Singer 591 - To Remove and Replace Needle Barframe Assembly and Needle Bar; To Remove and Replace Compound Feed Connecting Rod

TO REMOVE AND REPLACE NEEDLE BAR FRAME ASSEMBLY
AND NEEDLE BAR (See Fig. 39)
Remove the two retaining rings A which
secure the needle bar frame connecting link B.
The link can now be removed from the ec
centric stud C and the needle bar frame stud.
From the front of the machine, remove the
pivot securing ring H. Move needle bar to top
of stroke. The frame assembly G should now be
moved toward operator position in order to
move the frame from the stabilizer E. In this
position the total assembly G can be with
drawn from the front of the machine and
needle bar can be removed from frame as
sembly G.
When replacing the frame, the wick and wick
retainer F should be removed from the con
necting link B to prevent damaging the wick
and also to make assembly of connecting link
B easier. When connecting link B is assembled
and the two retaining rings are secured, place
the wick on top of the connecting link ensuring
that it touches both studs; the wick retainer F
should now be positioned. Make sure that the
lower tab engages the lower side of connecting
link B.
RETAINING
RING A
ECCENTRIC
STUD C
•NEEDLE BAR
FRAME CONN.
LINK B
Fig. 39
PINCH SCREW D
NEEDLE
BAR FRAME
STABILIZER E
WICK
RETAINER F
NEEDLE BAR
FRAME
ASSEMBLY G
PIVOT
RETAINING
RING H
TO REMOVE AND REPLACE COMPOUND FEED CONNECTING ROD
Loosen clamping screws B and remove the
two drive pins C.
NOTE: There is no need to remove the re
taining rings D from the drive pins.
The compound feed connecting rod can now
be removed through the bed of the machine.
When replacing the connecting rod A, ensure
that the crank B (see Fig. 34) is correctly
positioned on the feed drive shaft to give the
correct alignment of drive pins C.
CLAMPING SCREW B
CONNECTING ROD
DRIVE PIN C
CONNECTING ROD A
RETAINING RING D
Fig. 40
-25-
RETAINING RING D
CONNECTING ROD
DRIVE PIN C
CLAMPING SCREW B
From the library of: Superior Sewing Machine & Supply LLC