9.Lower the new belt unit into place, with the lifting bar (2) at the front and the drive gear towards the rear of the MFP. Locate the drive gear into the gear inside the printer by the rear left corner of the unit, and lower the belt unit flat inside the MFP.
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10.Turn the two fasteners (1) 90° to the right until they lock. This will secure the belt unit in place.
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1 
11.Replace the four image drums, complete with their toner cartridges, into the printer in the same sequence as they came out: cyan (nearest the rear), magenta, yellow and black (nearest the front).
12.Close the top cover and press down firmly so that the cover latches closed.
13.Gently lower the scanner.
Maintenance > 127