Backlash (Lower Shaft Gear) - Kenmore 385. 18630890 Service Manual

SEWING MACHINE D IV20 MODEL 3 85,18630890
MECHANICAL ADJUSTMENT
BACKLASH ( LOWER SHAFT GEAR )
TO CHECK:
1. REMOVE THE NEEDLE PLATE AND BOBBIN HOLDER,
2, TURN THE HAND WHEEL SLOWLY TOWARD YOU UNTIL THE TIP OF THE SHUTTLE
HOOK (A) IS BETWEEN BOTH ENDS (B) OF THE FEED DOG
3, ROTATE THE HOOK RACE CLOCKWISE AND COINTER CLOCKWISE BY HAND AND
CHECK THE PLAY. IT SHOULD BE WITHIN 0.8 MM (0,03"),
" IF THEREIS MORE THAN 0.8 MM (0,03 °) BACKLASH BETWEENTHE GEARS, ADJUST AS
FOLLOWS.
ADJUSTMENT PROCEDURE:
1_ REMOVE THE BED COVER (,SEEP,7) AND LOOSEN HEXAGONAL SOCKET' SCREW (C).
2, TURN THE LOWER SHAFT BUSHING (ECCENTRIC BUSHING) (D) IN DIRECTION (E)
WHEN THE PLAY AT THE SHUTTLE HOOK TIP IS TOO SMALL
3. TURN THE LOWER SHAFT BUSHING (ECCENTRIC BUSHING) (,D) tN DIRECTION ( F )
WHEN THE PLAY AT THE SHUTTLE HOOK TIP IS TOO LARGE
4. TIGHTEN HEXAGONAL SOCKET SCREW ( C ) SECURELYAFTER ADJUSTMENT.
(A)cHECk THE PLAY
• (D)
LOWER SHAFT GEAR _ GROOVE OF LOWER SHAFT BUSHING
(F) (E)
27