Removing Carbon Canister

Removing Carbon Canister







NOTE:
- The repair procedure may vary depending on engine type and country equipment. This relates in particular to components in the right wheel housing.
- The description relates to ORVR vehicles.

The following exploded drawing shows the attachment of the fuel filler neck and carbon canister in the right wheel housing.

No. 1 - 7:

WARNING:
Danger of fire.
- Keep clear of ignition sources.
- Do not smoke.
- Danger of fire due to naked flames and sparks, e.g. during welding or grinding work.
- Danger of fire due to escaping fuel, e.g. on hot engine components or due to electrostatic charge.
- Danger of fire due to hot exhaust system. Always allow the exhaust system to cool down.
- Secure the vehicle, e.g. with a warning sign.
- Change any clothing soaked with fuel immediately.
- In case of fire, use CO(2) or dry powder fire extinguishers.

CAUTION:
- Please observe general warning notes and working regulations.
- For safety reasons, the tank should only be removed and installed when empty.

1. Raise the vehicle to the take-up points provided using a lifting platform.
2. Deactivate air suspension.
3. Open filler flap.
4. Screw the tank cap down. Then remove the rubber sleeve around the fuel filler neck, loosen the two fastening screws (M6 x 25) and remove the ground cable.







5. Remove rear right wheel.
6. Remove rear right wheel housing liner.







CAUTION:
Risk of damage
- Lines can become kinked or can crack.
- Never leave carbon canister hanging freely on the lines.
- A second person should hold the carbon canister during removal.

7. Loosen the five fastening screws on the carbon canister and the two on the degassing tank in the right wheel housing -arrows-.







NOTE: In USA vehicles, the rubber hose -2- of the leak diagnosis pump is extremely tight. If the hose is pulled, the filler neck can break off at the leak diagnosis pump.

8. Carefully remove the two electric plugs -3- on the carbon canister and on the leak diagnosis pump and the hose on the filler neck -2- of the leak diagnosis pump (USA). There is always a risk of damage. Then, disconnect plastic line -1-.







9. Cut through the tie-wraps of the ground cable on the carbon canister and take the carbon canister out of the wheel well. Replace tie-wraps.







10. Remove hose connection on the degassing tank.







11. Pull filler neck and degassing tank out of the wheel well and secure with a piece of wire -arrow- (figure shows degassing tank with carbon canister).