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SETTING THE PRESSER FOOT (CONT.)
FIG. 24
FIG. 26
FIG. 27
FIG. 25
To adjust the position and tension of frame chip guard (A, Fig. 26),
slightly loosen screw (B) and turn washer (C) with 21388Y spanner
wrench until spring (D) snaps the guard into the closed position.
Tighten screw (B). A light resistance should be felt when opening the
guard.
SETTING THE KNIFE DRIVE LEVER
17
The presser foot lifter stop
plunger must be set so the
cover thread hook will not hit
the bottom of the needle
head as the presser foot is
being lifted.
Position the
needle bar to its lowest point
of travel. Loosen nut (A, Fig.
2 4 ) a n d t u r n p l u n g e r ( B )
clockwise until it strikes the
crankshaft counterweight.
While applying pressure to
lifter (C) to lift the foot, back
out of the plunger until the
distance between the hook
and the underside of the
needle head is 1/64" (0.4mm)
(see Fig. 25). Tighten nut (A,
Fig. 24).
Position the needle bar at the bot-
tom of its stroke. Measure from the
top of the needle bar to the top of
the casting to obtain dimension "A"
(see Fig. 27).
Position the needle bar at the top
of its stroke. Measure from the top
of the needle bar to the top of the
casting to obtain dimension "B".
Subtract dimension "A" from di-
mension "B" and divide by two. Add
this number to dimension "A" to
obtain "C". Set a caliper to the "C"
dimension and turn the handwheel
in operating direction until the
height of the needle bar is at the
"C" dimension
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