Oki 18 Service Manual page 369

When the secondary stage of idle gear (11) is turned in the A direction after
engaging the plate and the frame, the inclination of the pressure roller (12) is
less than ±0.1 mm against the plate (13), as shown in the right figure. When
the inclination of the pressure roller exceeds ±0.1 mm, fine-adjust it by
pressing with fingers, as shown in the left figure, with the pressure spring
(roller) installed.
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