To install the new Drum Unit:
1.Align the groove on both sides of the Drum Unit to the Drum Unit Front Guides that are located on the front side of the Console Frame. Push the front grip of the Drum Unit until the Drum Unit is set in the proper position.
Drum Unit Front Guide
Center Shaft
Groove
Front Grip
2.Replace the Drum Center Lock on the Center Shaft. Push the lock until it latches. Make sure the lock is latched by pulling. It should not come back out.
3.Turn the handle counterclockwise to close the TH unit.
4.Close the Front Cover of the printer.
5.To clear the usage counter for the Drum Unit, make the following selections from the OCP:
Setup / Consumable / Drum Unit / 
4-14 Care and Maintenance
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