Patent ID: 8042930

Claim:
A method of servicing a customer replaceable unit of an imaging device, the method comprising: removing a customer replaceable unit from an imaging device, the customer replaceable unit (CRU) includes a housing in which drum maintenance unit (DMU) components are installed to enable the DMU components to be removed and installed in the imaging device as a self-contained unit, the DMU components installed in the housing including at least an applicator configured to apply a release agent to a surface of an intermediate transfer drum of the imaging device, a reservoir including a supply of the release agent for the applicator, a delivery pump configured to pump release agent from the reservoir to the applicator, a recirculation pump configured to pump release agent from a sump to the reservoir, and a memory including operational data for the customer replaceable unit; performing a maintenance procedure on a DMU component of the customer replaceable unit after removal of the CRU from the imaging device; and installing the CRU into the imaging device after the maintenance procedure on the DMU component has been performed.