Position Translator Frame; Remove Movable Base; Remove Movable Base Eccentric Shaft; Adjust Movable Base - IBM 1403 Reference Manual

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1. Remove both eccentric stop studs at the bottom rear
of the translator frame.
2. Loosen both eccentric stop studs at the bottom front
of the translator frame.
3. Remove the clip on the horizontal print alignment
vernier shaft.
4. Unscrew the vernier shaft from the translator frame.
5. Move the horizontal print alignment lever to the
extreme right.
6. Remove the stop blocks at the top front of the trans-
lator frame.
Remove the translator frame.
1. Lift the translator frame just enough to take the full
weight of the frame.
2. Slide the bottom of the frame so that the frame is
clear of the printer casting.
3. Tilt the top of the frame to the rear, and withdraw
the frame from the front of the machine.
Re-install in reverse order.
Perform the following adjustments:
1. Position the translator frame.
2. Position the T-casting front to rear (field).
3. Position the T-casting vertically (field).
Replace the remaining parts in reverse order.
Position Translator Frame (Figure 2)
Check that the six guide rollers rest against their respective
guiding surfaces. Adjust for 0.002" minimum clearance be-
tween the printer casting and both:
1. Upper front guide blocks.
2. Lower rear guide studs.
3. Lower front guide studs.
Check for freedom of movement of the translator frame
along the printer casting.
Remove Movable Base (Figure 5)
Prepare to remove movable base.
1. Remove the ribbon.
2. Remove the type array ( cartridge assembly) .
3. Remove the cover over the terminal block on the rear
of the T-casting.
4. Snap out the plastic oil reservoir under the T-casting.
5. Remove the upper shield over the print control dial.
6. Remove the screws in the front shield of the print
control dial.
7. Remove the screws in the movable base front gibs.
8. Remove the lower ribbon guide.
9. Work enough slack in the read head cable (untape
the cables if necessary) to allow the movable base to be
lifted clear of the T-casting.
Remove the movable base.
1. Carefully lift the base up off the eccentric bearing
blocks.
2. Carefully raise the base so that the print control dial
assembly clears the T-casting lock lever so that read head
cable is not damaged.
Reassemble in reverse order and adjust the movable base
during reassembly.
Remove Movable Base Eccentric Shaft (Figure
5)
Prepare for removal.
1. First, remove the movable base.
2. Remove the forms thickness control lever sector.
Free the movable base eccentric shaft.
1. Support the right end of the eccentric shaft and the
drive-out pin (the small end is up) in the forms thickness
control lever.
2. Remove the forms thickness control lever from the
shaft.
3. Remove the friction clamp from the right end of the
shaft.
NOTE:
The friction clamp provides the necessary
friction to hold the thickness control lever in position
(A to E) without binding. The shaft must move in the fric-
tion clamp for operator setting of the thickness control
lever.
4. Loosen the screws in the collar that holds the right
eccentric bearing block, and slide the collar to the right.
5. Remove the screws under the T-casting that holds
the left and the right bearing blocks to the T-casting.
Remove the eccentric shaft.
1. Lift the left end of the eccentric shaft so that it clears
the T-casting.
2. Withdraw the shaft to the left, carefully sliding the
shaft through the right eccentric bearing block.
CAUTION:
The right eccentric holds the oil line and the wick that
oils the type array.
Replace the movable base eccentric shaft in reverse order
and adjust the movable base during assembly.
Adjust Movable Base (Figure 5)
Remove the ribbon and type array.
Check the adjustment of movable base.
1. The two eccentric shaft support bearings are seated
against the front shoulders of the recess in the T-casting.
2. A wink of 0.002" exists between the motor drive gear
and the type idler gear
at the point of tightest engagement.
3. The movable base sets on the T-casting with a maxi-
mum vertical clearance of 0.001".
4. The movable base slides freely in the horizontal plane.
If the conditions just stated are met, no further adjust-
ment is necessary. Replace the remaining parts in reverse
order.
Further prepare to adjust the movable base.
1. Remove the cover over the terminal block on the rear
of the T-casting.
2. Snap out the plastic oil reservoir under the T-casting.
Adjust the clearance of the eccentric shaft support bear-
ings to the front shoulders of the recesses in the T-casting.
1. Set the print impression control lever to E.
2. Loosen the mounting screws (under the T-casting)
for the eccentric shaft support bearing.
3. Position the bearing against the front recess in the
T-casting with a maximum clearance of 0.001".
4. Tighten the mounting screws.
Adjust the movable base to the T-casting for a maximum
clearance of 0.001".
1. Tighten the two front gibs that hold the movable
plate to the T-casting ( screws under T-casting) .
2. Loosen the screws in the lower ribbon guide bar (two
ears hold the movable base against the T-casting) .
3. Press down hard on the movable base.
4. Press the ears of the lower ribbon guide bar against
movable base.
5. Tighten the screws in the lower ribbon guide bar
while maintaining pressure as stated in steps 3 and 4.
Adjust the clearance of the motor drive gear to the type
idler gear. ( Type array was previously removed.)
1. Loosen the adjusting block screw. (The block is under
the movable base, and fits over the stud in the T-casting.
It positions the movable base right to left.)
