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12H-M12M0-0309-0
2-2-5. Automatic up/down mechanism of paper feed tray (DF-920 only)
If this mechanism has been removed during motor replacement, attach it using the following procedure.
q Attach a pulley to the drive motor at the position
shown in the figure.
w Apply a very small amount of thread locking to the set
screw. (Loctite 242: Medium strength/for screws)
e Check for thrust play of the drive shaft assembly. At
shipment, a shim (adjusting washer) is inserted
between the collar and bearing (outer ring) at frame F
side to control thrust play to below 0.1 mm (0.004").
Check that thrust play is not minus (pressed state).
r While ensuring the e state, insert the bearing and
collar at the bracket side, and secure the bracket.
t Apply a very small amount of oil to the area where the
drive shaft and bearing are connected.
(Orelube G90-140)
y Attach the plate and rack so that their surfaces touch
and slide.
u Adjust the points on the eccentric shaft and rack, and
secure temporarily. (Primary adjustment)
i Move the rack up and down, and check that there is
appropriate backlash (0.1 to 0.2 mm (0.004" to
0.008")) where the rack and gear engage, and the
rack moves smoothly. Do not tighten the set screw of
the gear just yet. Tighten after completing the
adjustment of “2-2-7”.
The rack fulcrum Z (0Z4-08022) is designated as a
semi-durable part. Replace it appropriately after
50000 times of up/down movements of the paper
feed tray.
o Apply grease to the following parts. (Orelube G1650)
Contacting area between the up/down lever and
bearing outer ring
Connected area and sliding area of the eccentric
shaft and rack long hole
Connected area and sliding area of the Z part and
rack long hole
Sliding area of the plate and rack
Engaged area of the rack and gear
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