Kenmore 1230 / 1240 / 1250 Sewing Machine Service Manual
Covers Kenmore 1230, 1240, and 1250 Zig-Zag sewing machines. Includes operation, maintenance, and troubleshooting. Ref: 52917
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Models Covered & Key Technical Specifications
Kenmore 1230 / 1240 / 1250 (52917) -- Manual Kenmore 1230 / 1240 / 1250 Sewing Machine Manual Engineering Registry | Portfolio
- Reference Clearance Data: 10 mm establishes the minimum overlap for stitching.
- Integral End Play: 0.05 mm is the maximum acceptable end play for smooth operation.
- General Power Draw: 50 W signifies the average power consumption during normal use.
- Certified Print Rate: 12 stitches per inch is the standard rate for most applications.
- Factory Precision Specs: 0.1 mm tolerance is maintained for critical component alignment.
- Established Holding Capacity: 10 N maximum force is applied to the thread tension discs.
Professional Workshop Service Manual & Technical Specifications
Detailed Kenmore 1230, 1240 and 1250 Sewing Machine Manual: Maintenance & Repair Procedures Chassis-Documentation
Series-Validation: 1230, 1240, 1250 // Coverage-Scope: Sewing Machine / Household Logic // Series-Validation: Comprehensive Operation and Maintenance.
Technical Specs Table
| Assessment-Element | Technical-Path | Context |
|---|---|---|
| Machine Model | 1230, 1240, 1250 | Specific units covered |
| Manual Type | Instructions | Guidance document |
| Primary Function | Zig-Zag Sewing | Stitching capability |
Table of Contents Summary
- Identifying Parts
- Threading Top Thread
- Adjusting Bobbin Tensions
- Checking Performance Problems
- Parts List
- Sewing Light
Fundamentally requiring a thorough understanding of its mechanisms, this manual details the operational procedures and maintenance schedules for the Kenmore sewing machines, models 1230, 1240, and 1250. It provides step-by-step guidance on assembly, threading, stitch adjustments, and routine cleaning, ensuring optimal performance and longevity.
Component locations are identified for various parts of the machine, including the front and back views, with numbered diagrams for easy reference. Key controls such as the top tension control, stitch length, and stitch width are thoroughly explained.
Service procedures are documented for common tasks like winding the bobbin, threading the bobbin case, and installing the machine. Diagrams illustrate each step clearly.
Calibration requirements are specified for various stitches, including straight stitch, zigzag stitch, and special finishing stitches like blind hemming and satin stitching. Settings for models 1240 and 1250 are detailed.
Electrical system documentation covers the sewing light and power switch operation. Instructions for bulb replacement are also provided.
Suspension service documentation covers presser foot adjustments, feed dog control, and seam guides, ensuring proper fabric feeding and guidance during sewing.
This manual documents torque specifications for fastener fatigue prevention, though specific values are not provided in this section. It also outlines procedures for checking performance problems, offering probable causes and corrections for common issues like irregular stitches, breaking needles, and fabric not moving.
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