Beisler 739-23-1 Manual - Manual (Page 9)

2.2 Replacement of needle
Caution: risk of injury!
Switch off main switch.
Never replace needle while the main switch is on.
– Loosen screw 1 and remove needle from the needle bar 2.
– Insert new needle to the stop in the hole in the needle bar 2.
Caution!
The needle scarf must face away from the operator and towards the
hook.
– Tighten screw 1.
1-9
2 1