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Singer 29K73 Manual

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TO EXAMINE, REMOVE AND RE-
ASSEMBLE THE PARTS FROM THE
RACK BOX
Remove machine from treadle stand or power bench after
taking out the four screws located at the base of the
machine. The machine should then be tilted back upon its
machine pulley end, the underside facing the adjuster.
Parts can be examined or removed from the rack box after
taking out the two screws V, Fig. 34 and removing the
cover plate. The following parts are then exposed as
shown in Fig. 35: long rack Y, short rack X, intermediate
pinion Z, shuttle driving pinion W, needle plate locating
pin and spring A2, all of which can be removed without
disconnecting the rack box from the machine.
To take out the shuttle carrier, remove the small set screw
in the shuttle driving pinion W by inserting a small
screwdriver through the groove at the side of the rack box
as shown in Fig. 35. The shuttle carrier can then be
pressed through the pinion. To remove the long rock Y,
insert a screwdriver through hole as shown in Fig. 36 and
take out the screw X2. Before proceeding to withdraw the
rack, remove the pinion Z, Fig. 35 then grip the rack and
draw it straight toward the pulley end of the machine. The
short rack X and shuttle driving pinion W can be removed
without difficulty. When replacing anyone or
reassembling the whole of these parts, care must be taken
to see that the gears and racks are correctly engaged, as
shown in Fig. 36.
Fig. 34. Removing Fig. 35. Removing Parts
Cover Plate from Rack Box
INSTRUCTIONS FOR REMOVAL OF THE
RACK BOX
If for any reason it is necessary to remove the rack box
from the machine, proceed as follows: Remove the
machine from its treadle stand or power bench. Turn the
hand wheel until the connecting rod hinge screw, X2, Fig.
36 is opposite the hole in the lower arm. Then tilt the
machine back upon its machine pulley end, the underside
facing the adjuster. Insert a screwdriver through the hole
as shown in Fig. 36, and remove the screw X2. Slightly
loosen the two screws B2 by giving them a half turn with
a screwdriver. Then drive out the taper pin C2, using a
3/16" punch and hammer and take out the two screws B2.
The machine should now be replaced on its feet and the
horn will then come away if pulled in a horizontal
direction.
CAUTION: Never raise the front of the horn or the end of
the long rack may be damaged.
When re-assembling the box to the machine, be sure that
the taper pin C2 is driven in as far as it will go before
finally tightening the two screws B2, Fig. 36.
NOTE: Cover plate is shown removed in Fig. 36 to
illustrate how gears and racks should be correctly
engaged.
Fig. 36. Removing Rack Box
12
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