Setting The Machine Head; Arm Shaft Crank - Duerkopp Adler 550-12-12 Service Instructions Manual

2. Setting the Machine Head

2.1 Arm Shaft Crank

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The marking groove of the arm shaft crank and the slot A of the
adjustment disc must be in line.
Caution Risk of Injury !
Turn off main switch before adjusting.
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Insert the timing pin 1 into the marking hole and let it catch in the
marking groove of the arm shaft crank.
Instead of the timing pin any other pin or a 5 mm spiral drill can be
used.
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Check to see if, in this position, the timing pin 2 can be inserted
into position A (1 notch visible).
If not, the setting must be corrected.
Setting
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Remove the arm cover.
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Push the timing belt to the left on the upper timing belt pulley 3 and
loosen the screws.
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Arrest the adjustment disc in position A (1 notch visible) with
timing pin 2.
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Insert timing pin 1 into the marking hole and in let it catch in the
marking groove of the arm shaft crank.
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Press the upper timing belt pulley 3 gently to the right against the
timing pin 2.
Tighten both screws.
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By turning the handwheel move the timing belt to the middle of the
timing belt pulley again.
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Replace the arm cover.
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