Lexmark T640 Service Manual page 243

Installation
1.
Remove any washer that may be present (A) and discard.
2.
Lubricate areas (A) that engage the journal (B) with grease from the provided packet.
3.
Place the new washer (C) on the bevel gear shaft.
4.
Insert the bottom portion and press or pull into position.
Note: You should hear two distinct snaps. If you only hear one, the bevel gear is only partially engaged
and you should continue to press until the second snap is heard. Very firm pressure is required.
CAUTION: Do not brace your hands below the bevel gear itself. When the gear double-snaps into place, it
may pinch your hand.
5.
Install the power takeoff shaft and spring.
6.
Install the gear guard.
7.
Install the inner shield.
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Repair information