Lewis 17 - Page 20

18
58. Turn hand wheel until the plunger
recedes to its lowest point. Press the knee
lift pad 1383, Plate 16 Page 58, in order to
allow the insertion of a screw driver or other
flat metal object between the plunger and the
presser foot. This is necessary in order to .
hold the plunger down against the plunger
spring. Turn hand wheel away from you one-
half turn, thereby causing the threaded end
of the plunger to pass down through the
plunger barrel.
GROOVE
Figure M
59. Replace equalizing spring 136805, replace nuts 1311 on
the end of the plunger and lock them together. Nuts 1311 should be set
near the lower end of the plunger only sufficiently high to hold them
securely on the stem, as noted an Figure M. If the nuts are set too
high on the plunger, the plunger will not raise sufficiently high to meet
the needle penetration. Nuts 1311 must also be set so that when the
plunger is at its highest point and when plunger adjustment knob LS
219 Figure N, page 19, is turned so that the plunger is at its highest
adjustment, the plun&er should raise the needle about 1/64 of an inch
from the needle guide. Check to see that the needle cannot strike the
side of the plunger. Be very careful to see that the lower nut is
tightened against the upper nut to prevent loosening.
REMOVING PLUNGER & PLUNGER BARREL
Model 17-10
60. Refer to Plate 10, Page 46.
To replace or change_plungers, loosen nut 1160 and remove
bearing screw LS 302, and link 1304. Barrel with plunger will pass
the crank LS 165A by turning the barrel one quarter turn.
REMOVTNG PLUNGER & PLUNGER BARREL
Model 24-12
61. Refer to Plate 11, Page 48.
To replace or change plungers, loosen the two nuts 1160, and.
remove the two screws 1251, and roll LS 207. Turn plunger barrel
4 70-6 one quarter turn and remove from the machine.
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