While you wait for answers, we may have found some information which could help you.
Click here for Middle Button HelpBrother 840 punchcard gate peg problem?
the middle button on my brother 891 carriage will not stay in?
how to fix brother 965 ?
Brother kh900?
KH 260 Brother Knitting machine?
Garter Carriage will not do knit stitch only yarn over needles selected for?