Clutch Actuator Valve and Gear Selection Valves

Clutch Actuator Valve and Gear Selection Valves

Removing

CAUTION!
There is a risk of injury. The pressure in the R tronic hydraulic system may be up to 50 bar.

• Always reduce system pressure first before working on the R tronic hydraulic system. Refer to => [ Hydraulic System, R Tronic, Building System Pressure ] Procedures.

- Body Protectors, Installing. Refer to => [ Body Protectors, Installing ] Body Protectors, Installing.

- Remove the left - 1 - and right - 3 - engine compartment trim.





- Remove the engine cover - 2 -.

- Remove the air filter housing.





CAUTION!
There is a risk of mixing up the electrical connectors.

• To prevent the electrical connectors on the gear selection valves and on the Hydraulic Pressure Sensor (G270) from getting mixed up, mark them with colors. If the color marking is no longer visible, mark the electrical connectors before removal so they will not get mixed up.

Color identification:

- 1 -, "blue"

- 3 - , "white"

- 4 -, "green"







- Disconnect the electrical connectors on the valves that will be removed:

1 Gear Selection Valve 3 (N286)
3 Gear Selection Valve 2 (N285)
4 Clutch Actuator Valve (N255)
5 Gear Selection Valve 1 (N284)

• Ignore - 2 -.

- Remove the bolts on the valve that will be removed and remove the valve from the R tronic shift actuator.





1 Gear Selection Valve 3 (N286)
3 Gear Selection Valve 2 (N285)
4 Clutch Actuator Valve (N255)
5 Gear Selection Valve 1 (N284)

• Ignore - 2 -.

Installing

• Tightening specifications. Refer to => [ Shift Actuator, R Tronic Assembly Overview ] .

Install in reverse order, paying attention to the following:

- Replace the O-rings for (N255), (N285), (N286):





1. Black O-ring

2. Green O-ring

3. Black O-ring

4. Green O-ring

• Note the different diameters.

- Replace the Gear Selection Valve 1 (N284) O-ring:





1. Brown O-ring

2. Green O-ring

3. Black O-ring

• Note the different diameters.

• Depending on the version, a strainer is still installed in front of Gear Selection Valve 1 (N284) (refer to => [ (Item 30) Strainer ] ). The auxiliary strainer cannot be installed on vehicles without the strainer because the shift actuator is different on the R tronic.

- Bleed clutch system. Refer to => [ Clutch System, Bleeding ] Clutch System, R-Tronic, Bleeding.

- Install the air filter housing.

- Install the engine compartment trim.