Before performing this task, you must first unpack and secure the chassis. See the Cisco CRS Carrier Routing System 16-Slot Line Card Chassis Unpacking, Moving, and Securing Guide.

The upper grille support should already be installed at the top of the chassis. See the Installing the Upper Grille Support for more information.

You need the following tools and parts to perform this task:

• 8-in. long number 1 Phillips screwdriver—magnetic head preferable, bit size #1
• 3/8-in. drive ratchet wrench
• Default vertical cable troughs (Cisco product number 800–35625–xx [right], 800–35644–xx [left])
• Optional wide vertical cable troughs (Cisco product number 800–36457–xx [right], 800–36456–xx [left])
• Optional cable pass-through accessory kit (Cisco product number CRS–LCC–CM–COVER), used with default cosmetics
• Upper grille (Cisco product number 800–35465–xx)
• Lower grille (Cisco product number 800–35466–xx)
• Exterior doors kit (Cisco product number CRS–16–DOORS–F)

1.    Unpack all cosmetic parts to prepare for installation.

2.    (Attaching the Default Front Vertical Cable Troughs) Attach the vertical cable troughs—one right and one left—to the front (PLIM) side of the chassis (see Installing the Front Vertical Cable Troughs figure below):

3.    (Installing the Cable Pass-through Accessory Plates (Optional)—Default Cable Trough Only) Remove the blank plates by unscrewing the four screws on each one.

4.    Attach the inner cut-out plates using the four screws provided. See the Cut-Out Plates figure.

5.    Attach the outer cut-out plate using the four screws provided.

6.    (Attaching the Optional Wide Front Vertical Cable Troughs (Optional Trough)). Attach the vertical cable troughs—one right and one left—to the front (PLIM) side of the chassis (see Installing the Front Vertical Cable Troughs above):

7.    (Installing the Upper Grille) Attach the upper grille by carefully inserting the four tabs on the grille into the appropriate hook hanger brackets on the top of the upper grille support (see below figure).

8.    Press the grille and bezel firmly against the chassis until it snaps onto the ball stud snaps.

9.    (Attaching the Lower Grille) Attach the lower grille by carefully inserting the tabs on the grille into the brackets on the bottom of the inlet grille frame.

10.    Press the lower grille firmly until it snaps onto the ball stud snaps.

11.    (Attaching the Front Exterior Doors) Orient the doors so that the slot on the metal part in the middle of the doors is lined up with the tab on the vertical cable trough. The door will then drop into position. See the below figure.

12.    Insert the screws into the appropriate screw holes in the doors, and use the screwdriver to tighten fully. There are 11 M4x8 screws on each side for the metal sections of the doors and six M4x8 screws on each side for the plexiglass section of the door.

