Duerkopp Adler 745-26 Service Instructions Manual page 101

Caution Risk of Injury !
Turn the main switch off.
Set the trimming and clamping device for the underthreads only with
the main switch turned off.
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Loosen screw 7.
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Align the opening of the underthread shears 1 centered to the
thread grooves of the needle plate.
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Tighten screw 7.
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Loosen screw 6.
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Set the underthread shears 1 higher or lower.
The top of the underthread shears must lie level with the top of the
needle plate.
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Tighten screw 6.
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Align the spring clamping plates 5.
The spring clamping plates must lie flat and with light spring
pressure on the needle plate wall.
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Check the safety clearance of the hook points to the pneumatically
opened spring clamping plates.
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If necessary, align the limit plates 4 accordingly.
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Regulating the air jet for the cleaning of the underthread shears.
The compressed air supply occurs via the connection 8.
The throttle valve lies directly on the solenoid valve.
The stitch formation should not be disturbed by the air jet.
Light sewing pieces (e.g. lining materials) should not be blown up
on the needle plate.
Reduce the air jet accordingly.
6
7
8
Replacing the underthread shears
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Loosen screw 6.
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Remove the pressure spring.
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Remove the knife along with the guide rail.
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