Riso RZ5 Series, Technical Manual, Page: 88 / 410

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CHAPTER 6: PRESS SECTION
[ 6 - 10 ]
(6) If step (5) is out of the specification, remove the pressure spring and loosen the two cap screws on the
pressure lever;spring.
(7) Align the hole on the pressure lever;spring with the position-B phase alignment hole, and insert the 8mm
diameter JIG shaft through the two holes to fix the position of the pressure lever;spring in position.
(8) Insert a 4mm Allen wrench through the hole on the tip of the pressure shaft and rotate the Allen wrench in
the counterclockwise direction as shown on the photograph below, so the pressure roller touches the print
drum very lightly. Tighten the two cap screws on the pressure lever;spring to fix the lever onto the shaft.
(9) Recheck whether the pressure lever;spring is attached in a correct position or not by repeating steps (3) to
(5) on the previous page and if the position is still incorrect, repeat the adjustments listed from (6) to (8) on
this page.
JIg (8mm dia.)
4 mm Allen wrench
Pressure lever;spring
Pressure shaft
Symptoms
- If the engraved line on the pressure lever;spring goes out to the left of the two lines on the pressure lever;cam,
the pressure will is too weak and the printing density may become too light. Also the up-and-down motion of
the pressure roller is out of the correct timing, and it may result in ink leakage from the print drum.
- If the engraved line on the pressure lever;spring goes out to the right of the two lines on the pressure lever;cam,
the pressure is too strong. Also, the distance in which the pressure roller escapes from the clamp plate base
assembly becomes less, and the pressure roller may hit the clamp plate. In addition to the too much pressure,
the up-and-down motion of the pressure roller becomes out of timing, and may result in ink leakage from the
print drum.
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