64 51 525 Removing and installing or replacing expansion valve: Notes

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WARNING: Danger of injury!

Refrigerant circuit is under high pressure!

Avoid contact with refrigerant and refrigerant fluid.

Read and comply with SAFETY INFORMATION .

IMPORTANT: Risk of damage!

Restart engine only when air conditioning system has been correctly filled.

Follow notes for OPENING AND REPLACING PARTS IN REFRIGERANT CIRCUIT .

If air conditioning system is opened for more than 24 hours: Replacing DESICCANT INSERT for air conditioning system

Necessary preliminary work:

DRAW OFF/EVACUATE the heating and air conditioning system
Remove SOUND INSULATION FROM BULKHEAD UPPER SECTION

Feed out line penetration (1) towards top.

Fig 1: Identifying Line Penetration

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Release screws (1) and remove refrigerant lines (2) with associated seal.

Tightening torque 64 53 1AZ .

Installation note:

Replace sealing rings.

Use special tool 00 9 030 to install sealing rings without damaging them.

Fig 2: Identifying Refrigerant Lines And Screws

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F02 Automatic rear air-conditioning system only:

Release screw (1).

Tightening torque 64 53 7AZ .

Remove refrigerant line (2) with associated seal.

Installation note:

Replace sealing rings.

Use special tool 00 9 030 to install sealing rings without damaging them.

Fig 3: Identifying Refrigerant Line And Screw

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Unscrew nuts (1).

Tightening torque 64 53 9AZ .

Remove sealing plate (2) by maneuvering upwards.

Fig 4: Identifying Sealing Plate And Nuts

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Feed out foam material (1).

Unfasten screws (2).

Tightening torque 64 53 2AZ .

Carefully remove flange (3) with expansion valve behind.

Installation note:

Replace sealing rings.

Use special tool 00 9 030 to mount sealing rings without damaging them.

Flange (3) must be correctly seated on expansion valve.

Fig 5: Identifying Flange And Screws

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