Hook Lubrication - Duerkopp Adler 669 Service Instructions Manual

3.1

Hook lubrication

46
1
Caution: Risk of injury!
Turn off the main switch.
Adjust the hook lubrication only with the sewing machine switched off.
Make functional test with utmost caution when the sewing machine is
running.
Standard checking
The necessary oil quantity for the correct lubrication of the hook is
factory set by the manufacturer. It may be modified, only in exceptional
cases.
The required oil quantity depends on the sewing threads to be
processed and on the fabric.
A piece of paper - preferably blotting paper - held below the hook has
to be slightly sprayed with oil when sewing approx. 1 m of sewing
thread and fabric.
Correction
–
Adjust the oil quantity with the regulating screw 1.
Turn screw counter-clockwise = increase the oil quantity
Turn screw clockwise= reduce the oil quantity.
ATTENTION!
The adjusted oil quantity only changes after a several minutes of
operation.