28 10 010 Removing and installing or replacing pump unit (GS7D36SG)

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IMPORTANT: After completion of work, check GEARBOX OIL LEVEL .
Use only the approved TRANSMISSION OIL .
Failure to comply with this instruction will result in serious damage to the twin-clutch gearbox.

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .

Necessary preliminary tasks:

Remove TWIN-CLUTCH GEARBOX .
CLUTCH COVER

Release screws (1).

Tightening torque: 10 Nm,

Remove oil separator (2).

Fig 1: Identifying Oil Separator And Screws

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Release screw (1).

Tightening torque: 6 Nm.

Disconnect connector (3).

Release combination sensor (2) from housing.

Fig 2: Identifying Combination Sensor, Wiring Harness And Screw

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Release screws (1) and (2).

Tightening torque: 10 Nm.

Installation note:

Observe installation position and screw length.

Replace sealing washer on screw (2).

Fig 3: Identifying Sealing Washer Screw

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Release screws (1).

Tightening torque: 25 Nm.

Release oil pump with pressure pipe (2) and return line (3) from housing.

Installation note:

Replace flat seal (4).

During reinstallation O-ring remains on return line.

Fig 4: Identifying Flat Seal, Oil Pump Pressure Pipe And Screws

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IMPORTANT: The pressure pipe must not be detached from the pump.

IMPORTANT: Before installing oil pump:
Depending on version, there is a bore hole and a recess for the O-ring (1).
If the bore hole is present, attention must be paid to ensuring the O-ring (1) is in the right installation position and correctly seated behind the pump.

Fig 5: Identifying O-Ring

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IMPORTANT: Installation sequence, oil pump:

Moisten O-ring with transmission oil
Position pump in transmission using centering sleeves.
Gently insert screws (1) with pressure pipe
Press in return line (2) until it audibly snaps into place
Screw in oil pump
The tightening sequence from 1-8 is mandatory

Fig 6: Identifying Pressure Pipe And Return Line Screws

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Installation note:

Centering sleeves must not be damaged or crushed.

IMPORTANT: Tightening sequence for oil pump:

Position 1 - 8 to final torque
Position: 1, undo once again and to final torque
Position: 1, 2, 5, 6, 7, 8, tightening torque: 10 Nm.
Position: 3, 4 tightening torque : 25 Nm.

Fig 7: Transmission Oil Pump Bolts Tightening/Loosening Sequence (GS7D36SG)
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