Dürkopp Adler 869 Operating Instructions Manual page 156

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Connecting the maintenance unit to the sewing machine head
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Unscrew the cap 6.
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Connect hose 3 (in accessory pack) with the distributor plate 7
located on the machine head.
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Screw the cap 6 back on.
Setting the operating pressure
The operating pressure is 6 bar.
It can be read using the pressure gauge 4.
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In order to set the pressure, pull up on the turning handle 2 and
turn.
In order to raise the pressure, turn the handle 2 clockwise. In order
to decrease the pressure, turn the handle 2 counter-clockwise.
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