Where can I get information on replacing a rear main seal on a Kubota zero turn model Z331?

I have a rear main seal leak on my kubota zero turn model Z331. I want to replace it but I need some information (scematic, diagram, instructions, etc.) to make sure I do it right.Where can I get information on replacing a rear main seal on a Kubota zero turn model Z331?you can get a repair manual from a Kubota dealer.