Base Adjustments And Removals - IBM 1403 Field Engineering Maintenance Manual

ing the springs. (Too much tension will tear the
paper.) Be sure the slotted end of the spring is
looped down from the top and placed directly un-
der the curved nut.
2. The bevel gears on the countershaft assembly, and
the friction drive-shaft assembly are to be posi-
tioned for .002" to .004" wink and alignment of the
crown points of each gear (full-tooth engagement).
Note: Late machines do not have bevel gears.
3. If the teeth do not engage correctly, both shafts
will have to be repositioned. Check again for .002"
to .004" wink after obtaining the correct tooth en-
gagement.
Base Adjustments and Removals
Grounding of Forms Carts
Adjust the forms-cart guides so that their contact
springs press firmly against the sides of both the front
and rear carts when they are in position. Late ma-
chines have fixed grounding assemblies, which require
no adjustment.
Left Shock-Mount Leveling
Level the left shock-mount support casting so that it is
parallel to the printer casting within
Ye"
in the:
1. Left-to-right plane.
2. Front-to-back plane.
Adjust the two front and back jackscrews to obtain
this.
Translator-Frame Removal
1. Remove the forms.
2. Remove the top paper guide.
3. Remove the paper guide at the bottom of the trans-
lator frame.
4. Remove the front paper guide (below the translator
frame).
5. Remove the ground wire to the translator frame.
6. Lower the translator frame to the lowest position
with the vertical-print-alignment knob.
7. Remove the bumper stop stud:
a. From the left end of the translator frame.
b. From the right end of the translator frame.
Remove the tractor shafts and the tractor mounting
bars. Remove the T -casting. Remove the hammer unit
assembly.
Free the translator frame.
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 translator vernier shaft (a
screw and washer on late machines). See Figure 5.
4. Unscrew the vernier shaft from the translator frame.
5. Move the translator lock 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.
Reinstall in reverse order.
Perform the following adjustments:
1. Position the translator frame.
2. Position the T-casting front to rear.
3. Position the T -casting vertically.
Replace the remaining parts in reverse order.
Translator-Frame Positioning
Check that the six guide rollers rest against their re-
spective guiding surfaces. Adjust for .005" minimum
clearance between the printer casting and:
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.
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