Alternator: Service and Repair

12 31 020 - Removing and installing or replacing alternator (N62)

Switch off ignition.
Follow instructions for disconnecting and connecting battery. Instructions for Disconnecting and Connecting Battery
Disconnect and cover battery negative lead.





Warning!
Danger of scalding!
Only perform these tasks on an engine that has cooled down.





Remove radiator. Service and Repair
Remove alternator drive belt. Replacing Alternator Drive Belt
Remove A/C compressor drive belt Replacing A/C Compressor Drive Belt With Belt Tensioner (N62/N62TU).
Release screws on antifriction bearing on left and right of stabilizer bar.
Hydraulic lines on oscillating motor remain connected. Do not release screws on stabilizer link. Remove stabilizer bar with antifriction bearing from threaded pins and secure against falling down.
Release holder from hydraulic lines for power steering. Hydraulic lines on power steering pump remain connected.





Note:
For purposes of clarity, the following work steps are shown on the engine after it has been removed.

Release screws and remove guide pulley (1).





Unlock plug (1) and remove.
Unscrew nut (2).
Remove battery positive lead from alternator (3).





Recycling
A residual quantity of coolant emerges when the alternator is removed from the housing.
Catch and dispose of escaping coolant.
Observe country-specific waste-disposal regulations.





Release screws on alternator (3).





Pull out alternator towards front.

Installation:
Replace sealing ring (1) on alternator.





Note:
If necessary, replace alternator belt pulley Replacing Alternator Belt Pulley.

Top up coolant. Service and Repair
Vent cooling system and check for leaks. Venting Cooling System and Checking for Water Leaks