Needle And The Lower Looper Timing - Janome 634D Servicing Manual

TO ADJUST THE NEEDLE AND THE LOWER LOOPER TIMING
When the needle comes up 1.4 to 1.8 mm (A) from its lowest position, the tip of lower looper (B)
comes just to left side of left needle (C) on the left.
To adjust:
1. Remove the presser foot and the needle plate.
2. Turn the balance wheel toward you with your hand to bring the needle (C) 1.4 to 1 .8 mm from
its lowest position. Loosen the hexagon bolt (D) just enough to move the lower looper driving
arm (E), and move it until the tip of lower looper (B) comes just to left side of needle on the left
(C).
3. Tighten the hexagon bolt (D). Check if timing of the needle and lower looper is correct. Check
the clearance between the needle and lower looper needle guards.
4. Attach the presser foot and the needle plate.
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