This site is designed to give quick tips & help for smaller problems. There is no way anyone could give you step by step instructions to do such a big job on here. It involves a major dismantling of many parts and removal of the drum to get access to the bearings & seal. Suggest you do a Google search for a service/repair manual for that model. If you don't have plenty of tools & mechanical knowledge I would suggest getting it done by a service company.
Lincoln Appliance NZ, March 2016
