47 |
Sailrite�com
Leatherwork
®
Guidebook
| 48
53
Check the Rotational Positioning
of the Shuttle Race Guide Shaft
1� Remove the needle plate (p� 49,
17
)
and feed dog (p� 55,
18
)�
2� Remove the bobbin case and bobbin�
3� Rotate the balance wheel until the needle
enters the shuttle (
53
)�
If positioned properly, the needle is
centered in the “triangular” opening of the
Retaining Ring Cap Spring from front to
back (
A
)�
4� Minor adjustments can be made by loosening
the two screws (
B
) to slide the cap spring
forward or back�
If more movement is required, you’ll
need to adjust the rotational positioning
of the Shuttle Race Guide Shaft (p� 48)�
A
A
B
54
D
E
C
Adjust the Rotational Positioning of the Shuttle Race Guide Shaft
1� First, determine that there is no more than
1/64 inch of play in the left-right movement of
the lower shaft (
C
)� If there is more than 1/64
inch play, refer to p� 43�
2� Rotate the balance wheel until the needle
enters the shuttle (
53
)�
3� With left hand, grab the Shuttle Race Guide
Shaft (
D
); hold to the right and maintain
light pressure�
4� With right hand, loosen the clamp screw (
E
)
slightly� Adjust the Shuttle Race Guide Shaft
(
D
) so that the needle is positioned correctly
within the Retaining Ring Cap Spring (
53
,
A
)�
5� Once you've confirmed correct positioning,
tighten the compressible timing clamp
screw (
E
)� Be careful while doing this to
keep clamp (
F
) tight up against the casting
leg (
G
)�
Confirm that there is very little play in the
left-right movement of the lower shaft (
C
)�
F
G
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