Bernina 7 Series Manual page 165

Lubricating
⦁ turn power switch to «0» (off)
⦁
remove plug from electrical outlet
⦁ remove the stitch plate
⦁ refill the oil depot using BERNINA-oil
⦁
replace the stitch plate
⦁ remove bobbin case
⦁
press release bracket to the left
⦁
flap down the fastening bracket along with the black hook race cover
⦁ remove the hook
⦁
fill as much BERNINA-oil into both oil depots so that the felts are damp
⦁ insert the hook
⦁
close hook race cover and fastening bracket, release bracket must engage
⦁
as a check, turn the handwheel
⦁ insert the bobbin case
⦁
close the bobbin cover
ATTENTION!
To provide a good sewing quality, the surface of the hook
sleeve (marked in red) MUST remain free of oil.
Otherwise clean with a cloth.
Cleaning Cleaning
165