Brother International CB3-B917 Service Manual - Page 26

3. ASSEMBLY AND ADJUSTMENT 12. Remove the loop spreader guide . and the loop spreader 322s 13. Place the set screw collar onto the looper setting shaft so that the set screw is aligned with the hole, push the looper onto the looper setting shaft as far as it will go, and then provisionally tighten the set screw . 323s C (TQx1) D (TQx7) 324s 325s < Adjustment of the needle and looper > (1) Raise the needle bar from the lowest position and align the second reference line C from the top of the needle bar with the bottom of the needle bar metal. (For a TQx7 needle, use the bottom reference line D.) (2) Turn the looper setting shaft to adjust so that the looper end is aligned with the needle center. Then gently contact the looper setting shaft to the loop spreader groove cam and tighten. 326-1s 0.03 - 0.08 mm < Adjusting the clearance between the needle and the looper > (1) Move the looper back and forth to adjust so that the clearance between the looper and the needle is 0.03 - 0.08 mm when the end of the looper is aligned with the needle center. 326s CB3-B916A/B917A 20