Riso RZ3xx Series Technical Manual page 127

Removing the Piston
(6) Remove the E-ring, detach the arm shaft, and remove the piston.
<<Precautions in Reassembly>>
(1) Apply white plastic grease on the piston and O-ring.
(2) When installing the piston assembly back into the cylinder, make sure that the concave side of the rib on
the arm faces out, and the air intake hole on the piston is on that side.
Air intake hole on the piston
should be on the concave side
of the rib on the arm.
RISO Inc. Technical Communications
Piston
Arm shaft
Piston
[ 7 - 19 ]
CHAPTER 7: PAPER EJECTION SECTION
Arm
Arm
Concave side of the rib faces ourt.
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