13
MECHANICAL ADJUSTMENT
CLEARANCE BETWEEN NEEDLE AND SHUTTLE
RACE (ADJUSTMENT METHOD NO. 2)
TO CHECK:
Use this adjustment method NO. 2 if the clearance cannot be adjusted by the method NO.1.
The clearance between the needle and shuttle race should be –0.05 to +0.10 mm.
ADJUSTMENT PROCEDURE:
1. Set the pattern selector dial at " ".
2. Remove the rear cover (see page 6).
3. Loosen the hexagonal socket screw (A) on the lower shaft bushing and slide the gear about 0.5 mm to the right
to create some slack between the gears.
4. Lower the needle and loosen the hexagonal socket screw (B) (2 pcs.).
Move the shuttle race unit axially either forward or backward to adjust the clearance between the needle and
the shuttle race in the range of –0.05 to +0.10 mm.
5. Set the pattern select dial at " ", turn the handwheel to check if the clearance between the needle and inner
edges of the shuttle race spring at the left and right needle drops are equal.
If not, adjust by turning the shuttle race unit.
6. Tighten the hexagonal socket screw (B) (2 pcs.).
7. Loosen the setscrew on the lower shaft bushing and slide the gear back to the original position while adjusting
the backlash.
8. Tighten hexagonal socket screw (A) firmly.
9. Attach the rear cover.
NOTE: The rotary play of the tip of the shuttle driver should be less than 0.3 mm and the
lower shaft should turn smoothly.
After the adjustment, check the hook timing.
–0.05 to +0.10 mm
Clearance should be equal
Hexagonal socket
screw (B) (2 pcs.)
Lower shaft bushing (front)
Needle
Shuttle race spring
Hexagonal socket screw (A)
Summary of Contents for 43
Page 1: ...SERVICE MANUAL PARTS LIST MODEL Magenta 43 First Edition 08 July 2020...
Page 25: ...23 PARTS LIST...
Page 36: ...34 MODEL Magenta 43 PARTS LIST 1 2 3 4 4 6 5 10 8 13 7 4 9 8 14 15 12 11 16 8 8 17 18 19...
Page 40: ...38 MODEL Magenta 43 PARTS LIST 1 2 3 4 5 6 7 8 9 18 11 12 13 14 15 17 16 14 10 8...
Page 42: ...40 MODEL Magenta 43 PARTS LIST 1 2 3 4 5 6 7 8 9 10 11 12...
