Changing The Thread Monitor With Free-Arm Cover By Model 2044 - Pfaff expression 2014 Service Manual

39. Changing the thread monitor with free-arm cover on model 2044
Note:
The thread monitor is only exchanged complete with the free-arm cover.
Removal:
Remove the machine's mains lead.
Remove the needle and presser foot.
Remove the folding cover.
Unscrew and remove both torx screws of the housing insert.
Remove the housing insert.
Raise both lugs 1 slightly and remove the facing panel of the front housing panel.
Place the machine on its back.
Unscrew and remove the three screws in the base plate.
Tilt the bast to the front and remove both connection plugs 3 and 4 (fig. 111).
Unscrew and remove both fastening screws 5 of the free-arm cover (fig. 112).
Bring the feed-dog lowering mechanism into its normal working position.
Disengage both feed regulators 6 using a small screwdriver (fig. 112).
Remove the cable clip.
Remove connection plug 16 from the circuit board of the front housing panel and pull the cable
downward (fig. 113).
Remove the free-arm cover with the thread monitor from the housing to the left.
Fitting:
Install the new free-arm cover with thread monitor and secure with both fastening screws 5 (fig. 112).
Bring the feed-dog lowering mechanism into its normal working position.
Engage both feed regulators 6 (fig. 112).
Place the cable, using a spring hook, between the motor and the housing.
Mount connection plug 16 onto the circuit board of the front housing panel (fig. 113).
Attach the cable clip.
Mount both connection plugs 3 and 4 onto the circuit board of the base plate (fig. 111).
Fold the base plate to the machine and secure with the three fastening screws.
Mount the facing panel onto the front housing panel.
Insert the housing insert and secure with both torx screws.
Attach the folding cover.
Attach the mains lead.
Carry out a test of the thread monitor with an empty and a full bobbin.
Carry out an electrical safety test in accordance with VDE 0701 using testing appliance Metra-
watt 5013.
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