2. Turn the idler gear to obtain the tightest mesh with
the motor drive gear.
3. Slide the movable base left to right to obtain a wink
between the idler gear and the motor drive gear of 0.002"
at the point of tightest engagement.
4. Tighten the adjusting block screw and recheck clear-
ance. Wink must be present with no stress on motor shaft.
Replace the remaining parts in reverse order.
Remove T
-
Casting (Figure
5)
Prepare for removal.
1. Remove the ribbon.
2. Remove the ribbon drive unit.
3. Remove the type array (cartridge assembly)
4. Remove the wires to the T-casting.
5. Remove the front cover.
6. Remove the right cover.
7. Remove the inner front cover.
Remove the movable base (or remove the read head).
Free the hinge pin.
1. Open the T-casting.
2. Remove the ribbon guide and print line indicator
from the hinge.
3. From the rear side of the T-casting, drive pins from
a. upper eccentric bearing.
b. lower eccentric bearing.
4. Loosen the collars on the hinge pin.
5. Remove the screw that is screwed into the hinge pin
through the horizontal hole in the upper arm of the T-cast-
ing.
6. Carefully close and lock the T-casting.
7. Loosen the set screw in the upper hinge pin bushing.
8. Loosen the set screw that locks lower eccentric bear-
ing.
Remove the T-casting.
1. Remove the hinge pin and catch parts as they are
freed by hinge pin.
2. Unlock the T-casting while supporting the weight of
the casting.
3. Slide the T-casting out toward the front to clear the
translator frame.
Replace T
-
Casting (Figure
5)
Prepare to reinstall the T-casting.
1. Insure that the hinge pin will slide through all parts.
2. Slide the hinge pin through the upper bearing hole
in the T-casting.
3. Thread the upper eccentric bearing on the hinge pin.
4. Thread the lower eccentric bearing on the hinge pin.
5. Slide the hinge pin into the lower bearing hole in the
T-casting.
Locate the eccentric bearings in the T-casting to enable,
in a later step after the T-casting has been installed, the
pinning of bearings to the hinge pin.
1. Locate the lower eccentric bearing rotationally.
a. Rotate the bearing around the hinge pin so that
high side of the eccentric is to the right.
b. Further rotate the bearing so that the high side of
the eccentric rotates 45° toward the rear.
c. Work the eccentric into the lower bearing hole.
d. Insert the taper pin (finger tight) into the bearing
and the hinge pin.
2. Locate upper eccentric bearing rotationally.
a. Rotate the upper bearing around the hinge pin
until it lines up with the upper bearing hole.
b. Work the bearing into the upper hole.
c. Insert the taper pin (finger tight) into the bearing
and the hinge pin.
3. Position the bearings vertically.
a. Slide the hinge pin and bearings vertically until the
horizontal screw hole in the hinge pin is at the same
level as the center of the horizontal hole in the upper
arm of the T-casting.
b. Insert the set screw and lock the lower eccentric
bearing to the lower arm of the T-casting.
c. Remove the taper pins.
d. Withdraw the hinge pin.
Prepare the translator frame for the. T-casting replace-
ment.
1. Place the bushing in the upper arm of the translator
frame and lock the bushing as high as possible in the arm.
2. Place thrust washer over the jackscrew in the lower
arm of the translator frame, align the hole centers, and
scotch-tape the washer to the jackscrew.
Set the T-casting into position.
1. Gather all loose parts that fasten to the hinge pin
( including the hinge pin) and set them on the printer so
that they will be close at hand when needed.
2. Lift the T-casting into position on the translator frame,
keeping the right end high so that the thrust washer is not
dislodged.
3. Actuate the T-casting lock lever until the latch just
engages the latch catch.
Install the hinge pin.
1. Slide the hinge pin through the bushing in the upper
arm of the translator frame.
2. Slide the hinge pin through the upper eccentric bear-
ing in the upper arm of the T-casting.
3. Thread the hinge pin through the loose parts in cor-
rect order and in correct relation to the T-casting.
4. Slide the hinge pin into the lower eccentric bearing.
5. Slide the hinge pin through the thrust washer into
the jackscrew.
Fasten the eccentric bearings to the hinge pin.
1. Align the lower pin hole in the hinge pin to the pin
hole in the lower bearing.
2. Insert the taper pin into the holes just aligned.
3. Align the pin hole in the upper eccentric bearing to
the upper pin hole in the hinge pin.
4. Insert the taper pin into the holes just aligned.
5. Drive in both taper pins.
Position the hinge pin.
1. Turn the hinge pin until the high side of the eccentrics
are to the right.
2. Insert the screw through the hole in the upper arm
of the T-casting, and screw through the hinge pin.
3. Free the bushing in the upper arm of the translator
frame, and force the bushing against the T-casting.
Perform these adjustments:
1. Position the T-casting front to rear (field) .
2. Position the T-casting vertically ( field) .
3. Adjust the ribbon shield assembly.
Replace remaining parts in reverse order.
Position T
-
Casting (Factory)
Position the T-casting vertically (factory specification and
adjustment) .
1. The lower T-casting bushing to be located vertically
to provide 0.570" ± 0.005" between the lower surface of
REMOVALS AND ADJUSTMENTS
15
14

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