11 28 010 Replacing alternator drive belt (M52/S52/M52TU/M54/M56)

NOTE: If the drive belt is to be subsequently reused:

Mark direction of travel and reinstall drive belt in same direction of travel.

Necessary preliminary tasks:

Remove cap from tensioning roller.

Fig 1: Removing Cap From Tensioning Roller

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Relieve tension on belt drive.

Remove drive belt.

Fig 2: Removing Drive Belt

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IMPORTANT: Drive belt must be replaced if fouled with hydraulic fluid.

Installation:

Check drive belt for coolant and oil residues, replace if necessary.

Installation:

Check that belt is correctly positioned on belt pulleys.

Fig 3: Checking Alternator Belt Routing

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Version With Auxiliary Tensioning Roller

Fig 4: Identifying Drive Belt Routing With Auxiliary Tensioning Roller

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Installation:

Locking device of auxiliary tensioning roller must snap into groove on alternator.

Fig 5: Locking Device Of Auxiliary Tensioning Roller

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