CONTENTS
TROUBLESHOOTING........................................................................................... 1–3
SERVICE ACCESS
FACE COVER / TOP COVER .............................................................. 4
BELT COVER ....................................................................................... 5
BASE .................................................................................................... 5
FRONT COVER.................................................................................... 6
MECHANICAL ADJUSTMENT
TOP TENSION ..................................................................................... 7
BOBBIN TENSION ............................................................................... 8
PRESSER BAR HEIGHT AND ALIGNMENT ....................................... 9
NEEDLE SWING .................................................................................. 10
NEEDLE DROP .................................................................................... 11
CLEARANCE BETWEEN NEEDLE AND HOOK (NO. 1)..................... 12
CLEARANCE BETWEEN NEEDLE AND HOOK (NO. 2)..................... 13
FEED DOG HEIGHT ............................................................................ 14
NEEDLE BAR HEIGHT ........................................................................ 15
NEEDLE TIMING TO SHUTTLE .......................................................... 16
BUTTONHOLE FEED BALANCE ......................................................... 17
FEED BALANCE ON STRETCH STITCH ............................................ 18
BARTACK FEED OF BUTTONHOLE................................................... 19
DISENGAGEMENT OF CAM FOLLOWER .......................................... 20
NEEDLE SWING IN STRAIGHT STITCH SEWING ............................. 21
BUTTONHOLE LENGTH...................................................................... 22
MOTOR BELT TENSION ..................................................................... 23
WIRING .............................................................................................................. 24