SINGER 331K4 - Manual (Page 16)

16
TO CENTRALIZE FEED DOG IN THROAT
PLATE SLOTS
CHECK:
Feed dog should not contact edges of throat plate
slots.
SIDEWISE SETTING:
Feed dog should travel on a line midway between
sides of throat plate slots.
Feed dog can be moved toward left or right, as
required, after loosening two nuts S and screw U, Fig.
36, on screw centres T.
To move feed dog toward left, loosen screw centre
T at left end of shaft V, as required, and tighten the
other screw centre an equal amount.
Make certain that screw centres hold feed rock shaft
V snugly in place without binding. Then securely tighten
both nuts S and screw U.
Fig. 36. Centralizing Feed Dog LENGTHWISE SETTING:
Set machine for longest stitch as instructed on page
10 .
Feed dog should be set so that its movement is
equidistant from front and rear edges of throat plate
slots.
Loosen clamping screw U and move feed bar R and
rock shaft V, as required.
Securely tighten screw U.
TO REMOVE AND REPLACE THE
SHUTTLE RACE
REMOVAL (With needle at highest position):
Remove the two screws W, Fig. 37.
Remove the shuttle race X, Fig. 37, from machine.
Shuttle Y may now be slipped in or out of shuttle race
X without difficulty.
REPLACEMENT (With needle at highest position):
Slip shuttle Y into shuttle race X, Fig. 37. Turn shuttle
in shuttle race so that shuttle will correctly engage
shuttle driver Z, Fig. 37.
Install shuttle race with shuttle in machine.
Fasten with two screws W, Fig. 37.
Tighten two screws W.