Pfaff 1222 Sewing Machine Repair Manual
The Pfaff 1222 is a high-quality mechanical sewing machine known for its durability and precision stitching. This repair manual covers disassembly, troubleshooting, maintenance, and reassembly procedures for common issues including tension problems, feed dog malfunctions, motor issues, and timing adjustments. Below are comprehensive sections for repair procedures, parts identification, and maintenance guidelines.
Machine Overview
Key components: Mechanical drive system, built-in stitch patterns, drop feed, free arm capability, built-in buttonholer.
| Component | Description |
|---|
| Stitch Selector | Dial for selecting straight, zigzag, and decorative stitches |
| Tension Assembly | Upper thread tension control with numbered dial |
| Bobbin Case | Front-loading horizontal bobbin system |
| Feed Dogs | Adjustable fabric feeding mechanism |
| Presser Foot | Quick-change system with various foot options |
| Handwheel | Manual control with reverse stitch capability |
| Motor | Standard AC motor with foot pedal control |
| Light | Built-in work area illumination |
| Reverse Lever | For backward stitching reinforcement |
| Stitch Length Dial | Adjusts stitch length from 0-4mm |
Tools Required
Essential tools for Pfaff 1222 repair and maintenance.
- Screwdrivers: Phillips #1, #2 and flathead 3mm, 5mm
- Needle-nose pliers and tweezers
- Small hammer and soft mallet
- Lint brush and compressed air
- Sewing machine oil and grease
- Timing gauge and feeler gauges
- Multimeter for electrical testing
WARNING! Use proper tools to avoid damaging delicate components.
Safety Precautions
Always follow safety procedures when repairing sewing machines.
- Unplug machine before any disassembly
- Remove needle to prevent injury
- Work on clean, well-lit surface
- Keep small parts organized in containers
- Wear safety glasses during disassembly
CAUTION! Electrical shock hazard - always disconnect power before servicing.
Disassembly Procedures
- External Covers: Remove 4 screws from top cover, lift carefully
- Handwheel: Remove setscrew, pull wheel straight off
- Stitch Selector: Remove knob and underlying mechanism
- Motor Mount: Loosen mounting bolts, disconnect wires
- Feed Mechanism: Remove feed dogs and related components
- Bobbin Assembly: Remove race cover and hook assembly
- Tension Assembly: Disassemble spring and tension discs
Common Issues & Solutions
Frequent problems and their repair procedures.
| Symptom | Possible Cause | Repair Procedure |
|---|
| Thread bunching | Timing/tension issues | Adjust hook timing; clean tension discs |
| Skip stitches | Needle/bent hook | Replace needle; inspect and replace hook if bent |
| Motor hums but won't run | Seized mechanism | Check for thread jams; lubricate moving parts |
| Uneven feeding | Worn feed dogs | Replace feed dogs; check feed mechanism |
| Noisy operation | Lack of lubrication | Clean and oil all moving parts |
Timing Adjustment
Proper needle-hook timing is critical for good stitch formation.
- Remove needle plate and bobbin case
- Rotate handwheel to bring needle to lowest position
- Check hook point should align with needle eye
- Adjust by loosening hook drive gear setscrew
- Rotate hook to proper position and retighten
- Test with scrap fabric
Tip: Use timing gauge for precise alignment.
Tension System Repair
Upper and lower tension systems maintenance.
- Upper Tension: Disassemble tension discs, clean with alcohol
- Check tension spring for proper tension and replace if weak
- Lower Tension: Adjust bobbin case tension screw
- Test tension with balanced thread on both sides
- Replace worn tension washers and springs
WARNING! Small springs under tension - disassemble carefully.
Feed Mechanism
Feed dog and related component repair.
- Remove needle plate and feed cover
- Inspect feed dogs for wear or damage
- Check feed crank and connecting rod
- Adjust feed height for proper fabric contact
- Lubricate feed mechanism pivot points
- Replace worn feed dogs and related parts
Motor & Electrical
Motor maintenance and electrical system troubleshooting.
- Motor Brushes: Replace when worn to 1/4 inch
- Foot Pedal: Check for worn wires and proper operation
- Light Bulb: Standard sewing machine bulb replacement
- Wiring: Inspect for frayed or damaged insulation
- Power Cord: Check for continuity and secure connections
CAUTION! Always unplug before electrical work.
Lubrication Guide
Proper lubrication points and schedule.
- Hook race and rotating parts: Light sewing machine oil
- Gears and cams: Special sewing machine grease
- Motor bearings: One drop of oil annually
- Feed mechanism: Oil pivot points monthly
- Handwheel bearing: Light oil occasionally
WARNING! Over-oiling can attract lint and cause problems.
Reassembly & Testing
Final assembly and operational testing procedures.
- Reassemble in reverse order of disassembly
- Lubricate all moving parts before final assembly
- Check all adjustments: timing, tension, feed
- Test with scrap fabric of various weights
- Verify all stitches and functions work properly
- Clean exterior and apply final inspection
Service: For professional service, contact authorized Pfaff service centers.
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