Janome MyLock 134D Serger Manual

The Janome MyLock 134D is a 3/4 thread serger with differential feed, built-in rolled hem capability, color-coded threading system, free arm capability, and built-in thread cutter. It features adjustable stitch length (1-4mm), stitch width (3-7mm), and presser foot pressure. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Color-coded threading system, differential feed mechanism, free arm, built-in rolled hem, stitch length/width controls, built-in thread cutter.

Unpacking and Setup

Unpack and inspect all contents. Place on stable sewing table.

1. Remove protective packaging and foam inserts
2. Attach power cord to serger and plug into outlet
3. Install foot controller in accessible position
4. Place serger on clean, level surface
5. Install accessory box and thread spools

WARNING! Serger is heavy; lift with care to avoid injury. Ensure all packaging is removed before operation.

First-Time Operation

Power on serger; follow threading guide.

1. Thread upper and lower loopers following color-coded guides
2. Thread needles with recommended thread types
3. Test stitch on scrap fabric before beginning project
4. Adjust stitch length and width as needed
5. Practice with differential feed settings

CAUTION! Keep fingers away from moving needles. Always use the handwheel to position needles.

Specifications

• Type: 3/4 Thread Serger with Differential Feed
• Stitch Length: 1-4mm adjustable
• Stitch Width: 3-7mm adjustable
• Differential Feed Ratio: 0.7-2.0
• Speed: Up to 1300 stitches per minute
• Rolled Hem: Built-in capability
• Free Arm: Yes, included
• Power Source: 120V AC, 60Hz
• Weight: Approximately 15.4 lbs (7 kg)
• Accessories: Foot controller, accessory kit, needles, spool caps

Controls and Settings

Access controls via front panel and side dials. Front Panel: Power switch, LED light, stitch length dial, stitch width dial.

Side Controls: Differential feed dial, upper looper tension, lower looper tension, needle tension, presser foot pressure.

Stitch Settings: Overlock stitches (3-4 thread), rolled hem, flatlocking. Tension: Adjustable for each thread path (upper looper, lower looper, needles). Feed: Differential feed control for stretch and delicate fabrics.

Threading the Serger

Follow color-coded threading path for proper operation.

1. Turn power off before threading
2. Follow numbered threading sequence (1-4)
3. Use color-coded guides for each thread path
4. Ensure threads are properly seated in tension discs
5. Pull threads under presser foot before starting

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

Stitch Selection and Adjustment

Supports overlock stitches, rolled hem, and flatlocking.

1. Select stitch type by adjusting looper positions
2. Set rolled hem by moving stitch finger
3. Adjust stitch length for fabric type and purpose
4. Modify stitch width as needed
5. Use differential feed for challenging fabrics
6. Test settings on fabric scrap before sewing project
7. Adjust tensions for balanced stitches
8. Use appropriate presser foot for each stitch type

WARNING! Never force fabric through serger. Let feed dogs move fabric naturally.

Maintenance and Cleaning

Unplug before cleaning. Remove lint buildup regularly with brush.

1. Clean race hook and feed dogs after each project
2. Oil moving parts as recommended in manual
3. Wipe exterior with soft, dry cloth
4. Store with cover when not in use
5. Replace needles regularly

CAUTION! Do not use compressed air for cleaning. Keep liquids away from electrical components.

Regulatory Information

UL Listed: Complies with safety standards for household sewing machines. Copyright © 2025 Janome; trademarks of Janome America, Inc. For support, visit www.janome.com or contact 1-800-631-0183.

Troubleshooting

Reset: Unplug for 30 seconds if electronic issues occur.

Service: 1-800-631-0183; www.janome.com