Singer 601 - Operators Guide for SINGER 591;601 Machines; Introduction to SINGER 591;601 Machines; Machine Oiling Procedures; Adjusting Rotating Hook Oil Flow

5. INSTRUCTIONS FOR UTT MACHINES
1) UNDERBED THREAD TRIMMER DEVICE
PRINCIPAL PARTS
DRIVE SYSTEM OF THREAD TRIMMER
THREAD PULLER ACTION LEVER LINK
THREAD PULLER ADJUSTING BLOCK
Fig. 53