Installing Machine Head; Inserting Machine Head; Fitting The Keys; Placing And Tensioning The V-Belt - DURKOPP ADLER 381 Installation Instructions Manual

5. Installing machine head

5.1 Insert machine head
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Insert machine head 1 into the cut-out of the table top.

5.2 Fitting the keys

The tension plate has 3 threaded holes for fastening the keys.
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Fasten the key 11 to the tension plate by 2 screws as shown in the illustration on
side 10. Two screws are included in the accessories.
2 positions are possible. In the right hand position there is more space at the lever
for connecting and disconnecting the needles.
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Remove the bobbin cover and pass the incoming cable through its duct.
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Pass the plug through the table top cut-out and introduce into the bush B3 of the
drive controller.

5.3 Placing and tensioning the V-belt

Remove the safety devices
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Remove the belt guard cover 6 from the sewing motor.
Place V-belt in position and fit belt guard 3 on the machine head
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Fasten belt pulley 8 (in the accessories) on the shaft of the sewing motor.
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Place the V-belt 4 through belt guard on the belt pulley 2 of the machine head.
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Pass the V-belt 4 down through the cut-out in the table top.
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Tilt the machine head backwards.
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Place the V-belt 4 onto the belt pulley 8 of the sewing motor.
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Return the machine head into its initial position..
When tilting, the belt guard should freely enter the cut-out in the table top.
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Screw up the belt guard on the machine head.
Tensioning the V-belt
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Loosen the screw 7 on the base of the sewing motor.
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Tension the V-belt by swinging the sewing motor 9.
When the tension of the V-belt is correct and when the belt is pressed in its middle
(without any excessive force) it must yield inwards about 10 mm.
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Re-tighten the screws 7.
9