Husqvarna Huskylock S21 / S25 Sewing Machine Service Manual

Husqvarna Huskylock S21 and S25 Technical Reference

• Built for owners and technicians servicing the 2010 Husqvarna Huskylock S21 and S25, providing technical calibration data for both models
• Official VSM Group publication P/N 104 73 00-26, dated June 3, 2010
• Contains 50 detailed mechanical diagrams, exploded-view parts illustrations, and specific setting adjustment procedures for sewing mechanics
• Indexed PDF search covers every chapter and adjustment procedure
• Laid out for standard letter and A4 printing
• This official 2010 edition serves as the master factory documentation for the Huskylock S21 and S25 launch build, detailing critical tolerances and setting specifications

Mechanical Adjustment Scope

The Husqvarna Huskylock S21 and S25 service publication provides precise parameters for essential mechanical alignments. This documentation spans the full assembly, covering basic eccentric positioning, presser bar height, and complex looper synchronization. Technicians will find specific data for chain stitch formation, differential feed calibration, and upper/lower knife timing, ensuring accurate factory-level maintenance for both serger models.

Specification Highlights

Technical data is presented for reference, with critical clearances such as the 11.3 mm needle bar distance and the 0–0.03 mm looper-to-needle threshold documented for the S21 and S25 models. Needle guard clearance is specified at 0–0.08 mm. The lower looper height is defined between 61.3 and 62.0 mm, providing clear tolerance targets. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. This 77-page OEM factory manual covers the 2010 Husqvarna Huskylock S21 and S25, documenting mechanical timing, adjustment tolerances, and electrical schematics for these specific serger units.