Repair instructions – Pfaff 1540 User Manual
Page 77
75
Repair Instructions
42. Removing and fitting the needle thread tension
Removal:
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Remove the needle thread tension.
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Press the two plastic noses 131 together and remove tension dial 132 (fig. 93).
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Remove spring disk 133.
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Turn knurled nut 125 out of guide 134.
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Remove guide 134.
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Remove knurled nut 125 and pressure spring 135.
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Pull out or knock out cemented tension stud 136 complete with pressure piece 137 and the three tensi-
on disks 138, 139 and 140.
Fitting:
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Insert tension stud 136 with the three tension disks and fit pressure piece.
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Cement tension stud into the mounting plate with Onmivit-Rapid.
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Push pressure spring 135 and knurled nut 125 onto tension stud 136.
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Insert guide 134 with its right side and fully screw in knurled nut 125.
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Push on adjustment dial 132 making sure that the guide nose is in contact with the outer surface of the
curve.
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Install the needle thread tension.
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Adjust the needle thread tension according to section 35.