IBM 1403 Field Engineering Maintenance Manual page 26

b. Insert the setscrew and lock the lower eccentric
bearing to the lower arm of the T -casting.
c. Remove the taper pins.
d. vVithdraw the hinge pin.
Prepare the translator frame for the T -casting re-
placement.
1. Place the bushing in the upper
arm
of the trans-
lator frame and lock the bushing as high as possible
in the arm.
2. Piace the thrust washer over the jackscrew in the
lower arm of the translator frame, align the hole
centers, and 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 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 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
bearing in the upper arm of the T -casting.
3. Thread the hinge pin through the loose parts in
correct 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
hoie in the iower 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 binge pin until the high side of the eccen-
trics are to the right.
26
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.
2. Position the T-casting vertically.
3. Adjust the ribbon-shield assembly.
Replace the remaining parts in reverse order.
Horizontal T -Casting Positioning (Chain-to-Hammers)
Before making this adjustment, you must position the
hammer unit correctly, front to rear, and adjust the
cartridge and movable base correctly on the T -casting.
Refer to Aligning the Hammers to the Paper Path.
The adjustable stop stud can wear into the T -casting
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ing the hammer-to-chain adjustment. If this condition
is
observed~
install field T-casting strike plate (B/M
485176). Newer machines have this plate.
Check for any foreign material between the strike
plate and the T -casting.
Also check the cartridge mounting as follows:
Loosen the four holding screws, and while holding the
cartridge toward the front of the machine (the direc-
tion the hammers tend to push it) retighten the
screws. This prevents possible change of hammer-to-
chain relationship due to any clearance that might
exist between the cartridge aligning pin and the guide
hole in the movable base.
1. Remove the ribbon guide wire. Remove the ham-
mer unit cover.
2. Remove the ribbon and set the density control on
E. Insert the .083" rod end of the tool (part 451615)
between the hammer faces and the chain at the
right (and also the left) end of the cartridge (Fig-
ure 18).
Note: Do not confuse this with a similar adjustment made
with a similar tool on the Model 3 printer (see Figure 2),
3. Increase the density setting until a light drag on
the tool is obtained. If the clearance is correct, the
density control should be at C setting.
4. If incorrect on the right end of the T -casting, per-
form step 5. If incorrect on the left end of the
T -casting, perform step 6.