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SETTING THE FEED DOGS FOR DIFFERENTIAL FEED (CONT.)
If adjustment is necessary loosen screw (E, Fig. 11A) in feed dog
support (C) and move as required.
differential feed dog (A) may then be leveled with main feed dog
(B). If adjustment is necessary loosen screw (F) and move feed
dog up or down as required. Retighten screw (F).
NOTE:
Should the main feed dog require repositioning due to
contact with the throat plate in its forward or rearward
travel, loosen set screw (C, Fig. 10A) in main feed bar
driving link (D), rotate main feed bar eccentric driving
stud (E) as required. Driving stud (E) has a thin hexagon
head with cutouts on two of the flats allowing move-
ment by tapping with a sharp pointed tool, when wrench
21388AZ is not available. Whenever the main feed bar
eccentric driving stud position has been changed, re-
check rear needle guard setting, adjustment may be
required. Retighten set screw (C). Position main feed
dog support (C, Fig. 11A) flush against bottom of main
feed dog (B), tighten support screw (E) securely.
CHANGING STITCH LENGTH
When change in stitch length is required, remove large plug screw
(A, Fig. 12). Loosen feed rocker driving link screw (B) in lever (C).
Moving the feed rocker driving link up in the lever slot lengthens
the stitch, moving it down, shortens the stitch. Retighten link screw
(B) securely and replace plug screw (A).
NOTE:
If plug screw (A) is replaced with a new plug screw, it
should be sealed with a silicone seal.
Any stitch length change, requires resetting the needle
guard.
CAUTION: When making stitch length adjustment do not exceed
maximum recommended stitch length due to possible
part damage.
SETTING REAR NEEDLE GUARD
Set the rear needle guard (A, Fig. 13) horizontally to touch and
possibly deflect slightly to obtain solid guarding of all needles
(B) when at its extreme forward position. If adjustment is neces-
sary loosen screw (E) and move guard front to back as required.
It should be set vertically as low as possible, yet have its guard-
ing surface in contact with the needles until the points of the
loopers (C), moving to the right, are even with the right side of
the needles. If adjustment is necessary loosen screw (F) and
move guard and holder up or down as required.
CAUTION:
If stitch length is changed, needle guard must be
reset.
NOTE:
When installing the needle it should be parallel with the
eye in line of feed. If adjustment is necessary, loosen
screw (N, Fig. 15) in needle head and rotate needle to
attain adjustment (D, Fig. 13).
NOTE:
Looper closeness to needles as described on page 11
must be maintained after rear needle guard is ad-
justed. Readjust loopers as necessary.
Retighten screw (E).
The
13
C
A
B
FIG. 11
C
A
B
D
FIG. 11A
C
FIG. 12
FIG. 13
Plain Feed
E
F
Differential Feed
B
A
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