11
ADJUSTING INSTRUCTIONS
Instructions stating direction or location, such as right, left, front or rear of the machine are given relative to
the operator's position at the machine unless otherwise noted. The handwheel rotates clockwise in
operating direction.
SETTING THE NEEDLE BAR HEIGHT & ALIGNMENT
Insert the first (left) and fourth needles into the needle head. The
needles for this Class of machine are made with two flats on the front
of the shank. This will enable you to correctly position the needles in
the needle head. Make certain the needle shank is fully inserted and
that the screw is seated firmly on the flat.
To position the needle head square with the throat plate, use the
upper knife or a straight edge to align the needles with the cross
grooves in the throat plate. (See Fig. 2)
Refer to table 1 for the dimension from the fourth (lowest) needle to
the surface of the throat plate and for the number of the needle bar
height gauge.
Position the needle bar at its highest point
of travel. Loosen needle bar clamp screw
(A, FIG.3) & use the specified needle bar
height gauge (B) to achieve the desired
height dimension from the fourth (lowest)
needle (C) to the throat plate surface (D).
Tighten clamp screw (A) and recheck set-
ting. Care must be taken not to disturb the
needle head alignment while making the
adjustment. Add the two middle needles
and the retainer.
CAUTION: If the needle head has been replaced it must be torqued to 17 in. lbs.
(20cm/kg). After tightening, check for expansion of the needle bar by position-
ing it up into the lower bushing hole. If the bar has expanded it will bind in the
bushing. The bar must be replaced or lapped to reduce the bell shape. Align
and set needle bar height as described above.
FIG. 2
TABLE 1
FIG. 3
ELYTS
MORFNOISNEMID
)TSEWOL(HT4
OTELDEEN
ETALPTAORHT
ECAFRUS
ELDEEN
RAB
THGIEH
EGUAG
REBMUN
ELDEEN
THGIEH
EGUAG
PET
S
DEKRAM
EGUAG25)MM5.31("23/71UB72212135.
EGUAG06)MM7.21("2/1SD72212005.
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