Its easy to replace. I start by removing the fan but some have even reported doing it without removing the fan on some models. Disconnect the shock, pull the belt loose, unhook the spring. Inspect and replace the idler pulley if the bearing is shot. Then remove the tensioner secured by the 12 mm allen head. Use blue loctite on the replacement tensioner threads. Assemble in reverse.

Regards,

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Brian Toscano