Dell 2135cn Service Manual page 574

Chapter 3 Removal and Replacement Procedures (RRPs)
14) Release the groove on the ROLL
ASSY FEED from the vertical pin mounted
on the SHAFT ASSY FEED (PL3.2.2) by
sliding the ROLL ASSY FEED to the left.
15) Close the COVER ASSY FRONT.
16) Remove the ROLL ASSY FEED from
the SHAFT ASSY FEED by rotating the
ROLL ASSY FEED 180 degrees.
17) Open the COVER ASSY FRONT.
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Version 1 2008.02.01