Check the Left-Right Positioning
of the Shuttle Gib Hook
If the shuttle assembly and lower shaft have
slipped left or right of the factory setting, the gib
hook will not be in position to catch the loop.
Fortunately, this is an adjustment that rarely
requires attention.
1.
Re-install the gib hook (p. 48)
2.
Make sure you have a #20 needle
installed.
3.
Remove the presser foot, needle plate and
feed dog.
4.
Looking from the top down in to the
machine (
77
), slowly rotate the Power
Plus Flywheel. As the gib hook swings
past the needle, the hook should be as
close as possible to the right side of the
needle without deflecting it (
A
).
If the gap between the needle and the
hook is too large, the hook must be
moved to the left to close the gap.
If the needle is being deflected by the
hook, then the hook must be moved to
the right.
>
For the sake of clarity (
77
) shows the
machine without the retaining ring
installed. While this makes it easier to see
the timing, the hook must be held in place
with light finger pressure to keep it from
falling out of the shuttle assembly when
rotating the Power Plus Flywheel.
A
Check the Rotational
Positioning of the Shuttle
Race Guide Shaft
Before making any adjustments to the left-
right positioning of the shuttle assembly,
check the rotational positioning of the shuttle
race guide shaft.
1.
Remove the needle plate (p. 67,
17
) and
feed dog (p. 73,
18
).
2.
Remove the bobbin case.
3.
Rotate the Power Plus™ Flywheel until
the needle enters the shuttle (
76
).
If positioned properly, the needle is
centered in the “triangular” opening of
the retaining ring cap spring from front
to back (
A
). If not, you'll need to adjust
the rotational positioning of the shuttle
race guide shaft.
4.
Loosen the compressible timing clamp
screw (p. 66,
78
C
) just a little.
5.
Twist the shuttle race guide shaft carefully
without moving it left or right. If it will not
move, loosen the compressible timing
clamp screw a little more.
6.
Verify that the needle is now positioned
correctly within the retaining ring cap spring.
7.
Tighten the compressible timing clamp screw.
A
76
77
Stitch Master
®
Guidebook: Troubleshooting
64
63