13.    Ensure that the doors are properly aligned.

14.    For wide duct installations (see Door Adjustments for Wide Trough Installation figure below):

Step 1	Unpack all cosmetic parts to prepare for installation.
Step 2	(Attaching the Default Front Vertical Cable Troughs) Attach the vertical cable troughs—one right and one left—to the front (PLIM) side of the chassis (see Installing the Front Vertical Cable Troughs figure below): Note    The part number for the right side vertical cable trough is 800–35625–xx; the part number for the left side vertical cable trough is 800–35644–xx. Tug all Velcro straps forward so that they are flush with the back side of the cable troughs (where the troughs attach to the chassis) to ensure that the troughs fit flush to the chassis. Insert the cable trough positioning studs into the guide slots on the unistrut, and let them slide down and lock into place. Insert the 10 M4x14-mm flat head screws (five on each trough) and use the screwdriver to turn the screws clockwise to attach the cable troughs firmly to the front of chassis. Figure 4. Installing the Front Vertical Cable Troughs This Image 209820.jpg is not available in preview/cisco.com
Step 3	(Installing the Cable Pass-through Accessory Plates (Optional)—Default Cable Trough Only) Remove the blank plates by unscrewing the four screws on each one. Note    Depending on the size of the installation and the number and type of cables being used, the body of the chassis may become overcrowded and unable to accommodate all the required cables. To resolve this issue, you can install two pass-through accessory plates to allow cables be guided outside the default vertical troughs.
Step 4	Attach the inner cut-out plates using the four screws provided. See the Cut-Out Plates figure. Figure 5. Cut-Out Plates
Step 5	Attach the outer cut-out plate using the four screws provided.
Step 6	(Attaching the Optional Wide Front Vertical Cable Troughs (Optional Trough)). Attach the vertical cable troughs—one right and one left—to the front (PLIM) side of the chassis (see Installing the Front Vertical Cable Troughs above): Note    The part number for the right side vertical cable trough is 800–36457–xx; the part number for the left side vertical cable trough is 800–36456–xx. Tug all Velcro straps forward so that they are flush with the back side of the cable troughs (where the troughs attach to the chassis) to ensure that the troughs fit flush to the chassis. Insert the cable trough hooks into guide slots, and let them slide down and lock into place. Insert the ten M4x14–mm flat head screws (five on each side) and use the screwdriver to turn the screws clockwise to attach the cable troughs firmly to the front of the chassis. See the below figure . Figure 6. Attaching Wide Vertical Cable Troughs to Front of Chassis Insert the twelve M8x12 screws that attach the three brackets (two screws on each bracket) on each trough to the side of the chassis. Use the screwdriver to turn the screws clockwise to attach the cable trough brackets firmly to the side of the chassis. See the below figure. Note    The brackets for securing the wide cable trough to the side of the chassis are shipped pre-installed on the cable trough. Figure 7. Attaching Wide Vertical Cable Trough Brackets to Side of Chassis
Step 7	(Installing the Upper Grille) Attach the upper grille by carefully inserting the four tabs on the grille into the appropriate hook hanger brackets on the top of the upper grille support (see below figure).
Step 8	Press the grille and bezel firmly against the chassis until it snaps onto the ball stud snaps. Figure 8. Attaching the Front Upper Grille
Step 9	(Attaching the Lower Grille) Attach the lower grille by carefully inserting the tabs on the grille into the brackets on the bottom of the inlet grille frame.
Step 10	Press the lower grille firmly until it snaps onto the ball stud snaps. Figure 9. Installing the Front Lower Grille 1 Front lower grille Note    The procedure for installing the front doors on the default vertical cable troughs and the wide cable troughs is the same.
Step 11	(Attaching the Front Exterior Doors) Orient the doors so that the slot on the metal part in the middle of the doors is lined up with the tab on the vertical cable trough. The door will then drop into position. See the below figure. Note    The part number for the right door is 800–35628-xx; the part number for the left door is 800–35646-xx. The door lock is on the left door. Caution    The doors scratch easily, so they should be handled with care. Figure 10. Attaching the Front Doors 1 Screw locations
Step 12	Insert the screws into the appropriate screw holes in the doors, and use the screwdriver to tighten fully. There are 11 M4x8 screws on each side for the metal sections of the doors and six M4x8 screws on each side for the plexiglass section of the door. Note    To ensure that the door is well supported during installation, insert screws in the upper and lower metal sections first.
Step 13	Ensure that the doors are properly aligned. The following substeps apply to the default cosmetics. Note    Typically, the doors will close without interfering with each other. However, you may need to adjust either the left or right door, or both, to align the doors properly. Adjust doors only if necessary. Check to see if the doors close without interfering with each other. To decrease the door gap, loosen the screws that secure the vertical trough to the chassis. Using the 2 mm hex key wrench, tighten the bottom set screws one full turn. Snug the screws that attach the vertical trough to the chassis and check the door alignment. To increase the door gap, loosen the screws that secure the vertical trough to the chassis. Using the 2 mm hex key wrench, tighten the top set screws one full turn. Snug the screws that attach the vertical trough to the chassis and check the door alignment. Repeat the procedure as necessary until the doors are properly aligned. Tighten the screws that secure the vertical trough to the chassis.
Step 14	For wide duct installations (see Door Adjustments for Wide Trough Installation figure below): Ensure that the doors are properly aligned. Note    Typically, the doors will close without interfering with each other. However, you may need to adjust either the left or right door, or both, to align the doors properly. Adjust doors only if necessary. Check to see if the doors close without interfering with each other. (Minor adjustments) Increase or decrease the door gap by loosening and adjusting the eleven (11) screws on each door as needed. (Major adjustments) Increase or decrease the door gap by loosening the seven (7) screws on the vertical metal bar on each door as needed. (Major adjustment) Using a flat blade screwdriver, insert it in the adjustment bracket (upper and lower) and pry either left or right to increase or decrease the door gap (see Door Adjustments for Wide Trough Installation figure below). Tighten all screws that were loosened during the procedure. Repeat procedure if additional adjustments are needed. Figure 11. Door Adjustments for Wide Trough Installation 1 Minor adjustments (11 screws) 3 Major adjustments (7 screws on the vertical metal bar on each door) 2 Screwdriver location

Before performing these tasks, you must first unpack and secure the chassis. See Cisco CRS Carrier Routing System 16-Slot Line Card Chassis Unpacking, Moving, and Securing Guide.

You need the following tools and parts to perform this task:

• 8-in. long number 1 Phillips screwdriver—magnetic head preferable #1
• Rear vertical cable troughs (included in CRS-16-REAR-CM)
• Rear kick plate (included in CRS-16-REAR-CM)
• Upper air grille (CRS–16–REAR–GRL)
• Rear doors (CRS–16–DOORS–R)
• Upper rear air grille with mounting brackets (CRS-16-REAR-GRL), only if vertical troughs are not used
• Rear kick plate with mounting brackets (CRS-16-KP-REAR), only if vertical troughs are not used

1.    Unpack all cosmetic parts to prepare for installation.

2.    (Attaching the Rear Vertical Cable Troughs) Before you attach the left and right vertical cable troughs, if the verticals h ave L-brackets, they will need to be removed so that they do not interfere with the air deflector. See below figure.

