Bernina B 570 - Main Motor

BERNINA International AG Seestrasse 161 CH-8266 Steckborn Schweiz Seite 81 von 172
DRAFT – VERSION
4.3.19 Main motor
See ESD-related note
Disassembly:
• Remove the covers (see 4.1
).
• Remove wheel.
• Remove screws a (T20 M4x12, u-washer 5.3x10x1,
serrated washer 5.1x9x0.5).
• Remove drive belt.
• Picture 1 - Disconnect plugs 1 and 2.
• Picture 2 - Remove screws a (T20 M4x12, u-washer
5.3x10x1, serrated washer 5.1x9x0.5).
• Slide main motor out of motor bracket.
Assembly:
• Position motor back into motor bracket.
• Picture 2 - Slightly retighten screw a including u-
washer and serrated washer.
• Picture 1 - Reconnect plugs 1 (red positive pole '+')
and 2 (black negative pole '-').
Note: The positive pole can be identified by the salient
3.
• Refit drive belt and wheel.
• Adjust belt tension (see 5.1.2
).