BERNINA International AG Seestrasse 161 CH-8266 Steckborn Schweiz Seite 60 von 172
DRAFT – VERSION
• Picture 7 - Now turn the hand wheel in direction of
rotation until the mark on the white plastic belt
wheel stands in front of the frame lug mark.
• Picture 8 - Refit and adjust belt tensioner.
Check:
• Picture 8 – The mark on the white plastic belt
wheel must be exactly flush with the freearm
frame lug mark.
• Picture 8 – Rehook tension spring between clutch
carriage and belt tensioner.
• Refit and adjust thread-cutter unit (see 4.3.4
).
• Picture 1 – Refit spring A.
• Insert hook and close hook race cover.
• Insert bobbin case.
• Test run the machine. If it runs smoothly and
quietly, all the fitting and adjusting work has been
carried out properly.
Note:
• Picture 9 - If the hook makes noise, untighten the
2 hook bearing screws a by an eighth rotation.
• With the motor running at slow speed, use
eccentric key 001361.70.00 to find the position in
which the machine runs quietest.
• Slightly retighten the two hook bearing screws 1 =>
2. Then retighten fully 1 => 2.
Note regarding servicing:
• Use a polishing disk to remove cinch marks on the
hook body or slight damages to the hook tips.
Replace hook if it is badly scratched or has broken
hook tips.
• For lubrication of hook refer to lubrication diagram
(see 7
).
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