Forms Positioning - IBM 1403 Field Engineering Maintenance Manual

(2) The detent ann spring causes correct operation of
the detent anns and wheels (there should be a force of
4!1
to
6!1
pounds on the detent ann).
(3) The detent arm roller seats fully in the detent
wheel when the detent is operative.
3. If the conditions in step 2 are met, no further ad-
justment is necessary. Proceed to step 11. If not:
a. Unhook the detent-arm springs.
b. Loosen both the detent wheels.
c. Slide the right detent wheel to the right.
d. Loosen the detent-arm collars.
e. Slide the detent arms to the left.
f. Loosen the camming plate on the shift fork so
that the plate is just free to slide.
g. Loosen the setscrew that holds the camming-
plate roller stop rod.
h. Wedge some paper between the shift-fork tines
and the hub of the shift gear to center the tines
around the shift-gear hub.
4. Position the shift fork on the shift rack for gear
mesh and clearance.
a. Detent the shift rack in 6-line drive at the right.
b. Position the shift fork on the shift rack so that
the shift gear meshes with the 6-line driving and
driven gears and has clearance to the casting.
c. Rotate the shift fork around the shift rack to
center the shift fork around the shift-gear hub.
d. Clamp the shift fork to the shift rack.
5. Align the detent arms to the camming plate.
a. Set the shift gear to 6-line drive position.
b. Align the detent arms with the left two slots in
the camming plate.
c. Tighten the collars to hold the detent arms in
position.
6. Adjust for a clearance between the detent wheels
and the detent arms of .025" with the manual
clutch in either 6- or 8-line drive.
a. Turn the 6- and 8-line gear idler to a position
where it does not move when the shift gear is
shifted from the 6-line drive to the 8-line drive,
or vice versa.
b. Set the shift gear to the 8-line neutral position.
c. Slide the right detent wheel opposite the right
detent arm.
d. Use a rubber band to hold the right arm against
the detent.
e. Adjust the camming-plate roller stop rod to
provide a .025" clearance between the detent
arm and the teeth of the right detent wheel.
f. Tighten the setscrew to hold the camming-
plate roller stop rod.
g. Rehook the springs on the detent arms.
h. Clamp the camming plate to the shift fork.
7. Align the detent wheels to the detent arms.
a. Set the manual clutch to 8-line neutral.
b. Align the left detent wheel to the left detent
arm.
c. Clamp the left detent wheel to the tractor shaft.
d. Set the manual clutch to 6-line neutral.
e. Align the right detent wheel to the right detent
arm.
f. Clamp the right detent wheel to the tractor
shaft.
g. Check the operation of the manual clutch for
four manually operated spaces.
h. Readjust as necessary.
8. Set the spring tension to provide 4!1 to 6!1 pounds
force on the detent arm when it is engaged in the
detent wheel.
9. Remove the paper from between the shift-fork
tines and the shift-gear hub.
10. Position the clutch-interlock switch.
a. The switch must transfer before the plunger
completely clears all of the four grooves of the
shift rack.
Note: The switch operating plunger must have a
minimum of .005" clearance to the rack grooves when
detented.
b. Position the switch to obtain this adjustment.
11. Replace the remaining parts in reverse order.
Forms Positioning
Tractor Shafts and Tractor Mounting Bars Removal
This procedure is given for the removal of the upper
and lower tractors, the tractor mounting bars, and the
drive shafts. If only one set is to be removed, do only
as much of each step as will allow the desired set to
be removed.
1. Remove the forms.
2. Remove the clip-on paper guides from the tractor
mounting bars.
3. Remove the inner front cover.
4. Remove the upper and lower forms-guide bars with
the jam bars attached (early machines only).
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