68
Fitting:
• Insert the new hook driving shaft with bevel gear 59 in the sewing hook bearing (fig. 71).
• Mount sewing hook 56 with the plastic disk on the sewing hook bearing and set it.
• Fasten the sewing hook bearing using both screws 121 (fig. 70).
Note that the sewing hook bearing is fastened parallel to the housing.
• Push the hook driving shaft to the left until circlip rests against the lower right calotte bearing 104.
• Place the hole of lifting eccentric 119 above the surface of hook driving shaft 28.
• Swivel in screw 60 of lifting eccentric 119 and fasten slightly (fig. 71).
• Press lower flat-toothed belt socket 102 to the right against calotte bearing 104 (fig. 70).
• At the same time tighten one of screws 29.
• Check that the hook driving shaft has zero play and moves free of binding.
• Tighten all three screws 29 of the lower flat-toothed belt socket.
• Slightly loosen screw 60 (fig. 71).
• Push the bevel gear and lifting eccentric 119 to the left until it rests on bevel gear 59 without any play
(fig. 70 and 71).
• Tighten screw 60 on the surface of hook driving shaft 28.
• Screw in dog-point screw 118 into feed eccentric 5 or the hook driving shaft (fig. 70).
Note:
Dog-point screw 118 must always protrude from feed eccentric 5 on the opposite side of screw 60 in
lifting eccentric 119 (fig. 70 and 71).
• Insert cylindrical pin 12 and fasten with the clamping plate (fig. 70).
• Adjust the feed driving shaft according to section 2.
• Fit pin 23 with the washer situated to the left of the pull rod without any play.
• Tighten screw 22.
• Pull the feed dog to the front.
Important:
The complete feed driving shaft with top feed must slide slowly to the rear.
• Fit slide block 8 with the spring on the pin and insert into slide way in the correct curve radius.
• Check that the slide block can be moved easily without play or binding in the slide way.
• Push link 7 complete with feed regulator 6 to the right onto the connecting bar pin.
• Turn feed regulator 6 to the rear and then over feed eccentric 5 from the top.
• Insert screw 4 with clamping plate 21 and tighten slightly.
• Shift stud 20 laterally until link 7 and connecting bar 19 only have a slight play and are freely
movable.
• Tighten screw 4.
• Fit spring 3.
• Fit the feed dog lowering mechanism.
• Attach spring 9.
• Set the base plate against the machine.
• Mount the three connection plugs 4, 5 and 6 on the circuit board.
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