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6. Machine Works Heavily
Cause:
Remedy:
Hook raceway lacks oil or is obstructed by
Clean and oil hook raceway.
pieces of thread.
Mechanism clogged by inferior oil.
Use only Pfaff sewing machine oil
—
never salad oil or glycerine.
Bobbin winder working while sewing.
Stop bobbin winder.
7. Motor idles
Cause:
Remedy:
Motor disengaging lever raised.
Flick lever down (see page 5).
Thread Jamming
The Pfaff rotary hook will not normally jam, even if the machine should be handled improperly. If thread should happen
to jam in the hook raceway, the power of the motor in most instances will be sufficient to overcome hard working of
the mechanism.
If this action should not free the jammed thread put a drop of kerosene into the hook raceway, jerk the balance wheel
back, then rock it back and forth.
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