Upper Feed Crank - Bernina B 590 Service And Maintenance Manual

Assembly:
• Picture 1 – Position feed-dog carrier B. Slide eccentric shaft C back into respective seats up to stop,
including the black adjusting collar.
• Picture 1 – Hold eccentric shaft at stop, position black adjusting collar against it. Then slightly
retighten screw m.
• Picture 1 – Rehook tension spring A.
• Picture 1 – After adjusting eccentric shaft (see 5.6.1), retighten two setscrews k.
• Refit covers (if appropriate).

4.3.9 Upper feed crank

Disassembly:
• Picture 1 – Remove winder unit.
• Remove the covers (see 4.1)
• Picture 2 – Remove tension spring A and shoe G.
• Picture 3 – Remove screws b T20 (M4x10)
including clamps.
• Picture 4 – Untighten setscrews k T6 (M3x6) of
crankshaft clamp.
• Picture 3 – Slide crankshaft out in direction of
arrow.
Assembly:
• Picture 3 – Refit crankshaft into crankshaft clamp
against direction of arrow.
• Picture 4 – Slightly retighten setscrew k of
crankshaft clamp.
• Picture 3 – Refit screws b including clamps.
• Picture 2 – Refit shoe G and tension spring A.
• Adjustment
(see 5.6.6).
• Picture 1 – Refit winder unit and adjust it
(see 5.13).
BERNINA International AG Seestrasse 161 CH-8266 Steckborn
DRAFT – VERSION
Schweiz Seite 70 von 172