at beginning and end of seams
Tension Control DialAdjusts upper thread tension for different fabrics
Stitch Length ControlAdjusts stitch length from 0-4mm
Presser Foot PressureAdjustable for different fabric thicknesses
Built-in LightIlluminates sewing area
Drop FeedLowers feed dogs for darning and free-motion work
Power PedalControls sewing speed

Installation and Setup

Unpack and inspect all components. Place on stable, level surface.

  1. Remove machine from packaging: Lift carefully from carrying case.
  2. Position machine: Place on sturdy table with adequate workspace.
  3. Connect power: Plug power cord into 120V AC outlet.
  4. Install accessories: Attach standard presser foot and thread spool pin.
  5. Insert needle: Ensure flat side faces back, tighten needle clamp screw.

WARNING! Keep fingers away from needle area during operation. Always turn off and unplug when not in use.

First-Time Operation

Prepare machine for initial use following these steps:

  1. Wind bobbin: Place thread on spool pin, follow bobbin winding path.
  2. Insert bobbin: Drop bobbin into bobbin case with thread unwinding clockwise.
  3. Thread upper path: Follow numbered threading guide from spool to needle.
  4. Select stitch: Turn pattern dial to straight stitch position.
  5. Test sew: Use scrap fabric to check tension and stitch formation.

CAUTION! Always use proper needle for fabric type. Replace bent or dull needles immediately.

Specifications

Controls and Settings

Main controls located on front and side of machine.

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

Side Controls: Tension dial, presser foot pressure adjustment, drop feed lever.

Basic Settings: Stitch length (0-4mm), stitch width (0-5mm), tension (0-9), presser foot pressure (light to heavy fabrics).

Stitch Selection and Patterns

Available stitch patterns include:

  1. Straight stitch: For basic seams and topstitching
  2. Zigzag stitch: For finishing edges and decorative work
  3. Multiple stretch stitches: For knit fabrics
  4. Decorative stitches: Various patterns for embellishment
  5. Blind hem stitch: For nearly invisible hems
  6. Buttonhole: 4-step automatic buttonhole function

Tip: Always test stitch on scrap fabric before sewing project.

Threading and Bobbin Winding

Proper threading is essential for good stitch quality.

  1. Bobbin winding: Place thread on spool pin, guide through bobbin winder tension, press pedal to wind.
  2. Upper threading: Follow numbered path from spool pin through tension discs to needle.
  3. Needle insertion: Flat side faces back, insert fully upward, tighten clamp screw.
  4. Bring up bobbin thread: Hold upper thread, turn hand wheel toward you to catch bobbin thread.

WARNING! Ensure presser foot is raised when threading upper path.

Maintenance and Cleaning

Regular maintenance ensures optimal performance.

  1. Daily: Brush out lint from bobbin area and feed dogs.
  2. Weekly: Oil moving parts with sewing machine oil (2-3 drops).
  3. Monthly: Clean tension discs with soft brush.
  4. As needed: Replace light bulb, check belt tension.

CAUTION! Unplug machine before cleaning or maintenance. Use only sewing machine oil.

Accessories Included

Troubleshooting

SymptomPossible CauseCorrective Action
Thread breakingIncorrect threading/tensionRethread completely; adjust tension; check for burrs on needle.
Skip stitchesWrong needle/damaged needleReplace needle; ensure correct needle for fabric type.
Bobbin thread bunchingIncorrect bobbin insertionRemove and reinsert bobbin; check threading path.
Machine won't runPower/pedal issueCheck power connection; ensure pedal cord is secure.
Uneven stitchesTension issuesAdjust upper and bobbin tension; clean tension discs.
Noise during operationLack of oil/lint buildupClean and oil machine; check for loose parts.

Service: For technical support, contact Sears Service Center at 1-800-469-4663.

Instruction Manual for Sears Kenmore Sewing Machine Model 158.10400 © - All Rights Reserved 2025