Position Of The Lower Toothed Belt Wheel - Duerkopp Adler 669 Service Instructions Manual

2.2.2

Position of the lower toothed belt wheel

4 3 2
Caution: Risk of injury!
Turn off the main switch.
Check and set the position of the lower toothed belt wheel only
with the sewing machine switched off.
Standard checking
The screws in the toothed belt wheel 4 must sit on the flat spot 1 of the
lower shaft 5.
The toothed belt wheel must be positioned in a way that when turning
the handwheel the toothed belt 3 bears against the belt tensioner
ring 2 without being dislocated.
–
Check the position of the toothed belt wheel.
Correction
–
Pull out the toothed belt from the lower toothed belt wheel.
–
Loosen the threaded pins in the toothed belt wheel.
–
Turn the toothed belt wheel 4, until the screws sit on the flat spot of
the arm shaft 5.
–
Tighten the threaded pins in the toothed belt wheel.
–
Put the toothed belt on the toothed belt wheel again.
–
Check the course of the toothed belt.
Attention Danger of Breakage!
After replacing the toothed belt, check the following:
Hook adjustment (see chapter 2.6), feeding motion of the feed dog
(see chapter 2.3.4) and lifting motion of the feed dog (see
chapter 2.3.5).
5
1
GB
7