On the right side of tractor on transmission mounting boss is these numbers; (*EM4H4C) (*6L23B*) (*355273M*) On the right side of engine in the center of pan rail is these numbers; (*NA639484*) (6J03) (82850639). Do any of these numbers give the year & model of tractor? I want to get an operator & repair manual for it. I want to make sure I get the right one to keep from buying the wrong one. Any help will be appreciated. I am new to this. Thank you.