Thread Take-up Lever Hinge Stud
Align the cylinder of the thread take-up lever
with the recess for the hinge stud. Before you
insert the hinge stud, turn the hinge stud and note
the flat machined surface running the length of
the stud. Replace the stud with the machined
surface up. Install the setscrew.
Needlebar Rock Frame Assembly
Hold the needlebar rock frame in the left hand
with the rounded end up and the straight side
facing left. Insert the slide block in the space
provided with the oil hole facing up.
Before you insert the needlebar rock frame
assembly, turn the balance wheel until the
needlebar connecting link is at its lowest position.
Insert the assembly into the face of the machine
so that the connecting stud enters the connecting
link and the slide block is placed over the
projection on the needlebar rock frame rockshaft.
At the same time, the vibrating presser barspring
guide rod with the spring attached must be
positioned into the hole at the top of the face.
Hold the assembly in position.
While you are holding the assembly in position,
insert the hinge stud so that the flat surface is up.
Install and tighten the setscrew.
Install the needlebar rock frame. Position
bracket in position and tighten it in place.
Thread Tension Release Lever Rod
Insert the thread tension release lever rod in
the hole in the back of the machine head so that
the rounded end is facing toward the operator.
Insert the presser bar through the upper
bushing located in the top of the machine head,
about 3 1/2 inches. Place the presser bar position
bar guide lever so that the pinch screw is to the
rear and the arm is to the left. At this time the
lifting-and-releasing unit must be installed. It
consists of a lifting bracket, a releasing bracket,
and a spring that separates the two parts. While
you are holding the unit together, place it into the
face so that the two long levers cover the releasing
rod. Now twist the presser bar down through the
unit. Before you lower the presser bar through
the lower bushing, insert the presser bar spring
bracket with the slot up. Lower the presser bar
through the lower bushing. Turn it so that the
unthreaded end of the hole faces left. Insert the
presser foot in the slot. Replace the screw and
Presser Bar Position Guide
Place the slotted end of the presser bar
position guide through the opening in the top of
the machine head so that it fits over the arm of
the presser bar position guide lever. When you
complete this step, the top of the presser bar
position guide will be flush with the top of the
machine head. Tighten the spline screw in the rear
of the head.
Presser Bar Spring
Tilt the machine down and place the long
curved end of the presser bar spring through the
opening in the back of the machine head and
into the slot in the presser bar spring bracket.
Place the small curved end over the presser bar
spring-support screw. Push it down and under the
presser spring-regulating screw. Tighten the
presser bar spring-support screw. Install the large
NOTE: Preadjust the spring bracket with the
presser foot firmly on the throat plate, and make
sure the foot is straight. Raise the presser bar
spring bracket about one-eighth inch and tighten
the pinch screw.
. At this time, adjust the presser bar guide
lever one-quarter inch up from the bottom of the
guide as in figure 4-7 (K).
. Tighten the pinch screw (figure 4-11 [B]).
Front Presser Bar Connecting Link
Place the large end of the line on the front
presser bar stud.
The bell crank has three attachment points:
(1) the bell crank connection link, (2) the lifting
lever bell crank stud, and (3) the front presser bar
connecting link stud. All three must be engaged
at the same time. Install and tighten the retaining