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2.8 Lubrication
3
18
1
5
6
Oil feed to the sewing head
The hook drive shaft 8 feeds the oil from the pan through the tube 4 to
the sewing head via spiral grooves . The window 2 over the tube
makes possible a check of the oil feed. A part of the oil fed to the
sewing head is used for the lubrication of the mechanical parts in the
sewing head. The other part of the oil runs through the tube 1 to the
filler neck. From here the arm shaft bearings and the foot stroke
mechanism are lubricated via wicks.
Oil return from the sewing head
The oil spun off in the sewing head collects in the lower part of the
sewing head where there is also the suction tube 3 with the metal filter.
Via this tube the pump 5 on the hook drive shaft sucks the oil back
again.
Oil feed to the hook
Along with the oil from the sewing head the pump 5 also sucks oil out
of the oilpan. This oil reaches the pump via a tube. A rubber gasket
prevents the tube end from lying directly on the bottom of the oilpan.
This avoids dirt particles from being sucked in which could block the
channel to the hook.
The pump transports the sucked-in oil through a pressure tube in a
channel. From here the oil reaches the hook via the oil whizzer disk.
The oil not required for lubrication of the hook flows off beforehand
through a hole in the pressure tube.
6 = Oil drain screw
7 = Viewing glass
2
7
4
8
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