Backlash (Lower Shaft Gear) - Janome MS5027PR Service Manual

BACKLASH ( LOWER SHAFT GEAR )
TO CHECK:
1. REMOVE THE NEEDLE PLATE AND BOBBIN HOLDER.
2. TURN THE HANDWHEEL SLOWLY TOWARD YOU UNTIL THE TIP OF THE HOOK (A) IS BETWEEN
BOTH ENDS (B) OF THE FEED DOG.
3. ROTATE THE HOOK RACE CLOCKWISE AND COUNTER CLOCKWISE BY HAND, AND CHECK THE
PLAY. IT SHOULD BE WITHIN 0.8 MM (0.03").
* IF THERE IS MORE THAN A 0.8 MM (0.03") BACKLASH BETWEEN THE GEARS, ADJUST AS
FOLLOWS.
ADJUSTMENT PROCEDURE:
1. REMOVE THE BED COVER (SEE PAGE 8), AND LOOSEN HEXAGONAL SOCKET SCREW (C).
2. TURN THE LOWER SHAFT BUSHING (ECCENTRIC BUSHING) (D) IN DIRECTION (E) WHEN THE
PLAY AT THE HOOK TIP IS TOO SMALL.
3. TURN THE LOWER SHAFT BUSHING (ECCENTRIC BUSHING) (D) IN DIRECTION (F) WHEN THE
PLAY AT THE HOOK TIP IS TOO LARGE.
4. TIGHTEN THE HEXAGONAL SOCKET SCREW (C) SECURELY AFTER ADJUSTMENT.
(E)
(F)
(C)
MECHANICAL ADJUSTMENT
(D)
LOWER SHAFT GEAR
(D)
GROOVE OF LOWER SHAFT BUSHING
(F) (E)
25
MS5027PR
(B)
(A)
CHECK THE PLAY