Pfaff EXPRESSION 2014, Service Manual, Page: 66 / 112

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Adjusting the machine:
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Tilt the machine towards the rear.
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Disconnect spring 3 (fig. 80).
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Unscrew and remove screw 4.
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Turn the handwheel until the lobe of feed eccentric 5 is at the rear.
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Fold feed regulator 6 downward and remove it with link 7 to the left from feed bar pin.
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Check that the slide block can be moved easily without play or binding into the slotted lever.
If necessary, adjust according to section 2 a.
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Fold feed regulator 6 to the rear and then upward over feed eccentric 5.
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Insert screw 4 into clamping plate 21 and tighten just a little.
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Push pin 20 to the side until lever 7 and driving bar 19 still have a little play and move easily.
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Tighten screw 4.
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Attach spring 3.
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Loosen the three screws 29 in the lower flat-toothed belt sprocket 94.
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Bring the needle bar to its lowest position by turning the handwheel.
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Fit spacer (63-102 600-18) on the needle bar and push up against the needle bar frame.
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Push needle rise clamp (61-111 600-35) on the needle bar.
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Push 2 mm feeler gauge (00-870 136-01) with its cutout on the needle bar above the needle rise
clamp.
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Loosen the needle rise clamp and push the 2 mm feeler gauge upward against the spacer.
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Tighten the milled screw on the needle rise clamp.
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Turn the handwheel back and forth.
If there is any play at the feeler gauge, repeat this procedure.
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Remove the 2 mm feeler gauge.
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Turn the handwheel in the normal direction until the needle rise clamp rests on the spacer.
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Hold the handwheel at this position.
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Turn hook driving shaft 28 in the normal direction until the pin gauge can be inserted in the hole of feed
eccentric 5 and pins 27 (fig. 80).
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Insert the pin gauge and tighten one of the screws 29.
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Remove the pin gauge, needle rise clamp and the spacer and tighten all three screws 29.
Note:
On having tightened the screws 29, there must not be any play between the lower flat-toothed belt
sprocket 92 and calotte 95.
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Check section 4 "Adjustment of the feed dog height".
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Carry out section 5 "Adjustment of the synchronizer".
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Carry out section 12 "Sewing hook timing".
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Insert the buttonhole sensor.
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Attach the free-arm cover and fasten with both fastening screws 5.
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Bring the feed-dog lowering mechanism to the normal working position.