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HP Z620 Workstation - Removing and Replacing Rear System Fan Assembly

Introduction
This document is provided to assist in removing and replacing the rear system fan assembly for the HP Z620 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.
Tools required
Phillips-head screwdrivers
Parts required
  note:
Part numbers are subject to change.
The replacement part number will vary depending on the rear system fan assembly 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 mounted system fans assembly
683764-001 (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 assembly, click here to view the HP Services Media Library and then click on Remove/Replace videos. On the new window, select Rear system fan assembly from the menu on the upper left hand side of the screen.
Rear system fan assembly removal
  note:
This video was developed using a pre-production version of the workstation. The chassis and parts shown might not exactly match the current production version, but the part removal and replacement steps are the same.
  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. Remove the eight Phillips-head screws that secure the fan assembly to the back of the chassis.
  4. Rotate both fans and lift the assembly out of the chassis.
Rear system fan assembly replacement
  1. Position both fans against the rear chassis wall.
  2. Replace the eight Phillips-head screws that secure the assembly to the back of the chassis.
  3. Connect the fan cable to the system board.
  4.   note:
    Please refer to the product-specific maintenance and service guide at for any future technical information and/or installation guidelines for this component. Click here to refer the product-specific maintenance and service guide.

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