58
25. Dismantling and assembling the sewing hook
Removal:
● Remove the needle.
● Unscrew the presser foot.
● Remove the bobbin case.
● Unscrew the bobbin case position finger.
● Take out the three screws with springs from behind (fig. 69).
● Remove the bobbin case base with sewing hook gib (fig. 70).
● Turn the sewing hook gib to the left or to the right out of the bobbin case base (fig. 71).
● Clean the sewing hook, bobbin case base and hook gib.
Fitting:
● Turn the handwheel until the opening of the sewing hook faces to the left (fig. 72).
● Turn the sewing hook gib to the left into the bobbin case base (fig. 73.).
● Insert the bobbin case base complete with sewing hook gib into the sewing hook (fig. 74).
● Fasten the sewing hook gib from behind with three screws with springs (fig. 69).
● Screw on and adjust the bobbin case position finger.
26. Cleaning and oiling the machine
Note:
The machine is equipped with oil-soaked calotte bearings and is therefore maintenance-free for the user.
Only the sewing hook should be lubricated once in a while with normal sewing machine oil.
After repair work, the mechanic should oil the machine with BP Energol HLP 46 or HLP 80 and the
sewing hook with normal sewing machine oil.
Calotte bearings or parts must not be cleaned with gasoline, petroleum, kerosene, thinners, trichlorethy-
lene etc.
Dirty or clogged calotte bearings or parts may only be cleaned mechanically by brushing them off.
They are then to be oiled with BP Energol HLP 46 or HLP 80.
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