90
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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