Check the play of the release bearing by spinning it by hand. If there is excessive play or noise, replace the release bearing.

NOTE: The release bearing is packed with grease. Do not wash it in solvent.
Alternator Brush Inspection
Measure the length of both brushes (A) with a vernier caliper:
If either brush is shorter than the service limit, replace the brushes,
go to step
20.
If brush length ...
Disassembly
Compress the damper spring, then remove the nut (A) while holding the
damper shaft with a hex wrench (B). Do not compress the damper spring more
than necessary to remove the nut.
...