Leak Detection Pump: Service and Repair

WM 204819 Removing and installing leakage diagnosis pump (LDP)

General warning notes

Group 20 - Fuel supply, control

WARNING

Toxic substances

- Danger of poisoning or suffocation

-> Ventilate the work area well.
-> Never ingest or inhale.
-> Read specific information on the Hazard Sheet.
-> Wear personal protective gear.

WARNING

Highly inflammable or explosive materials

- Danger of fire or explosion

-> Avoid contact with hot parts or sources of ignition.
-> Use suction to remove ignitable vapours.
-> Attach warning sign in a clearly visible position.

Information

- Absorb any escaping fuel using a suitable binding material or a cloth.

- Cloths which have absorbed fuel must be disposed of according to the applicable national laws.

- The fuel system must be depressurised before starting work on it.

- Only work on the fuel system in well-ventilated rooms.

- Any seals which have been removed must always be replaced.

- Do not use any sealant containing silicone or silicone spray when the injection system is open. Traces of silicone drawn in by the engine are not combusted and damage the oxygen sensors.

Preliminary work

1. Remove carbon canister and place it on a clean surface. -> 202519 Removing and installing carbon canister - section on "Removing" Service and Repair

Removing leakage diagnosis pump (LDP)





Installation position of leakage diagnosis pump

1. Pull air hose -4- off the leakage diagnosis pump -1- ( -B- ).





Removing leakage diagnosis pump





2. Unscrew three fastening screws -5-.
3. Pull leakage diagnosis pump -1- off the carbon canister -2- ( -A- ).

Installing leakage diagnosis pump (LDP)

1. Check rubber flange -3- for damage and replace it if necessary.





Installing leakage diagnosis pump





2. Fit rubber flange -3- on the connection piece on the leakage diagnosis pump and fit leakage diagnosis pump -1- on the carbon canister -2- ( -B- ).
3. Screw in three fastening screws.
4. Fit air hose -4- on the leakage diagnosis pump -1- ( -B- ).

Subsequent work

1. Install carbon canister. -> 202519 Removing and installing carbon canister - section on "Installing" Service and Repair