Canon Color imageCLASS MF8170c Basic Manual page 138

Turn the lock release levers located on the back of the machine in
the direction of the arrow and release the lock.
Hold the grip on the fuser unit and remove it.
9
CAUTION
The fuser unit weighs approximately 3.3 lb (1.5 kg), and it is heavier on the back
side. Be sure to hold the grip securely when carrying a fuser unit. Dropping the
unit may result in personal injuries.
Heavier on the back side
9-16 Clearing Jams