BACKLASH (LOWER SHAFT GEAR)
TO CHECK:
1.
Remove set screw (A) to remove the needle plate (B) and the bobbin holder (C).
2.
Turn the hand wheel slowly toward you until the point of the hook (D) is between both ends
(E) of the feed dog.
3. Rotate the hook race (I) clockwise and counterclockwise by hand and check the play. It
should be within 0.8 mm (K).
*
If there is more than 0.8 mm backlash (between the gears, adjust as follows:
Adjustment procedure
:
1.
Remove the bed cover (See page 4) and loosen hexagon socket screw (F).
2.
Turn the lower shaft bushing (eccentric bushing) (G) in the direction of (H) when the play at
the point of the hook is too small.
3.
Turn the lower shaft bushing (eccentric bushing) (G) in the direction of (I) when the play at
the point of the hook is too large.
4.
Tighten hexagon socket screw (F) securely after adjustment.
5.
Attach the bed cover.
13
