BACKLASH OF HOOK DRIVE GEAR AND LOWER SHAFT GEAR
The backlash of the gears should be smooth and should be less than 0.8 mm when the point
of the hook is under the feed dog.
Turn the power switch off.
Remove the needle plate and bobbin holder.
Turn the handwheel slowly toward you until the tip of the shuttle hook A is between both
ends B of feed dog.
Rotate the hook race clockwise and counter clockwise by finger. Check the play. It should
be within 0.8 mm.
If there is more than 0.8 mm, adjust as follows:
Remove the bed cover and loosen the screw C.
Turn the lower shaft bushing D eccentric, in the direction E when the play at shuttle hook
tip is too small.
Turn the lower shaft bushing D eccentric, in the direction F when the play at shuttle hook
tip is too large.
Tighten the screw C securely after adjustment.