To Remove Oil Wick Holder; To Install New Oil Wick Holder - Singer 491D Service Manual

TO REMOVE OIL WICK HOLDER (See Fig. 24)
Oil wick holder includes two oil wick
leaders (see Fig. 25) and an oil wick for the
needle bar link and for the two sets of needle
bearings in the thread take-up as shown in
Fig. 24. It is removed in the following
manner:-
1. Remove face plate, needle bar and upper
needle bar bushing from the machine, as
instructed on page 13.
2. Remove upper section of presser bar, as
instructed on page 14.
3. Remove holder screw H3.
4. Pulling gently, draw entire oil wick
holder assembly out of the head of the
machine.
H3
L3
Fig. 25 Correct Installation
1. Remove old oil wick holder as instructed above.
2. Remove top arm plug screw J3, Fig. 25.
3. Insert two oil wick leaders into oil tube K3, as shown in Fig. 25 so that
wick is slack over edge of oil tube K3 at point L3, Fig. 25. This will
insure free passage of oil. Use tweezers through the screw hole at J3 to
loop the wick and bring it into positive contact with the arm shaft
approximately at point M3 shown in Fig. 25.
NOTE: DO NOT FORCE the wick leaders down too tightly against the edge
L3 of oil tube, as shown in Fig. 26, as this will decrease the flow of oil
from the arm shaft to the needle bar link and take-up bearings.
CAUTION: If the bottom of either oil wick leader is caught on the ledge
as shown at N3, Fig. 27, no oil can be taken up by the wick to be carried to
the needle bar link and thread take-up bearing, where it is needed. Make sure
that the oil wick leaders are pushed all the way down into the smaller hole,
without jamming, until they touch the arm shaft, as shown in Fig. 25.

TO INSTALL NEW OIL WICK HOLDER

J3
WICK
PINCHED
K3
L3
M3
Fig. 26 Incorrect Installation
- 17 -
J3
H3
THESE
LOOPS
SHOULD
TOUCH
Y2
B3
WICK NOT REACHING
N3
Fig. 27 Incorrect Installation
THESE
LOOPS
SHOULD
JUST
CLEAR
Fig. 24
OIL
N3