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Setting the safety snap-on coupling
18 Setting the safety snap-on coupling
The safety snap-on coupling disengages in the event of the thread jam-
ming and thus prevents the hook from being misadjusted or damaged.
18.1 Attaching the safety snap-on coupling
Correct setting
The four setscrews (1) on the two adjusting rings next to the safety snap-
on coupling (3) must be parallel to one another. After the coupling has dis-
engaged, they are no longer parallel.
Cover
• Tilt the upper section ( 3.3.1 Access to the machine bottom section,
Fig. 55: Attaching the safety snap-on coupling
Setting steps
1. Fix a setscrew (1) of the left adjusting ring (2), with an Allen key, for
2. Turn handwheel until the safety snap-on coupling (3) engages.
The setscrews (1) are parallel to each other.
Service manual 567 classic - 01.0 - 10/2015
WARNING
Risk of injury.
Crushing injuries from moving parts.
Switch off the sewing machine before you reattach
the safety snap-on coupling after the thread has
jammed.
page 10)
①
(1) - Setscrews
(2) - Left-hand adjusting ring
example.
② ③ ④
(3) - Safety snap-on coupling
(4) - Right-hand adjusting ring
65
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