Singer class 251 - Arm Shaft Removal

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
44
8. Place index finger under wick
and holder body and simultane-
ously pull the oil-removing
wick, as required, sliding the
hinge plate and cover L4 fully
into its recess in the head of the
machine, as shown in Fig. 63.
9. Securely tighten the four screws
K4, Fig. 62.
l 0. Check the entire assembly to
make certain that the holder
body 04, Fig. 61 hinges freely
under the needle bar crank.
11.
SLIDE
INTO
RECESS
~l
/
L4
/
FINGER
UNDER
WICK
Fig. 63. Adjusting
Wick in Machine
Replace END of wick behind
tension releasing lever 04 and
into oil pool behind lower
needle bar bushing, as shown
in Fig. 64.
12. Replace LOOP behind and un-
der tension releasing lever 04
and then out over lower
pre~•~r bar bushing, as shown
in Fig. 64.
Fig. 64. Location
of Loop and End of
Wick in Head of Machine
13. Replace presser bar and lifter
assembly, part for part, in the
reverse order of their removal
as instructed in Steps 2 to 9
on page 41.
14. Replace face plate, as in-
structed on page 19.
..
45
TO REMOVE THE ARM SHAFT
The horizontal arm shaft should be removed from the arm of the
machine in the following manner:-
l.
2.
3.
4.
5.
6.
7.
8.
Remove the arm side shield and wick, as instructed on page 39.
Remove the thread take-up oil guard, as instructed on page 39.
Remove the needle bar, upper needle bar bushing, presser foot
and presser bar, as instructed on page 35.
Remove entire thread take-up lever assembly, as instructed on
page 36.
Remove the oil-removing wick, as instructed on pages 41 and 42.
Set the machine at any stitch length except the longest or the
shortest (see instructions on page 17) to prevent binding of the
arm shaft during removal and replacement.
Loosen the four screws in the arm top cover and remove the arm
top cover.
Remove the oil lead that is fastened to the casting just beneath
the arm top cover.
~
R4
T4
Fig. 65. Loosening the Feed Eccentric
9. Remove the feed timing screw Y, Fig. 65 and loosen the set screw
0, Fig. 65, in the feed-lifting-eccentric-and-bevel-gear, X3, Fig. 65.
l 0. Remove the timing screw Z and loosen set screws in the feed
eccentric U4, Fig. 65.
11. Remove arm shaft screw R4, Fig. 65 from machine pulley end of
arm shaft.
12. Loosen the two set screws 14, Fig. 65 and remove the machine
pulley.
13. Turn the needle bar crank until it is in the position shown at M4,
Fig. 66, to prevent crank from disturbing the three wick loops in
holder W4, Fig. 66, during removal of arm shaft.