Husqvarna Huskylock S21 / S25 Sewing Machine Service Manual (P/N 104 73 00-26)

This 77-page official VSM Group publication (P/N 104 73 00-26, dated June 3, 2010) serves as the master factory documentation for the Husqvarna Huskylock S21 and S25 launch build. It provides the critical tolerances and setting specifications essential for everyday workshop diagnostics.

• Delivers technical calibration data tailored for both 2010 serger models
• Features 50 detailed mechanical diagrams and exploded-view parts illustrations
• Outlines exact setting adjustment procedures for complex sewing mechanics

Mechanical Adjustment Parameters

The service publication breaks down precise guidelines for essential mechanical alignments across the entire assembly. Need specific data for chain stitch formation or differential feed calibration? It is all documented here. Technicians can reference thorough details on looper synchronization, basic eccentric positioning, and upper/lower knife timing. Having this data on hand ensures accurate, factory-level maintenance rather than relying on guesswork during bench repairs.

Specification Highlights

Technical data is laid out for direct reference during bench work. The manual documents critical clearances, including the 11.3 mm needle bar distance and the strict 0–0.03 mm looper-to-needle threshold. You will also find the needle guard clearance specified at 0–0.08 mm, alongside the lower looper height defined between 61.3 and 62.0 mm. Always follow standard workshop safety protocols and verify these targets against primary manufacturer guidelines before executing any mechanical adjustments.