To Adjust The Timing Of The Needle And The Lower Looper - Kenmore 16677 - Serger Sewing Machine Servicing Manual

TO ADJUST THE TIMING OF THE NEEDLE
AND THE LOWER LOOPER
CORRECT SETTING:
WHEN THE NEEDLE COMES UP 2.8 TO 3.2 MM FROM ITS LOWEST POSITION, THE TIP OF THE
LOWER LOOPER COMES JUST LEFT OFTHE NEEDLE (#11) ON THE RIGHT.
TO ADJUST:
1. REMOVE THE PRESSER FOOT, NEEDLE PLATE AND LEFT-SIDE NEEDLE.
2. REPLACE RIGHT-SIDE NEEDLE WITH A #11 ONE.
3. TURN THE HANDWHEEL TOWARD YOU TO GET THE LOWEST NEEDLE POSITION.
4. SET THE TWO GUAGES (787-G02, 787-G03), AS SHOWN IN (FIG. 1) AND TIGHTEN BOLT (B).
# THIS TIME, THERE SHOULD BE NO CLEARANCE BETWEEN THE GAUGES AND THE NEEDLE
BAR LOWER BUSHING.
5. REMOVE PLATE GAUGE (787 - GO3).THEN TURN THE HANDWHEEL TOWARD YOU UNTIL THE
GAUGE TOUCHES THE NEEDLE BAR LOWER BUSHING, AS SHOWN IN (FIG. 2).
6. IN THIS CONDITION, LOOSEN THE HEXAGONAL BOLT (C) JUST ENOUGH TO MOVE THE LOWER
LOOPER BASE.
ADJUSTTHE LOWER LOOPER POSITION IN ORDER TO MEETTHE TIP OF LOWER LOOPER
WITH LEFT-SIDE OF NEEDLE (#11), AS SHOWN IN (FIG. 3) AND (FIG. 4).
TIGHTEN HEXAGONAL BOLT (C).
7. REMOVE THE GAUGE (787 - GO2).
# CHECK THE CLEARANCE BETWEEN THE NEEDLE AND LOWER LOOPER.
# CHECKTHE CLEARANCE BETWEEN THE LOOPERS.
8. REPLACE THE RIGHT SIDE NEEDLE WITH A#14 ONE.
9. ATTACH THE LEFT SIDE NEEDLE, NEEDLE PLATE AND PRESSER FOOT.
# BE CAREFUL NOT TO TIGHTEN BOLT (B) TOO MUCH.
_ NEEDLE BAR LOWER BUSHING
IaO CLEARANCE !!1 __
_ ' "NEEDLE GAUGE RA/S
PLATE GAUGE (787-G03) (787-G02) NEEDLE
(THICKNESS: 3 MM BAR
COLOR: BLACK) (FIG, 1) (Fig. 2)
LOWER LOOPER
LOWER LOOPER
HEXAGONAL BOLT !
_ RIGHT NEEDLE (#11) H _._ RIGHT NEEDLE (#11)
""_-0_ 3
LOWER L MM
(FIG. 4)
(FIG. 3)
2O