To Remove The Midplane Stiffener - Sun Microsystems Datacenter Switch 3456 Installation Manual

7. Insert the fabric card into the chassis at slot 7.
Ensure that the fabric card is vertical.
Note – Once the fabric card is about halfway into the slot, the installers no longer
have to bear the weight of the fabric card.
8. Continue to slide the fabric card in, maintaining a vertical orientation.
When you feel resistance, stop.
9. Rotate both retainer levers to the unlocked position.
10. Slide the fabric card for another 1.75 in (4 cm) until it stops.
11. Rotate both retainer levers to the locked position.
12. Slowly rotate each retainer drive screw clockwise, until resistance is felt, then
stop.
13. Simultaneously rotate the retainer drive screws clockwise, stopping at each half
turn, to maintain synchronization.
During this time, the levers might have moved from the locked position. Move
the levers back to the locked position and continue.
14. Continue synchronized rotation until great resistance is felt, then stop.
15. Verify that the fabric card is properly seated in the slot.
16. Give each retainer drive screw a final turn to torque.
17. Repeat
following slots in the given sequence:
10, 4, 13, 1, 16, 8, 11, 5, 14, 2, 17, 6, 9, 3, 12, 0, 15
18. Retract and secure the antitilt bar.
19. Remove the midplane stiffener.
See

▼ To Remove the Midplane Stiffener

The midplane stiffener must be removed before installing the line cards.
1. Using a 17 mm socket and ratchet, turn each retainer drive screw
counter-clockwise until no resistance is felt.
66 Sun Datacenter Switch 3456 Installation Guide • December 2008
Step 3 through Step 16
"To Remove the Midplane Stiffener" on page
for each fabric card, installing the cards into the
66.