Janome MyLock 134D Instruction Manual

The Janome MyLock 134D is a professional 4-thread overlock sewing machine designed for home and light commercial use. It features differential feed for handling various fabrics, easy threading system, built-in rolled hem capability, adjustable stitch length and width, free arm capability, and built-in LED lighting. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Threading the Machine 7. Basic Operation 8. Stitch Applications 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 4-thread overlock capability, Differential feed system, Free arm, Built-in rolled hem, LED work light, Adjustable stitch length and width.

Feature	Description
Differential Feed	Prevents stretching or puckering on various fabrics
Rolled Hem	Built-in capability for narrow rolled hems
Free Arm	Removable flat bed for sewing cuffs and sleeves
Stitch Length	Adjustable from 1-4mm
Stitch Width	Adjustable up to 7mm
LED Light	Bright illumination of work area
Threading System	Color-coded and numbered for easy threading
Cutting Width	Adjustable cutting width for different seam types
Tension Dials	Four separate tension controls
Power Switch	On/off power control

Installation

Unpack and inspect contents. Place on stable sewing table.

Remove machine from packaging: Carefully lift machine from box.
Attach accessories: Install standard foot and needle if not pre-installed.
Connect power: Plug power cord into machine and wall outlet.
Oil machine: Apply recommended oil to designated points before first use.

WARNING! Machine is heavy; lift with care to avoid injury. Ensure stable surface placement.

First-Time Setup

Prepare machine for first use with proper threading and settings.

Install needle: Ensure flat side faces back, tighten securely.
Thread machine: Follow color-coded threading guide for upper and lower loopers.
Set tensions: Begin with recommended settings for standard fabric.
Test stitch: Use scrap fabric to test stitch quality and adjust as needed.
Adjust differential feed: Set to 1.0 for normal fabrics.

CAUTION! Always disconnect power when threading or changing needles.

Specifications

Machine Type: 4-thread overlock
Stitch Types: 4-thread safety stitch, 3-thread overlock, rolled hem
Stitch Length: 1-4mm adjustable
Stitch Width: Up to 7mm adjustable
Differential Feed: 0.7-2.0 ratio
Speed: Up to 1300 stitches per minute
Needle System: HAx1 SP
Power Requirements: 110-120V, 60Hz
Dimensions: Standard overlock machine size
Weight: Approximately 15.4 lbs (7kg)

Controls and Settings

Main controls located on machine front and side panels.

Front Panel: Power switch, Stitch length dial, Stitch width dial, Differential feed dial.

Tension Dials: Four numbered dials (1-4) for upper looper, lower looper, right needle, left needle tension control.

Stitch Length: Adjust from 1mm (short) to 4mm (long). Stitch Width: Adjust up to 7mm for wider seams. Differential Feed: Set below 1.0 for compression, above 1.0 for stretching fabrics.

Threading the Machine

Follow numbered and color-coded threading path.

Raise presser foot and lower needle.
Thread upper looper: Follow red threading path and numbers.
Thread lower looper: Follow blue threading path and numbers.
Thread needles: Follow green (right) and yellow (left) paths.
Pull threads under presser foot: Ensure 4-5 inches of thread beyond foot.

Tip: Always thread with presser foot raised to open tension discs.

Basic Operation

Standard overlock sewing procedure.

Position fabric: Place fabric under presser foot, lower foot.
Start sewing: Depress foot control gradually.
Guide fabric: Allow machine to feed fabric; do not pull or push.
Chain off: Continue sewing off fabric to create thread chain.
Trim threads: Use thread cutter or scissors to trim chain.
For rolled hem: Move stitch finger, adjust width to narrow setting.

WARNING! Keep fingers away from cutting blade during operation.

Stitch Applications

Various stitch types and their applications.

Stitch Type	Application	Settings
4-thread safety	Strong seams for woven fabrics	Needles: Both, Width: 5-7mm
3-thread overlock	Seam finishing, knit fabrics	Remove left needle, Width: 5-7mm
Rolled hem	Narrow hems on lightweight fabrics	Move stitch finger, Width: 2-3mm
Flatlocking	Decorative seams, stretch fabrics	Adjust tensions for flat appearance

Care & Maintenance

Regular maintenance ensures optimal performance.

Daily cleaning: Remove lint with brush after each use.
Weekly oiling: Apply recommended oil to designated points.
Blade care: Keep cutting blade clean and sharp.
Needle replacement: Change needles regularly or when damaged.
Professional service: Annual servicing recommended for heavy use.

CAUTION! Unplug machine before cleaning or maintenance.

Regulatory Information

UL Listed: Complies with UL safety standards. CE Certified: Meets European safety requirements. Copyright © 2025 Janome; trademarks of Janome Sewing Machine Co., Ltd. For technical support and service, visit www.janome.com or contact authorized Janome service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Thread breaking	Incorrect tension, burred needle	Check threading, reduce tension, replace needle
Fabric puckering	High differential feed, tight tension	Adjust differential to 1.0, loosen tensions
Uneven stitches	Dull blade, incorrect threading	Replace blade, rethread completely
Machine jams	Lint buildup, thread caught	Clean race area, remove tangled thread
Poor rolled hem	Incorrect settings, wrong fabric	Verify stitch finger position, use lighter fabric

Service: Contact authorized Janome service center for repairs.

Support: www.janome.com or local authorized dealer