Dürkopp Adler M-Type 869 Serviceanleitung Seite 11

2.2 Top and bottom sprocket belt wheel/ tooth belt
2.2.1 Position of the top sprocket belt wheel
4 3 2
Caution: Danger of injury!
Turn off the main switch.
Only check and adjust the position of the top sprocket belt wheel
when the machine is switched off.
Standard checking
The sprocket belt wheel 2 is fitted to the arm shaft 4 with two screws.
The screws must be seated on the flat spot 1.
The distance between the sprocket belt wheel 2 and the bobbin
winder wheel 3 must be 0.8 mm when the bobbin winder is out of
action.
–
Check the distance between the sprocket belt wheel 2 and the
bobbin winder wheel 3 with a feeler gauge.
Correction
–
Undo the grub screws on the sprocket belt wheel.
–
Turn the sprocket belt wheel until the screws sit on the flat spot 1
of the arm shaft.
–
Set the lateral distance of 0.8 mm between the sprocket belt
wheel 2 and the bobbin winder wheel 3 with a feeler gauge.
–
Tighten the grub screws on the sprocket belt wheel.
1
GB
7