Clearance Betweenneedleand Hook - Kenmore 385.190011890 Service Manual

SEWING MACHINE DIV. 20 MODEL 385.19001890
MECHANICAL ADJUSTMENT
CLEARANCE BETWEENNEEDLEAND HOOK
*THE CLEARANCE BETWEEN THE NEEDLE AND THE POINT OF HOOK SHOULD BE -0.1 TO
+0.05 MM.
PREPARATION:
1. REMOVE THE NEEDLE PLATE, BOBBIN HOLDER, BASE COVER, BASE LID AND BED COVER
UNIT (SEE P.22), AND REPLACE THE NEEDLE WITH THE TESTPIN (D) #68368.
2. TURN THE POWER SWITCH ON, AND SELECT PATTERNNO. 5 (ZIGZAG STITCH).
ADJUSTMENT PROCEDURE:
1. LOOSEN THE SCREWS (A),(B),(C), THEN SLIGHTLYTIGHTEN THE HINGE SCREW(C).
2. TURN THE HANDWHEEL TOWARD YOU, AND ADJUST THE CLEARANCE BETWEENTHE MAS-
TER NEEDLE AND THE POINT OF THE HOOK IN THE LEFTAND RIGHT NEEDLE POSITION TO
-0.1 TO +0.05mm BY MOVING THE HOOK SETPLATE(E) UP OR DOWN.
3. TIGHTEN THE SCREWS(A),(B),(C).
4, CHECK THE BACKLASH OF THE HOOK DRIVE, GEAR AND LOWER SHAFT GEAR. IF THE
BACKLASH IS TOO GREAT OR NOT ENOUGH, ADJUST THE BACKLASH IN ACCORDANCE
WITH 'TO ADJUST THE BACKLASH OF HOOK DRIVE GEAR AND LOWER SHAFT GEAR"
(SEE P.31),
5. ATTACH THE BED COVER UNIT, BASE COVER, BASE LID, NEEDLE PLATE AND BOBBIN
HOLDER, AND REMOVE THE TESTPIN (D).
SCREW (C)
TESTPIN (D)_
_
#68368 S
POINT OF HOOK
+0.05 to 43.I mm
HOOK SETPLATE (E)
3O