Duplo DF-920 Maintenance Manual page 9

(4) Attaching the drive gear (helical gear) of folding
roller
Attach the press spring T and regulated stopper
after attaching the drive gear. This helps
facilitate attaching of the drive gear.
Attach the key, flat pin, and deceleration pulley
for securing the drive gear to the center press
roller.
Attach the key, collar, timing pulley, and thrust
regulated washer for securing the drive gear to
the idler roller.
Attach the key, collar, and thrust regulated
washer for securing the drive gear to folding
rollers 1 and 2.
The teeth of the helical gear is subject to force in
the thrust direction during rotation. When
securing the thrust regulated washer with
screws, check that the helical gear does not
move in the thrust direction.
Using gears in the thrust play state may cause
abnormal wear on the gear teeth side and
wrinkles of the paper due to paper slipping.
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12H-M12M0-0309-0