1
CONTENTS
SERVICE ACCESS
FACE COVER ......................................................................................................... 2
BED COVER ........................................................................................................... 3
FRONT COVER ...................................................................................................... 4
REAR COVER ........................................................................................................ 5
MECHANICAL ADJUSTMENT
THREAD TENSION ................................................................................................. 6
PRESSER BAR HEIGHT AND ALIGNMENT ........................................................... 7
DISTRIBUTION OF NEEDLE SWING ...................................................................... 8
NEEDLE DROP ...................................................................................................... 9
NEEDLE BAR HEIGHT ......................................................................................... 10
HOOKTIMING ......................................................................................................... 1]
NEEDLE CLEARANCE TO HOOK ....................................................................... 12
BACKLASH (LOWER SHAFT GEAR) ................................................................... 13
FEED DOG HEIGHT ............................................................................................. 14
STRETCH STITCH BALANCE .............................................................................. 15
BUTTONHOLE STITCH BALANCE ....................................................................... 16
ADJUSTING THE LINE TACK WIDTH AND
DISENGAGEMENT CLEARANCE OF CAM FOLLOWER ............................ 17
WIRING OF TERMINAL BLOCK ............................................................................ 18
Summary of Contents for JEM GOLD 660
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