Dell 2135cn Service Manual page 726

Chapter 3 Removal and Replacement Procedures (RRPs)
Replacement 44 COVER ASSY ESS (PL10.1.11)
1) Mate the upper hole of the COVER
ASSY ESS with the PIVOT ASSY.
2) Insert the boss of the HOUSING PIVOT
to the under part of the COVER ASSY
ESS.
3) Secure the HOUSING PIVOT to the
printer with the one screw (silver, 6mm).
Go to the next replacement step:
Replacement 45 COVER POLE OUT (PL10.1.1)
3 - 224
Version 
2008.02.01