Thread Pulling Knife - Duerkopp Adler 550-867 Service Instructions Manual

2.11.3

Thread pulling knife

14 1
Caution: Risk of injury!
Turn off the main switch.
Check and set the thread-pulling knife only when the machine is
switched off.
ATTENTION!
The sewing machine must not be used without the thread-pulling
knife.
The back stop (anti-rollback) for the bobbin case 2 is situated on the
thread pulling knife.
Standard checking
In the thread-pulling knife's 1 resting position the distance between
the control cam 4 (highest point) and the roller 7 should be # 0.1 mm.
At the same time the control cam 4 has to bear on the clamping ring 5.
In the resting position the marking 14 of the thread-pulling knife 1
should face the blade of the counter-knife 2.
The thread-pulling knife carrier 3 must not have any end play but
should move freely.
–
Check whether the control cam 4 bears on the clamping ring 5.
–
Turn the machine until the control cam's 4 highest point points to
the roller 7.
–
Check the distance between the control cam 4 and the roller 7.
3
7 5 4
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