All you usually need to do on the DC07 is replace the motor.
However, the 110v machines have one of several motors fitted in there, and if you can tell me which one, I or others can tell you if you need to change the motor rubbers/housing or not.
As a 110v machine, I am assuming this a US market machine? If so, other parts differ on the brush-roll area; so talk to us first if you come to change the brush roll housing, brush roll or sole plate and are not in the US.
If you can post a photo of your motor and/or give me any numbers from it, I can tell you more.