IBM Selectric I/O Reference Manual page 27

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4.
Slowly hand cycle the machine until the check
pawl just drops into a tooth on the check rat-
chet. The print shaft gear should have rotated
1/2 to one tooth. If the print shaft gear rotat-
ed further than one tooth the collar must be
moved top toward the rear. Less than 1/2 to
one tooth, move it top toward the front.
A zero ti It, negative-f ive rotate character is used
because it offers the greatest resistance to the cycle
shaft during the restoring portion of a cycle, caus-
ing the cycle clutch spring to slip at the earliest
possible time.
NOTE:
If the collar shou Id become completely
loose, a good starting point may be ohained by
positi oning the collar so that its adjusting screw head
is approximately in line with the high point of the
negative-five cam.
CAUTION:
The cycle clutch stop attached to the
collar may prevent the shaft from reaching the
latched position. Any change in the cycle clutch
collar adjustment wi II necessitate a readjustment of
the
stoPi
the refore it is usually best to loosen the
stop before attempting to adjust the collar.
B
Degree Wheel Method
With the machine at zero degrees (cycle clutch
latched at rest) select a -5 rotate,
a
ti It character
and hand cycle the machine slowly.
The cycle
clutch spring should slip and stop driving at 170 to
175 degrees.
Cyel e Shaft Must Be Detented
When Setting The .007" To
.015" Overthrow
.007
11
To .015
11
Pulley
FIGURE 44.
Cycle Clutch Overthrow Stop - Late
2-12
5.
Cycle Clutch Overthrow Stop - With the cycle clutch
latched and the cycle shaft backed up against the check
pawl in its rest position, advance or retard the overthrow
stop on the cycle clutch collar so that it will allow the
cye Ie shaft to overthrow its latched positi on by .007
11
to
.015" (Fig. 44-late or Fig. 45-early).
FIGURE 45.
Cycle Clutch Overthrow Stop - Early
CAUTION:
After adjusting the cycle clutch overthrow
stop check the cycle clutch sleeve end playas the over-
throw stop may bind against the sleeve.
6.
Filter Shaft - The filter shaft is set during manufacture at
approximately 25° (Fig. 46). This adjustment is not crit-
ical. When the relalionship (If the filter shaft gear has
been changed set the filter shaft for proper escapement
cam timing. Be sure and check the shift interlock cam
adjustment also.
NOTE:
Be sure to maintain .002" to .004" end playof
the filter shaft within the left hand filter shaft bearing.
The mounting of the left hand fi Iter shaft bearing allows
.011" laterial play of the bearing. Do not confuse this
lateral play of the bearing with the filter shaft end play.
Front of Machine .... - - - - -
FIGURE 46.
Filter Shaft
CARRIER AND ROCKER
Fine Alignment
1.
Ii
It Tube End Play - (machines prior to gearless ti It).
The tilt pulley should be adjusted up or down on the ti It
tube so that .002" to .004" end play exists in the tilt
tube (Fig. 47).
The ti It pu Iley is attached to the ti It tube by a set screw
and key against a flat surface on the ti It tube. The set
screw is accessible through a hole in the left side of the
carrier. Move the carrier to the right and remov:: the
ti It pulley spring and ti It detent spring. The tilt detent
spring stud can then be removed through the hole in the

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