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HP Z420 Workstation - Removing and Replacing the Rear System Fan

Introduction
This document is provided to assist in removing and replacing the rear system fan for the HP Z420 Workstation.
Minimum skill level
The end user should possess product-specific knowledge and technical skill on how to service the system, and have familiarity with the operating system.
Parts required
  note:
Part numbers are subject to change.
The replacement part number will vary depending on the rear system fan that is being replaced. If a part is listed as "Yes" under "Requires Return", then the defective part needs to be returned to HP. Click here for more information on returning parts to HP.
Description
Part Number
Requires Return
Rear System Fan Assembly and Holder
663347-001 (Modified)
Yes
  note:
For customers in countries/regions with RoHS legislation (e.g. EU, China, etc.) restricting the use of hazardous substances in electrical equipment. The use of the "Original" spare part is regulated by RoHS legislation. If the unit contains a part that is labeled with the "Modified" spare number, the "Modified" spare part must be ordered as the replacement part. If the unit contains a part that is labeled with the "Original" spare number, please order the "Original" spare number as the replacement part. In this case, either the "Original" or the "Modified" spare number may be shipped which will not affect performance or functionality of the unit.
Summary of instructions
To view a video demonstrating the procedure for removing the rear system fan, click here to view the HP Services Media Library and then click on Remove/Replace videos. On the new window, select Rear system fan from the menu on the upper left hand side of the screen.
Rear system fan removal
  1. Review the safety considerations before performing the steps listed below by clicking on the following link:
      caution:
    Failure to comply with the precautions could result in damage to the product or loss of data.
  2. Disconnect the fan cable from the system board.
  3. Press down firmly on the top of the fan holder to release the tabs and rotate it back.
  4. Lift the fan out of the chassis.
Rear system fan replacement
  1. Insert the two tabs at the bottom of the fan housing into the slots in the chassis.
  2. Rotate the fan against the retaining bracket and push until the release tabs snap into place.
  3. Connect the fan cable to the system board.
  note:
Please refer to the product-specific Maintenance and Service guide for any future technical information and/or installation guidelines for this component. Click here to access product-specific Maintenance and Service guide.

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