12 31 020 Removing and installing or replacing alternator (B36, B38)

Necessary preliminary tasks: 

• Clamp off BATTERY EARTH LEAD .
• Remove CROSS CONNECTION .
• Remove SERVOMOTOR FOR ECCENTRIC SHAFT .
• Remove DRIVE BELT FOR ALTERNATOR .

Removal: 

Case installed: 

Fig 1: Partition Wall, Expansion Rivet And Screw

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Release expansion rivet (1).

Release screw (2).

Remove partition wall (3).

Unfasten fuel line (1) and disconnect.

Close fuel lines.

Catch and dispose of escaping fuel.

Lay fuel line to one side.

Unlock tank ventilation line (2) and remove from tank venting valve.

Put tank ventilation line (2) to one side.

Fig 2: Tank Ventilation Line And Fuel Line

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Unlock connector (1) and pull off.

Release nut (2) and remove positive battery cable from alternator.

Fig 3: Alternator Connector And Nut

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Release screws (1).

Fig 4: Alternator Screws

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Feed out alternator (1) and remove.

Fig 5: Feeding Out Alternator

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Installation: 

Feed in alternator (1).

Fig 6: Feeding In Alternator

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Tighten down screws (1).

Tightening torque 12 31 1AZ .

Fig 7: Alternator Screws

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Attach connector (1).

Connector (1) must engage audibly.

Connect positive battery cable to alternator.

Tighten nut (2).

Tightening torque 12 52 2AZ .

Fig 8: Alternator Connector And Nut

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Connect fuel line (1).

Connect tank ventilation line (2).

Fig 9: Tank Ventilation Line And Fuel Line

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Position partition wall (3).

Tighten screw (2).

Attach expanding rivet (1).

Fig 10: Partition Wall, Expansion Rivet And Screw

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