My Electrolux Aerus auto rewind chord mechanism is broken. Is there an easy way to remove the back of the canister to replace or fix the spring there?

Take out the bag and keep the door open.
While the bag door is still open, turn the machine upside down so you are looking at the serial number.
Pull the cord out one foot.
Use a puddy knife and put it between the rubber side rails and the **** end of the machine.
Use a hammer or malett to hit the putty knife from the back of the rubber bumber toward the bag door.
Pull the rubber bumber stright out on both sides.
Once both bumpers are out pull the lower body of the canister from the **** end toward the intake of the machine.
Once the bottom is open you can then service the motor, cord winder, switch, and all other components.
For all the parts to fix the machine visit: http://evacuumstore.com/c-69-electrolux-accessories.aspx?manufacturerfilterid=0