Dell 2135cn Service Manual page 730

Replacement 47 KIT BLOCK PHD RIGHT (PL4.1.97)
Accesses Position (The 1), 2) and 3) show the procedure number.)
1) Tilt the LEVER PHD slightly, attach the
LEVER PHD to the printer.
2) Attach the SPRING PHD to the printer.
Version 
2008.02.01
Chapter 3 Removal and Replacement Procedures (RRPs)
3 - 228
3)
1), 2)