Dürkopp Adler 513 Operating Instructions Manual page 26

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4. Always adjust the clearance between the hook and the needle
after changing to a different needle thickness ( Service
Instructions).
Otherwise, the following errors can occur:
• Changing to a thinner needle:
Skip stitches, thread damage
• Changing to a thicker needle: Damage to the hook tip,
damage to the needle
Operating Instructions 513/533 - 01.0 - 09/2023
Operation