OKIDATA ML590 Service Manual page 95

The movement of the Front Release Gear Arm changes the position of the Front Release Gear
Shaft. This causes the Front Pressure Roller to open or close.
The movement of the Release Cam causes the Rear Pressure Roller to open or close.
Position of Status of Front
Change Lever Pressure Roller
Bottom OPEN
Top CLOSED
Rear CLOSED
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Tension of Status of
Front Pressure Rear
Roller Pressure
Roller
N/A OPEN
250 g CLOSED
90 g OPEN
Tension of
Rear Pressure
Roller
N/A
700 g
N/A