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4.2.45
50, 100, and 155 ipms Forms
Tension Assembly (Continued)
4.2.45.2 Print Units with Pivot Pins and
Two Paper Clamp Engaging
Levers
Note:
The levers and guideplates for the lower
paper clamp affect the forms tension. See 4.2.44.1
Adjustment,
step 5.
Service Check
1.
2.
3.
Power down.
Remove the printer covers (4.2.1), and
forms.
Remove the print unit assembly (4.2.10.2).
4.
Load about 35 inches (900 mm) of single-
part forms that are wide enough to contact
all six tension springs.
5.
Operate the tension springs against the forms
by lifting the levers
Ii
until the assembly
locks.
Note:
Hold levers up by inserting folded
paper or other supporting material between
the levers and the printer base.
6.
Check for 100 to 125 grams tensi on
m
while pulling the forms upward.
Note:
With the print unit installed, the
maximum tension is 250 grams.
7.
If the tension is not OK, do the adjustment.
Adjustment
1.
2.
3.
4.
Operate the tension springs against the forms
by lifting the levers
a
until the assembly
locks. Check that all tension springs touch
the lower forms guide at the same time.
Form each spring
m
as needed.
Unhook clevis
E1
and turn it on the link
to adjust the tension. Hook the clevis.
Repeat the service check, steps 5, 6 and 7.
Install the print unit assembly (4.2.10.2).
5.
Install the rear forms guide and covers.
4-66
Removal
1.
2.
3.
4.
5.
6.
7.
8.
Remove the printer covers (4.2.1) and
print unit (4.2.10.2).
Unhook the spring from the right end of
the clamp bar.
Note:
Nylon pin might fall out.
Unhook the clip
Pl
and remove the link
and clip assembly from the shaft.
Raise both levers
Ii ,
then remove pin
II
from each lever.
Note:
The right pin is part of the pin and
lever assembly
(I .
Remove two screws
II
from each sole-
noid bracket.
Loosen screw
II '
then remove retainer
plate
m .
Carefully raise the clamp bar, then rotate
the forms tension shaft
D
forward and
slide the shaft to the left until the right
end is clear of the right pivot. Remove
bushing
m
from the left end.
With the clamp bar raised, lift the right
end of the shaft up and to the right until
clear of the left pivot. Lift the shaft up be-
tween the rear forms guide and the clamp
bar. If more clearance is needed, loosen
the cable clamps.
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