Pfaff EXPRESSION 2014, Service Manual, Page: 86 / 112

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36. Changing the top stepping motor
Note:
The stepping motor for sideways needle bar movement is only exchanged complete.
Removal:
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Remove mains lead.
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Remove detachable work support.
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Remove the housing according to the service manual.
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Remove circlip 97 on zigzag stepping motor 46 (fig. 105).
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Disengage connecting rod 99 and the tooth segment of zigzag stepping motor 46.
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Unscrew and remove both fastening screws 45.
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Lift zigzag stepping motor 46 upwards out of the retainer in the direction of the arm shaft.
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Remove the zigzag stepping motor to the front, out of the housing.
Fitting:
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Install zigzag stepping motor 46 in the housing.
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Pull power cable downward.
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Insert and tighten both fastening screws 45 (fig. 106).
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Insert the pin of connecting rod 99 in the hole of the tooth segment.
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Attach circlip 97.
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Mount the housing according to the service manual.
Note:
Having exchanged the zigzag stepping motor for sideways needle movement, adjustment of the needle
in the needle hole, section 9 must be repeated.
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Carry out a check of all functions.
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Carry out an electrical safety test in accordance with VDE 0701 using testing appliance Metra-
watt 5013.