Service manual

S-101
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Revised 09/2004
1-12
NEEDLE BAR AND RACE LINE UP ADJUSTMENTS
Adjustment # 3
Vibration in line
with race
adjustments.
Adjustment # 2
For squareness of race
east and west across bed
plate.
Adjustment # 1
For 180
o
turn of race
It is imperative that the race swing east - west is only 180
o
(# 3). It is
imperative that this 180
o
be square with the center line of the bed
plate (# 2). Also the needle bar assembly must vibrate squarely “east
and west” in harmony with the race (# 3).
To proceed with these adjustments, follow this sequence:
1. Adjust stud n to obtain adjustment # 1.
2. Loosen clamp screw q to obtain adjustment # 2.
3. Recheck adjustment # 1 - if wrong repeat adjustment # 2 and #
1 until they are reconciled.
4. When these adjustments are correctly, adjust the needle bar
assembly “east - west” in harmony with the race by loosening
screws p in sector B (# 3).
When assembling sector mesh
the teeth on sector with race
„north - south“ as in Fig. # 1
and # 4 so that sector teeth will
not disengage gear teeth at
either end of sewing
Adjustment # 4
MACHINE ADJUSTMENTS - CORRECTIVE AND MAINTENANCE