3.    Attach the rear vertical cable troughs—one left and one right—to the rear of the chassis (see the figure below) by inserting the 10 M4x14-mm pan head screws (five on each side) and using the screwdriver to turn the screws clockwise to attach the cable troughs firmly to the chassis. (You might need to use a ladder to reach the upper screws.)

4.    (Attaching the Upper Rear Air Grille) Follow these steps if you are using the vertical troughs. To install the upper rear air grille without the vertical troughs, see the Attaching the Upper Rear Air Grille and Rear Kick Plate Without Vertical Troughs. Attach the upper grille by carefully hooking the hanger brackets that are on top of the grille over the hook supports that are on top of the vertical cable troughs (see below figure).

5.    Press the upper rear air grille firmly until its ball studs snap onto the ball stud retainers.

6.    (Attaching the Rear Kick Plate) Carefully slot the tabs on the bottom of the rear kick plate into the brackets on the chassis (see below figure).

7.    To secure the top fasteners, firmly press the top edge of the rear kick plate against the chassis until it snaps onto the ball stud snaps.

8.    (Installing the Rear Doors) Orient the doors so that the slot on the metal part in the middle of the doors is lined up with the tab on the vertical cable trough. The door will then drop into position. See figure below.

9.    Insert the screws into the appropriate screw holes in the doors, and use the screwdriver to tighten fully. There are 10 M4x8 screws on each side for the metal sections of the doors and six M4x8 screws on each side for the plexiglass section of the door.

10.    Ensure that the doors are properly aligned.

Step 1	Unpack all cosmetic parts to prepare for installation.
Step 2	(Attaching the Rear Vertical Cable Troughs) Before you attach the left and right vertical cable troughs, if the verticals h ave L-brackets, they will need to be removed so that they do not interfere with the air deflector. See below figure. Figure 12. Removing L-Brackets
Step 3	Attach the rear vertical cable troughs—one left and one right—to the rear of the chassis (see the figure below) by inserting the 10 M4x14-mm pan head screws (five on each side) and using the screwdriver to turn the screws clockwise to attach the cable troughs firmly to the chassis. (You might need to use a ladder to reach the upper screws.) Note    We recommend that you use two people to install the troughs, one person to hold the troughs in place while the other person inserts and tightens the screws. Figure 13. Attaching the Rear (MSC) Side Vertical Cable Troughs
Step 4	(Attaching the Upper Rear Air Grille) Follow these steps if you are using the vertical troughs. To install the upper rear air grille without the vertical troughs, see the Attaching the Upper Rear Air Grille and Rear Kick Plate Without Vertical Troughs. Attach the upper grille by carefully hooking the hanger brackets that are on top of the grille over the hook supports that are on top of the vertical cable troughs (see below figure). Note    Because the upper rear air grille must be installed at the top of the chassis, it is easier to stand on a ladder while installing it. Note    Ensure cables are dressed correctly to ensure enough clearance to install the upper air grille.
Step 5	Press the upper rear air grille firmly until its ball studs snap onto the ball stud retainers.
Step 6	(Attaching the Rear Kick Plate) Carefully slot the tabs on the bottom of the rear kick plate into the brackets on the chassis (see below figure). Figure 14. Attaching the Rear Kick Plate 1 Rear kick plate
Step 7	To secure the top fasteners, firmly press the top edge of the rear kick plate against the chassis until it snaps onto the ball stud snaps.
Step 8	(Installing the Rear Doors) Orient the doors so that the slot on the metal part in the middle of the doors is lined up with the tab on the vertical cable trough. The door will then drop into position. See figure below. Note    The part number for the right door is 800–35638–xx; the part number for the left door is 800–35475-xx. The door lock is on the left door. Caution    The doors scratch easily, so they should be handled with care. Figure 15. Attaching the Rear Doors
Step 9	Insert the screws into the appropriate screw holes in the doors, and use the screwdriver to tighten fully. There are 10 M4x8 screws on each side for the metal sections of the doors and six M4x8 screws on each side for the plexiglass section of the door. Note    To ensure that the door is well supported during installation, insert screws in the upper and lower metal sections first.
Step 10	Ensure that the doors are properly aligned. Note    Typically, the doors will close without interfering with each other. However, you may need to adjust either the left or right door, or both, to align the doors properly. Adjust doors only if necessary. Check to see if the doors close without interfering with each other. To decrease the door gap, loosen the screws that secure the vertical trough to the chassis. Using the 2 mm hex key wrench, tighten the bottom set screws one full turn. Snug the screws that attach the vertical trough to the chassis and check the door alignment. To increase the door gap, loosen the screws that secure the vertical trough to the chassis. Using the 2 mm hex key wrench, tighten the top set screws one full turn. Snug the screws that attach the vertical trough to the chassis and check the door alignment. Repeat the procedure as necessary until the doors are properly aligned. Tighten the screws that secure the vertical trough to the chassis.