Not familiar with this particular model, but generally ;-
1) Remove deck from mower.
2) Remove all belt covers from top of deck if fitted.
3) Unbolt pulley from spindle. Will probably need impact driver.
4) Unbolt blade from other end of spindle. Impact driver needed.
5) Unbolt spindle from deck pan.
Most spindles have to be replaced as an assembly - bearing replacement is a machine shop job.
phil_saunders@bigfoot.com
Phil Saunders
June 2008