Pfaff EXPRESSION 2014, Руководство по обслуживанию, Страница: 70 / 112

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Fitting:
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Insert the new hook driving shaft with bevel gear 56 in the sewing hook bearing (fig. 82).
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Mount sewing hook 52 with the plastic disk on the sewing hook bearing and set it.
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Fasten the sewing hook bearing using both screws 111 (fig. 83).
Note that the sewing hook bearing is fastened parallel to the housing.
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Push the hook driving shaft to the left until circlip 112 rests against the lower right calotte bearing 92.
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Place the hole of lifting eccentric 109 above the surface of hook driving shaft 28.
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Swivel in screw 57 of lifting eccentric 109 and fasten slightly.
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Press lower flat-toothed belt socket 94 to the right against calotte bearing 92.
At the same time tighten one of screws 29.
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Check that the hook driving shaft has zero play and moves free of binding.
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Tighten all three screws 29 of the lower flat-toothed belt socket.
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Slightly loosen screw 57. Push the bevel gear and lifting eccentric 109 to the left until it rests on bevel
gear 56 without any play.
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Tighten screw 57 on the surface of hook driving shaft 28 (fig. 83).
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Screw in dog-point screw 108 into feed eccentric 5 or the hook driving shaft.
Note:
Dog-point screw 108 must always protrude from feed eccentric 5 on the opposite side of screw 57 in
lifting eccentric 109.
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Insert cylindrical pin 12 and fasten with the clamping plate.
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Adjust the feed driving shaft according to section 2a.
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Fit pin 23 with the washer situated to the left of the pull rod without any play.
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Tighten screw 22.
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Pull the feed dog to the front.
Important:
The complete feed driving shaft with top feed must slide slowly to the rear.
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Fit slide block 8 with the spring on the pin and insert into slide was in the correct curve radius.
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Check that the slide block can be moved easily without play or binding in the slide way.
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Push link 7 complete with feed regulator 6 to the right onto the connecting bar pin.
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Turn feed regulator 6 to the rear and then over feed eccentric 5 from the top.
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Insert screw 4 with clamping plate 21 and tighten slightly.
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Shift stud 20 laterally until link 7 and connecting bar 19 only have a slight play and are freely movable.
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Tighten screw 4.
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Fit spring 3.
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Fit the feed dog lowering mechanism.