Singer 491D, Service Manual

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To remove the presser bar:-
1. Remove presser foot and face plate.
2. Remove presser bar pressure regulating thumb screw R2, with presser bar
guide from head of the machine.
3. Loosen clamping screw J about one turn (just enough to make it loose).
4. Slide presser bar up through lifting lever link H, Fig. 20 and bushing and
out of machine.
To replace the presser bar:-
1. Slip presser bar down through lifting lever link H, Fig. 20 and lower
presser bar bushing. Make sure that the O-ring is placed between lifting
lever link H and guide bracket G.
2. Replace presser foot.
3. Replace presser bar pressure regulating thumb screw R2 with presser bar
guide.
4. Set the presser bar at the correct height, as instructed on page 4.
5. Tighten screw J.
TO REMOVE AND REPLACE THE PRESSER BAR
To remove the needle thread take-up:-
1. Remove face plate and arm hole plug S2, Fig. 22 from machine.
2. Remove needle bar, upper needle bar bushing, presser bar pressure regulating
thumb screw R2, Fig. 20 page 13, and guide bracket G, Fig. 21.
NEEDLE THREAD TAKE-UP
Fig. 21 Fig. 22
V2
T2
S2
U2 B3
W2
FLAT
E3
C3
G
D3
A3
Y2
X2
Z2
B3